commit
065aec5688
2
go.mod
2
go.mod
|
@ -19,7 +19,7 @@ require (
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github.com/docker/go-events v0.0.0-20190806004212-e31b211e4f1c
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github.com/docker/go-metrics v0.0.1
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github.com/docker/libtrust v0.0.0-20150114040149-fa567046d9b1
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github.com/garyburd/redigo v0.0.0-20150301180006-535138d7bcd7
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github.com/gomodule/redigo v1.8.2
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github.com/gorilla/handlers v0.0.0-20150720190736-60c7bfde3e33
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github.com/gorilla/mux v1.7.2
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github.com/inconshreveable/mousetrap v1.0.0 // indirect
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|
|
4
go.sum
4
go.sum
|
@ -41,8 +41,6 @@ github.com/docker/go-metrics v0.0.1 h1:AgB/0SvBxihN0X8OR4SjsblXkbMvalQ8cjmtKQ2rQ
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github.com/docker/go-metrics v0.0.1/go.mod h1:cG1hvH2utMXtqgqqYE9plW6lDxS3/5ayHzueweSI3Vw=
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github.com/docker/libtrust v0.0.0-20150114040149-fa567046d9b1 h1:ZClxb8laGDf5arXfYcAtECDFgAgHklGI8CxgjHnXKJ4=
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github.com/docker/libtrust v0.0.0-20150114040149-fa567046d9b1/go.mod h1:cyGadeNEkKy96OOhEzfZl+yxihPEzKnqJwvfuSUqbZE=
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github.com/garyburd/redigo v0.0.0-20150301180006-535138d7bcd7 h1:LofdAjjjqCSXMwLGgOgnE+rdPuvX9DxCqaHwKy7i/ko=
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github.com/garyburd/redigo v0.0.0-20150301180006-535138d7bcd7/go.mod h1:NR3MbYisc3/PwhQ00EMzDiPmrwpPxAn5GI05/YaO1SY=
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github.com/go-kit/kit v0.8.0/go.mod h1:xBxKIO96dXMWWy0MnWVtmwkA9/13aqxPnvrjFYMA2as=
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github.com/go-logfmt/logfmt v0.3.0/go.mod h1:Qt1PoO58o5twSAckw1HlFXLmHsOX5/0LbT9GBnD5lWE=
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github.com/go-logfmt/logfmt v0.4.0/go.mod h1:3RMwSq7FuexP4Kalkev3ejPJsZTpXXBr9+V4qmtdjCk=
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@ -53,6 +51,8 @@ github.com/golang/protobuf v1.2.0/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5y
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github.com/golang/protobuf v1.3.1/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
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github.com/golang/protobuf v1.3.2 h1:6nsPYzhq5kReh6QImI3k5qWzO4PEbvbIW2cwSfR/6xs=
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github.com/golang/protobuf v1.3.2/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
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github.com/gomodule/redigo v1.8.2 h1:H5XSIre1MB5NbPYFp+i1NBbb5qN1W8Y8YAQoAYbkm8k=
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github.com/gomodule/redigo v1.8.2/go.mod h1:P9dn9mFrCBvWhGE1wpxx6fgq7BAeLBk+UUUzlpkBYO0=
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github.com/google/go-cmp v0.3.0/go.mod h1:8QqcDgzrUqlUb/G2PQTWiueGozuR1884gddMywk6iLU=
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github.com/google/gofuzz v1.0.0/go.mod h1:dBl0BpW6vV/+mYPU4Po3pmUjxk6FQPldtuIdl/M65Eg=
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github.com/gorilla/handlers v0.0.0-20150720190736-60c7bfde3e33 h1:893HsJqtxp9z1SF76gg6hY70hRY1wVlTSnC/h1yUDCo=
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@ -39,7 +39,7 @@ import (
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events "github.com/docker/go-events"
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"github.com/docker/go-metrics"
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"github.com/docker/libtrust"
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"github.com/garyburd/redigo/redis"
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"github.com/gomodule/redigo/redis"
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"github.com/gorilla/mux"
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"github.com/sirupsen/logrus"
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)
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@ -514,11 +514,11 @@ func (app *App) configureRedis(configuration *configuration.Configuration) {
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}
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}
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conn, err := redis.DialTimeout("tcp",
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conn, err := redis.Dial("tcp",
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configuration.Redis.Addr,
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configuration.Redis.DialTimeout,
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configuration.Redis.ReadTimeout,
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configuration.Redis.WriteTimeout)
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redis.DialConnectTimeout(configuration.Redis.DialTimeout),
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redis.DialReadTimeout(configuration.Redis.ReadTimeout),
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redis.DialWriteTimeout(configuration.Redis.WriteTimeout))
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if err != nil {
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dcontext.GetLogger(app).Errorf("error connecting to redis instance %s: %v",
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configuration.Redis.Addr, err)
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@ -8,7 +8,7 @@ import (
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"github.com/docker/distribution/reference"
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"github.com/docker/distribution/registry/storage/cache"
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"github.com/docker/distribution/registry/storage/cache/metrics"
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"github.com/garyburd/redigo/redis"
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"github.com/gomodule/redigo/redis"
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"github.com/opencontainers/go-digest"
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)
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@ -7,7 +7,7 @@ import (
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"time"
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"github.com/docker/distribution/registry/storage/cache/cachecheck"
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"github.com/garyburd/redigo/redis"
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"github.com/gomodule/redigo/redis"
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)
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var redisAddr string
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@ -1,45 +0,0 @@
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// Copyright 2014 Gary Burd
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//
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// Licensed under the Apache License, Version 2.0 (the "License"): you may
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// not use this file except in compliance with the License. You may obtain
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// a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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// License for the specific language governing permissions and limitations
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// under the License.
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package internal // import "github.com/garyburd/redigo/internal"
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import (
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"strings"
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)
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const (
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WatchState = 1 << iota
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MultiState
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SubscribeState
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MonitorState
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)
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type CommandInfo struct {
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Set, Clear int
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}
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var commandInfos = map[string]CommandInfo{
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"WATCH": {Set: WatchState},
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"UNWATCH": {Clear: WatchState},
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"MULTI": {Set: MultiState},
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"EXEC": {Clear: WatchState | MultiState},
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"DISCARD": {Clear: WatchState | MultiState},
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"PSUBSCRIBE": {Set: SubscribeState},
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"SUBSCRIBE": {Set: SubscribeState},
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"MONITOR": {Set: MonitorState},
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}
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func LookupCommandInfo(commandName string) CommandInfo {
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return commandInfos[strings.ToUpper(commandName)]
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}
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@ -1,455 +0,0 @@
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// Copyright 2012 Gary Burd
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//
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// Licensed under the Apache License, Version 2.0 (the "License"): you may
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// not use this file except in compliance with the License. You may obtain
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// a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
|
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// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
|
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// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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// License for the specific language governing permissions and limitations
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// under the License.
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package redis
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import (
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"bufio"
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"bytes"
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"errors"
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"fmt"
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"io"
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"net"
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"strconv"
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"sync"
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"time"
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)
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// conn is the low-level implementation of Conn
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type conn struct {
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// Shared
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mu sync.Mutex
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pending int
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err error
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conn net.Conn
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// Read
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readTimeout time.Duration
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br *bufio.Reader
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// Write
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writeTimeout time.Duration
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bw *bufio.Writer
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// Scratch space for formatting argument length.
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// '*' or '$', length, "\r\n"
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lenScratch [32]byte
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// Scratch space for formatting integers and floats.
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numScratch [40]byte
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}
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// Dial connects to the Redis server at the given network and address.
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func Dial(network, address string) (Conn, error) {
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dialer := xDialer{}
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return dialer.Dial(network, address)
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}
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// DialTimeout acts like Dial but takes timeouts for establishing the
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// connection to the server, writing a command and reading a reply.
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func DialTimeout(network, address string, connectTimeout, readTimeout, writeTimeout time.Duration) (Conn, error) {
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netDialer := net.Dialer{Timeout: connectTimeout}
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dialer := xDialer{
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NetDial: netDialer.Dial,
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ReadTimeout: readTimeout,
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WriteTimeout: writeTimeout,
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}
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return dialer.Dial(network, address)
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}
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// A Dialer specifies options for connecting to a Redis server.
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type xDialer struct {
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// NetDial specifies the dial function for creating TCP connections. If
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// NetDial is nil, then net.Dial is used.
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NetDial func(network, addr string) (net.Conn, error)
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// ReadTimeout specifies the timeout for reading a single command
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// reply. If ReadTimeout is zero, then no timeout is used.
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ReadTimeout time.Duration
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// WriteTimeout specifies the timeout for writing a single command. If
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// WriteTimeout is zero, then no timeout is used.
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WriteTimeout time.Duration
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}
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// Dial connects to the Redis server at address on the named network.
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func (d *xDialer) Dial(network, address string) (Conn, error) {
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dial := d.NetDial
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if dial == nil {
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dial = net.Dial
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}
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netConn, err := dial(network, address)
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if err != nil {
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return nil, err
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}
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return &conn{
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conn: netConn,
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bw: bufio.NewWriter(netConn),
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br: bufio.NewReader(netConn),
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readTimeout: d.ReadTimeout,
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writeTimeout: d.WriteTimeout,
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}, nil
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}
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// NewConn returns a new Redigo connection for the given net connection.
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func NewConn(netConn net.Conn, readTimeout, writeTimeout time.Duration) Conn {
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return &conn{
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conn: netConn,
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bw: bufio.NewWriter(netConn),
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br: bufio.NewReader(netConn),
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readTimeout: readTimeout,
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writeTimeout: writeTimeout,
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}
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}
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func (c *conn) Close() error {
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c.mu.Lock()
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err := c.err
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if c.err == nil {
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c.err = errors.New("redigo: closed")
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err = c.conn.Close()
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}
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c.mu.Unlock()
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return err
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}
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func (c *conn) fatal(err error) error {
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c.mu.Lock()
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if c.err == nil {
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c.err = err
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// Close connection to force errors on subsequent calls and to unblock
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// other reader or writer.
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c.conn.Close()
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}
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c.mu.Unlock()
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return err
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}
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func (c *conn) Err() error {
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c.mu.Lock()
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err := c.err
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c.mu.Unlock()
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return err
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}
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func (c *conn) writeLen(prefix byte, n int) error {
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c.lenScratch[len(c.lenScratch)-1] = '\n'
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c.lenScratch[len(c.lenScratch)-2] = '\r'
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i := len(c.lenScratch) - 3
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for {
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c.lenScratch[i] = byte('0' + n%10)
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i -= 1
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n = n / 10
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if n == 0 {
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break
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}
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}
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c.lenScratch[i] = prefix
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_, err := c.bw.Write(c.lenScratch[i:])
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return err
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}
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func (c *conn) writeString(s string) error {
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c.writeLen('$', len(s))
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c.bw.WriteString(s)
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_, err := c.bw.WriteString("\r\n")
|
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return err
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}
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|
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func (c *conn) writeBytes(p []byte) error {
|
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c.writeLen('$', len(p))
|
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c.bw.Write(p)
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_, err := c.bw.WriteString("\r\n")
|
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return err
|
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}
|
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|
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func (c *conn) writeInt64(n int64) error {
|
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return c.writeBytes(strconv.AppendInt(c.numScratch[:0], n, 10))
|
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}
|
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|
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func (c *conn) writeFloat64(n float64) error {
|
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return c.writeBytes(strconv.AppendFloat(c.numScratch[:0], n, 'g', -1, 64))
|
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}
|
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|
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func (c *conn) writeCommand(cmd string, args []interface{}) (err error) {
|
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c.writeLen('*', 1+len(args))
|
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err = c.writeString(cmd)
|
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for _, arg := range args {
|
||||
if err != nil {
|
||||
break
|
||||
}
|
||||
switch arg := arg.(type) {
|
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case string:
|
||||
err = c.writeString(arg)
|
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case []byte:
|
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err = c.writeBytes(arg)
|
||||
case int:
|
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err = c.writeInt64(int64(arg))
|
||||
case int64:
|
||||
err = c.writeInt64(arg)
|
||||
case float64:
|
||||
err = c.writeFloat64(arg)
|
||||
case bool:
|
||||
if arg {
|
||||
err = c.writeString("1")
|
||||
} else {
|
||||
err = c.writeString("0")
|
||||
}
|
||||
case nil:
|
||||
err = c.writeString("")
|
||||
default:
|
||||
var buf bytes.Buffer
|
||||
fmt.Fprint(&buf, arg)
|
||||
err = c.writeBytes(buf.Bytes())
|
||||
}
|
||||
}
|
||||
return err
|
||||
}
|
||||
|
||||
type protocolError string
|
||||
|
||||
func (pe protocolError) Error() string {
|
||||
return fmt.Sprintf("redigo: %s (possible server error or unsupported concurrent read by application)", string(pe))
|
||||
}
|
||||
|
||||
func (c *conn) readLine() ([]byte, error) {
|
||||
p, err := c.br.ReadSlice('\n')
|
||||
if err == bufio.ErrBufferFull {
|
||||
return nil, protocolError("long response line")
|
||||
}
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
i := len(p) - 2
|
||||
if i < 0 || p[i] != '\r' {
|
||||
return nil, protocolError("bad response line terminator")
|
||||
}
|
||||
return p[:i], nil
|
||||
}
|
||||
|
||||
// parseLen parses bulk string and array lengths.
|
||||
func parseLen(p []byte) (int, error) {
|
||||
if len(p) == 0 {
|
||||
return -1, protocolError("malformed length")
|
||||
}
|
||||
|
||||
if p[0] == '-' && len(p) == 2 && p[1] == '1' {
|
||||
// handle $-1 and $-1 null replies.
|
||||
return -1, nil
|
||||
}
|
||||
|
||||
var n int
|
||||
for _, b := range p {
|
||||
n *= 10
|
||||
if b < '0' || b > '9' {
|
||||
return -1, protocolError("illegal bytes in length")
|
||||
}
|
||||
n += int(b - '0')
|
||||
}
|
||||
|
||||
return n, nil
|
||||
}
|
||||
|
||||
// parseInt parses an integer reply.
|
||||
func parseInt(p []byte) (interface{}, error) {
|
||||
if len(p) == 0 {
|
||||
return 0, protocolError("malformed integer")
|
||||
}
|
||||
|
||||
var negate bool
|
||||
if p[0] == '-' {
|
||||
negate = true
|
||||
p = p[1:]
|
||||
if len(p) == 0 {
|
||||
return 0, protocolError("malformed integer")
|
||||
}
|
||||
}
|
||||
|
||||
var n int64
|
||||
for _, b := range p {
|
||||
n *= 10
|
||||
if b < '0' || b > '9' {
|
||||
return 0, protocolError("illegal bytes in length")
|
||||
}
|
||||
n += int64(b - '0')
|
||||
}
|
||||
|
||||
if negate {
|
||||
n = -n
|
||||
}
|
||||
return n, nil
|
||||
}
|
||||
|
||||
var (
|
||||
okReply interface{} = "OK"
|
||||
pongReply interface{} = "PONG"
|
||||
)
|
||||
|
||||
func (c *conn) readReply() (interface{}, error) {
|
||||
line, err := c.readLine()
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
if len(line) == 0 {
|
||||
return nil, protocolError("short response line")
|
||||
}
|
||||
switch line[0] {
|
||||
case '+':
|
||||
switch {
|
||||
case len(line) == 3 && line[1] == 'O' && line[2] == 'K':
|
||||
// Avoid allocation for frequent "+OK" response.
|
||||
return okReply, nil
|
||||
case len(line) == 5 && line[1] == 'P' && line[2] == 'O' && line[3] == 'N' && line[4] == 'G':
|
||||
// Avoid allocation in PING command benchmarks :)
|
||||
return pongReply, nil
|
||||
default:
|
||||
return string(line[1:]), nil
|
||||
}
|
||||
case '-':
|
||||
return Error(string(line[1:])), nil
|
||||
case ':':
|
||||
return parseInt(line[1:])
|
||||
case '$':
|
||||
n, err := parseLen(line[1:])
|
||||
if n < 0 || err != nil {
|
||||
return nil, err
|
||||
}
|
||||
p := make([]byte, n)
|
||||
_, err = io.ReadFull(c.br, p)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
if line, err := c.readLine(); err != nil {
|
||||
return nil, err
|
||||
} else if len(line) != 0 {
|
||||
return nil, protocolError("bad bulk string format")
|
||||
}
|
||||
return p, nil
|
||||
case '*':
|
||||
n, err := parseLen(line[1:])
|
||||
if n < 0 || err != nil {
|
||||
return nil, err
|
||||
}
|
||||
r := make([]interface{}, n)
|
||||
for i := range r {
|
||||
r[i], err = c.readReply()
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
}
|
||||
return r, nil
|
||||
}
|
||||
return nil, protocolError("unexpected response line")
|
||||
}
|
||||
|
||||
func (c *conn) Send(cmd string, args ...interface{}) error {
|
||||
c.mu.Lock()
|
||||
c.pending += 1
|
||||
c.mu.Unlock()
|
||||
if c.writeTimeout != 0 {
|
||||
c.conn.SetWriteDeadline(time.Now().Add(c.writeTimeout))
|
||||
}
|
||||
if err := c.writeCommand(cmd, args); err != nil {
|
||||
return c.fatal(err)
|
||||
}
|
||||
return nil
|
||||
}
|
||||
|
||||
func (c *conn) Flush() error {
|
||||
if c.writeTimeout != 0 {
|
||||
c.conn.SetWriteDeadline(time.Now().Add(c.writeTimeout))
|
||||
}
|
||||
if err := c.bw.Flush(); err != nil {
|
||||
return c.fatal(err)
|
||||
}
|
||||
return nil
|
||||
}
|
||||
|
||||
func (c *conn) Receive() (reply interface{}, err error) {
|
||||
if c.readTimeout != 0 {
|
||||
c.conn.SetReadDeadline(time.Now().Add(c.readTimeout))
|
||||
}
|
||||
if reply, err = c.readReply(); err != nil {
|
||||
return nil, c.fatal(err)
|
||||
}
|
||||
// When using pub/sub, the number of receives can be greater than the
|
||||
// number of sends. To enable normal use of the connection after
|
||||
// unsubscribing from all channels, we do not decrement pending to a
|
||||
// negative value.
|
||||
//
|
||||
// The pending field is decremented after the reply is read to handle the
|
||||
// case where Receive is called before Send.
|
||||
c.mu.Lock()
|
||||
if c.pending > 0 {
|
||||
c.pending -= 1
|
||||
}
|
||||
c.mu.Unlock()
|
||||
if err, ok := reply.(Error); ok {
|
||||
return nil, err
|
||||
}
|
||||
return
|
||||
}
|
||||
|
||||
func (c *conn) Do(cmd string, args ...interface{}) (interface{}, error) {
|
||||
c.mu.Lock()
|
||||
pending := c.pending
|
||||
c.pending = 0
|
||||
c.mu.Unlock()
|
||||
|
||||
if cmd == "" && pending == 0 {
|
||||
return nil, nil
|
||||
}
|
||||
|
||||
if c.writeTimeout != 0 {
|
||||
c.conn.SetWriteDeadline(time.Now().Add(c.writeTimeout))
|
||||
}
|
||||
|
||||
if cmd != "" {
|
||||
c.writeCommand(cmd, args)
|
||||
}
|
||||
|
||||
if err := c.bw.Flush(); err != nil {
|
||||
return nil, c.fatal(err)
|
||||
}
|
||||
|
||||
if c.readTimeout != 0 {
|
||||
c.conn.SetReadDeadline(time.Now().Add(c.readTimeout))
|
||||
}
|
||||
|
||||
if cmd == "" {
|
||||
reply := make([]interface{}, pending)
|
||||
for i := range reply {
|
||||
r, e := c.readReply()
|
||||
if e != nil {
|
||||
return nil, c.fatal(e)
|
||||
}
|
||||
reply[i] = r
|
||||
}
|
||||
return reply, nil
|
||||
}
|
||||
|
||||
var err error
|
||||
var reply interface{}
|
||||
for i := 0; i <= pending; i++ {
|
||||
var e error
|
||||
if reply, e = c.readReply(); e != nil {
|
||||
return nil, c.fatal(e)
|
||||
}
|
||||
if e, ok := reply.(Error); ok && err == nil {
|
||||
err = e
|
||||
}
|
||||
}
|
||||
return reply, err
|
||||
}
|
|
@ -1,389 +0,0 @@
|
|||
// Copyright 2012 Gary Burd
|
||||
//
|
||||
// Licensed under the Apache License, Version 2.0 (the "License"): you may
|
||||
// not use this file except in compliance with the License. You may obtain
|
||||
// a copy of the License at
|
||||
//
|
||||
// http://www.apache.org/licenses/LICENSE-2.0
|
||||
//
|
||||
// Unless required by applicable law or agreed to in writing, software
|
||||
// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
|
||||
// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
|
||||
// License for the specific language governing permissions and limitations
|
||||
// under the License.
|
||||
|
||||
package redis
|
||||
|
||||
import (
|
||||
"bytes"
|
||||
"container/list"
|
||||
"crypto/rand"
|
||||
"crypto/sha1"
|
||||
"errors"
|
||||
"io"
|
||||
"strconv"
|
||||
"sync"
|
||||
"time"
|
||||
|
||||
"github.com/garyburd/redigo/internal"
|
||||
)
|
||||
|
||||
var nowFunc = time.Now // for testing
|
||||
|
||||
// ErrPoolExhausted is returned from a pool connection method (Do, Send,
|
||||
// Receive, Flush, Err) when the maximum number of database connections in the
|
||||
// pool has been reached.
