mirror of
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Among others, this updates minio-go, so that the new "eu-west-3" zone for AWS is supported.
989 lines
28 KiB
Go
989 lines
28 KiB
Go
// Package storage provides clients for Microsoft Azure Storage Services.
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package storage
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// Copyright 2017 Microsoft Corporation
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain 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,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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import (
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"bufio"
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"bytes"
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"encoding/base64"
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"encoding/json"
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"encoding/xml"
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"errors"
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"fmt"
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"io"
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"io/ioutil"
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"mime"
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"mime/multipart"
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"net/http"
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"net/url"
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"regexp"
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"runtime"
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"strconv"
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"strings"
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"time"
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"github.com/Azure/go-autorest/autorest"
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"github.com/Azure/go-autorest/autorest/azure"
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)
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const (
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// DefaultBaseURL is the domain name used for storage requests in the
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// public cloud when a default client is created.
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DefaultBaseURL = "core.windows.net"
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// DefaultAPIVersion is the Azure Storage API version string used when a
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// basic client is created.
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DefaultAPIVersion = "2016-05-31"
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defaultUseHTTPS = true
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defaultRetryAttempts = 5
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defaultRetryDuration = time.Second * 5
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// StorageEmulatorAccountName is the fixed storage account used by Azure Storage Emulator
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StorageEmulatorAccountName = "devstoreaccount1"
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// StorageEmulatorAccountKey is the the fixed storage account used by Azure Storage Emulator
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StorageEmulatorAccountKey = "Eby8vdM02xNOcqFlqUwJPLlmEtlCDXJ1OUzFT50uSRZ6IFsuFq2UVErCz4I6tq/K1SZFPTOtr/KBHBeksoGMGw=="
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blobServiceName = "blob"
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tableServiceName = "table"
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queueServiceName = "queue"
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fileServiceName = "file"
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storageEmulatorBlob = "127.0.0.1:10000"
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storageEmulatorTable = "127.0.0.1:10002"
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storageEmulatorQueue = "127.0.0.1:10001"
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userAgentHeader = "User-Agent"
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userDefinedMetadataHeaderPrefix = "x-ms-meta-"
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connectionStringAccountName = "accountname"
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connectionStringAccountKey = "accountkey"
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connectionStringEndpointSuffix = "endpointsuffix"
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connectionStringEndpointProtocol = "defaultendpointsprotocol"
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connectionStringBlobEndpoint = "blobendpoint"
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connectionStringFileEndpoint = "fileendpoint"
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connectionStringQueueEndpoint = "queueendpoint"
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connectionStringTableEndpoint = "tableendpoint"
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connectionStringSAS = "sharedaccesssignature"
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)
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var (
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validStorageAccount = regexp.MustCompile("^[0-9a-z]{3,24}$")
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defaultValidStatusCodes = []int{
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http.StatusRequestTimeout, // 408
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http.StatusInternalServerError, // 500
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http.StatusBadGateway, // 502
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http.StatusServiceUnavailable, // 503
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http.StatusGatewayTimeout, // 504
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}
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)
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// Sender sends a request
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type Sender interface {
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Send(*Client, *http.Request) (*http.Response, error)
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}
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// DefaultSender is the default sender for the client. It implements
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// an automatic retry strategy.
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type DefaultSender struct {
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RetryAttempts int
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RetryDuration time.Duration
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ValidStatusCodes []int
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attempts int // used for testing
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}
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// Send is the default retry strategy in the client
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func (ds *DefaultSender) Send(c *Client, req *http.Request) (resp *http.Response, err error) {
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rr := autorest.NewRetriableRequest(req)
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for attempts := 0; attempts < ds.RetryAttempts; attempts++ {
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err = rr.Prepare()
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if err != nil {
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return resp, err
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}
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resp, err = c.HTTPClient.Do(rr.Request())
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if err != nil || !autorest.ResponseHasStatusCode(resp, ds.ValidStatusCodes...) {
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return resp, err
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}
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autorest.DelayForBackoff(ds.RetryDuration, attempts, req.Cancel)
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ds.attempts = attempts
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}
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ds.attempts++
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return resp, err
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}
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// Client is the object that needs to be constructed to perform
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// operations on the storage account.
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type Client struct {
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// HTTPClient is the http.Client used to initiate API
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// requests. http.DefaultClient is used when creating a
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// client.
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HTTPClient *http.Client
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// Sender is an interface that sends the request. Clients are
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// created with a DefaultSender. The DefaultSender has an
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// automatic retry strategy built in. The Sender can be customized.
