frostfs-http-gw/app.go

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package main
import (
"context"
"crypto/ecdsa"
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"crypto/elliptic"
"crypto/rand"
"strconv"
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"time"
"github.com/fasthttp/router"
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sdk "github.com/nspcc-dev/cdn-neofs-sdk"
"github.com/nspcc-dev/cdn-neofs-sdk/creds/neofs"
"github.com/nspcc-dev/cdn-neofs-sdk/logger"
"github.com/nspcc-dev/cdn-neofs-sdk/pool"
crypto "github.com/nspcc-dev/neofs-crypto"
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"github.com/spf13/viper"
"github.com/valyala/fasthttp"
"go.uber.org/zap"
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"google.golang.org/grpc"
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"google.golang.org/grpc/grpclog"
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"google.golang.org/grpc/keepalive"
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)
type (
app struct {
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cli sdk.Client
pool pool.Client
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log *zap.Logger
cfg *viper.Viper
key *ecdsa.PrivateKey
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wlog logger.Logger
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web *fasthttp.Server
jobDone chan struct{}
webDone chan struct{}
conTimeout time.Duration
reqTimeout time.Duration
}
App interface {
Wait()
Worker(context.Context)
Serve(context.Context)
}
Option func(a *app)
)
func WithLogger(l *zap.Logger) Option {
return func(a *app) {
if l == nil {
return
}
a.log = l
}
}
func WithConfig(c *viper.Viper) Option {
return func(a *app) {
if c == nil {
return
}
a.cfg = c
}
}
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func newApp(ctx context.Context, opt ...Option) App {
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a := &app{
log: zap.L(),
cfg: viper.GetViper(),
web: new(fasthttp.Server),
jobDone: make(chan struct{}),
webDone: make(chan struct{}),
}
for i := range opt {
opt[i](a)
}
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a.wlog = logger.GRPC(a.log)
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if a.cfg.GetBool("verbose") {
grpclog.SetLoggerV2(a.wlog)
}
a.conTimeout = a.cfg.GetDuration("connect_timeout")
a.reqTimeout = a.cfg.GetDuration("request_timeout")
// -- setup FastHTTP server: --
a.web.Name = "neofs-http-gate"
a.web.ReadBufferSize = a.cfg.GetInt("web.read_buffer_size")
a.web.WriteBufferSize = a.cfg.GetInt("web.write_buffer_size")
a.web.ReadTimeout = a.cfg.GetDuration("web.read_timeout")
a.web.WriteTimeout = a.cfg.GetDuration("web.write_timeout")
a.web.GetOnly = true
a.web.DisableHeaderNamesNormalizing = true
a.web.NoDefaultServerHeader = true
a.web.NoDefaultContentType = true
// -- -- -- -- -- -- -- -- -- --
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connections := make(map[string]float64)
for i := 0; ; i++ {
address := a.cfg.GetString("peers." + strconv.Itoa(i) + ".address")
weight := a.cfg.GetFloat64("peers." + strconv.Itoa(i) + ".weight")
if address == "" {
break
}
connections[address] = weight
}
cred, err := prepareCredentials(a.cfg.GetString("key"), a.log)
if err != nil {
a.log.Fatal("could not prepare credentials", zap.Error(err))
}
a.pool, err = pool.New(ctx,
pool.WithLogger(a.log),
pool.WithCredentials(cred),
pool.WithWeightPool(connections),
pool.WithGRPCOptions(
grpc.WithBlock(),
grpc.WithInsecure(),
grpc.WithKeepaliveParams(keepalive.ClientParameters{
Time: a.cfg.GetDuration("keepalive.time"),
Timeout: a.cfg.GetDuration("keepalive.timeout"),
PermitWithoutStream: a.cfg.GetBool("keepalive.permit_without_stream"),
})))
if err != nil {
a.log.Fatal("could not prepare connection pool", zap.Error(err))
}
a.cli, err = sdk.New(ctx,
sdk.WithLogger(a.log),
sdk.WithCredentials(cred),
sdk.WithConnectionPool(a.pool))
if err != nil {
a.log.Fatal("could not prepare sdk client", zap.Error(err))
}
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return a
}
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func prepareCredentials(key string, log *zap.Logger) (neofs.Credentials, error) {
if key == generated {
sk, err := ecdsa.GenerateKey(elliptic.P256(), rand.Reader)
if err != nil {
return nil, err
}
key, err = crypto.WIFEncode(sk)
if err != nil {
return nil, err
}
log.Info("generate new key", zap.String("wif", key))
}
return neofs.New(key)
}
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func (a *app) Wait() {
a.log.Info("application started")
select {
case <-a.jobDone: // wait for job is stopped
<-a.webDone
case <-a.webDone: // wait for web-server is stopped
<-a.jobDone
}
}
func (a *app) Worker(ctx context.Context) {
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a.pool.Worker(ctx)
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close(a.jobDone)
}
func (a *app) Serve(ctx context.Context) {
go func() {
<-ctx.Done()
a.log.Info("stop web-server", zap.Error(a.web.Shutdown()))
close(a.webDone)
}()
r := router.New()
r.RedirectTrailingSlash = true
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a.log.Info("enabled /get/{cid}/{oid}")
r.GET("/get/{cid}/{oid}", a.receiveFile)
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// attaching /-/(ready,healthy)
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attachHealthy(r, a.pool.Status)
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// enable metrics
if a.cfg.GetBool("metrics") {
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a.log.Info("enabled /metrics/")
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attachMetrics(r, a.wlog)
}
// enable pprof
if a.cfg.GetBool("pprof") {
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a.log.Info("enabled /debug/pprof/")
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attachProfiler(r)
}
bind := a.cfg.GetString("listen_address")
a.log.Info("run gateway server",
zap.String("address", bind))
a.web.Handler = r.Handler
if err := a.web.ListenAndServe(bind); err != nil {
a.log.Fatal("could not start server", zap.Error(err))
}
}