|
||||
var ErrPoolExhausted = errors.New("redigo: connection pool exhausted")
|
||||
|
||||
var (
|
||||
errPoolClosed = errors.New("redigo: connection pool closed")
|
||||
errConnClosed = errors.New("redigo: connection closed")
|
||||
)
|
||||
|
||||
// Pool maintains a pool of connections. The application calls the Get method
|
||||
// to get a connection from the pool and the connection's Close method to
|
||||
// return the connection's resources to the pool.
|
||||
//
|
||||
// The following example shows how to use a pool in a web application. The
|
||||
// application creates a pool at application startup and makes it available to
|
||||
// request handlers using a global variable.
|
||||
//
|
||||
// func newPool(server, password string) *redis.Pool {
|
||||
// return &redis.Pool{
|
||||
// MaxIdle: 3,
|
||||
// IdleTimeout: 240 * time.Second,
|
||||
// Dial: func () (redis.Conn, error) {
|
||||
// c, err := redis.Dial("tcp", server)
|
||||
// if err != nil {
|
||||
// return nil, err
|
||||
// }
|
||||
// if _, err := c.Do("AUTH", password); err != nil {
|
||||
// c.Close()
|
||||
// return nil, err
|
||||
// }
|
||||
// return c, err
|
||||
// },
|
||||
// TestOnBorrow: func(c redis.Conn, t time.Time) error {
|
||||
// _, err := c.Do("PING")
|
||||
// return err
|
||||
// },
|
||||
// }
|
||||
// }
|
||||
//
|
||||
// var (
|
||||
// pool *redis.Pool
|
||||
// redisServer = flag.String("redisServer", ":6379", "")
|
||||
// redisPassword = flag.String("redisPassword", "", "")
|
||||
// )
|
||||
//
|
||||
// func main() {
|
||||
// flag.Parse()
|
||||
// pool = newPool(*redisServer, *redisPassword)
|
||||
// ...
|
||||
// }
|
||||
//
|
||||
// A request handler gets a connection from the pool and closes the connection
|
||||
// when the handler is done:
|
||||
//
|
||||
// func serveHome(w http.ResponseWriter, r *http.Request) {
|
||||
// conn := pool.Get()
|
||||
// defer conn.Close()
|
||||
// ....
|
||||
// }
|
||||
//
|
||||
type Pool struct {
|
||||
|
||||
// Dial is an application supplied function for creating and configuring a
|
||||
// connection
|
||||
Dial func() (Conn, error)
|
||||
|
||||
// TestOnBorrow is an optional application supplied function for checking
|
||||
// the health of an idle connection before the connection is used again by
|
||||
// the application. Argument t is the time that the connection was returned
|
||||
// to the pool. If the function returns an error, then the connection is
|
||||
// closed.
|
||||
TestOnBorrow func(c Conn, t time.Time) error
|
||||
|
||||
// Maximum number of idle connections in the pool.
|
||||
MaxIdle int
|
||||
|
||||
// Maximum number of connections allocated by the pool at a given time.
|
||||
// When zero, there is no limit on the number of connections in the pool.
|
||||
MaxActive int
|
||||
|
||||
// Close connections after remaining idle for this duration. If the value
|
||||
// is zero, then idle connections are not closed. Applications should set
|
||||
// the timeout to a value less than the server's timeout.
|
||||
IdleTimeout time.Duration
|
||||
|
||||
// If Wait is true and the pool is at the MaxIdle limit, then Get() waits
|
||||
// for a connection to be returned to the pool before returning.
|
||||
Wait bool
|
||||
|
||||
// mu protects fields defined below.
|
||||
mu sync.Mutex
|
||||
cond *sync.Cond
|
||||
closed bool
|
||||
active int
|
||||
|
||||
// Stack of idleConn with most recently used at the front.
|
||||
idle list.List
|
||||
}
|
||||
|
||||
type idleConn struct {
|
||||
c Conn
|
||||
t time.Time
|
||||
}
|
||||
|
||||
// NewPool creates a new pool. This function is deprecated. Applications should
|
||||
// initialize the Pool fields directly as shown in example.
|
||||
func NewPool(newFn func() (Conn, error), maxIdle int) *Pool {
|
||||
return &Pool{Dial: newFn, MaxIdle: maxIdle}
|
||||
}
|
||||
|
||||
// Get gets a connection. The application must close the returned connection.
|
||||
// This method always returns a valid connection so that applications can defer
|
||||
// error handling to the first use of the connection. If there is an error
|
||||
// getting an underlying connection, then the connection Err, Do, Send, Flush
|
||||
// and Receive methods return that error.
|
||||
func (p *Pool) Get() Conn {
|
||||
c, err := p.get()
|
||||
if err != nil {
|
||||
return errorConnection{err}
|
||||
}
|
||||
return &pooledConnection{p: p, c: c}
|
||||
}
|
||||
|
||||
// ActiveCount returns the number of active connections in the pool.
|
||||
func (p *Pool) ActiveCount() int {
|
||||
p.mu.Lock()
|
||||
active := p.active
|
||||
p.mu.Unlock()
|
||||
return active
|
||||
}
|
||||
|
||||
// Close releases the resources used by the pool.
|
||||
func (p *Pool) Close() error {
|
||||
p.mu.Lock()
|
||||
idle := p.idle
|
||||
p.idle.Init()
|
||||
p.closed = true
|
||||
p.active -= idle.Len()
|
||||
if p.cond != nil {
|
||||
p.cond.Broadcast()
|
||||
}
|
||||
p.mu.Unlock()
|
||||
for e := idle.Front(); e != nil; e = e.Next() {
|
||||
e.Value.(idleConn).c.Close()
|
||||
}
|
||||
return nil
|
||||
}
|
||||
|
||||
// release decrements the active count and signals waiters. The caller must
|
||||
// hold p.mu during the call.
|
||||
func (p *Pool) release() {
|
||||
p.active -= 1
|
||||
if p.cond != nil {
|
||||
p.cond.Signal()
|
||||
}
|
||||
}
|
||||
|
||||
// get prunes stale connections and returns a connection from the idle list or
|
||||
// creates a new connection.
|
||||
func (p *Pool) get() (Conn, error) {
|
||||
p.mu.Lock()
|
||||
|
||||
// Prune stale connections.
|
||||
|
||||
if timeout := p.IdleTimeout; timeout > 0 {
|
||||
for i, n := 0, p.idle.Len(); i < n; i++ {
|
||||
e := p.idle.Back()
|
||||
if e == nil {
|
||||
break
|
||||
}
|
||||
ic := e.Value.(idleConn)
|
||||
if ic.t.Add(timeout).After(nowFunc()) {
|
||||
break
|
||||
}
|
||||
p.idle.Remove(e)
|
||||
p.release()
|
||||
p.mu.Unlock()
|
||||
ic.c.Close()
|
||||
p.mu.Lock()
|
||||
}
|
||||
}
|
||||
|
||||
for {
|
||||
|
||||
// Get idle connection.
|
||||
|
||||
for i, n := 0, p.idle.Len(); i < n; i++ {
|
||||
e := p.idle.Front()
|
||||
if e == nil {
|
||||
break
|
||||
}
|
||||
ic := e.Value.(idleConn)
|
||||
p.idle.Remove(e)
|
||||
test := p.TestOnBorrow
|
||||
p.mu.Unlock()
|
||||
if test == nil || test(ic.c, ic.t) == nil {
|
||||
return ic.c, nil
|
||||
}
|
||||
ic.c.Close()
|
||||
p.mu.Lock()
|
||||
p.release()
|
||||
}
|
||||
|
||||
// Check for pool closed before dialing a new connection.
|
||||
|
||||
if p.closed {
|
||||
p.mu.Unlock()
|
||||
return nil, errors.New("redigo: get on closed pool")
|
||||
}
|
||||
|
||||
// Dial new connection if under limit.
|
||||
|
||||
if p.MaxActive == 0 || p.active < p.MaxActive {
|
||||
dial := p.Dial
|
||||
p.active += 1
|
||||
p.mu.Unlock()
|
||||
c, err := dial()
|
||||
if err != nil {
|
||||
p.mu.Lock()
|
||||
p.release()
|
||||
p.mu.Unlock()
|
||||
c = nil
|
||||
}
|
||||
return c, err
|
||||
}
|
||||
|
||||
if !p.Wait {
|
||||
p.mu.Unlock()
|
||||
return nil, ErrPoolExhausted
|
||||
}
|
||||
|
||||
if p.cond == nil {
|
||||
p.cond = sync.NewCond(&p.mu)
|
||||
}
|
||||
p.cond.Wait()
|
||||
}
|
||||
}
|
||||
|
||||
func (p *Pool) put(c Conn, forceClose bool) error {
|
||||
err := c.Err()
|
||||
p.mu.Lock()
|
||||
if !p.closed && err == nil && !forceClose {
|
||||
p.idle.PushFront(idleConn{t: nowFunc(), c: c})
|
||||
if p.idle.Len() > p.MaxIdle {
|
||||
c = p.idle.Remove(p.idle.Back()).(idleConn).c
|
||||
} else {
|
||||
c = nil
|
||||
}
|
||||
}
|
||||
|
||||
if c == nil {
|
||||
if p.cond != nil {
|
||||
p.cond.Signal()
|
||||
}
|
||||
p.mu.Unlock()
|
||||
return nil
|
||||
}
|
||||
|
||||
p.release()
|
||||
p.mu.Unlock()
|
||||
return c.Close()
|
||||
}
|
||||
|
||||
type pooledConnection struct {
|
||||
p *Pool
|
||||
c Conn
|
||||
state int
|
||||
}
|
||||
|
||||
var (
|
||||
sentinel []byte
|
||||
sentinelOnce sync.Once
|
||||
)
|
||||
|
||||
func initSentinel() {
|
||||
p := make([]byte, 64)
|
||||
if _, err := rand.Read(p); err == nil {
|
||||
sentinel = p
|
||||
} else {
|
||||
h := sha1.New()
|
||||
io.WriteString(h, "Oops, rand failed. Use time instead.")
|
||||
io.WriteString(h, strconv.FormatInt(time.Now().UnixNano(), 10))
|
||||
sentinel = h.Sum(nil)
|
||||
}
|
||||
}
|
||||
|
||||
func (pc *pooledConnection) Close() error {
|
||||
c := pc.c
|
||||
if _, ok := c.(errorConnection); ok {
|
||||
return nil
|
||||
}
|
||||
pc.c = errorConnection{errConnClosed}
|
||||
|
||||
if pc.state&internal.MultiState != 0 {
|
||||
c.Send("DISCARD")
|
||||
pc.state &^= (internal.MultiState | internal.WatchState)
|
||||
} else if pc.state&internal.WatchState != 0 {
|
||||
c.Send("UNWATCH")
|
||||
pc.state &^= internal.WatchState
|
||||
}
|
||||
if pc.state&internal.SubscribeState != 0 {
|
||||
c.Send("UNSUBSCRIBE")
|
||||
c.Send("PUNSUBSCRIBE")
|
||||
// To detect the end of the message stream, ask the server to echo
|
||||
// a sentinel value and read until we see that value.
|
||||
sentinelOnce.Do(initSentinel)
|
||||
c.Send("ECHO", sentinel)
|
||||
c.Flush()
|
||||
for {
|
||||
p, err := c.Receive()
|
||||
if err != nil {
|
||||
break
|
||||
}
|
||||
if p, ok := p.([]byte); ok && bytes.Equal(p, sentinel) {
|
||||
pc.state &^= internal.SubscribeState
|
||||
break
|
||||
}
|
||||
}
|
||||
}
|
||||
c.Do("")
|
||||
pc.p.put(c, pc.state != 0)
|
||||
return nil
|
||||
}
|
||||
|
||||
func (pc *pooledConnection) Err() error {
|
||||
return pc.c.Err()
|
||||
}
|
||||
|
||||
func (pc *pooledConnection) Do(commandName string, args ...interface{}) (reply interface{}, err error) {
|
||||
ci := internal.LookupCommandInfo(commandName)
|
||||
pc.state = (pc.state | ci.Set) &^ ci.Clear
|
||||
return pc.c.Do(commandName, args...)
|
||||
}
|
||||
|
||||
func (pc *pooledConnection) Send(commandName string, args ...interface{}) error {
|
||||
ci := internal.LookupCommandInfo(commandName)
|
||||
pc.state = (pc.state | ci.Set) &^ ci.Clear
|
||||
return pc.c.Send(commandName, args...)
|
||||
}
|
||||
|
||||
func (pc *pooledConnection) Flush() error {
|
||||
return pc.c.Flush()
|
||||
}
|
||||
|
||||
func (pc *pooledConnection) Receive() (reply interface{}, err error) {
|
||||
return pc.c.Receive()
|
||||
}
|
||||
|
||||
type errorConnection struct{ err error }
|
||||
|
||||
func (ec errorConnection) Do(string, ...interface{}) (interface{}, error) { return nil, ec.err }
|
||||
func (ec errorConnection) Send(string, ...interface{}) error { return ec.err }
|
||||
func (ec errorConnection) Err() error { return ec.err }
|
||||
func (ec errorConnection) Close() error { return ec.err }
|
||||
func (ec errorConnection) Flush() error { return ec.err }
|
||||
func (ec errorConnection) Receive() (interface{}, error) { return nil, ec.err }
|
|
@ -1,44 +0,0 @@
|
|||
// Copyright 2012 Gary Burd
|
||||
//
|
||||
// Licensed under the Apache License, Version 2.0 (the "License"): you may
|
||||
// not use this file except in compliance with the License. You may obtain
|
||||
// a copy of the License at
|
||||
//
|
||||
// http://www.apache.org/licenses/LICENSE-2.0
|
||||
//
|
||||
// Unless required by applicable law or agreed to in writing, software
|
||||
// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
|
||||
// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
|
||||
// License for the specific language governing permissions and limitations
|
||||
// under the License.
|
||||
|
||||
package redis
|
||||
|
||||
// Error represents an error returned in a command reply.
|
||||
type Error string
|
||||
|
||||
func (err Error) Error() string { return string(err) }
|
||||
|
||||
// Conn represents a connection to a Redis server.
|
||||
type Conn interface {
|
||||
// Close closes the connection.
|
||||
Close() error
|
||||
|
||||
// Err returns a non-nil value if the connection is broken. The returned
|
||||
// value is either the first non-nil value returned from the underlying
|
||||
// network connection or a protocol parsing error. Applications should
|
||||
// close broken connections.
|
||||
Err() error
|
||||
|
||||
// Do sends a command to the server and returns the received reply.
|
||||
Do(commandName string, args ...interface{}) (reply interface{}, err error)
|
||||
|
||||
// Send writes the command to the client's output buffer.
|
||||
Send(commandName string, args ...interface{}) error
|
||||
|
||||
// Flush flushes the output buffer to the Redis server.
|
||||
Flush() error
|
||||
|
||||
// Receive receives a single reply from the Redis server
|
||||
Receive() (reply interface{}, err error)
|
||||
}
|
|
@ -1,312 +0,0 @@
|
|||
// Copyright 2012 Gary Burd
|
||||
//
|
||||
// Licensed under the Apache License, Version 2.0 (the "License"): you may
|
||||
// not use this file except in compliance with the License. You may obtain
|
||||
// a copy of the License at
|
||||
//
|
||||
// http://www.apache.org/licenses/LICENSE-2.0
|
||||
//
|
||||
// Unless required by applicable law or agreed to in writing, software
|
||||
// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
|
||||
// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
|
||||
// License for the specific language governing permissions and limitations
|
||||
// under the License.
|
||||
|
||||
package redis
|
||||
|
||||
import (
|
||||
"errors"
|
||||
"fmt"
|
||||
"strconv"
|
||||
)
|
||||
|
||||
// ErrNil indicates that a reply value is nil.
|
||||
var ErrNil = errors.New("redigo: nil returned")
|
||||
|
||||
// Int is a helper that converts a command reply to an integer. If err is not
|
||||
// equal to nil, then Int returns 0, err. Otherwise, Int converts the
|
||||
// reply to an int as follows:
|
||||
//
|
||||
// Reply type Result
|
||||
// integer int(reply), nil
|
||||
// bulk string parsed reply, nil
|
||||
// nil 0, ErrNil
|
||||
// other 0, error
|
||||
func Int(reply interface{}, err error) (int, error) {
|
||||
if err != nil {
|
||||
return 0, err
|
||||
}
|
||||
switch reply := reply.(type) {
|
||||
case int64:
|
||||
x := int(reply)
|
||||
if int64(x) != reply {
|
||||
return 0, strconv.ErrRange
|
||||
}
|
||||
return x, nil
|
||||
case []byte:
|
||||
n, err := strconv.ParseInt(string(reply), 10, 0)
|
||||
return int(n), err
|
||||
case nil:
|
||||
return 0, ErrNil
|
||||
case Error:
|
||||
return 0, reply
|
||||
}
|
||||
return 0, fmt.Errorf("redigo: unexpected type for Int, got type %T", reply)
|
||||
}
|
||||
|
||||
// Int64 is a helper that converts a command reply to 64 bit integer. If err is
|
||||
// not equal to nil, then Int returns 0, err. Otherwise, Int64 converts the
|
||||
// reply to an int64 as follows:
|
||||
//
|
||||
// Reply type Result
|
||||
// integer reply, nil
|
||||
// bulk string parsed reply, nil
|
||||
// nil 0, ErrNil
|
||||
// other 0, error
|
||||
func Int64(reply interface{}, err error) (int64, error) {
|
||||
if err != nil {
|
||||
return 0, err
|
||||
}
|
||||
switch reply := reply.(type) {
|
||||
case int64:
|
||||
return reply, nil
|
||||
case []byte:
|
||||
n, err := strconv.ParseInt(string(reply), 10, 64)
|
||||
return n, err
|
||||
case nil:
|
||||
return 0, ErrNil
|
||||
case Error:
|
||||
return 0, reply
|
||||
}
|
||||
return 0, fmt.Errorf("redigo: unexpected type for Int64, got type %T", reply)
|
||||
}
|
||||
|
||||
var errNegativeInt = errors.New("redigo: unexpected value for Uint64")
|
||||
|
||||
// Uint64 is a helper that converts a command reply to 64 bit integer. If err is
|
||||
// not equal to nil, then Int returns 0, err. Otherwise, Int64 converts the
|
||||
// reply to an int64 as follows:
|
||||
//
|
||||
// Reply type Result
|
||||
// integer reply, nil
|
||||
// bulk string parsed reply, nil
|
||||
// nil 0, ErrNil
|
||||
// other 0, error
|
||||
func Uint64(reply interface{}, err error) (uint64, error) {
|
||||
if err != nil {
|
||||
return 0, err
|
||||
}
|
||||
switch reply := reply.(type) {
|
||||
case int64:
|
||||
if reply < 0 {
|
||||
return 0, errNegativeInt
|
||||
}
|
||||
return uint64(reply), nil
|
||||
case []byte:
|
||||
n, err := strconv.ParseUint(string(reply), 10, 64)
|
||||
return n, err
|
||||
case nil:
|
||||
return 0, ErrNil
|
||||
case Error:
|
||||
return 0, reply
|
||||
}
|
||||
return 0, fmt.Errorf("redigo: unexpected type for Uint64, got type %T", reply)
|
||||
}
|
||||
|
||||
// Float64 is a helper that converts a command reply to 64 bit float. If err is
|
||||
// not equal to nil, then Float64 returns 0, err. Otherwise, Float64 converts
|
||||
// the reply to an int as follows:
|
||||
//
|
||||
// Reply type Result
|
||||
// bulk string parsed reply, nil
|
||||
// nil 0, ErrNil
|
||||
// other 0, error
|
||||
func Float64(reply interface{}, err error) (float64, error) {
|
||||
if err != nil {
|
||||
return 0, err
|
||||
}
|
||||
switch reply := reply.(type) {
|
||||
case []byte:
|
||||
n, err := strconv.ParseFloat(string(reply), 64)
|
||||
return n, err
|
||||
case nil:
|
||||
return 0, ErrNil
|
||||
case Error:
|
||||
return 0, reply
|
||||
}
|
||||
return 0, fmt.Errorf("redigo: unexpected type for Float64, got type %T", reply)
|
||||
}
|
||||
|
||||
// String is a helper that converts a command reply to a string. If err is not
|
||||
// equal to nil, then String returns "", err. Otherwise String converts the
|
||||
// reply to a string as follows:
|
||||
//
|
||||
// Reply type Result
|
||||
// bulk string string(reply), nil
|
||||
// simple string reply, nil
|
||||
// nil "", ErrNil
|
||||
// other "", error
|
||||
func String(reply interface{}, err error) (string, error) {
|
||||
if err != nil {
|
||||
return "", err
|
||||
}
|
||||
switch reply := reply.(type) {
|
||||
case []byte:
|
||||
return string(reply), nil
|
||||
case string:
|
||||
return reply, nil
|
||||
case nil:
|
||||
return "", ErrNil
|
||||
case Error:
|
||||
return "", reply
|
||||
}
|
||||
return "", fmt.Errorf("redigo: unexpected type for String, got type %T", reply)
|
||||
}
|
||||
|
||||
// Bytes is a helper that converts a command reply to a slice of bytes. If err
|
||||
// is not equal to nil, then Bytes returns nil, err. Otherwise Bytes converts
|
||||
// the reply to a slice of bytes as follows:
|
||||
//
|
||||
// Reply type Result
|
||||
// bulk string reply, nil
|
||||
// simple string []byte(reply), nil
|
||||
// nil nil, ErrNil
|
||||
// other nil, error
|
||||
func Bytes(reply interface{}, err error) ([]byte, error) {
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
switch reply := reply.(type) {
|
||||
case []byte:
|
||||
return reply, nil
|
||||
case string:
|
||||
return []byte(reply), nil
|
||||
case nil:
|
||||
return nil, ErrNil
|
||||
case Error:
|
||||
return nil, reply
|
||||
}
|
||||
return nil, fmt.Errorf("redigo: unexpected type for Bytes, got type %T", reply)
|
||||
}
|
||||
|
||||
// Bool is a helper that converts a command reply to a boolean. If err is not
|
||||
// equal to nil, then Bool returns false, err. Otherwise Bool converts the
|
||||
// reply to boolean as follows:
|
||||
//
|
||||
// Reply type Result
|
||||
// integer value != 0, nil
|
||||
// bulk string strconv.ParseBool(reply)
|
||||
// nil false, ErrNil
|
||||
// other false, error
|
||||
func Bool(reply interface{}, err error) (bool, error) {
|
||||
if err != nil {
|
||||
return false, err
|
||||
}
|
||||
switch reply := reply.(type) {
|
||||
case int64:
|
||||
return reply != 0, nil
|
||||
case []byte:
|
||||
return strconv.ParseBool(string(reply))
|
||||
case nil:
|
||||
return false, ErrNil
|
||||
case Error:
|
||||
return false, reply
|
||||
}
|
||||
return false, fmt.Errorf("redigo: unexpected type for Bool, got type %T", reply)
|
||||
}
|
||||
|
||||
// MultiBulk is deprecated. Use Values.