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Sender Sender
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accountName string
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accountKey []byte
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useHTTPS bool
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UseSharedKeyLite bool
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baseURL string
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apiVersion string
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userAgent string
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sasClient bool
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accountSASToken url.Values
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}
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type storageResponse struct {
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statusCode int
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headers http.Header
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body io.ReadCloser
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}
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type odataResponse struct {
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storageResponse
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odata odataErrorWrapper
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}
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// AzureStorageServiceError contains fields of the error response from
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// Azure Storage Service REST API. See https://msdn.microsoft.com/en-us/library/azure/dd179382.aspx
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// Some fields might be specific to certain calls.
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type AzureStorageServiceError struct {
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Code string `xml:"Code"`
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Message string `xml:"Message"`
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AuthenticationErrorDetail string `xml:"AuthenticationErrorDetail"`
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QueryParameterName string `xml:"QueryParameterName"`
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QueryParameterValue string `xml:"QueryParameterValue"`
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Reason string `xml:"Reason"`
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Lang string
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StatusCode int
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RequestID string
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Date string
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APIVersion string
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}
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type odataErrorMessage struct {
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Lang string `json:"lang"`
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Value string `json:"value"`
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}
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type odataError struct {
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Code string `json:"code"`
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Message odataErrorMessage `json:"message"`
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}
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type odataErrorWrapper struct {
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Err odataError `json:"odata.error"`
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}
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// UnexpectedStatusCodeError is returned when a storage service responds with neither an error
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// nor with an HTTP status code indicating success.
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type UnexpectedStatusCodeError struct {
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allowed []int
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got int
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}
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func (e UnexpectedStatusCodeError) Error() string {
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s := func(i int) string { return fmt.Sprintf("%d %s", i, http.StatusText(i)) }
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got := s(e.got)
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expected := []string{}
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for _, v := range e.allowed {
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expected = append(expected, s(v))
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}
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return fmt.Sprintf("storage: status code from service response is %s; was expecting %s", got, strings.Join(expected, " or "))
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}
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// Got is the actual status code returned by Azure.
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func (e UnexpectedStatusCodeError) Got() int {
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return e.got
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}
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// NewClientFromConnectionString creates a Client from the connection string.
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func NewClientFromConnectionString(input string) (Client, error) {
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// build a map of connection string key/value pairs
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parts := map[string]string{}
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for _, pair := range strings.Split(input, ";") {
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if pair == "" {
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continue
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}
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equalDex := strings.IndexByte(pair, '=')
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if equalDex <= 0 {
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return Client{}, fmt.Errorf("Invalid connection segment %q", pair)
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}
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value := strings.TrimSpace(pair[equalDex+1:])
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key := strings.TrimSpace(strings.ToLower(pair[:equalDex]))
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parts[key] = value
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}
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// TODO: validate parameter sets?
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if parts[connectionStringAccountName] == StorageEmulatorAccountName {
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return NewEmulatorClient()
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}
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if parts[connectionStringSAS] != "" {
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endpoint := ""
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if parts[connectionStringBlobEndpoint] != "" {
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endpoint = parts[connectionStringBlobEndpoint]
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} else if parts[connectionStringFileEndpoint] != "" {
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endpoint = parts[connectionStringFileEndpoint]
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} else if parts[connectionStringQueueEndpoint] != "" {
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endpoint = parts[connectionStringQueueEndpoint]
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} else {
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endpoint = parts[connectionStringTableEndpoint]
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}
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return NewAccountSASClientFromEndpointToken(endpoint, parts[connectionStringSAS])
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}
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useHTTPS := defaultUseHTTPS
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if parts[connectionStringEndpointProtocol] != "" {
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useHTTPS = parts[connectionStringEndpointProtocol] == "https"
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}
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return NewClient(parts[connectionStringAccountName], parts[connectionStringAccountKey],
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parts[connectionStringEndpointSuffix], DefaultAPIVersion, useHTTPS)
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}
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// NewBasicClient constructs a Client with given storage service name and
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// key.
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func NewBasicClient(accountName, accountKey string) (Client, error) {
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if accountName == StorageEmulatorAccountName {
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return NewEmulatorClient()
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}
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return NewClient(accountName, accountKey, DefaultBaseURL, DefaultAPIVersion, defaultUseHTTPS)
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}
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// NewBasicClientOnSovereignCloud constructs a Client with given storage service name and
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// key in the referenced cloud.
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func NewBasicClientOnSovereignCloud(accountName, accountKey string, env azure.Environment) (Client, error) {
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if accountName == StorageEmulatorAccountName {
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return NewEmulatorClient()
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}
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return NewClient(accountName, accountKey, env.StorageEndpointSuffix, DefaultAPIVersion, defaultUseHTTPS)
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}
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//NewEmulatorClient contructs a Client intended to only work with Azure
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//Storage Emulator
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func NewEmulatorClient() (Client, error) {
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return NewClient(StorageEmulatorAccountName, StorageEmulatorAccountKey, DefaultBaseURL, DefaultAPIVersion, false)
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}
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// NewClient constructs a Client. This should be used if the caller wants
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// to specify whether to use HTTPS, a specific REST API version or a custom
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// storage endpoint than Azure Public Cloud.
