restic/vendor/github.com/Azure/azure-sdk-for-go/storage/appendblob.go
Alexander Neumann 61cb1cc6f8 Update vendored dependencies
This includes github.com/kurin/blazer 0.2.0, which resolves 
2017-10-01 10:13:39 +02:00

91 lines
3.3 KiB
Go

package storage
// Copyright 2017 Microsoft Corporation
//
// 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.
import (
"bytes"
"crypto/md5"
"encoding/base64"
"fmt"
"net/http"
"net/url"
"time"
)
// PutAppendBlob initializes an empty append blob with specified name. An
// append blob must be created using this method before appending blocks.
//
// See CreateBlockBlobFromReader for more info on creating blobs.
//
// See https://docs.microsoft.com/en-us/rest/api/storageservices/fileservices/Put-Blob
func (b *Blob) PutAppendBlob(options *PutBlobOptions) error {
params := url.Values{}
headers := b.Container.bsc.client.getStandardHeaders()
headers["x-ms-blob-type"] = string(BlobTypeAppend)
headers = mergeHeaders(headers, headersFromStruct(b.Properties))
headers = b.Container.bsc.client.addMetadataToHeaders(headers, b.Metadata)
if options != nil {
params = addTimeout(params, options.Timeout)
headers = mergeHeaders(headers, headersFromStruct(*options))
}
uri := b.Container.bsc.client.getEndpoint(blobServiceName, b.buildPath(), params)
resp, err := b.Container.bsc.client.exec(http.MethodPut, uri, headers, nil, b.Container.bsc.auth)
if err != nil {
return err
}
return b.respondCreation(resp, BlobTypeAppend)
}
// AppendBlockOptions includes the options for an append block operation
type AppendBlockOptions struct {
Timeout uint
LeaseID string `header:"x-ms-lease-id"`
MaxSize *uint `header:"x-ms-blob-condition-maxsize"`
AppendPosition *uint `header:"x-ms-blob-condition-appendpos"`
IfModifiedSince *time.Time `header:"If-Modified-Since"`
IfUnmodifiedSince *time.Time `header:"If-Unmodified-Since"`
IfMatch string `header:"If-Match"`
IfNoneMatch string `header:"If-None-Match"`
RequestID string `header:"x-ms-client-request-id"`
ContentMD5 bool
}
// AppendBlock appends a block to an append blob.
//
// See https://docs.microsoft.com/en-us/rest/api/storageservices/fileservices/Append-Block
func (b *Blob) AppendBlock(chunk []byte, options *AppendBlockOptions) error {
params := url.Values{"comp": {"appendblock"}}
headers := b.Container.bsc.client.getStandardHeaders()
headers["x-ms-blob-type"] = string(BlobTypeAppend)
headers["Content-Length"] = fmt.Sprintf("%v", len(chunk))
if options != nil {
params = addTimeout(params, options.Timeout)
headers = mergeHeaders(headers, headersFromStruct(*options))
if options.ContentMD5 {
md5sum := md5.Sum(chunk)
headers[headerContentMD5] = base64.StdEncoding.EncodeToString(md5sum[:])
}
}
uri := b.Container.bsc.client.getEndpoint(blobServiceName, b.buildPath(), params)
resp, err := b.Container.bsc.client.exec(http.MethodPut, uri, headers, bytes.NewReader(chunk), b.Container.bsc.auth)
if err != nil {
return err
}
return b.respondCreation(resp, BlobTypeAppend)
}