|
||||
func MultiBulk(reply interface{}, err error) ([]interface{}, error) { return Values(reply, err) }
|
||||
|
||||
// Values is a helper that converts an array command reply to a []interface{}.
|
||||
// If err is not equal to nil, then Values returns nil, err. Otherwise, Values
|
||||
// converts the reply as follows:
|
||||
//
|
||||
// Reply type Result
|
||||
// array reply, nil
|
||||
// nil nil, ErrNil
|
||||
// other nil, error
|
||||
func Values(reply interface{}, err error) ([]interface{}, error) {
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
switch reply := reply.(type) {
|
||||
case []interface{}:
|
||||
return reply, nil
|
||||
case nil:
|
||||
return nil, ErrNil
|
||||
case Error:
|
||||
return nil, reply
|
||||
}
|
||||
return nil, fmt.Errorf("redigo: unexpected type for Values, got type %T", reply)
|
||||
}
|
||||
|
||||
// Strings is a helper that converts an array command reply to a []string. If
|
||||
// err is not equal to nil, then Strings returns nil, err. Nil array items are
|
||||
// converted to "" in the output slice. Strings returns an error if an array
|
||||
// item is not a bulk string or nil.
|
||||
func Strings(reply interface{}, err error) ([]string, error) {
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
switch reply := reply.(type) {
|
||||
case []interface{}:
|
||||
result := make([]string, len(reply))
|
||||
for i := range reply {
|
||||
if reply[i] == nil {
|
||||
continue
|
||||
}
|
||||
p, ok := reply[i].([]byte)
|
||||
if !ok {
|
||||
return nil, fmt.Errorf("redigo: unexpected element type for Strings, got type %T", reply[i])
|
||||
}
|
||||
result[i] = string(p)
|
||||
}
|
||||
return result, nil
|
||||
case nil:
|
||||
return nil, ErrNil
|
||||
case Error:
|
||||
return nil, reply
|
||||
}
|
||||
return nil, fmt.Errorf("redigo: unexpected type for Strings, got type %T", reply)
|
||||
}
|
||||
|
||||
// Ints is a helper that converts an array command reply to a []int. If
|
||||
// err is not equal to nil, then Ints returns nil, err.
|
||||
func Ints(reply interface{}, err error) ([]int, error) {
|
||||
var ints []int
|
||||
if reply == nil {
|
||||
return ints, ErrNil
|
||||
}
|
||||
values, err := Values(reply, err)
|
||||
if err != nil {
|
||||
return ints, err
|
||||
}
|
||||
if err := ScanSlice(values, &ints); err != nil {
|
||||
return ints, err
|
||||
}
|
||||
return ints, nil
|
||||
}
|
||||
|
||||
// StringMap is a helper that converts an array of strings (alternating key, value)
|
||||
// into a map[string]string. The HGETALL and CONFIG GET commands return replies in this format.
|
||||
// Requires an even number of values in result.
|
||||
func StringMap(result interface{}, err error) (map[string]string, error) {
|
||||
values, err := Values(result, err)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
if len(values)%2 != 0 {
|
||||
return nil, errors.New("redigo: StringMap expects even number of values result")
|
||||
}
|
||||
m := make(map[string]string, len(values)/2)
|
||||
for i := 0; i < len(values); i += 2 {
|
||||
key, okKey := values[i].([]byte)
|
||||
value, okValue := values[i+1].([]byte)
|
||||
if !okKey || !okValue {
|
||||
return nil, errors.New("redigo: ScanMap key not a bulk string value")
|
||||
}
|
||||
m[string(key)] = string(value)
|
||||
}
|
||||
return m, nil
|
||||
}
|
|
@ -0,0 +1,175 @@
|
|||
|
||||
Apache License
|
||||
Version 2.0, January 2004
|
||||
http://www.apache.org/licenses/
|
||||
|
||||
TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
|
||||
|
||||
1. Definitions.
|
||||
|
||||
"License" shall mean the terms and conditions for use, reproduction,
|
||||
and distribution as defined by Sections 1 through 9 of this document.
|
||||
|
||||
"Licensor" shall mean the copyright owner or entity authorized by
|
||||
the copyright owner that is granting the License.
|
||||
|
||||
"Legal Entity" shall mean the union of the acting entity and all
|
||||
other entities that control, are controlled by, or are under common
|
||||
control with that entity. For the purposes of this definition,
|
||||
"control" means (i) the power, direct or indirect, to cause the
|
||||
direction or management of such entity, whether by contract or
|
||||
otherwise, or (ii) ownership of fifty percent (50%) or more of the
|
||||
outstanding shares, or (iii) beneficial ownership of such entity.
|
||||
|
||||
"You" (or "Your") shall mean an individual or Legal Entity
|
||||
exercising permissions granted by this License.
|
||||
|
||||
"Source" form shall mean the preferred form for making modifications,
|
||||
including but not limited to software source code, documentation
|
||||
source, and configuration files.
|
||||
|
||||
"Object" form shall mean any form resulting from mechanical
|
||||
transformation or translation of a Source form, including but
|
||||
not limited to compiled object code, generated documentation,
|
||||
and conversions to other media types.
|
||||
|
||||
"Work" shall mean the work of authorship, whether in Source or
|
||||
Object form, made available under the License, as indicated by a
|
||||
copyright notice that is included in or attached to the work
|
||||
(an example is provided in the Appendix below).
|
||||
|
||||
"Derivative Works" shall mean any work, whether in Source or Object
|
||||
form, that is based on (or derived from) the Work and for which the
|
||||
editorial revisions, annotations, elaborations, or other modifications
|
||||
represent, as a whole, an original work of authorship. For the purposes
|
||||
of this License, Derivative Works shall not include works that remain
|
||||
separable from, or merely link (or bind by name) to the interfaces of,
|
||||
the Work and Derivative Works thereof.
|
||||
|
||||
"Contribution" shall mean any work of authorship, including
|
||||
the original version of the Work and any modifications or additions
|
||||
to that Work or Derivative Works thereof, that is intentionally
|
||||
submitted to Licensor for inclusion in the Work by the copyright owner
|
||||
or by an individual or Legal Entity authorized to submit on behalf of
|
||||
the copyright owner. For the purposes of this definition, "submitted"
|
||||
means any form of electronic, verbal, or written communication sent
|
||||
to the Licensor or its representatives, including but not limited to
|
||||
communication on electronic mailing lists, source code control systems,
|
||||
and issue tracking systems that are managed by, or on behalf of, the
|
||||
Licensor for the purpose of discussing and improving the Work, but
|
||||
excluding communication that is conspicuously marked or otherwise
|
||||
designated in writing by the copyright owner as "Not a Contribution."
|
||||
|
||||
"Contributor" shall mean Licensor and any individual or Legal Entity
|
||||
on behalf of whom a Contribution has been received by Licensor and
|
||||
subsequently incorporated within the Work.
|
||||
|
||||
2. Grant of Copyright License. Subject to the terms and conditions of
|
||||
this License, each Contributor hereby grants to You a perpetual,
|
||||
worldwide, non-exclusive, no-charge, royalty-free, irrevocable
|
||||
copyright license to reproduce, prepare Derivative Works of,
|
||||
publicly display, publicly perform, sublicense, and distribute the
|
||||
Work and such Derivative Works in Source or Object form.
|
||||
|
||||
3. Grant of Patent License. Subject to the terms and conditions of
|
||||
this License, each Contributor hereby grants to You a perpetual,
|
||||
worldwide, non-exclusive, no-charge, royalty-free, irrevocable
|
||||
(except as stated in this section) patent license to make, have made,
|
||||
use, offer to sell, sell, import, and otherwise transfer the Work,
|
||||
where such license applies only to those patent claims licensable
|
||||
by such Contributor that are necessarily infringed by their
|
||||
Contribution(s) alone or by combination of their Contribution(s)
|
||||
with the Work to which such Contribution(s) was submitted. If You
|
||||
institute patent litigation against any entity (including a
|
||||
cross-claim or counterclaim in a lawsuit) alleging that the Work
|
||||
or a Contribution incorporated within the Work constitutes direct
|
||||
or contributory patent infringement, then any patent licenses
|
||||
granted to You under this License for that Work shall terminate
|
||||
as of the date such litigation is filed.
|
||||
|
||||
4. Redistribution. You may reproduce and distribute copies of the
|
||||
Work or Derivative Works thereof in any medium, with or without
|
||||
modifications, and in Source or Object form, provided that You
|
||||
meet the following conditions:
|
||||
|
||||
(a) You must give any other recipients of the Work or
|
||||
Derivative Works a copy of this License; and
|
||||
|
||||
(b) You must cause any modified files to carry prominent notices
|
||||
stating that You changed the files; and
|
||||
|
||||
(c) You must retain, in the Source form of any Derivative Works
|
||||
that You distribute, all copyright, patent, trademark, and
|
||||
attribution notices from the Source form of the Work,
|
||||
excluding those notices that do not pertain to any part of
|
||||
the Derivative Works; and
|
||||
|
||||
(d) If the Work includes a "NOTICE" text file as part of its
|
||||
distribution, then any Derivative Works that You distribute must
|
||||
include a readable copy of the attribution notices contained
|
||||
within such NOTICE file, excluding those notices that do not
|
||||
pertain to any part of the Derivative Works, in at least one
|
||||
of the following places: within a NOTICE text file distributed
|
||||
as part of the Derivative Works; within the Source form or
|
||||
documentation, if provided along with the Derivative Works; or,
|
||||
within a display generated by the Derivative Works, if and
|
||||
wherever such third-party notices normally appear. The contents
|
||||
of the NOTICE file are for informational purposes only and
|
||||
do not modify the License. You may add Your own attribution
|
||||
notices within Derivative Works that You distribute, alongside
|
||||
or as an addendum to the NOTICE text from the Work, provided
|
||||
that such additional attribution notices cannot be construed
|
||||
as modifying the License.
|
||||
|
||||
You may add Your own copyright statement to Your modifications and
|
||||
may provide additional or different license terms and conditions
|
||||
for use, reproduction, or distribution of Your modifications, or
|
||||
for any such Derivative Works as a whole, provided Your use,
|
||||
reproduction, and distribution of the Work otherwise complies with
|
||||
the conditions stated in this License.
|
||||
|
||||
5. Submission of Contributions. Unless You explicitly state otherwise,
|
||||
any Contribution intentionally submitted for inclusion in the Work
|
||||
by You to the Licensor shall be under the terms and conditions of
|
||||
this License, without any additional terms or conditions.
|
||||
Notwithstanding the above, nothing herein shall supersede or modify
|
||||
the terms of any separate license agreement you may have executed
|
||||
with Licensor regarding such Contributions.
|
||||
|
||||
6. Trademarks. This License does not grant permission to use the trade
|
||||
names, trademarks, service marks, or product names of the Licensor,
|
||||
except as required for reasonable and customary use in describing the
|
||||
origin of the Work and reproducing the content of the NOTICE file.
|
||||
|
||||
7. Disclaimer of Warranty. Unless required by applicable law or
|
||||
agreed to in writing, Licensor provides the Work (and each
|
||||
Contributor provides its Contributions) on an "AS IS" BASIS,
|
||||
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
|
||||
implied, including, without limitation, any warranties or conditions
|
||||
of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
|
||||
PARTICULAR PURPOSE. You are solely responsible for determining the
|
||||
appropriateness of using or redistributing the Work and assume any
|
||||
risks associated with Your exercise of permissions under this License.
|
||||
|
||||
8. Limitation of Liability. In no event and under no legal theory,
|
||||
whether in tort (including negligence), contract, or otherwise,
|
||||
unless required by applicable law (such as deliberate and grossly
|
||||
negligent acts) or agreed to in writing, shall any Contributor be
|
||||
liable to You for damages, including any direct, indirect, special,
|
||||
incidental, or consequential damages of any character arising as a
|
||||
result of this License or out of the use or inability to use the
|
||||
Work (including but not limited to damages for loss of goodwill,
|
||||
work stoppage, computer failure or malfunction, or any and all
|
||||
other commercial damages or losses), even if such Contributor
|
||||
has been advised of the possibility of such damages.
|
||||
|
||||
9. Accepting Warranty or Additional Liability. While redistributing
|
||||
the Work or Derivative Works thereof, You may choose to offer,
|
||||
and charge a fee for, acceptance of support, warranty, indemnity,
|
||||
or other liability obligations and/or rights consistent with this
|
||||
License. However, in accepting such obligations, You may act only
|
||||
on Your own behalf and on Your sole responsibility, not on behalf
|
||||
of any other Contributor, and only if You agree to indemnify,
|
||||
defend, and hold each Contributor harmless for any liability
|
||||
incurred by, or claims asserted against, such Contributor by reason
|
||||
of your accepting any such warranty or additional liability.
|
|
@ -0,0 +1,55 @@
|
|||
// Copyright 2014 Gary Burd
|
||||
//
|
||||
// Licensed under the Apache License, Version 2.0 (the "License"): you may
|
||||
// not use this file except in compliance with the License. You may obtain
|
||||
// a copy of the License at
|
||||
//
|
||||
// http://www.apache.org/licenses/LICENSE-2.0
|
||||
//
|
||||
// Unless required by applicable law or agreed to in writing, software
|
||||
// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
|
||||
// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
|
||||
// License for the specific language governing permissions and limitations
|
||||
// under the License.
|
||||
|
||||
package redis
|
||||
|
||||
import (
|
||||
"strings"
|
||||
)
|
||||
|
||||
const (
|
||||
connectionWatchState = 1 << iota
|
||||
connectionMultiState
|
||||
connectionSubscribeState
|
||||
connectionMonitorState
|
||||
)
|
||||
|
||||
type commandInfo struct {
|
||||
// Set or Clear these states on connection.
|
||||
Set, Clear int
|
||||
}
|
||||
|
||||
var commandInfos = map[string]commandInfo{
|
||||
"WATCH": {Set: connectionWatchState},
|
||||
"UNWATCH": {Clear: connectionWatchState},
|
||||
"MULTI": {Set: connectionMultiState},
|
||||
"EXEC": {Clear: connectionWatchState | connectionMultiState},
|
||||
"DISCARD": {Clear: connectionWatchState | connectionMultiState},
|
||||
"PSUBSCRIBE": {Set: connectionSubscribeState},
|
||||
"SUBSCRIBE": {Set: connectionSubscribeState},
|
||||
"MONITOR": {Set: connectionMonitorState},
|
||||
}
|
||||
|
||||
func init() {
|
||||
for n, ci := range commandInfos {
|
||||
commandInfos[strings.ToLower(n)] = ci
|
||||
}
|
||||
}
|
||||
|
||||
func lookupCommandInfo(commandName string) commandInfo {
|
||||
if ci, ok := commandInfos[commandName]; ok {
|
||||
return ci
|
||||
}
|
||||
return commandInfos[strings.ToUpper(commandName)]
|
||||
}
|
|
@ -0,0 +1,736 @@
|
|||
// Copyright 2012 Gary Burd
|
||||
//
|
||||
// Licensed under the Apache License, Version 2.0 (the "License"): you may
|
||||
// not use this file except in compliance with the License. You may obtain
|
||||
// a copy of the License at
|
||||
//
|
||||
// http://www.apache.org/licenses/LICENSE-2.0
|
||||
//
|
||||
// Unless required by applicable law or agreed to in writing, software
|
||||
// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
|
||||
// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
|
||||
// License for the specific language governing permissions and limitations
|
||||
// under the License.
|
||||
|
||||
package redis
|
||||
|
||||
import (
|
||||
"bufio"
|
||||
"bytes"
|
||||
"context"
|
||||
"crypto/tls"
|
||||
"errors"
|
||||
"fmt"
|
||||
"io"
|
||||
"net"
|
||||
"net/url"
|
||||
"regexp"
|
||||
"strconv"
|
||||
"sync"
|
||||
"time"
|
||||
)
|
||||
|
||||
var (
|
||||
_ ConnWithTimeout = (*conn)(nil)
|
||||
)
|
||||
|
||||
// conn is the low-level implementation of Conn
|
||||
type conn struct {
|
||||
// Shared
|
||||
mu sync.Mutex
|
||||
pending int
|
||||
err error
|
||||
conn net.Conn
|
||||
|
||||
// Read
|
||||
readTimeout time.Duration
|
||||
br *bufio.Reader
|
||||
|
||||
// Write
|
||||
writeTimeout time.Duration
|
||||
bw *bufio.Writer
|
||||
|
||||
// Scratch space for formatting argument length.
|
||||
// '*' or '$', length, "\r\n"
|
||||
lenScratch [32]byte
|
||||
|
||||
// Scratch space for formatting integers and floats.
|
||||
numScratch [40]byte
|
||||
}
|
||||
|
||||
// DialTimeout acts like Dial but takes timeouts for establishing the
|
||||
// connection to the server, writing a command and reading a reply.
|
||||
//
|
||||
// Deprecated: Use Dial with options instead.
|
||||
func DialTimeout(network, address string, connectTimeout, readTimeout, writeTimeout time.Duration) (Conn, error) {
|
||||
return Dial(network, address,
|
||||
DialConnectTimeout(connectTimeout),
|
||||
DialReadTimeout(readTimeout),
|
||||
DialWriteTimeout(writeTimeout))
|
||||
}
|
||||
|
||||
// DialOption specifies an option for dialing a Redis server.
|
||||
type DialOption struct {
|
||||
f func(*dialOptions)
|
||||
}
|
||||
|
||||
type dialOptions struct {
|
||||
readTimeout time.Duration
|
||||
writeTimeout time.Duration
|
||||
dialer *net.Dialer
|
||||
dialContext func(ctx context.Context, network, addr string) (net.Conn, error)
|
||||
db int
|
||||
username string
|
||||
password string
|
||||
clientName string
|
||||
useTLS bool
|
||||
skipVerify bool
|
||||
tlsConfig *tls.Config
|
||||
}
|
||||
|
||||
// DialReadTimeout specifies the timeout for reading a single command reply.
|
||||
func DialReadTimeout(d time.Duration) DialOption {
|
||||
return DialOption{func(do *dialOptions) {
|
||||
do.readTimeout = d
|
||||
}}
|
||||
}
|
||||
|
||||
// DialWriteTimeout specifies the timeout for writing a single command.
|
||||
func DialWriteTimeout(d time.Duration) DialOption {
|
||||
return DialOption{func(do *dialOptions) {
|
||||
do.writeTimeout = d
|
||||
}}
|
||||
}
|
||||
|
||||
// DialConnectTimeout specifies the timeout for connecting to the Redis server when
|
||||
// no DialNetDial option is specified.
|
||||
func DialConnectTimeout(d time.Duration) DialOption {
|
||||
return DialOption{func(do *dialOptions) {
|
||||
do.dialer.Timeout = d
|
||||
}}
|
||||
}
|
||||
|
||||
// DialKeepAlive specifies the keep-alive period for TCP connections to the Redis server
|
||||
// when no DialNetDial option is specified.
|
||||
// If zero, keep-alives are not enabled. If no DialKeepAlive option is specified then
|
||||
// the default of 5 minutes is used to ensure that half-closed TCP sessions are detected.
|
||||
func DialKeepAlive(d time.Duration) DialOption {
|
||||
return DialOption{func(do *dialOptions) {
|
||||
do.dialer.KeepAlive = d
|
||||
}}
|
||||
}
|
||||
|
||||
// DialNetDial specifies a custom dial function for creating TCP
|
||||
// connections, otherwise a net.Dialer customized via the other options is used.
|
||||
// DialNetDial overrides DialConnectTimeout and DialKeepAlive.
|
||||
func DialNetDial(dial func(network, addr string) (net.Conn, error)) DialOption {
|
||||
return DialOption{func(do *dialOptions) {
|
||||
do.dialContext = func(ctx context.Context, network, addr string) (net.Conn, error) {
|
||||
return dial(network, addr)
|
||||
}
|
||||
}}
|
||||
}
|
||||
|
||||
// DialContextFunc specifies a custom dial function with context for creating TCP
|
||||
// connections, otherwise a net.Dialer customized via the other options is used.
|
||||
// DialContextFunc overrides DialConnectTimeout and DialKeepAlive.
|
||||
func DialContextFunc(f func(ctx context.Context, network, addr string) (net.Conn, error)) DialOption {
|
||||
return DialOption{func(do *dialOptions) {
|
||||
do.dialContext = f
|
||||
}}
|
||||
}
|
||||
|
||||
// DialDatabase specifies the database to select when dialing a connection.