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func NewClient(accountName, accountKey, serviceBaseURL, apiVersion string, useHTTPS bool) (Client, error) {
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var c Client
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if !IsValidStorageAccount(accountName) {
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return c, fmt.Errorf("azure: account name is not valid: it must be between 3 and 24 characters, and only may contain numbers and lowercase letters: %v", accountName)
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} else if accountKey == "" {
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return c, fmt.Errorf("azure: account key required")
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} else if serviceBaseURL == "" {
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return c, fmt.Errorf("azure: base storage service url required")
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}
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key, err := base64.StdEncoding.DecodeString(accountKey)
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if err != nil {
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return c, fmt.Errorf("azure: malformed storage account key: %v", err)
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}
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c = Client{
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HTTPClient: http.DefaultClient,
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accountName: accountName,
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accountKey: key,
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useHTTPS: useHTTPS,
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baseURL: serviceBaseURL,
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apiVersion: apiVersion,
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sasClient: false,
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UseSharedKeyLite: false,
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Sender: &DefaultSender{
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RetryAttempts: defaultRetryAttempts,
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ValidStatusCodes: defaultValidStatusCodes,
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RetryDuration: defaultRetryDuration,
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},
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}
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c.userAgent = c.getDefaultUserAgent()
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return c, nil
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}
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// IsValidStorageAccount checks if the storage account name is valid.
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// See https://docs.microsoft.com/en-us/azure/storage/storage-create-storage-account
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func IsValidStorageAccount(account string) bool {
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return validStorageAccount.MatchString(account)
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}
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// NewAccountSASClient contructs a client that uses accountSAS authorization
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// for its operations.
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func NewAccountSASClient(account string, token url.Values, env azure.Environment) Client {
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c := newSASClient()
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c.accountSASToken = token
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c.accountName = account
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c.baseURL = env.StorageEndpointSuffix
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// Get API version and protocol from token
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c.apiVersion = token.Get("sv")
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c.useHTTPS = token.Get("spr") == "https"
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return c
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}
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// NewAccountSASClientFromEndpointToken constructs a client that uses accountSAS authorization
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// for its operations using the specified endpoint and SAS token.
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func NewAccountSASClientFromEndpointToken(endpoint string, sasToken string) (Client, error) {
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u, err := url.Parse(endpoint)
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if err != nil {
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return Client{}, err
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}
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token, err := url.ParseQuery(sasToken)
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if err != nil {
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return Client{}, err
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}
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// the host name will look something like this
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// - foo.blob.core.windows.net
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// "foo" is the account name
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// "core.windows.net" is the baseURL
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// find the first dot to get account name
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i1 := strings.IndexByte(u.Host, '.')
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if i1 < 0 {
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return Client{}, fmt.Errorf("failed to find '.' in %s", u.Host)
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}
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// now find the second dot to get the base URL
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i2 := strings.IndexByte(u.Host[i1+1:], '.')
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if i2 < 0 {
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return Client{}, fmt.Errorf("failed to find '.' in %s", u.Host[i1+1:])
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}
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c := newSASClient()
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c.accountSASToken = token
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c.accountName = u.Host[:i1]
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c.baseURL = u.Host[i1+i2+2:]
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// Get API version and protocol from token
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c.apiVersion = token.Get("sv")
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c.useHTTPS = token.Get("spr") == "https"
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return c, nil
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}
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func newSASClient() Client {
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c := Client{
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HTTPClient: http.DefaultClient,
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apiVersion: DefaultAPIVersion,
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sasClient: true,
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Sender: &DefaultSender{
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RetryAttempts: defaultRetryAttempts,
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ValidStatusCodes: defaultValidStatusCodes,
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RetryDuration: defaultRetryDuration,
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},
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}
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c.userAgent = c.getDefaultUserAgent()
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return c
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}
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func (c Client) isServiceSASClient() bool {
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return c.sasClient && c.accountSASToken == nil
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}
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func (c Client) isAccountSASClient() bool {
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return c.sasClient && c.accountSASToken != nil
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}
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func (c Client) getDefaultUserAgent() string {
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return fmt.Sprintf("Go/%s (%s-%s) azure-storage-go/%s api-version/%s",
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runtime.Version(),
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runtime.GOARCH,
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runtime.GOOS,
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sdkVersion,
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c.apiVersion,
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)
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}
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// AddToUserAgent adds an extension to the current user agent
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func (c *Client) AddToUserAgent(extension string) error {
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if extension != "" {
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c.userAgent = fmt.Sprintf("%s %s", c.userAgent, extension)
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return nil
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}
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return fmt.Errorf("Extension was empty, User Agent stayed as %s", c.userAgent)
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}
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// protectUserAgent is used in funcs that include extraheaders as a parameter.