|
||||
func DialDatabase(db int) DialOption {
|
||||
return DialOption{func(do *dialOptions) {
|
||||
do.db = db
|
||||
}}
|
||||
}
|
||||
|
||||
// DialPassword specifies the password to use when connecting to
|
||||
// the Redis server.
|
||||
func DialPassword(password string) DialOption {
|
||||
return DialOption{func(do *dialOptions) {
|
||||
do.password = password
|
||||
}}
|
||||
}
|
||||
|
||||
// DialUsername specifies the username to use when connecting to
|
||||
// the Redis server when Redis ACLs are used.
|
||||
func DialUsername(username string) DialOption {
|
||||
return DialOption{func(do *dialOptions) {
|
||||
do.username = username
|
||||
}}
|
||||
}
|
||||
|
||||
// DialClientName specifies a client name to be used
|
||||
// by the Redis server connection.
|
||||
func DialClientName(name string) DialOption {
|
||||
return DialOption{func(do *dialOptions) {
|
||||
do.clientName = name
|
||||
}}
|
||||
}
|
||||
|
||||
// DialTLSConfig specifies the config to use when a TLS connection is dialed.
|
||||
// Has no effect when not dialing a TLS connection.
|
||||
func DialTLSConfig(c *tls.Config) DialOption {
|
||||
return DialOption{func(do *dialOptions) {
|
||||
do.tlsConfig = c
|
||||
}}
|
||||
}
|
||||
|
||||
// DialTLSSkipVerify disables server name verification when connecting over
|
||||
// TLS. Has no effect when not dialing a TLS connection.
|
||||
func DialTLSSkipVerify(skip bool) DialOption {
|
||||
return DialOption{func(do *dialOptions) {
|
||||
do.skipVerify = skip
|
||||
}}
|
||||
}
|
||||
|
||||
// DialUseTLS specifies whether TLS should be used when connecting to the
|
||||
// server. This option is ignore by DialURL.
|
||||
func DialUseTLS(useTLS bool) DialOption {
|
||||
return DialOption{func(do *dialOptions) {
|
||||
do.useTLS = useTLS
|
||||
}}
|
||||
}
|
||||
|
||||
// Dial connects to the Redis server at the given network and
|
||||
// address using the specified options.
|
||||
func Dial(network, address string, options ...DialOption) (Conn, error) {
|
||||
return DialContext(context.Background(), network, address, options...)
|
||||
}
|
||||
|
||||
// DialContext connects to the Redis server at the given network and
|
||||
// address using the specified options and context.
|
||||
func DialContext(ctx context.Context, network, address string, options ...DialOption) (Conn, error) {
|
||||
do := dialOptions{
|
||||
dialer: &net.Dialer{
|
||||
KeepAlive: time.Minute * 5,
|
||||
},
|
||||
}
|
||||
for _, option := range options {
|
||||
option.f(&do)
|
||||
}
|
||||
if do.dialContext == nil {
|
||||
do.dialContext = do.dialer.DialContext
|
||||
}
|
||||
|
||||
netConn, err := do.dialContext(ctx, network, address)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
|
||||
if do.useTLS {
|
||||
var tlsConfig *tls.Config
|
||||
if do.tlsConfig == nil {
|
||||
tlsConfig = &tls.Config{InsecureSkipVerify: do.skipVerify}
|
||||
} else {
|
||||
tlsConfig = cloneTLSConfig(do.tlsConfig)
|
||||
}
|
||||
if tlsConfig.ServerName == "" {
|
||||
host, _, err := net.SplitHostPort(address)
|
||||
if err != nil {
|
||||
netConn.Close()
|
||||
return nil, err
|
||||
}
|
||||
tlsConfig.ServerName = host
|
||||
}
|
||||
|
||||
tlsConn := tls.Client(netConn, tlsConfig)
|
||||
if err := tlsConn.Handshake(); err != nil {
|
||||
netConn.Close()
|
||||
return nil, err
|
||||
}
|
||||
netConn = tlsConn
|
||||
}
|
||||
|
||||
c := &conn{
|
||||
conn: netConn,
|
||||
bw: bufio.NewWriter(netConn),
|
||||
br: bufio.NewReader(netConn),
|
||||
readTimeout: do.readTimeout,
|
||||
writeTimeout: do.writeTimeout,
|
||||
}
|
||||
|
||||
if do.password != "" {
|
||||
authArgs := make([]interface{}, 0, 2)
|
||||
if do.username != "" {
|
||||
authArgs = append(authArgs, do.username)
|
||||
}
|
||||
authArgs = append(authArgs, do.password)
|
||||
if _, err := c.Do("AUTH", authArgs...); err != nil {
|
||||
netConn.Close()
|
||||
return nil, err
|
||||
}
|
||||
}
|
||||
|
||||
if do.clientName != "" {
|
||||
if _, err := c.Do("CLIENT", "SETNAME", do.clientName); err != nil {
|
||||
netConn.Close()
|
||||
return nil, err
|
||||
}
|
||||
}
|
||||
|
||||
if do.db != 0 {
|
||||
if _, err := c.Do("SELECT", do.db); err != nil {
|
||||
netConn.Close()
|
||||
return nil, err
|
||||
}
|
||||
}
|
||||
|
||||
return c, nil
|
||||
}
|
||||
|
||||
var pathDBRegexp = regexp.MustCompile(`/(\d*)\z`)
|
||||
|
||||
// DialURL connects to a Redis server at the given URL using the Redis
|
||||
// URI scheme. URLs should follow the draft IANA specification for the
|
||||
// scheme (https://www.iana.org/assignments/uri-schemes/prov/redis).
|
||||
func DialURL(rawurl string, options ...DialOption) (Conn, error) {
|
||||
u, err := url.Parse(rawurl)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
|
||||
if u.Scheme != "redis" && u.Scheme != "rediss" {
|
||||
return nil, fmt.Errorf("invalid redis URL scheme: %s", u.Scheme)
|
||||
}
|
||||
|
||||
if u.Opaque != "" {
|
||||
return nil, fmt.Errorf("invalid redis URL, url is opaque: %s", rawurl)
|
||||
}
|
||||
|
||||
// As per the IANA draft spec, the host defaults to localhost and
|
||||
// the port defaults to 6379.
|
||||
host, port, err := net.SplitHostPort(u.Host)
|
||||
if err != nil {
|
||||
// assume port is missing
|
||||
host = u.Host
|
||||
port = "6379"
|
||||
}
|
||||
if host == "" {
|
||||
host = "localhost"
|
||||
}
|
||||
address := net.JoinHostPort(host, port)
|
||||
|
||||
if u.User != nil {
|
||||
password, isSet := u.User.Password()
|
||||
if isSet {
|
||||
options = append(options, DialUsername(u.User.Username()), DialPassword(password))
|
||||
}
|
||||
}
|
||||
|
||||
match := pathDBRegexp.FindStringSubmatch(u.Path)
|
||||
if len(match) == 2 {
|
||||
db := 0
|
||||
if len(match[1]) > 0 {
|
||||
db, err = strconv.Atoi(match[1])
|
||||
if err != nil {
|
||||
return nil, fmt.Errorf("invalid database: %s", u.Path[1:])
|
||||
}
|
||||
}
|
||||
if db != 0 {
|
||||
options = append(options, DialDatabase(db))
|
||||
}
|
||||
} else if u.Path != "" {
|
||||
return nil, fmt.Errorf("invalid database: %s", u.Path[1:])
|
||||
}
|
||||
|
||||
options = append(options, DialUseTLS(u.Scheme == "rediss"))
|
||||
|
||||
return Dial("tcp", address, options...)
|
||||
}
|
||||
|
||||
// NewConn returns a new Redigo connection for the given net connection.
|
||||
func NewConn(netConn net.Conn, readTimeout, writeTimeout time.Duration) Conn {
|
||||
return &conn{
|
||||
conn: netConn,
|
||||
bw: bufio.NewWriter(netConn),
|
||||
br: bufio.NewReader(netConn),
|
||||
readTimeout: readTimeout,
|
||||
writeTimeout: writeTimeout,
|
||||
}
|
||||
}
|
||||
|
||||
func (c *conn) Close() error {
|
||||
c.mu.Lock()
|
||||
err := c.err
|
||||
if c.err == nil {
|
||||
c.err = errors.New("redigo: closed")
|
||||
err = c.conn.Close()
|
||||
}
|
||||
c.mu.Unlock()
|
||||
return err
|
||||
}
|
||||
|
||||
func (c *conn) fatal(err error) error {
|
||||
c.mu.Lock()
|
||||
if c.err == nil {
|
||||
c.err = err
|
||||
// Close connection to force errors on subsequent calls and to unblock
|
||||
// other reader or writer.
|
||||
c.conn.Close()
|
||||
}
|
||||
c.mu.Unlock()
|
||||
return err
|
||||
}
|
||||
|
||||
func (c *conn) Err() error {
|
||||
c.mu.Lock()
|
||||
err := c.err
|
||||
c.mu.Unlock()
|
||||
return err
|
||||
}
|
||||
|
||||
func (c *conn) writeLen(prefix byte, n int) error {
|
||||
c.lenScratch[len(c.lenScratch)-1] = '\n'
|
||||
c.lenScratch[len(c.lenScratch)-2] = '\r'
|
||||
i := len(c.lenScratch) - 3
|
||||
for {
|
||||
c.lenScratch[i] = byte('0' + n%10)
|
||||
i -= 1
|
||||
n = n / 10
|
||||
if n == 0 {
|
||||
break
|
||||
}
|
||||
}
|
||||
c.lenScratch[i] = prefix
|
||||
_, err := c.bw.Write(c.lenScratch[i:])
|
||||
return err
|
||||
}
|
||||
|
||||
func (c *conn) writeString(s string) error {
|
||||
c.writeLen('$', len(s))
|
||||
c.bw.WriteString(s)
|
||||
_, err := c.bw.WriteString("\r\n")
|
||||
return err
|
||||
}
|
||||
|
||||
func (c *conn) writeBytes(p []byte) error {
|
||||
c.writeLen('$', len(p))
|
||||
c.bw.Write(p)
|
||||
_, err := c.bw.WriteString("\r\n")
|
||||
return err
|
||||
}
|
||||
|
||||
func (c *conn) writeInt64(n int64) error {
|
||||
return c.writeBytes(strconv.AppendInt(c.numScratch[:0], n, 10))
|
||||
}
|
||||
|
||||
func (c *conn) writeFloat64(n float64) error {
|
||||
return c.writeBytes(strconv.AppendFloat(c.numScratch[:0], n, 'g', -1, 64))
|
||||
}
|
||||
|
||||
func (c *conn) writeCommand(cmd string, args []interface{}) error {
|
||||
c.writeLen('*', 1+len(args))
|
||||
if err := c.writeString(cmd); err != nil {
|
||||
return err
|
||||
}
|
||||
for _, arg := range args {
|
||||
if err := c.writeArg(arg, true); err != nil {
|
||||
return err
|
||||
}
|
||||
}
|
||||
return nil
|
||||
}
|
||||
|
||||
func (c *conn) writeArg(arg interface{}, argumentTypeOK bool) (err error) {
|
||||
switch arg := arg.(type) {
|
||||
case string:
|
||||
return c.writeString(arg)
|
||||
case []byte:
|
||||
return c.writeBytes(arg)
|
||||
case int:
|
||||
return c.writeInt64(int64(arg))
|
||||
case int64:
|
||||
return c.writeInt64(arg)
|
||||
case float64:
|
||||
return c.writeFloat64(arg)
|
||||
case bool:
|
||||
if arg {
|
||||
return c.writeString("1")
|
||||
} else {
|
||||
return c.writeString("0")
|
||||
}
|
||||
case nil:
|
||||
return c.writeString("")
|
||||
case Argument:
|
||||
if argumentTypeOK {
|
||||
return c.writeArg(arg.RedisArg(), false)
|
||||
}
|
||||
// See comment in default clause below.
|
||||
var buf bytes.Buffer
|
||||
fmt.Fprint(&buf, arg)
|
||||
return c.writeBytes(buf.Bytes())
|
||||
default:
|
||||
// This default clause is intended to handle builtin numeric types.
|
||||
// The function should return an error for other types, but this is not
|
||||
// done for compatibility with previous versions of the package.
|
||||
var buf bytes.Buffer
|
||||
fmt.Fprint(&buf, arg)
|
||||
return c.writeBytes(buf.Bytes())
|
||||
}
|
||||
}
|
||||
|
||||
type protocolError string
|
||||
|
||||
func (pe protocolError) Error() string {
|
||||
return fmt.Sprintf("redigo: %s (possible server error or unsupported concurrent read by application)", string(pe))
|
||||
}
|
||||
|
||||
// readLine reads a line of input from the RESP stream.
|
||||
func (c *conn) readLine() ([]byte, error) {
|
||||
// To avoid allocations, attempt to read the line using ReadSlice. This
|
||||
// call typically succeeds. The known case where the call fails is when
|
||||
// reading the output from the MONITOR command.
|
||||
p, err := c.br.ReadSlice('\n')
|
||||
if err == bufio.ErrBufferFull {
|
||||
// The line does not fit in the bufio.Reader's buffer. Fall back to
|
||||
// allocating a buffer for the line.
|
||||
buf := append([]byte{}, p...)
|
||||
for err == bufio.ErrBufferFull {
|
||||
p, err = c.br.ReadSlice('\n')
|
||||
buf = append(buf, p...)
|
||||
}
|
||||
p = buf
|
||||
}
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
i := len(p) - 2
|
||||
if i < 0 || p[i] != '\r' {
|
||||
return nil, protocolError("bad response line terminator")
|
||||
}
|
||||
return p[:i], nil
|
||||
}
|
||||
|
||||
// parseLen parses bulk string and array lengths.
|
||||
func parseLen(p []byte) (int, error) {
|
||||
if len(p) == 0 {
|
||||
return -1, protocolError("malformed length")
|
||||
}
|
||||
|
||||
if p[0] == '-' && len(p) == 2 && p[1] == '1' {
|
||||
// handle $-1 and $-1 null replies.
|
||||
return -1, nil
|
||||
}
|
||||
|
||||
var n int
|
||||
for _, b := range p {
|
||||
n *= 10
|
||||
if b < '0' || b > '9' {
|
||||
return -1, protocolError("illegal bytes in length")
|
||||
}
|
||||
n += int(b - '0')
|
||||
}
|
||||
|
||||
return n, nil
|
||||
}
|
||||
|
||||
// parseInt parses an integer reply.
|
||||
func parseInt(p []byte) (interface{}, error) {
|
||||
if len(p) == 0 {
|
||||
return 0, protocolError("malformed integer")
|
||||
}
|
||||
|
||||
var negate bool
|
||||
if p[0] == '-' {
|
||||
negate = true
|
||||
p = p[1:]
|
||||
if len(p) == 0 {
|
||||
return 0, protocolError("malformed integer")
|
||||
}
|
||||
}
|
||||
|
||||
var n int64
|
||||
for _, b := range p {
|
||||
n *= 10
|
||||
if b < '0' || b > '9' {
|
||||
return 0, protocolError("illegal bytes in length")
|
||||
}
|
||||
n += int64(b - '0')
|
||||
}
|
||||
|
||||
if negate {
|
||||
n = -n
|
||||
}
|
||||
return n, nil
|
||||
}
|
||||
|
||||
var (
|
||||
okReply interface{} = "OK"
|
||||
pongReply interface{} = "PONG"
|
||||
)
|
||||
|
||||
func (c *conn) readReply() (interface{}, error) {
|
||||
line, err := c.readLine()
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
if len(line) == 0 {
|
||||
return nil, protocolError("short response line")
|
||||
}
|
||||
switch line[0] {
|
||||
case '+':
|
||||
switch string(line[1:]) {
|
||||
case "OK":
|
||||
// Avoid allocation for frequent "+OK" response.
|
||||
return okReply, nil
|
||||
case "PONG":
|
||||
// Avoid allocation in PING command benchmarks :)
|
||||
return pongReply, nil
|
||||
default:
|
||||
return string(line[1:]), nil
|
||||
}
|
||||
case '-':
|
||||
return Error(string(line[1:])), nil
|
||||
case ':':
|
||||
return parseInt(line[1:])
|
||||
case '$':
|
||||
n, err := parseLen(line[1:])
|
||||
if n < 0 || err != nil {
|
||||
return nil, err
|
||||
}
|
||||
p := make([]byte, n)
|
||||
_, err = io.ReadFull(c.br, p)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
if line, err := c.readLine(); err != nil {
|
||||
return nil, err
|
||||
} else if len(line) != 0 {
|
||||
return nil, protocolError("bad bulk string format")
|
||||
}
|
||||
return p, nil
|
||||
case '*':
|
||||
n, err := parseLen(line[1:])
|
||||
if n < 0 || err != nil {
|
||||
return nil, err
|
||||
}
|
||||
r := make([]interface{}, n)
|
||||
for i := range r {
|
||||
r[i], err = c.readReply()
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
}
|
||||
return r, nil
|
||||
}
|
||||
return nil, protocolError("unexpected response line")
|
||||
}
|
||||
|
||||
func (c *conn) Send(cmd string, args ...interface{}) error {
|
||||
c.mu.Lock()
|
||||
c.pending += 1
|
||||
c.mu.Unlock()
|
||||
if c.writeTimeout != 0 {
|
||||
c.conn.SetWriteDeadline(time.Now().Add(c.writeTimeout))
|
||||
}
|
||||
if err := c.writeCommand(cmd, args); err != nil {
|
||||
return c.fatal(err)
|
||||
}
|
||||
return nil
|
||||
}
|
||||
|
||||
func (c *conn) Flush() error {
|
||||
if c.writeTimeout != 0 {
|
||||
c.conn.SetWriteDeadline(time.Now().Add(c.writeTimeout))
|
||||
}
|
||||
if err := c.bw.Flush(); err != nil {
|
||||
return c.fatal(err)
|
||||
}
|
||||
return nil
|
||||
}
|
||||
|
||||
func (c *conn) Receive() (interface{}, error) {
|
||||
return c.ReceiveWithTimeout(c.readTimeout)
|
||||
}
|
||||
|
||||
func (c *conn) ReceiveWithTimeout(timeout time.Duration) (reply interface{}, err error) {
|
||||
var deadline time.Time
|
||||
if timeout != 0 {
|
||||
deadline = time.Now().Add(timeout)
|
||||
}
|
||||
c.conn.SetReadDeadline(deadline)
|
||||
|
||||
if reply, err = c.readReply(); err != nil {
|
||||
return nil, c.fatal(err)
|
||||
}
|
||||
// When using pub/sub, the number of receives can be greater than the
|
||||
// number of sends. To enable normal use of the connection after
|
||||
// unsubscribing from all channels, we do not decrement pending to a
|
||||
// negative value.
|
||||
//
|
||||
// The pending field is decremented after the reply is read to handle the
|
||||
// case where Receive is called before Send.
|
||||
c.mu.Lock()
|
||||
if c.pending > 0 {
|
||||
c.pending -= 1
|
||||
}
|
||||
c.mu.Unlock()
|
||||
if err, ok := reply.(Error); ok {
|
||||
return nil, err
|
||||
}
|
||||
return
|
||||
}
|
||||
|
||||
func (c *conn) Do(cmd string, args ...interface{}) (interface{}, error) {
|
||||
return c.DoWithTimeout(c.readTimeout, cmd, args...)
|
||||
}
|
||||
|
||||
func (c *conn) DoWithTimeout(readTimeout time.Duration, cmd string, args ...interface{}) (interface{}, error) {
|
||||
c.mu.Lock()
|
||||
pending := c.pending
|
||||
c.pending = 0
|
||||
c.mu.Unlock()
|
||||
|
||||
if cmd == "" && pending == 0 {
|
||||
return nil, nil
|
||||
}
|
||||
|
||||
if c.writeTimeout != 0 {
|
||||
c.conn.SetWriteDeadline(time.Now().Add(c.writeTimeout))
|
||||
}
|
||||
|
||||
if cmd != "" {
|
||||
if err := c.writeCommand(cmd, args); err != nil {
|
||||
return nil, c.fatal(err)
|
||||
}
|
||||
}
|
||||
|
||||
if err := c.bw.Flush(); err != nil {
|
||||
return nil, c.fatal(err)
|
||||
}
|
||||
|
||||
var deadline time.Time
|
||||
if readTimeout != 0 {
|
||||
deadline = time.Now().Add(readTimeout)
|
||||
}
|
||||
c.conn.SetReadDeadline(deadline)
|
||||
|
||||
if cmd == "" {
|
||||
reply := make([]interface{}, pending)
|
||||
for i := range reply {
|
||||
r, e := c.readReply()
|
||||
if e != nil {
|
||||
return nil, c.fatal(e)
|
||||
}
|
||||
reply[i] = r
|
||||
}
|
||||
return reply, nil
|
||||
}
|
||||
|
||||
var err error
|
||||
var reply interface{}
|
||||
for i := 0; i <= pending; i++ {
|
||||
var e error
|
||||
if reply, e = c.readReply(); e != nil {
|
||||
return nil, c.fatal(e)
|
||||
}
|
||||
if e, ok := reply.(Error); ok && err == nil {
|
||||
err = e
|
||||
}
|
||||
}
|
||||
return reply, err
|
||||
}
|
|
@ -14,7 +14,7 @@
|
|||
|
||||
// Package redis is a client for the Redis database.
|
||||
//
|
||||
// The Redigo FAQ (https://github.com/garyburd/redigo/wiki/FAQ) contains more
|
||||
// The Redigo FAQ (https://github.com/gomodule/redigo/wiki/FAQ) contains more
|
||||
// documentation about this package.
|
||||
//
|
||||
// Connections
|
||||
|
@ -38,7 +38,7 @@
|
|||
//
|
||||
// n, err := conn.Do("APPEND", "key", "value")
|
||||
//
|
||||
// The Do method converts command arguments to binary strings for transmission
|
||||
// The Do method converts command arguments to bulk strings for transmission
|
||||
// to the server as follows:
|
||||
//
|
||||
// Go Type Conversion
|
||||
|
@ -48,7 +48,7 @@
|
|||
// float64 strconv.FormatFloat(v, 'g', -1, 64)
|
||||
// bool true -> "1", false -> "0"
|
||||
// nil ""
|
||||
// all other types fmt.Print(v)
|
||||
// all other types fmt.Fprint(w, v)
|
||||
//
|
||||
// Redis command reply types are represented using the following Go types:
|
||||
//
|
||||
|
@ -99,15 +99,14 @@
|
|||
//
|
||||
// Concurrency
|
||||
//
|
||||
// Connections do not support concurrent calls to the write methods (Send,
|
||||
// Flush) or concurrent calls to the read method (Receive). Connections do
|
||||
// allow a concurrent reader and writer.
|
||||
// Connections support one concurrent caller to the Receive method and one
|
||||
// concurrent caller to the Send and Flush methods. No other concurrency is
|
||||
// supported including concurrent calls to the Do and Close methods.
|
||||
//
|
||||
// Because the Do method combines the functionality of Send, Flush and Receive,
|
||||
// the Do method cannot be called concurrently with the other methods.
|
||||
//
|
||||
// For full concurrent access to Redis, use the thread-safe Pool to get and
|
||||
// release connections from within a goroutine.
|
||||
// For full concurrent access to Redis, use the thread-safe Pool to get, use
|
||||
// and release a connection from within a goroutine. Connections returned from
|
||||
// a Pool have the concurrency restrictions described in the previous
|
||||
// paragraph.
|
||||
//
|
||||
// Publish and Subscribe
|
||||
//
|
||||
|
@ -128,7 +127,7 @@
|
|||
// send and flush a subscription management command. The receive method
|
||||
// converts a pushed message to convenient types for use in a type switch.
|
||||
//
|
||||
// psc := redis.PubSubConn{c}
|
||||
// psc := redis.PubSubConn{Conn: c}
|
||||
// psc.Subscribe("example")
|
||||
// for {
|
||||
// switch v := psc.Receive().(type) {
|
||||
|
@ -166,4 +165,13 @@
|
|||
// if _, err := redis.Scan(reply, &value1, &value2); err != nil {
|
||||
// // handle error
|
||||
// }
|
||||
package redis // import "github.com/garyburd/redigo/redis"
|
||||
//
|
||||
// Errors
|
||||
//
|
||||
// Connection methods return error replies from the server as type redis.Error.
|
||||
//
|
||||
// Call the connection Err() method to determine if the connection encountered
|
||||
// non-recoverable error such as a network error or protocol parsing error. If
|
||||
// Err() returns a non-nil value, then the connection is not usable and should
|
||||
// be closed.
|
||||
package redis
|
|
@ -0,0 +1,29 @@
|
|||
// +build go1.7,!go1.8
|
||||
|
||||
package redis
|
||||
|
||||
import "crypto/tls"
|
||||
|
||||
func cloneTLSConfig(cfg *tls.Config) *tls.Config {
|
||||
return &tls.Config{
|
||||
Rand: cfg.Rand,
|
||||
Time: cfg.Time,
|
||||
Certificates: cfg.Certificates,
|
||||
NameToCertificate: cfg.NameToCertificate,
|
||||
GetCertificate: cfg.GetCertificate,
|
||||
RootCAs: cfg.RootCAs,
|
||||
NextProtos: cfg.NextProtos,
|
||||
ServerName: cfg.ServerName,
|
||||
ClientAuth: cfg.ClientAuth,
|
||||
ClientCAs: cfg.ClientCAs,
|
||||
InsecureSkipVerify: cfg.InsecureSkipVerify,
|
||||
CipherSuites: cfg.CipherSuites,
|
||||
PreferServerCipherSuites: cfg.PreferServerCipherSuites,
|
||||
ClientSessionCache: cfg.ClientSessionCache,
|
||||
MinVersion: cfg.MinVersion,
|
||||
MaxVersion: cfg.MaxVersion,
|
||||
CurvePreferences: cfg.CurvePreferences,
|
||||
DynamicRecordSizingDisabled: cfg.DynamicRecordSizingDisabled,
|
||||
Renegotiation: cfg.Renegotiation,
|
||||
}
|
||||
}
|
|
@ -0,0 +1,9 @@
|
|||
// +build go1.8
|
||||
|
||||
package redis
|
||||
|
||||
import "crypto/tls"
|
||||
|
||||
func cloneTLSConfig(cfg *tls.Config) *tls.Config {
|
||||
return cfg.Clone()
|
||||
}
|
|
@ -18,6 +18,11 @@ import (
|
|||
"bytes"
|
||||
"fmt"
|
||||
"log"
|
||||
"time"
|
||||
)
|
||||
|
||||
var (
|
||||
_ ConnWithTimeout = (*loggingConn)(nil)
|
||||
)
|
||||
|
||||
// NewLoggingConn returns a logging wrapper around a connection.
|
||||
|
@ -25,13 +30,22 @@ func NewLoggingConn(conn Conn, logger *log.Logger, prefix string) Conn {
|
|||
if prefix != "" {
|
||||
prefix = prefix + "."
|
||||
}
|
||||
return &loggingConn{conn, logger, prefix}
|
||||
return &loggingConn{conn, logger, prefix, nil}
|
||||
}
|
||||
|
||||
//NewLoggingConnFilter returns a logging wrapper around a connection and a filter function.
|
||||
func NewLoggingConnFilter(conn Conn, logger *log.Logger, prefix string, skip func(cmdName string) bool) Conn {
|
||||
if prefix != "" {
|
||||
prefix = prefix + "."
|
||||
}
|
||||
return &loggingConn{conn, logger, prefix, skip}
|
||||
}
|
||||
|
||||
type loggingConn struct {
|
||||
Conn
|
||||
logger *log.Logger
|
||||
prefix string
|
||||
skip func(cmdName string) bool
|
||||
}
|
||||
|
||||
func (c *loggingConn) Close() error {
|
||||
|
@ -80,6 +94,9 @@ func (c *loggingConn) printValue(buf *bytes.Buffer, v interface{}) {
|
|||
}
|
||||
|
||||
func (c *loggingConn) print(method, commandName string, args []interface{}, reply interface{}, err error) {
|
||||
if c.skip != nil && c.skip(commandName) {
|
||||
return
|
||||
}
|
||||
var buf bytes.Buffer
|
||||
fmt.Fprintf(&buf, "%s%s(", c.prefix, method)
|
||||
if method != "Receive" {
|
||||
|
@ -104,6 +121,12 @@ func (c *loggingConn) Do(commandName string, args ...interface{}) (interface{},
|
|||
return reply, err
|
||||
}
|
||||
|
||||
func (c *loggingConn) DoWithTimeout(timeout time.Duration, commandName string, args ...interface{}) (interface{}, error) {
|
||||
reply, err := DoWithTimeout(c.Conn, timeout, commandName, args...)
|
||||
c.print("DoWithTimeout", commandName, args, reply, err)
|
||||
return reply, err
|
||||
}
|
||||
|
||||
func (c *loggingConn) Send(commandName string, args ...interface{}) error {
|
||||
err := c.Conn.Send(commandName, args...)
|
||||
c.print("Send", commandName, args, nil, err)
|
||||
|
@ -115,3 +138,9 @@ func (c *loggingConn) Receive() (interface{}, error) {
|
|||
c.print("Receive", "", nil, reply, err)
|
||||
return reply, err
|
||||
}
|
||||
|
||||
func (c *loggingConn) ReceiveWithTimeout(timeout time.Duration) (interface{}, error) {
|
||||
reply, err := ReceiveWithTimeout(c.Conn, timeout)
|
||||
c.print("ReceiveWithTimeout", "", nil, reply, err)
|
||||
return reply, err
|
||||
}
|
|
@ -0,0 +1,635 @@
|
|||
// Copyright 2012 Gary Burd
|
||||
//
|
||||
// Licensed under the Apache License, Version 2.0 (the "License"): you may
|
||||
// not use this file except in compliance with the License. You may obtain
|
||||
// a copy of the License at
|
||||
//
|
||||
// http://www.apache.org/licenses/LICENSE-2.0
|
||||
//
|
||||
// Unless required by applicable law or agreed to in writing, software
|
||||
// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
|
||||
// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
|
||||
// License for the specific language governing permissions and limitations
|
||||
// under the License.
|
||||
|
||||
package redis
|
||||
|
||||
import (
|
||||
"bytes"
|
||||
"context"
|
||||
"crypto/rand"
|
||||
"crypto/sha1"
|
||||
"errors"
|
||||
"io"
|
||||
"strconv"
|
||||
"sync"
|
||||
"sync/atomic"
|
||||
"time"
|
||||
)
|
||||
|
||||
var (
|
||||
_ ConnWithTimeout = (*activeConn)(nil)
|
||||
_ ConnWithTimeout = (*errorConn)(nil)
|
||||
)
|
||||
|
||||
var nowFunc = time.Now // for testing
|
||||
|
||||
// ErrPoolExhausted is returned from a pool connection method (Do, Send,
|
||||
// Receive, Flush, Err) when the maximum number of database connections in the
|
||||
// pool has been reached.
|
||||
var ErrPoolExhausted = errors.New("redigo: connection pool exhausted")
|
||||
|
||||
var (
|
||||
errPoolClosed = errors.New("redigo: connection pool closed")
|
||||
errConnClosed = errors.New("redigo: connection closed")
|
||||
)
|
||||
|
||||
// Pool maintains a pool of connections. The application calls the Get method
|
||||
// to get a connection from the pool and the connection's Close method to
|
||||
// return the connection's resources to the pool.
|
||||
//
|
||||
// The following example shows how to use a pool in a web application. The
|
||||
// application creates a pool at application startup and makes it available to
|
||||
// request handlers using a package level variable. The pool configuration used
|
||||
// here is an example, not a recommendation.
|
||||
//
|
||||
// func newPool(addr string) *redis.Pool {
|
||||
// return &redis.Pool{
|
||||
// MaxIdle: 3,
|
||||
// IdleTimeout: 240 * time.Second,
|
||||
// // Dial or DialContext must be set. When both are set, DialContext takes precedence over Dial.
|
||||
// Dial: func () (redis.Conn, error) { return redis.Dial("tcp", addr) },
|
||||
// }
|
||||
// }
|
||||
//
|
||||
// var (
|
||||
// pool *redis.Pool
|
||||
// redisServer = flag.String("redisServer", ":6379", "")
|
||||
// )
|
||||
//
|
||||
// func main() {
|
||||
// flag.Parse()
|
||||
// pool = newPool(*redisServer)
|
||||
// ...
|
||||
// }
|
||||
//
|
||||
// A request handler gets a connection from the pool and closes the connection
|
||||
// when the handler is done:
|
||||
//
|
||||
// func serveHome(w http.ResponseWriter, r *http.Request) {
|
||||
// conn := pool.Get()
|
||||
// defer conn.Close()
|
||||
// ...
|
||||
// }
|
||||
//
|
||||
// Use the Dial function to authenticate connections with the AUTH command or
|
||||
// select a database with the SELECT command:
|
||||
//
|
||||
// pool := &redis.Pool{
|
||||
// // Other pool configuration not shown in this example.
|
||||
// Dial: func () (redis.Conn, error) {
|
||||
// c, err := redis.Dial("tcp", server)
|
||||
// if err != nil {
|
||||
// return nil, err
|
||||
// }
|
||||
// if _, err := c.Do("AUTH", password); err != nil {
|
||||
// c.Close()
|
||||
// return nil, err
|
||||
// }
|
||||
// if _, err := c.Do("SELECT", db); err != nil {
|
||||
// c.Close()
|
||||
// return nil, err
|
||||
// }
|
||||
// return c, nil
|
||||
// },
|
||||
// }
|
||||
//
|
||||
// Use the TestOnBorrow function to check the health of an idle connection
|
||||
// before the connection is returned to the application. This example PINGs
|
||||
// connections that have been idle more than a minute:
|
||||
//
|
||||
// pool := &redis.Pool{
|
||||
// // Other pool configuration not shown in this example.
|
||||
// TestOnBorrow: func(c redis.Conn, t time.Time) error {
|
||||
// if time.Since(t) < time.Minute {
|
||||
// return nil
|
||||
// }
|
||||
// _, err := c.Do("PING")
|
||||
// return err
|
||||
// },
|
||||
// }
|
||||
//
|
||||
type Pool struct {
|
||||
// Dial is an application supplied function for creating and configuring a
|
||||
// connection.
|
||||
//
|
||||
// The connection returned from Dial must not be in a special state
|
||||
// (subscribed to pubsub channel, transaction started, ...).
|
||||
Dial func() (Conn, error)
|
||||
|
||||
// DialContext is an application supplied function for creating and configuring a
|
||||
// connection with the given context.
|
||||
//
|
||||
// The connection returned from Dial must not be in a special state
|
||||
// (subscribed to pubsub channel, transaction started, ...).
|
||||
DialContext func(ctx context.Context) (Conn, error)
|
||||
|
||||
// TestOnBorrow is an optional application supplied function for checking
|
||||
// the health of an idle connection before the connection is used again by
|
||||
// the application. Argument t is the time that the connection was returned
|
||||
// to the pool. If the function returns an error, then the connection is
|
||||
// closed.
|
||||
TestOnBorrow func(c Conn, t time.Time) error
|
||||
|
||||
// Maximum number of idle connections in the pool.
|
||||
MaxIdle int
|
||||
|
||||
// Maximum number of connections allocated by the pool at a given time.
|
||||
// When zero, there is no limit on the number of connections in the pool.
|
||||
MaxActive int
|
||||
|
||||
// Close connections after remaining idle for this duration. If the value
|
||||
// is zero, then idle connections are not closed. Applications should set
|
||||
// the timeout to a value less than the server's timeout.
|
||||
IdleTimeout time.Duration
|
||||
|
||||
// If Wait is true and the pool is at the MaxActive limit, then Get() waits
|
||||
// for a connection to be returned to the pool before returning.
|
||||
Wait bool
|
||||
|
||||
// Close connections older than this duration. If the value is zero, then
|
||||
// the pool does not close connections based on age.
|
||||
MaxConnLifetime time.Duration
|
||||
|
||||
chInitialized uint32 // set to 1 when field ch is initialized
|
||||
|
||||
mu sync.Mutex // mu protects the following fields
|
||||
closed bool // set to true when the pool is closed.
|
||||
active int // the number of open connections in the pool
|
||||
ch chan struct{} // limits open connections when p.Wait is true
|
||||
idle idleList // idle connections
|
||||
waitCount int64 // total number of connections waited for.
|
||||
waitDuration time.Duration // total time waited for new connections.
|
||||
}
|
||||
|
||||
// NewPool creates a new pool.
|
||||
//
|
||||
// Deprecated: Initialize the Pool directly as shown in the example.
|
||||
func NewPool(newFn func() (Conn, error), maxIdle int) *Pool {
|
||||
return &Pool{Dial: newFn, MaxIdle: maxIdle}
|
||||
}
|
||||
|
||||
// Get gets a connection. The application must close the returned connection.
|
||||
// This method always returns a valid connection so that applications can defer
|
||||
// error handling to the first use of the connection. If there is an error
|
||||
// getting an underlying connection, then the connection Err, Do, Send, Flush
|
||||
// and Receive methods return that error.
|
||||
func (p *Pool) Get() Conn {
|
||||
// GetContext returns errorConn in the first argument when an error occurs.
|
||||
c, _ := p.GetContext(context.Background())
|
||||
return c
|
||||
}
|
||||
|
||||
// GetContext gets a connection using the provided context.
|
||||
//
|
||||
// The provided Context must be non-nil. If the context expires before the
|
||||
// connection is complete, an error is returned. Any expiration on the context
|
||||
// will not affect the returned connection.
|
||||
//
|
||||
// If the function completes without error, then the application must close the
|
||||
// returned connection.
|
||||
func (p *Pool) GetContext(ctx context.Context) (Conn, error) {
|
||||
// Wait until there is a vacant connection in the pool.
|
||||
waited, err := p.waitVacantConn(ctx)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
|
||||
p.mu.Lock()
|
||||
|
||||
if waited > 0 {
|
||||
p.waitCount++
|
||||
p.waitDuration += waited
|
||||
}
|
||||
|
||||
// Prune stale connections at the back of the idle list.
|
||||
if p.IdleTimeout > 0 {
|
||||
n := p.idle.count
|
||||
for i := 0; i < n && p.idle.back != nil && p.idle.back.t.Add(p.IdleTimeout).Before(nowFunc()); i++ {
|
||||
pc := p.idle.back
|
||||
p.idle.popBack()
|
||||
p.mu.Unlock()
|
||||
pc.c.Close()
|
||||
p.mu.Lock()
|
||||
p.active--
|
||||
}
|
||||
}
|
||||
|
||||
// Get idle connection from the front of idle list.
|
||||
for p.idle.front != nil {
|
||||
pc := p.idle.front
|
||||
p.idle.popFront()
|
||||
p.mu.Unlock()
|
||||
if (p.TestOnBorrow == nil || p.TestOnBorrow(pc.c, pc.t) == nil) &&
|
||||
(p.MaxConnLifetime == 0 || nowFunc().Sub(pc.created) < p.MaxConnLifetime) {
|
||||
return &activeConn{p: p, pc: pc}, nil
|
||||
}
|
||||
pc.c.Close()
|
||||
p.mu.Lock()
|
||||
p.active--
|
||||
}
|
||||
|
||||
// Check for pool closed before dialing a new connection.
|
||||
if p.closed {
|
||||
p.mu.Unlock()
|
||||
err := errors.New("redigo: get on closed pool")
|
||||
return errorConn{err}, err
|
||||
}
|
||||
|
||||
// Handle limit for p.Wait == false.
|
||||
if !p.Wait && p.MaxActive > 0 && p.active >= p.MaxActive {
|
||||
p.mu.Unlock()
|
||||
return errorConn{ErrPoolExhausted}, ErrPoolExhausted
|
||||
}
|
||||
|
||||
p.active++
|
||||
p.mu.Unlock()
|
||||
c, err := p.dial(ctx)
|
||||
if err != nil {
|
||||
c = nil
|
||||
p.mu.Lock()
|
||||
p.active--
|
||||
if p.ch != nil && !p.closed {
|
||||
p.ch <- struct{}{}
|
||||
}
|
||||
p.mu.Unlock()
|
||||
return errorConn{err}, err
|
||||
}
|
||||
return &activeConn{p: p, pc: &poolConn{c: c, created: nowFunc()}}, nil
|
||||
}
|
||||
|
||||
// PoolStats contains pool statistics.
|
||||
type PoolStats struct {
|
||||
// ActiveCount is the number of connections in the pool. The count includes
|
||||
// idle connections and connections in use.
|
||||
ActiveCount int
|
||||
// IdleCount is the number of idle connections in the pool.
|
||||
IdleCount int
|
||||
|
||||
// WaitCount is the total number of connections waited for.
|
||||
// This value is currently not guaranteed to be 100% accurate.
|
||||
WaitCount int64
|
||||
|
||||
// WaitDuration is the total time blocked waiting for a new connection.
|
||||
// This value is currently not guaranteed to be 100% accurate.
|
||||
WaitDuration time.Duration
|
||||
}
|
||||
|
||||
// Stats returns pool's statistics.
|
||||
func (p *Pool) Stats() PoolStats {
|
||||
p.mu.Lock()
|
||||
stats := PoolStats{
|
||||
ActiveCount: p.active,
|
||||
IdleCount: p.idle.count,
|
||||
WaitCount: p.waitCount,
|
||||
WaitDuration: p.waitDuration,
|
||||
}
|
||||
p.mu.Unlock()
|
||||
|
||||
return stats
|
||||
}
|
||||
|
||||
// ActiveCount returns the number of connections in the pool. The count
|
||||
// includes idle connections and connections in use.
|
||||
func (p *Pool) ActiveCount() int {
|
||||
p.mu.Lock()
|
||||
active := p.active
|
||||
p.mu.Unlock()
|
||||
return active
|
||||
}
|
||||
|
||||
// IdleCount returns the number of idle connections in the pool.
|
||||
func (p *Pool) IdleCount() int {
|
||||
p.mu.Lock()
|
||||
idle := p.idle.count
|
||||
p.mu.Unlock()
|
||||
return idle
|
||||
}
|
||||
|
||||
// Close releases the resources used by the pool.
|
||||
func (p *Pool) Close() error {
|
||||
p.mu.Lock()
|
||||
if p.closed {
|
||||
p.mu.Unlock()
|
||||
return nil
|
||||
}
|
||||
p.closed = true
|
||||
p.active -= p.idle.count
|
||||
pc := p.idle.front
|
||||
p.idle.count = 0
|
||||
p.idle.front, p.idle.back = nil, nil
|
||||
if p.ch != nil {
|
||||
close(p.ch)
|
||||
}
|
||||
p.mu.Unlock()
|
||||
for ; pc != nil; pc = pc.next {
|
||||
pc.c.Close()
|
||||
}
|
||||
return nil
|
||||
}
|
||||
|
||||
func (p *Pool) lazyInit() {
|
||||
// Fast path.
|
||||
if atomic.LoadUint32(&p.chInitialized) == 1 {
|
||||
return
|
||||
}
|
||||
// Slow path.
|
||||
p.mu.Lock()
|
||||
if p.chInitialized == 0 {
|
||||
p.ch = make(chan struct{}, p.MaxActive)
|
||||
if p.closed {
|
||||
close(p.ch)
|
||||
} else {
|
||||
for i := 0; i < p.MaxActive; i++ {
|
||||
p.ch <- struct{}{}
|
||||
}
|
||||
}
|
||||
atomic.StoreUint32(&p.chInitialized, 1)
|
||||
}
|
||||
p.mu.Unlock()
|
||||
}
|
||||
|
||||
// waitVacantConn waits for a vacant connection in pool if waiting
|
||||
// is enabled and pool size is limited, otherwise returns instantly.
|
||||
// If ctx expires before that, an error is returned.
|
||||
//
|
||||
// If there were no vacant connection in the pool right away it returns the time spent waiting
|
||||
// for that connection to appear in the pool.
|
||||
func (p *Pool) waitVacantConn(ctx context.Context) (waited time.Duration, err error) {
|
||||
if !p.Wait || p.MaxActive <= 0 {
|
||||
// No wait or no connection limit.
|
||||
return 0, nil
|
||||
}
|
||||
|
||||
p.lazyInit()
|
||||
|
||||
// wait indicates if we believe it will block so its not 100% accurate
|
||||
// however for stats it should be good enough.
|
||||
wait := len(p.ch) == 0
|
||||
var start time.Time
|
||||
if wait {
|
||||
start = time.Now()
|
||||
}
|
||||
|
||||
if ctx == nil {
|
||||
<-p.ch
|
||||
} else {
|
||||
select {
|
||||
case <-p.ch:
|
||||
// Additionally check that context hasn't expired while we were waiting,
|
||||
// because `select` picks a random `case` if several of them are "ready".
|
||||
select {
|
||||
case <-ctx.Done():
|
||||
return 0, ctx.Err()
|
||||
default:
|
||||
}
|
||||
case <-ctx.Done():
|
||||
return 0, ctx.Err()
|
||||
}
|
||||
}
|
||||
|
||||
if wait {
|
||||
return time.Since(start), nil
|
||||
}
|
||||
return 0, nil
|
||||
}
|
||||
|
||||
func (p *Pool) dial(ctx context.Context) (Conn, error) {
|
||||
if p.DialContext != nil {
|
||||
return p.DialContext(ctx)
|
||||
}
|
||||
if p.Dial != nil {
|
||||
return p.Dial()
|
||||
}
|
||||
return nil, errors.New("redigo: must pass Dial or DialContext to pool")
|
||||
}
|
||||
|
||||
func (p *Pool) put(pc *poolConn, forceClose bool) error {
|
||||
p.mu.Lock()
|
||||
if !p.closed && !forceClose {
|
||||
pc.t = nowFunc()
|
||||
p.idle.pushFront(pc)
|
||||
if p.idle.count > p.MaxIdle {
|
||||
pc = p.idle.back
|
||||
p.idle.popBack()
|
||||
} else {
|
||||
pc = nil
|
||||
}
|
||||
}
|
||||
|
||||
if pc != nil {
|
||||
p.mu.Unlock()
|
||||
pc.c.Close()
|
||||
p.mu.Lock()
|
||||
p.active--
|
||||
}
|
||||
|
||||
if p.ch != nil && !p.closed {
|
||||
p.ch <- struct{}{}
|
||||
}
|
||||
p.mu.Unlock()
|
||||
return nil
|
||||
}
|
||||
|
||||
type activeConn struct {
|
||||
p *Pool
|
||||
pc *poolConn
|
||||
state int
|
||||
}
|
||||
|
||||
var (
|
||||
sentinel []byte
|
||||
sentinelOnce sync.Once
|
||||
)
|
||||
|
||||
func initSentinel() {
|
||||
p := make([]byte, 64)
|
||||
if _, err := rand.Read(p); err == nil {
|
||||
sentinel = p
|
||||
} else {
|
||||
h := sha1.New()
|
||||
io.WriteString(h, "Oops, rand failed. Use time instead.")
|
||||
io.WriteString(h, strconv.FormatInt(time.Now().UnixNano(), 10))
|
||||
sentinel = h.Sum(nil)
|
||||
}
|
||||
}
|
||||
|
||||
func (ac *activeConn) Close() error {
|
||||
pc := ac.pc
|
||||
if pc == nil {
|
||||
return nil
|
||||
}
|
||||
ac.pc = nil
|
||||
|
||||
if ac.state&connectionMultiState != 0 {
|
||||
pc.c.Send("DISCARD")
|
||||
ac.state &^= (connectionMultiState | connectionWatchState)
|
||||
} else if ac.state&connectionWatchState != 0 {
|
||||
pc.c.Send("UNWATCH")
|
||||
ac.state &^= connectionWatchState
|
||||
}
|
||||
if ac.state&connectionSubscribeState != 0 {
|
||||
pc.c.Send("UNSUBSCRIBE")
|
||||
pc.c.Send("PUNSUBSCRIBE")
|
||||
// To detect the end of the message stream, ask the server to echo
|
||||
// a sentinel value and read until we see that value.
|
||||
sentinelOnce.Do(initSentinel)
|
||||
pc.c.Send("ECHO", sentinel)
|
||||
pc.c.Flush()
|
||||
for {
|
||||
p, err := pc.c.Receive()
|
||||
if err != nil {
|
||||
break
|
||||
}
|
||||
if p, ok := p.([]byte); ok && bytes.Equal(p, sentinel) {
|
||||
ac.state &^= connectionSubscribeState
|
||||
break
|
||||
}
|
||||
}
|
||||
}
|
||||
pc.c.Do("")
|
||||
ac.p.put(pc, ac.state != 0 || pc.c.Err() != nil)
|
||||
return nil
|
||||
}
|
||||
|
||||
func (ac *activeConn) Err() error {
|
||||
pc := ac.pc
|
||||
if pc == nil {
|
||||
return errConnClosed
|
||||
}
|
||||
return pc.c.Err()
|
||||
}
|
||||
|
||||
func (ac *activeConn) Do(commandName string, args ...interface{}) (reply interface{}, err error) {
|
||||
pc := ac.pc
|
||||
if pc == nil {
|
||||
return nil, errConnClosed
|
||||
}
|
||||
ci := lookupCommandInfo(commandName)
|
||||
ac.state = (ac.state | ci.Set) &^ ci.Clear
|
||||
return pc.c.Do(commandName, args...)
|
||||
}
|
||||
|
||||
func (ac *activeConn) DoWithTimeout(timeout time.Duration, commandName string, args ...interface{}) (reply interface{}, err error) {
|
||||
pc := ac.pc
|
||||
if pc == nil {
|
||||
return nil, errConnClosed
|
||||
}
|
||||
cwt, ok := pc.c.(ConnWithTimeout)
|
||||
if !ok {
|
||||
return nil, errTimeoutNotSupported
|
||||
}
|
||||
ci := lookupCommandInfo(commandName)
|
||||
ac.state = (ac.state | ci.Set) &^ ci.Clear
|
||||
return cwt.DoWithTimeout(timeout, commandName, args...)
|
||||
}
|
||||
|
||||
func (ac *activeConn) Send(commandName string, args ...interface{}) error {
|
||||
pc := ac.pc
|
||||
if pc == nil {
|
||||
return errConnClosed
|
||||
}
|
||||
ci := lookupCommandInfo(commandName)
|
||||
ac.state = (ac.state | ci.Set) &^ ci.Clear
|
||||
return pc.c.Send(commandName, args...)
|
||||
}
|
||||
|
||||
func (ac *activeConn) Flush() error {
|
||||
pc := ac.pc
|
||||
if pc == nil {
|
||||
return errConnClosed
|
||||
}
|
||||
return pc.c.Flush()
|
||||
}
|
||||
|
||||
func (ac *activeConn) Receive() (reply interface{}, err error) {
|
||||
pc := ac.pc
|
||||
if pc == nil {
|
||||
return nil, errConnClosed
|
||||
}
|
||||
return pc.c.Receive()
|
||||
}
|
||||
|
||||
func (ac *activeConn) ReceiveWithTimeout(timeout time.Duration) (reply interface{}, err error) {
|
||||
pc := ac.pc
|
||||
if pc == nil {
|
||||
return nil, errConnClosed
|
||||
}
|
||||
cwt, ok := pc.c.(ConnWithTimeout)
|
||||
if !ok {
|
||||
return nil, errTimeoutNotSupported
|
||||
}
|
||||
return cwt.ReceiveWithTimeout(timeout)
|
||||
}
|
||||
|
||||
type errorConn struct{ err error }
|
||||
|
||||
func (ec errorConn) Do(string, ...interface{}) (interface{}, error) { return nil, ec.err }
|
||||
func (ec errorConn) DoWithTimeout(time.Duration, string, ...interface{}) (interface{}, error) {
|
||||
return nil, ec.err
|
||||
}
|
||||
func (ec errorConn) Send(string, ...interface{}) error { return ec.err }
|
||||
func (ec errorConn) Err() error { return ec.err }
|
||||
func (ec errorConn) Close() error { return nil }
|
||||
func (ec errorConn) Flush() error { return ec.err }
|
||||
func (ec errorConn) Receive() (interface{}, error) { return nil, ec.err }
|
||||
func (ec errorConn) ReceiveWithTimeout(time.Duration) (interface{}, error) { return nil, ec.err }
|
||||
|
||||
type idleList struct {
|
||||
count int
|
||||
front, back *poolConn
|
||||
}
|
||||
|
||||
type poolConn struct {
|
||||
c Conn
|
||||
t time.Time
|
||||
created time.Time
|
||||
next, prev *poolConn
|
||||
}
|
||||
|
||||
func (l *idleList) pushFront(pc *poolConn) {
|
||||
pc.next = l.front
|
||||
pc.prev = nil
|
||||
if l.count == 0 {
|
||||
l.back = pc
|
||||
} else {
|
||||
l.front.prev = pc
|
||||
}
|
||||
l.front = pc
|
||||
l.count++
|
||||
return
|
||||
}
|
||||
|
||||
func (l *idleList) popFront() {
|
||||
pc := l.front
|
||||
l.count--
|
||||
if l.count == 0 {
|
||||
l.front, l.back = nil, nil
|
||||
} else {
|
||||
pc.next.prev = nil
|
||||
l.front = pc.next
|
||||
}
|
||||
pc.next, pc.prev = nil, nil
|
||||
}
|
||||
|
||||
func (l *idleList) popBack() {
|
||||
pc := l.back
|
||||
l.count--
|
||||
if l.count == 0 {
|
||||
l.front, l.back = nil, nil
|
||||
} else {
|
||||
pc.prev.next = nil
|
||||
l.back = pc.prev
|
||||
}
|
||||
pc.next, pc.prev = nil, nil
|
||||
}
|
|
@ -16,11 +16,11 @@ package redis
|
|||
|
||||
import (
|
||||
"errors"
|
||||
"time"
|
||||
)
|
||||
|
||||
// Subscription represents a subscribe or unsubscribe notification.
|
||||
type Subscription struct {
|
||||
|
||||
// Kind is "subscribe", "unsubscribe", "psubscribe" or "punsubscribe"
|
||||
Kind string
|
||||
|
||||
|
@ -33,25 +33,19 @@ type Subscription struct {
|
|||
|
||||
// Message represents a message notification.
|
||||
type Message struct {
|
||||
|
||||
// The originating channel.
|
||||
Channel string
|
||||
|
||||
// The matched pattern, if any
|
||||
Pattern string
|
||||
|
||||
// The message data.
|
||||
Data []byte
|
||||
}
|
||||
|
||||
// PMessage represents a pmessage notification.
|
||||
type PMessage struct {
|
||||
|
||||
// The matched pattern.
|
||||
Pattern string
|
||||
|
||||
// The originating channel.
|
||||
Channel string
|
||||
|
||||
// The message data.
|
||||
Data []byte
|
||||
// Pong represents a pubsub pong notification.
|
||||
type Pong struct {
|
||||
Data string
|
||||
}
|
||||
|
||||
// PubSubConn wraps a Conn with convenience methods for subscribers.
|
||||
|
@ -90,11 +84,30 @@ func (c PubSubConn) PUnsubscribe(channel ...interface{}) error {
|
|||
return c.Conn.Flush()
|
||||
}
|
||||
|
||||
// Receive returns a pushed message as a Subscription, Message, PMessage or
|
||||
// error. The return value is intended to be used directly in a type switch as
|
||||
// Ping sends a PING to the server with the specified data.
|
||||
//
|
||||
// The connection must be subscribed to at least one channel or pattern when
|
||||
// calling this method.
|
||||
func (c PubSubConn) Ping(data string) error {
|
||||
c.Conn.Send("PING", data)
|
||||
return c.Conn.Flush()
|
||||
}
|
||||
|
||||
// Receive returns a pushed message as a Subscription, Message, Pong or error.
|
||||
// The return value is intended to be used directly in a type switch as
|
||||
// illustrated in the PubSubConn example.
|
||||
func (c PubSubConn) Receive() interface{} {
|
||||
reply, err := Values(c.Conn.Receive())
|
||||
return c.receiveInternal(c.Conn.Receive())
|
||||
}
|
||||
|
||||
// ReceiveWithTimeout is like Receive, but it allows the application to
|
||||
// override the connection's default timeout.
|
||||
func (c PubSubConn) ReceiveWithTimeout(timeout time.Duration) interface{} {
|
||||
return c.receiveInternal(ReceiveWithTimeout(c.Conn, timeout))
|
||||
}
|
||||
|
||||
func (c PubSubConn) receiveInternal(replyArg interface{}, errArg error) interface{} {
|
||||
reply, err := Values(replyArg, errArg)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
|
@ -113,17 +126,23 @@ func (c PubSubConn) Receive() interface{} {
|
|||
}
|
||||
return m
|
||||
case "pmessage":
|
||||
var pm PMessage
|
||||
if _, err := Scan(reply, &pm.Pattern, &pm.Channel, &pm.Data); err != nil {
|
||||
var m Message
|
||||
if _, err := Scan(reply, &m.Pattern, &m.Channel, &m.Data); err != nil {
|
||||
return err
|
||||
}
|
||||
return pm
|
||||
return m
|
||||
case "subscribe", "psubscribe", "unsubscribe", "punsubscribe":
|
||||
s := Subscription{Kind: kind}
|
||||
if _, err := Scan(reply, &s.Channel, &s.Count); err != nil {
|
||||
return err
|
||||
}
|
||||
return s
|
||||
case "pong":
|
||||
var p Pong
|
||||
if _, err := Scan(reply, &p.Data); err != nil {
|
||||
return err
|
||||
}
|
||||
return p
|
||||
}
|
||||
return errors.New("redigo: unknown pubsub notification")
|
||||
}
|
|
@ -0,0 +1,138 @@
|
|||
// Copyright 2012 Gary Burd
|
||||
//
|
||||
// Licensed under the Apache License, Version 2.0 (the "License"): you may
|
||||
// not use this file except in compliance with the License. You may obtain
|
||||
// a copy of the License at
|
||||
//
|
||||
// http://www.apache.org/licenses/LICENSE-2.0
|
||||
//
|
||||
// Unless required by applicable law or agreed to in writing, software
|
||||
// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
|
||||
// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
|
||||
// License for the specific language governing permissions and limitations
|
||||
// under the License.
|
||||
|
||||
package redis
|
||||
|
||||
import (
|
||||
"errors"
|
||||
"time"
|
||||
)
|
||||
|
||||
// Error represents an error returned in a command reply.
|
||||
type Error string
|
||||
|
||||
func (err Error) Error() string { return string(err) }
|
||||
|
||||
// Conn represents a connection to a Redis server.
|
||||
type Conn interface {
|
||||
// Close closes the connection.
|
||||
Close() error
|
||||
|
||||
// Err returns a non-nil value when the connection is not usable.
|
||||
Err() error
|
||||
|
||||
// Do sends a command to the server and returns the received reply.
|
||||
Do(commandName string, args ...interface{}) (reply interface{}, err error)
|
||||
|
||||
// Send writes the command to the client's output buffer.
|
||||
Send(commandName string, args ...interface{}) error
|
||||
|
||||
// Flush flushes the output buffer to the Redis server.
|
||||
Flush() error
|
||||
|
||||
// Receive receives a single reply from the Redis server
|
||||
Receive() (reply interface{}, err error)
|
||||
}
|
||||
|
||||
// Argument is the interface implemented by an object which wants to control how
|
||||
// the object is converted to Redis bulk strings.
|
||||
type Argument interface {
|
||||
// RedisArg returns a value to be encoded as a bulk string per the
|
||||
// conversions listed in the section 'Executing Commands'.
|
||||
// Implementations should typically return a []byte or string.
|
||||
RedisArg() interface{}
|
||||
}
|
||||
|
||||
// Scanner is implemented by an object which wants to control its value is
|
||||
// interpreted when read from Redis.
|
||||
type Scanner interface {
|
||||
// RedisScan assigns a value from a Redis value. The argument src is one of
|
||||
// the reply types listed in the section `Executing Commands`.
|
||||
//
|
||||
// An error should be returned if the value cannot be stored without
|
||||
// loss of information.
|
||||
RedisScan(src interface{}) error
|
||||
}
|
||||
|
||||
// ConnWithTimeout is an optional interface that allows the caller to override
|
||||
// a connection's default read timeout. This interface is useful for executing
|
||||
// the BLPOP, BRPOP, BRPOPLPUSH, XREAD and other commands that block at the
|
||||
// server.
|
||||
//
|
||||
// A connection's default read timeout is set with the DialReadTimeout dial
|
||||
// option. Applications should rely on the default timeout for commands that do
|
||||
// not block at the server.
|
||||
//
|
||||
// All of the Conn implementations in this package satisfy the ConnWithTimeout
|
||||
// interface.
|
||||
//
|
||||
// Use the DoWithTimeout and ReceiveWithTimeout helper functions to simplify
|
||||
// use of this interface.
|
||||
type ConnWithTimeout interface {
|
||||
Conn
|
||||
|
||||
// Do sends a command to the server and returns the received reply.
|
||||
// The timeout overrides the read timeout set when dialing the
|
||||
// connection.
|
||||
DoWithTimeout(timeout time.Duration, commandName string, args ...interface{}) (reply interface{}, err error)
|
||||
|
||||
// Receive receives a single reply from the Redis server. The timeout
|
||||
// overrides the read timeout set when dialing the connection.
|
||||
ReceiveWithTimeout(timeout time.Duration) (reply interface{}, err error)
|
||||
}
|
||||
|
||||
var errTimeoutNotSupported = errors.New("redis: connection does not support ConnWithTimeout")
|
||||
|
||||
// DoWithTimeout executes a Redis command with the specified read timeout. If
|
||||
// the connection does not satisfy the ConnWithTimeout interface, then an error
|
||||
// is returned.
|
||||
func DoWithTimeout(c Conn, timeout time.Duration, cmd string, args ...interface{}) (interface{}, error) {
|
||||
cwt, ok := c.(ConnWithTimeout)
|
||||
if !ok {
|
||||
return nil, errTimeoutNotSupported
|
||||
}
|
||||
return cwt.DoWithTimeout(timeout, cmd, args...)
|
||||
}
|
||||
|
||||
// ReceiveWithTimeout receives a reply with the specified read timeout. If the
|
||||
// connection does not satisfy the ConnWithTimeout interface, then an error is
|
||||
// returned.
|
||||
func ReceiveWithTimeout(c Conn, timeout time.Duration) (interface{}, error) {
|
||||
cwt, ok := c.(ConnWithTimeout)
|
||||
if !ok {
|
||||
return nil, errTimeoutNotSupported
|
||||
}
|
||||
return cwt.ReceiveWithTimeout(timeout)
|
||||
}
|
||||
|
||||
// SlowLog represents a redis SlowLog
|
||||
type SlowLog struct {
|
||||
// ID is a unique progressive identifier for every slow log entry.
|
||||
ID int64
|
||||
|
||||
// Time is the unix timestamp at which the logged command was processed.
|
||||
Time time.Time
|
||||
|
||||
// ExecutationTime is the amount of time needed for the command execution.
|
||||
ExecutionTime time.Duration
|
||||
|
||||
// Args is the command name and arguments
|
||||
Args []string
|
||||
|
||||
// ClientAddr is the client IP address (4.0 only).
|
||||
ClientAddr string
|
||||
|
||||
// ClientName is the name set via the CLIENT SETNAME command (4.0 only).
|
||||
ClientName string
|
||||
}
|
|
@ -0,0 +1,583 @@
|
|||
// Copyright 2012 Gary Burd
|
||||
//
|
||||
// Licensed under the Apache License, Version 2.0 (the "License"): you may
|
||||
// not use this file except in compliance with the License. You may obtain
|
||||
// a copy of the License at
|
||||
//
|
||||
// http://www.apache.org/licenses/LICENSE-2.0
|
||||
//
|
||||
// Unless required by applicable law or agreed to in writing, software
|
||||
// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
|
||||
// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
|
||||
// License for the specific language governing permissions and limitations
|
||||
// under the License.
|
||||
|
||||
package redis
|
||||
|
||||
import (
|
||||
"errors"
|
||||
"fmt"
|
||||
"strconv"
|
||||
"time"
|
||||
)
|
||||
|
||||
// ErrNil indicates that a reply value is nil.
|
||||
var ErrNil = errors.New("redigo: nil returned")
|
||||
|
||||
// Int is a helper that converts a command reply to an integer. If err is not
|
||||
// equal to nil, then Int returns 0, err. Otherwise, Int converts the
|
||||
// reply to an int as follows:
|
||||
//
|
||||
// Reply type Result
|
||||
// integer int(reply), nil
|
||||
// bulk string parsed reply, nil
|
||||
// nil 0, ErrNil
|
||||
// other 0, error
|
||||
func Int(reply interface{}, err error) (int, error) {
|
||||
if err != nil {
|
||||
return 0, err
|
||||
}
|
||||
switch reply := reply.(type) {
|
||||
case int64:
|
||||
x := int(reply)
|
||||
if int64(x) != reply {
|
||||
return 0, strconv.ErrRange
|
||||
}
|
||||
return x, nil
|
||||
case []byte:
|
||||
n, err := strconv.ParseInt(string(reply), 10, 0)
|
||||
return int(n), err
|
||||
case nil:
|
||||
return 0, ErrNil
|
||||
case Error:
|
||||
return 0, reply
|
||||
}
|
||||
return 0, fmt.Errorf("redigo: unexpected type for Int, got type %T", reply)
|
||||
}
|
||||
|
||||
// Int64 is a helper that converts a command reply to 64 bit integer. If err is
|
||||
// not equal to nil, then Int64 returns 0, err. Otherwise, Int64 converts the
|
||||
// reply to an int64 as follows:
|
||||
//
|
||||
// Reply type Result
|
||||
// integer reply, nil
|
||||
// bulk string parsed reply, nil
|
||||
// nil 0, ErrNil
|
||||
// other 0, error
|
||||
func Int64(reply interface{}, err error) (int64, error) {
|
||||
if err != nil {
|
||||
return 0, err
|
||||
}
|
||||
switch reply := reply.(type) {
|
||||
case int64:
|
||||
return reply, nil
|
||||
case []byte:
|
||||
n, err := strconv.ParseInt(string(reply), 10, 64)
|
||||
return n, err
|
||||
case nil:
|
||||
return 0, ErrNil
|
||||
case Error:
|
||||
return 0, reply
|
||||
}
|
||||
return 0, fmt.Errorf("redigo: unexpected type for Int64, got type %T", reply)
|
||||
}
|
||||
|
||||
func errNegativeInt(v int64) error {
|
||||
return fmt.Errorf("redigo: unexpected negative value %v for Uint64", v)
|
||||
}
|
||||
|
||||
// Uint64 is a helper that converts a command reply to 64 bit unsigned integer.
|
||||
// If err is not equal to nil, then Uint64 returns 0, err. Otherwise, Uint64 converts the
|
||||
// reply to an uint64 as follows:
|
||||
//
|
||||
// Reply type Result
|
||||
// +integer reply, nil
|
||||
// bulk string parsed reply, nil
|
||||
// nil 0, ErrNil
|
||||
// other 0, error
|
||||
func Uint64(reply interface{}, err error) (uint64, error) {
|
||||
if err != nil {
|
||||
return 0, err
|
||||
}
|
||||
switch reply := reply.(type) {
|
||||
case int64:
|
||||
if reply < 0 {
|
||||
return 0, errNegativeInt(reply)
|
||||
}
|
||||
return uint64(reply), nil
|
||||
case []byte:
|
||||
n, err := strconv.ParseUint(string(reply), 10, 64)
|
||||
return n, err
|
||||
case nil:
|
||||
return 0, ErrNil
|
||||
case Error:
|
||||
return 0, reply
|
||||
}
|
||||
return 0, fmt.Errorf("redigo: unexpected type for Uint64, got type %T", reply)
|
||||
}
|
||||
|
||||
// Float64 is a helper that converts a command reply to 64 bit float. If err is
|
||||
// not equal to nil, then Float64 returns 0, err. Otherwise, Float64 converts
|
||||
// the reply to an int as follows:
|
||||
//
|
||||
// Reply type Result
|
||||
// bulk string parsed reply, nil
|
||||
// nil 0, ErrNil
|
||||
// other 0, error
|
||||
func Float64(reply interface{}, err error) (float64, error) {
|
||||
if err != nil {
|
||||
return 0, err
|
||||
}
|
||||
switch reply := reply.(type) {
|
||||
case []byte:
|
||||
n, err := strconv.ParseFloat(string(reply), 64)
|
||||
return n, err
|
||||
case nil:
|
||||
return 0, ErrNil
|
||||
case Error:
|
||||
return 0, reply
|
||||
}
|
||||
return 0, fmt.Errorf("redigo: unexpected type for Float64, got type %T", reply)
|
||||
}
|
||||
|
||||
// String is a helper that converts a command reply to a string. If err is not
|
||||
// equal to nil, then String returns "", err. Otherwise String converts the
|
||||
// reply to a string as follows:
|
||||
//
|
||||
// Reply type Result
|
||||
// bulk string string(reply), nil
|
||||
// simple string reply, nil
|
||||
// nil "", ErrNil
|
||||
// other "", error
|
||||
func String(reply interface{}, err error) (string, error) {
|
||||
if err != nil {
|
||||
return "", err
|
||||
}
|
||||
switch reply := reply.(type) {
|
||||
case []byte:
|
||||
return string(reply), nil
|
||||
case string:
|
||||
return reply, nil
|
||||
case nil:
|
||||
return "", ErrNil
|
||||
case Error:
|
||||
return "", reply
|
||||
}
|
||||
return "", fmt.Errorf("redigo: unexpected type for String, got type %T", reply)
|
||||
}
|
||||
|
||||
// Bytes is a helper that converts a command reply to a slice of bytes. If err
|
||||
// is not equal to nil, then Bytes returns nil, err. Otherwise Bytes converts
|
||||
// the reply to a slice of bytes as follows:
|
||||
//
|
||||
// Reply type Result
|
||||
// bulk string reply, nil
|
||||
// simple string []byte(reply), nil
|
||||
// nil nil, ErrNil
|
||||
// other nil, error
|
||||
func Bytes(reply interface{}, err error) ([]byte, error) {
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
switch reply := reply.(type) {
|
||||
case []byte:
|
||||
return reply, nil
|
||||
case string:
|
||||
return []byte(reply), nil
|
||||
case nil:
|
||||
return nil, ErrNil
|
||||
case Error:
|
||||
return nil, reply
|
||||
}
|
||||
return nil, fmt.Errorf("redigo: unexpected type for Bytes, got type %T", reply)
|
||||
}
|
||||
|
||||
// Bool is a helper that converts a command reply to a boolean. If err is not
|
||||
// equal to nil, then Bool returns false, err. Otherwise Bool converts the
|
||||
// reply to boolean as follows:
|
||||
//
|
||||
// Reply type Result
|
||||
// integer value != 0, nil
|
||||
// bulk string strconv.ParseBool(reply)
|
||||
// nil false, ErrNil
|
||||
// other false, error
|
||||
func Bool(reply interface{}, err error) (bool, error) {
|
||||
if err != nil {
|
||||
return false, err
|
||||
}
|
||||
switch reply := reply.(type) {
|
||||
case int64:
|
||||
return reply != 0, nil
|
||||
case []byte:
|
||||
return strconv.ParseBool(string(reply))
|
||||
case nil:
|
||||
return false, ErrNil
|
||||
case Error:
|
||||
return false, reply
|
||||
}
|
||||
return false, fmt.Errorf("redigo: unexpected type for Bool, got type %T", reply)
|
||||
}
|
||||
|
||||
// MultiBulk is a helper that converts an array command reply to a []interface{}.
|
||||
//
|
||||
// Deprecated: Use Values instead.
|
||||
func MultiBulk(reply interface{}, err error) ([]interface{}, error) { return Values(reply, err) }
|
||||
|
||||
// Values is a helper that converts an array command reply to a []interface{}.
|
||||
// If err is not equal to nil, then Values returns nil, err. Otherwise, Values
|
||||
// converts the reply as follows:
|
||||
//
|
||||
// Reply type Result
|
||||
// array reply, nil
|
||||
// nil nil, ErrNil
|
||||
// other nil, error
|
||||
func Values(reply interface{}, err error) ([]interface{}, error) {
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
switch reply := reply.(type) {
|
||||
case []interface{}:
|
||||
return reply, nil
|
||||
case nil:
|
||||
return nil, ErrNil
|
||||
case Error:
|
||||
return nil, reply
|
||||
}
|
||||
return nil, fmt.Errorf("redigo: unexpected type for Values, got type %T", reply)
|
||||
}
|
||||
|
||||
func sliceHelper(reply interface{}, err error, name string, makeSlice func(int), assign func(int, interface{}) error) error {
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
switch reply := reply.(type) {
|
||||
case []interface{}:
|
||||
makeSlice(len(reply))
|
||||
for i := range reply {
|
||||
if reply[i] == nil {
|
||||
continue
|
||||
}
|
||||
if err := assign(i, reply[i]); err != nil {
|
||||
return err
|
||||
}
|
||||
}
|
||||
return nil
|
||||
case nil:
|
||||
return ErrNil
|
||||
case Error:
|
||||
return reply
|
||||
}
|
||||
return fmt.Errorf("redigo: unexpected type for %s, got type %T", name, reply)
|
||||
}
|
||||
|
||||
// Float64s is a helper that converts an array command reply to a []float64. If
|
||||
// err is not equal to nil, then Float64s returns nil, err. Nil array items are
|
||||
// converted to 0 in the output slice. Floats64 returns an error if an array
|
||||
// item is not a bulk string or nil.
|
||||
func Float64s(reply interface{}, err error) ([]float64, error) {
|
||||
var result []float64
|
||||
err = sliceHelper(reply, err, "Float64s", func(n int) { result = make([]float64, n) }, func(i int, v interface{}) error {
|
||||
p, ok := v.([]byte)
|
||||
if !ok {
|
||||
return fmt.Errorf("redigo: unexpected element type for Floats64, got type %T", v)
|
||||
}
|
||||
f, err := strconv.ParseFloat(string(p), 64)
|
||||
result[i] = f
|
||||
return err
|
||||
})
|
||||
return result, err
|
||||
}
|
||||
|
||||
// Strings is a helper that converts an array command reply to a []string. If
|
||||
// err is not equal to nil, then Strings returns nil, err. Nil array items are
|
||||
// converted to "" in the output slice. Strings returns an error if an array
|
||||
// item is not a bulk string or nil.
|
||||
func Strings(reply interface{}, err error) ([]string, error) {
|
||||
var result []string
|
||||
err = sliceHelper(reply, err, "Strings", func(n int) { result = make([]string, n) }, func(i int, v interface{}) error {
|
||||
switch v := v.(type) {
|
||||
case string:
|
||||
result[i] = v
|
||||
return nil
|
||||
case []byte:
|
||||
result[i] = string(v)
|
||||
return nil
|
||||
default:
|
||||
return fmt.Errorf("redigo: unexpected element type for Strings, got type %T", v)
|
||||
}
|
||||
})
|
||||
return result, err
|
||||
}
|
||||
|
||||
// ByteSlices is a helper that converts an array command reply to a [][]byte.
|
||||
// If err is not equal to nil, then ByteSlices returns nil, err. Nil array
|
||||
// items are stay nil. ByteSlices returns an error if an array item is not a
|
||||
// bulk string or nil.
|
||||
func ByteSlices(reply interface{}, err error) ([][]byte, error) {
|
||||
var result [][]byte
|
||||
err = sliceHelper(reply, err, "ByteSlices", func(n int) { result = make([][]byte, n) }, func(i int, v interface{}) error {
|
||||
p, ok := v.([]byte)
|
||||
if !ok {
|
||||
return fmt.Errorf("redigo: unexpected element type for ByteSlices, got type %T", v)
|
||||
}
|
||||
result[i] = p
|
||||
return nil
|
||||
})
|
||||
return result, err
|
||||
}
|
||||
|
||||
// Int64s is a helper that converts an array command reply to a []int64.
|
||||
// If err is not equal to nil, then Int64s returns nil, err. Nil array
|
||||
// items are stay nil. Int64s returns an error if an array item is not a
|
||||
// bulk string or nil.
|
||||
func Int64s(reply interface{}, err error) ([]int64, error) {
|
||||
var result []int64
|
||||
err = sliceHelper(reply, err, "Int64s", func(n int) { result = make([]int64, n) }, func(i int, v interface{}) error {
|
||||
switch v := v.(type) {
|
||||
case int64:
|
||||
result[i] = v
|
||||
return nil
|
||||
case []byte:
|
||||
n, err := strconv.ParseInt(string(v), 10, 64)
|
||||
result[i] = n
|
||||
return err
|
||||
default:
|
||||
return fmt.Errorf("redigo: unexpected element type for Int64s, got type %T", v)
|
||||
}
|
||||
})
|
||||
return result, err
|
||||
}
|
||||
|
||||
// Ints is a helper that converts an array command reply to a []in.
|
||||
// If err is not equal to nil, then Ints returns nil, err. Nil array
|
||||
// items are stay nil. Ints returns an error if an array item is not a
|
||||
// bulk string or nil.
|
||||
func Ints(reply interface{}, err error) ([]int, error) {
|
||||
var result []int
|
||||
err = sliceHelper(reply, err, "Ints", func(n int) { result = make([]int, n) }, func(i int, v interface{}) error {
|
||||
switch v := v.(type) {
|
||||
case int64:
|
||||
n := int(v)
|
||||
if int64(n) != v {
|
||||
return strconv.ErrRange
|
||||
}
|
||||
result[i] = n
|
||||
return nil
|
||||
case []byte:
|
||||
n, err := strconv.Atoi(string(v))
|
||||
result[i] = n
|
||||
return err
|
||||
default:
|
||||
return fmt.Errorf("redigo: unexpected element type for Ints, got type %T", v)
|
||||
}
|
||||
})
|
||||
return result, err
|
||||
}
|
||||
|
||||
// StringMap is a helper that converts an array of strings (alternating key, value)
|
||||
// into a map[string]string. The HGETALL and CONFIG GET commands return replies in this format.
|
||||
// Requires an even number of values in result.
|
||||
func StringMap(result interface{}, err error) (map[string]string, error) {
|
||||
values, err := Values(result, err)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
if len(values)%2 != 0 {
|
||||
return nil, errors.New("redigo: StringMap expects even number of values result")
|
||||
}
|
||||
m := make(map[string]string, len(values)/2)
|
||||
for i := 0; i < len(values); i += 2 {
|
||||
key, okKey := values[i].([]byte)
|
||||
value, okValue := values[i+1].([]byte)
|
||||
if !okKey || !okValue {
|
||||
return nil, errors.New("redigo: StringMap key not a bulk string value")
|
||||
}
|
||||
m[string(key)] = string(value)
|
||||
}
|
||||
return m, nil
|
||||
}
|
||||
|
||||
// IntMap is a helper that converts an array of strings (alternating key, value)
|
||||
// into a map[string]int. The HGETALL commands return replies in this format.
|
||||
// Requires an even number of values in result.
|
||||
func IntMap(result interface{}, err error) (map[string]int, error) {
|
||||
values, err := Values(result, err)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
if len(values)%2 != 0 {
|
||||
return nil, errors.New("redigo: IntMap expects even number of values result")
|
||||
}
|
||||
m := make(map[string]int, len(values)/2)
|
||||
for i := 0; i < len(values); i += 2 {
|
||||
key, ok := values[i].([]byte)
|
||||
if !ok {
|
||||
return nil, errors.New("redigo: IntMap key not a bulk string value")
|
||||
}
|
||||
value, err := Int(values[i+1], nil)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
m[string(key)] = value
|
||||
}
|
||||
return m, nil
|
||||
}
|
||||
|
||||
// Int64Map is a helper that converts an array of strings (alternating key, value)
|
||||
// into a map[string]int64. The HGETALL commands return replies in this format.
|
||||
// Requires an even number of values in result.
|
||||
func Int64Map(result interface{}, err error) (map[string]int64, error) {
|
||||
values, err := Values(result, err)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
if len(values)%2 != 0 {
|
||||
return nil, errors.New("redigo: Int64Map expects even number of values result")
|
||||
}
|
||||
m := make(map[string]int64, len(values)/2)
|
||||
for i := 0; i < len(values); i += 2 {
|
||||
key, ok := values[i].([]byte)
|
||||
if !ok {
|
||||
return nil, errors.New("redigo: Int64Map key not a bulk string value")
|
||||
}
|
||||
value, err := Int64(values[i+1], nil)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
m[string(key)] = value
|
||||
}
|
||||
return m, nil
|
||||
}
|
||||
|
||||
// Positions is a helper that converts an array of positions (lat, long)
|
||||
// into a [][2]float64. The GEOPOS command returns replies in this format.
|
||||
func Positions(result interface{}, err error) ([]*[2]float64, error) {
|
||||
values, err := Values(result, err)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
positions := make([]*[2]float64, len(values))
|
||||
for i := range values {
|
||||
if values[i] == nil {
|
||||
continue
|
||||
}
|
||||
p, ok := values[i].([]interface{})
|
||||
if !ok {
|
||||
return nil, fmt.Errorf("redigo: unexpected element type for interface slice, got type %T", values[i])
|
||||
}
|
||||
if len(p) != 2 {
|
||||
return nil, fmt.Errorf("redigo: unexpected number of values for a member position, got %d", len(p))
|
||||
}
|
||||
lat, err := Float64(p[0], nil)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
long, err := Float64(p[1], nil)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
positions[i] = &[2]float64{lat, long}
|
||||
}
|
||||
return positions, nil
|
||||
}
|
||||
|
||||
// Uint64s is a helper that converts an array command reply to a []uint64.
|
||||
// If err is not equal to nil, then Uint64s returns nil, err. Nil array
|
||||
// items are stay nil. Uint64s returns an error if an array item is not a
|
||||
// bulk string or nil.
|
||||
func Uint64s(reply interface{}, err error) ([]uint64, error) {
|
||||
var result []uint64
|
||||
err = sliceHelper(reply, err, "Uint64s", func(n int) { result = make([]uint64, n) }, func(i int, v interface{}) error {
|
||||
switch v := v.(type) {
|
||||
case uint64:
|
||||
result[i] = v
|
||||
return nil
|
||||
case []byte:
|
||||
n, err := strconv.ParseUint(string(v), 10, 64)
|
||||
result[i] = n
|
||||
return err
|
||||
default:
|
||||
return fmt.Errorf("redigo: unexpected element type for Uint64s, got type %T", v)
|
||||
}
|
||||
})
|
||||
return result, err
|
||||
}
|
||||
|
||||
// Uint64Map is a helper that converts an array of strings (alternating key, value)
|
||||
// into a map[string]uint64. The HGETALL commands return replies in this format.
|
||||
// Requires an even number of values in result.
|
||||
func Uint64Map(result interface{}, err error) (map[string]uint64, error) {
|
||||
values, err := Values(result, err)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
if len(values)%2 != 0 {
|
||||
return nil, errors.New("redigo: Uint64Map expects even number of values result")
|
||||
}
|
||||
m := make(map[string]uint64, len(values)/2)
|
||||
for i := 0; i < len(values); i += 2 {
|
||||
key, ok := values[i].([]byte)
|
||||
if !ok {
|
||||
return nil, errors.New("redigo: Uint64Map key not a bulk string value")
|
||||
}
|
||||
value, err := Uint64(values[i+1], nil)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
m[string(key)] = value
|
||||
}
|
||||
return m, nil
|
||||
}
|
||||
|
||||
// SlowLogs is a helper that parse the SLOWLOG GET command output and
|
||||
// return the array of SlowLog
|
||||
func SlowLogs(result interface{}, err error) ([]SlowLog, error) {
|
||||
rawLogs, err := Values(result, err)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
logs := make([]SlowLog, len(rawLogs))
|
||||
for i, rawLog := range rawLogs {
|
||||
rawLog, ok := rawLog.([]interface{})
|
||||
if !ok {
|
||||
return nil, errors.New("redigo: slowlog element is not an array")
|
||||
}
|
||||
|
||||
var log SlowLog
|
||||
|
||||
if len(rawLog) < 4 {
|
||||
return nil, errors.New("redigo: slowlog element has less than four elements")
|
||||
}
|
||||
log.ID, ok = rawLog[0].(int64)
|
||||
if !ok {
|
||||
return nil, errors.New("redigo: slowlog element[0] not an int64")
|
||||
}
|
||||
timestamp, ok := rawLog[1].(int64)
|
||||
if !ok {
|
||||
return nil, errors.New("redigo: slowlog element[1] not an int64")
|
||||
}
|
||||
log.Time = time.Unix(timestamp, 0)
|
||||
duration, ok := rawLog[2].(int64)
|
||||
if !ok {
|
||||
return nil, errors.New("redigo: slowlog element[2] not an int64")
|
||||
}
|
||||
log.ExecutionTime = time.Duration(duration) * time.Microsecond
|
||||
|
||||
log.Args, err = Strings(rawLog[3], nil)
|
||||
if err != nil {
|
||||
return nil, fmt.Errorf("redigo: slowlog element[3] is not array of string. actual error is : %s", err.Error())
|
||||
}
|
||||
if len(rawLog) >= 6 {
|
||||
log.ClientAddr, err = String(rawLog[4], nil)
|
||||
if err != nil {
|
||||
return nil, fmt.Errorf("redigo: slowlog element[4] is not a string. actual error is : %s", err.Error())
|
||||
}
|
||||
log.ClientName, err = String(rawLog[5], nil)
|
||||
if err != nil {
|
||||
return nil, fmt.Errorf("redigo: slowlog element[5] is not a string. actual error is : %s", err.Error())
|
||||
}
|
||||
}
|
||||
logs[i] = log
|
||||
}
|
||||
return logs, nil
|
||||
}
|
|
@ -23,6 +23,10 @@ import (
|
|||
"sync"
|
||||
)
|
||||
|
||||
var (
|
||||
scannerType = reflect.TypeOf((*Scanner)(nil)).Elem()
|
||||
)
|
||||
|
||||
func ensureLen(d reflect.Value, n int) {
|
||||
if n > d.Cap() {
|
||||
d.Set(reflect.MakeSlice(d.Type(), n, n))
|
||||
|
@ -32,42 +36,117 @@ func ensureLen(d reflect.Value, n int) {
|
|||
}
|
||||
|
||||
func cannotConvert(d reflect.Value, s interface{}) error {
|
||||
return fmt.Errorf("redigo: Scan cannot convert from %s to %s",
|
||||
reflect.TypeOf(s), d.Type())
|
||||
var sname string
|
||||
switch s.(type) {
|
||||
case string:
|
||||
sname = "Redis simple string"
|
||||
case Error:
|
||||
sname = "Redis error"
|
||||
case int64:
|
||||
sname = "Redis integer"
|
||||
case []byte:
|
||||
sname = "Redis bulk string"
|
||||
case []interface{}:
|
||||
sname = "Redis array"
|
||||
case nil:
|
||||
sname = "Redis nil"
|
||||
default:
|
||||
sname = reflect.TypeOf(s).String()
|
||||
}
|
||||
return fmt.Errorf("cannot convert from %s to %s", sname, d.Type())
|
||||
}
|
||||
|
||||
func convertAssignBytes(d reflect.Value, s []byte) (err error) {
|
||||
func convertAssignNil(d reflect.Value) (err error) {
|
||||
switch d.Type().Kind() {
|
||||
case reflect.Slice, reflect.Interface:
|
||||
d.Set(reflect.Zero(d.Type()))
|
||||
default:
|
||||
err = cannotConvert(d, nil)
|
||||
}
|
||||
return err
|
||||
}
|
||||
|
||||
func convertAssignError(d reflect.Value, s Error) (err error) {
|
||||
if d.Kind() == reflect.String {
|
||||
d.SetString(string(s))
|
||||
} else if d.Kind() == reflect.Slice && d.Type().Elem().Kind() == reflect.Uint8 {
|
||||
d.SetBytes([]byte(s))
|
||||
} else {
|
||||
err = cannotConvert(d, s)
|
||||
}
|
||||
return
|
||||
}
|
||||
|
||||
func convertAssignString(d reflect.Value, s string) (err error) {
|
||||
switch d.Type().Kind() {
|
||||
case reflect.Float32, reflect.Float64:
|
||||
var x float64
|
||||
x, err = strconv.ParseFloat(string(s), d.Type().Bits())
|
||||
x, err = strconv.ParseFloat(s, d.Type().Bits())
|
||||
d.SetFloat(x)
|
||||
case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
|
||||
var x int64
|
||||
x, err = strconv.ParseInt(string(s), 10, d.Type().Bits())
|
||||
x, err = strconv.ParseInt(s, 10, d.Type().Bits())
|
||||
d.SetInt(x)
|
||||
case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64:
|
||||
var x uint64
|
||||
x, err = strconv.ParseUint(string(s), 10, d.Type().Bits())
|
||||
x, err = strconv.ParseUint(s, 10, d.Type().Bits())
|
||||
d.SetUint(x)
|
||||
case reflect.Bool:
|
||||
var x bool
|
||||
x, err = strconv.ParseBool(string(s))
|
||||
x, err = strconv.ParseBool(s)
|
||||
d.SetBool(x)
|
||||
case reflect.String:
|
||||
d.SetString(string(s))
|
||||
d.SetString(s)
|
||||
case reflect.Slice:
|
||||
if d.Type().Elem().Kind() != reflect.Uint8 {
|
||||
err = cannotConvert(d, s)
|
||||
if d.Type().Elem().Kind() == reflect.Uint8 {
|
||||
d.SetBytes([]byte(s))
|
||||
} else {
|
||||
d.SetBytes(s)
|
||||
err = cannotConvert(d, s)
|
||||
}
|
||||
case reflect.Ptr:
|
||||
err = convertAssignString(d.Elem(), s)
|
||||
default:
|
||||
err = cannotConvert(d, s)
|
||||
}
|
||||
return
|
||||
}
|
||||
|
||||
func convertAssignBulkString(d reflect.Value, s []byte) (err error) {
|
||||
switch d.Type().Kind() {
|
||||
case reflect.Slice:
|
||||
// Handle []byte destination here to avoid unnecessary
|
||||
// []byte -> string -> []byte converion.
|
||||
if d.Type().Elem().Kind() == reflect.Uint8 {
|
||||
d.SetBytes(s)
|
||||
} else {
|
||||
err = cannotConvert(d, s)
|
||||
}
|
||||
case reflect.Ptr:
|
||||
if d.CanInterface() && d.CanSet() {
|
||||
if s == nil {
|
||||
if d.IsNil() {
|
||||
return nil
|
||||
}
|
||||
|
||||
d.Set(reflect.Zero(d.Type()))
|
||||
return nil
|
||||
}
|
||||
|
||||
if d.IsNil() {
|
||||
d.Set(reflect.New(d.Type().Elem()))
|
||||
}
|
||||
|
||||
if sc, ok := d.Interface().(Scanner); ok {
|
||||
return sc.RedisScan(s)
|
||||
}
|
||||
}
|
||||
err = convertAssignString(d, string(s))
|
||||
default:
|
||||
err = convertAssignString(d, string(s))
|
||||
}
|
||||
return err
|
||||
}
|
||||
|
||||
func convertAssignInt(d reflect.Value, s int64) (err error) {
|
||||
switch d.Type().Kind() {
|
||||
case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
|
||||
|
@ -96,18 +175,43 @@ func convertAssignInt(d reflect.Value, s int64) (err error) {
|
|||
}
|
||||
|
||||
func convertAssignValue(d reflect.Value, s interface{}) (err error) {
|
||||
if d.Kind() != reflect.Ptr {
|
||||
if d.CanAddr() {
|
||||
d2 := d.Addr()
|
||||
if d2.CanInterface() {
|
||||
if scanner, ok := d2.Interface().(Scanner); ok {
|
||||
return scanner.RedisScan(s)
|
||||
}
|
||||
}
|
||||
}
|
||||
} else if d.CanInterface() {
|
||||
// Already a reflect.Ptr
|
||||
if d.IsNil() {
|
||||
d.Set(reflect.New(d.Type().Elem()))
|
||||
}
|
||||
if scanner, ok := d.Interface().(Scanner); ok {
|
||||
return scanner.RedisScan(s)
|
||||
}
|
||||
}
|
||||
|
||||
switch s := s.(type) {
|
||||
case nil:
|
||||
err = convertAssignNil(d)
|
||||
case []byte:
|
||||
err = convertAssignBytes(d, s)
|
||||
err = convertAssignBulkString(d, s)
|
||||
case int64:
|
||||
err = convertAssignInt(d, s)
|
||||
case string:
|
||||
err = convertAssignString(d, s)
|
||||
case Error:
|
||||
err = convertAssignError(d, s)
|
||||
default:
|
||||
err = cannotConvert(d, s)
|
||||
}
|
||||
return err
|
||||
}
|
||||
|
||||
func convertAssignValues(d reflect.Value, s []interface{}) error {
|
||||
func convertAssignArray(d reflect.Value, s []interface{}) error {
|
||||
if d.Type().Kind() != reflect.Slice {
|
||||
return cannotConvert(d, s)
|
||||
}
|
||||
|
@ -121,11 +225,15 @@ func convertAssignValues(d reflect.Value, s []interface{}) error {
|
|||
}
|
||||
|
||||
func convertAssign(d interface{}, s interface{}) (err error) {
|
||||
if scanner, ok := d.(Scanner); ok {
|
||||
return scanner.RedisScan(s)
|
||||
}
|
||||
|
||||
// Handle the most common destination types using type switches and
|
||||
// fall back to reflection for all other types.
|
||||
switch s := s.(type) {
|
||||
case nil:
|
||||
// ingore
|
||||
// ignore
|
||||
case []byte:
|
||||
switch d := d.(type) {
|
||||
case *string:
|
||||
|
@ -144,7 +252,7 @@ func convertAssign(d interface{}, s interface{}) (err error) {
|
|||
if d := reflect.ValueOf(d); d.Type().Kind() != reflect.Ptr {
|
||||
err = cannotConvert(d, s)
|
||||
} else {
|
||||
err = convertAssignBytes(d.Elem(), s)
|
||||
err = convertAssignBulkString(d.Elem(), s)
|
||||
}
|
||||
}
|
||||
case int64:
|
||||
|
@ -169,6 +277,17 @@ func convertAssign(d interface{}, s interface{}) (err error) {
|
|||
err = convertAssignInt(d.Elem(), s)
|
||||
}
|
||||
}
|
||||
case string:
|
||||
switch d := d.(type) {
|
||||
case *string:
|
||||
*d = s
|
||||
case *interface{}:
|
||||
*d = s
|
||||
case nil:
|
||||
// skip value
|
||||
default:
|
||||
err = cannotConvert(reflect.ValueOf(d), s)
|
||||
}
|
||||
case []interface{}:
|
||||
switch d := d.(type) {
|
||||
case *[]interface{}:
|
||||
|
@ -181,7 +300,7 @@ func convertAssign(d interface{}, s interface{}) (err error) {
|
|||
if d := reflect.ValueOf(d); d.Type().Kind() != reflect.Ptr {
|
||||
err = cannotConvert(d, s)
|
||||
} else {
|
||||
err = convertAssignValues(d.Elem(), s)
|
||||
err = convertAssignArray(d.Elem(), s)
|
||||
}
|
||||
}
|
||||
case Error:
|
||||
|
@ -194,6 +313,8 @@ func convertAssign(d interface{}, s interface{}) (err error) {
|
|||
|
||||
// Scan copies from src to the values pointed at by dest.
|
||||
//
|
||||
// Scan uses RedisScan if available otherwise:
|
||||
//
|
||||
// The values pointed at by dest must be an integer, float, boolean, string,
|
||||
// []byte, interface{} or slices of these types. Scan uses the standard strconv
|
||||
// package to convert bulk strings to numeric and boolean types.
|
||||
|
@ -206,12 +327,13 @@ func convertAssign(d interface{}, s interface{}) (err error) {
|
|||
// following the copied values.
|
||||
func Scan(src []interface{}, dest ...interface{}) ([]interface{}, error) {
|
||||
if len(src) < len(dest) {
|
||||
return nil, errors.New("redigo: Scan array short")
|
||||
return nil, errors.New("redigo.Scan: array short")
|
||||
}
|
||||
var err error
|
||||
for i, d := range dest {
|
||||
err = convertAssign(d, src[i])
|
||||
if err != nil {
|
||||
err = fmt.Errorf("redigo.Scan: cannot assign to dest %d: %v", i, err)
|
||||
break
|
||||
}
|
||||
}
|
||||
|
@ -219,9 +341,9 @@ func Scan(src []interface{}, dest ...interface{}) ([]interface{}, error) {
|
|||
}
|
||||
|
||||
type fieldSpec struct {
|
||||
name string
|
||||
index []int
|
||||
//omitEmpty bool
|
||||
name string
|
||||
index []int
|
||||
omitEmpty bool
|
||||
}
|
||||
|
||||
type structSpec struct {
|
||||
|
@ -237,13 +359,17 @@ func compileStructSpec(t reflect.Type, depth map[string]int, index []int, ss *st
|
|||
for i := 0; i < t.NumField(); i++ {
|
||||
f := t.Field(i)
|
||||
switch {
|
||||
case f.PkgPath != "":
|
||||
case f.PkgPath != "" && !f.Anonymous:
|
||||
// Ignore unexported fields.
|
||||
case f.Anonymous:
|
||||
// TODO: Handle pointers. Requires change to decoder and
|
||||
// protection against infinite recursion.
|
||||
if f.Type.Kind() == reflect.Struct {
|
||||
switch f.Type.Kind() {
|
||||
case reflect.Struct:
|
||||
compileStructSpec(f.Type, depth, append(index, i), ss)
|
||||
case reflect.Ptr:
|
||||
// TODO(steve): Protect against infinite recursion.
|
||||
if f.Type.Elem().Kind() == reflect.Struct {
|
||||
compileStructSpec(f.Type.Elem(), depth, append(index, i), ss)
|
||||
}
|
||||
}
|
||||
default:
|
||||
fs := &fieldSpec{name: f.Name}
|
||||
|
@ -258,10 +384,10 @@ func compileStructSpec(t reflect.Type, depth map[string]int, index []int, ss *st
|
|||
}
|
||||
for _, s := range p[1:] {
|
||||
switch s {
|
||||
//case "omitempty":
|
||||
// fs.omitempty = true
|
||||
case "omitempty":
|
||||
fs.omitEmpty = true
|
||||
default:
|
||||
panic(errors.New("redigo: unknown field flag " + s + " for type " + t.Name()))
|
||||
panic(fmt.Errorf("redigo: unknown field tag %s for type %s", s, t.Name()))
|
||||
}
|
||||
}
|
||||
}
|
||||
|
@ -321,7 +447,7 @@ func structSpecForType(t reflect.Type) *structSpec {
|
|||
return ss
|
||||
}
|
||||
|
||||
var errScanStructValue = errors.New("redigo: ScanStruct value must be non-nil pointer to a struct")
|
||||
var errScanStructValue = errors.New("redigo.ScanStruct: value must be non-nil pointer to a struct")
|
||||
|
||||
// ScanStruct scans alternating names and values from src to a struct. The
|
||||
// HGETALL and CONFIG GET commands return replies in this format.
|
||||
|
@ -333,6 +459,7 @@ var errScanStructValue = errors.New("redigo: ScanStruct value must be non-nil po
|
|||
//
|
||||
// Fields with the tag redis:"-" are ignored.
|
||||
//
|
||||
// Each field uses RedisScan if available otherwise:
|
||||
// Integer, float, boolean, string and []byte fields are supported. Scan uses the
|
||||
// standard strconv package to convert bulk string values to numeric and
|
||||
// boolean types.
|
||||
|
@ -350,7 +477,7 @@ func ScanStruct(src []interface{}, dest interface{}) error {
|
|||
ss := structSpecForType(d.Type())
|
||||
|
||||
if len(src)%2 != 0 {
|
||||
return errors.New("redigo: ScanStruct expects even number of values in values")
|
||||
return errors.New("redigo.ScanStruct: number of values not a multiple of 2")
|
||||
}
|
||||
|
||||
for i := 0; i < len(src); i += 2 {
|
||||
|
@ -360,26 +487,30 @@ func ScanStruct(src []interface{}, dest interface{}) error {
|
|||
}
|
||||
name, ok := src[i].([]byte)
|
||||
if !ok {
|
||||
return errors.New("redigo: ScanStruct key not a bulk string value")
|
||||
return fmt.Errorf("redigo.ScanStruct: key %d not a bulk string value", i)
|
||||
}
|
||||
fs := ss.fieldSpec(name)
|
||||
if fs == nil {
|
||||
continue
|
||||
}
|
||||
if err := convertAssignValue(d.FieldByIndex(fs.index), s); err != nil {
|
||||
return err
|
||||
return fmt.Errorf("redigo.ScanStruct: cannot assign field %s: %v", fs.name, err)
|
||||
}
|
||||
}
|
||||
return nil
|
||||
}
|
||||
|
||||
var (
|
||||
errScanSliceValue = errors.New("redigo: ScanSlice dest must be non-nil pointer to a struct")
|
||||
errScanSliceValue = errors.New("redigo.ScanSlice: dest must be non-nil pointer to a struct")
|
||||
)
|
||||
|
||||
// ScanSlice scans src to the slice pointed to by dest. The elements the dest
|
||||
// slice must be integer, float, boolean, string, struct or pointer to struct
|
||||
// values.
|
||||
// ScanSlice scans src to the slice pointed to by dest.
|
||||
//
|
||||
// If the target is a slice of types which implement Scanner then the custom
|
||||
// RedisScan method is used otherwise the following rules apply:
|
||||
//
|
||||
// The elements in the dest slice must be integer, float, boolean, string, struct
|
||||
// or pointer to struct values.
|
||||
//
|
||||
// Struct fields must be integer, float, boolean or string values. All struct
|
||||
// fields are used unless a subset is specified using fieldNames.
|
||||
|
@ -395,19 +526,20 @@ func ScanSlice(src []interface{}, dest interface{}, fieldNames ...string) error
|
|||
|
||||
isPtr := false
|
||||
t := d.Type().Elem()
|
||||
st := t
|
||||
if t.Kind() == reflect.Ptr && t.Elem().Kind() == reflect.Struct {
|
||||
isPtr = true
|
||||
t = t.Elem()
|
||||
}
|
||||
|
||||
if t.Kind() != reflect.Struct {
|
||||
if t.Kind() != reflect.Struct || st.Implements(scannerType) {
|
||||
ensureLen(d, len(src))
|
||||
for i, s := range src {
|
||||
if s == nil {
|
||||
continue
|
||||
}
|
||||
if err := convertAssignValue(d.Index(i), s); err != nil {
|
||||
return err
|
||||
return fmt.Errorf("redigo.ScanSlice: cannot assign element %d: %v", i, err)
|
||||
}
|
||||
}
|
||||
return nil
|
||||
|
@ -420,18 +552,18 @@ func ScanSlice(src []interface{}, dest interface{}, fieldNames ...string) error
|
|||
for i, name := range fieldNames {
|
||||
fss[i] = ss.m[name]
|
||||
if fss[i] == nil {
|
||||
return errors.New("redigo: ScanSlice bad field name " + name)
|
||||
return fmt.Errorf("redigo.ScanSlice: ScanSlice bad field name %s", name)
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
if len(fss) == 0 {
|
||||
return errors.New("redigo: ScanSlice no struct fields")
|
||||
return errors.New("redigo.ScanSlice: no struct fields")
|
||||
}
|
||||
|
||||
n := len(src) / len(fss)
|
||||
if n*len(fss) != len(src) {
|
||||
return errors.New("redigo: ScanSlice length not a multiple of struct field count")
|
||||
return errors.New("redigo.ScanSlice: length not a multiple of struct field count")
|
||||
}
|
||||
|
||||
ensureLen(d, n)
|
||||
|
@ -449,7 +581,7 @@ func ScanSlice(src []interface{}, dest interface{}, fieldNames ...string) error
|
|||
continue
|
||||
}
|
||||
if err := convertAssignValue(d.FieldByIndex(fs.index), s); err != nil {
|
||||
return err
|
||||
return fmt.Errorf("redigo.ScanSlice: cannot assign element %d to field %s: %v", i*len(fss)+j, fs.name, err)
|
||||
}
|
||||
}
|
||||
}
|
||||
|
@ -507,7 +639,35 @@ func flattenStruct(args Args, v reflect.Value) Args {
|
|||
ss := structSpecForType(v.Type())
|
||||
for _, fs := range ss.l {
|
||||
fv := v.FieldByIndex(fs.index)
|
||||
args = append(args, fs.name, fv.Interface())
|
||||
if fs.omitEmpty {
|
||||
var empty = false
|
||||
switch fv.Kind() {
|
||||
case reflect.Array, reflect.Map, reflect.Slice, reflect.String:
|
||||
empty = fv.Len() == 0
|
||||
case reflect.Bool:
|
||||
empty = !fv.Bool()
|
||||
case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
|
||||
empty = fv.Int() == 0
|
||||
case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uintptr:
|
||||
empty = fv.Uint() == 0
|
||||
case reflect.Float32, reflect.Float64:
|
||||
empty = fv.Float() == 0
|
||||
case reflect.Interface, reflect.Ptr:
|
||||
empty = fv.IsNil()
|
||||
}
|
||||
if empty {
|
||||
continue
|
||||
}
|
||||
}
|
||||
if arg, ok := fv.Interface().(Argument); ok {
|
||||
args = append(args, fs.name, arg.RedisArg())
|
||||
} else if fv.Kind() == reflect.Ptr {
|
||||
if !fv.IsNil() {
|
||||
args = append(args, fs.name, fv.Elem().Interface())
|
||||
}
|
||||
} else {
|
||||
args = append(args, fs.name, fv.Interface())
|
||||
}
|
||||
}
|
||||
return args
|
||||
}
|
|
@ -55,6 +55,11 @@ func (s *Script) args(spec string, keysAndArgs []interface{}) []interface{} {
|
|||
return args
|
||||
}
|
||||
|
||||
// Hash returns the script hash.
|
||||
func (s *Script) Hash() string {
|
||||
return s.hash
|
||||
}
|
||||
|
||||
// Do evaluates the script. Under the covers, Do optimistically evaluates the
|
||||
// script using the EVALSHA command. If the command fails because the script is
|
||||
// not loaded, then Do evaluates the script using the EVAL command (thus
|
|
@ -79,11 +79,10 @@ github.com/docker/go-events
|
|||
github.com/docker/go-metrics
|
||||
# github.com/docker/libtrust v0.0.0-20150114040149-fa567046d9b1
|
||||
github.com/docker/libtrust
|
||||
# github.com/garyburd/redigo v0.0.0-20150301180006-535138d7bcd7
|
||||
github.com/garyburd/redigo/internal
|
||||
github.com/garyburd/redigo/redis
|
||||
# github.com/golang/protobuf v1.3.2
|
||||
github.com/golang/protobuf/proto
|
||||
# github.com/gomodule/redigo v1.8.2
|
||||
github.com/gomodule/redigo/redis
|
||||
# github.com/gorilla/handlers v0.0.0-20150720190736-60c7bfde3e33
|
||||
github.com/gorilla/handlers
|
||||
# github.com/gorilla/mux v1.7.2
|
||||
|
|
Loading…
Reference in New Issue