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// It prevents the User-Agent header to be overwritten, instead if it happens to
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// be present, it gets added to the current User-Agent. Use it before getStandardHeaders
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func (c *Client) protectUserAgent(extraheaders map[string]string) map[string]string {
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if v, ok := extraheaders[userAgentHeader]; ok {
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c.AddToUserAgent(v)
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delete(extraheaders, userAgentHeader)
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}
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return extraheaders
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}
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func (c Client) getBaseURL(service string) *url.URL {
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scheme := "http"
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if c.useHTTPS {
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scheme = "https"
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}
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host := ""
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if c.accountName == StorageEmulatorAccountName {
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switch service {
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case blobServiceName:
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host = storageEmulatorBlob
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case tableServiceName:
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host = storageEmulatorTable
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case queueServiceName:
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host = storageEmulatorQueue
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}
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} else {
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host = fmt.Sprintf("%s.%s.%s", c.accountName, service, c.baseURL)
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}
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return &url.URL{
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Scheme: scheme,
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Host: host,
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}
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}
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func (c Client) getEndpoint(service, path string, params url.Values) string {
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u := c.getBaseURL(service)
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// API doesn't accept path segments not starting with '/'
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if !strings.HasPrefix(path, "/") {
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path = fmt.Sprintf("/%v", path)
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}
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if c.accountName == StorageEmulatorAccountName {
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path = fmt.Sprintf("/%v%v", StorageEmulatorAccountName, path)
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}
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u.Path = path
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u.RawQuery = params.Encode()
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return u.String()
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}
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// AccountSASTokenOptions includes options for constructing
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// an account SAS token.
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// https://docs.microsoft.com/en-us/rest/api/storageservices/constructing-an-account-sas
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type AccountSASTokenOptions struct {
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APIVersion string
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Services Services
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ResourceTypes ResourceTypes
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Permissions Permissions
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Start time.Time
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Expiry time.Time
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IP string
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UseHTTPS bool
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}
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// Services specify services accessible with an account SAS.
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type Services struct {
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Blob bool
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Queue bool
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Table bool
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File bool
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}
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// ResourceTypes specify the resources accesible with an
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// account SAS.
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type ResourceTypes struct {
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Service bool
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Container bool
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Object bool
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}
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// Permissions specifies permissions for an accountSAS.
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type Permissions struct {
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Read bool
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Write bool
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Delete bool
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List bool
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Add bool
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Create bool
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Update bool
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Process bool
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}
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// GetAccountSASToken creates an account SAS token
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// See https://docs.microsoft.com/en-us/rest/api/storageservices/constructing-an-account-sas
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func (c Client) GetAccountSASToken(options AccountSASTokenOptions) (url.Values, error) {
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if options.APIVersion == "" {
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options.APIVersion = c.apiVersion
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}
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if options.APIVersion < "2015-04-05" {
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return url.Values{}, fmt.Errorf("account SAS does not support API versions prior to 2015-04-05. API version : %s", options.APIVersion)
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}
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// build services string
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services := ""
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if options.Services.Blob {
|
|
services += "b"
|
|
}
|
|
if options.Services.Queue {
|
|
services += "q"
|
|
}
|
|
if options.Services.Table {
|
|
services += "t"
|
|
}
|
|
if options.Services.File {
|
|
services += "f"
|
|
}
|
|
|
|
// build resources string
|
|
resources := ""
|
|
if options.ResourceTypes.Service {
|
|
resources += "s"
|
|
}
|
|
if options.ResourceTypes.Container {
|
|
resources += "c"
|
|
}
|
|
if options.ResourceTypes.Object {
|
|
resources += "o"
|
|
}
|
|
|
|
// build permissions string
|
|
permissions := ""
|
|
if options.Permissions.Read {
|
|
permissions += "r"
|
|
}
|
|
if options.Permissions.Write {
|
|
permissions += "w"
|
|
}
|
|
if options.Permissions.Delete {
|
|
permissions += "d"
|
|
}
|
|
if options.Permissions.List {
|
|
permissions += "l"
|
|
}
|
|
if options.Permissions.Add {
|
|
permissions += "a"
|
|
}
|
|
if options.Permissions.Create {
|
|
permissions += "c"
|
|
}
|
|
if options.Permissions.Update {
|
|
permissions += "u"
|
|
}
|
|
if options.Permissions.Process {
|
|
permissions += "p"
|
|
}
|
|
|
|
// build start time, if exists
|
|
start := ""
|
|
if options.Start != (time.Time{}) {
|
|
start = options.Start.Format(time.RFC3339)
|
|
// For some reason I don't understand, it fails when the rest of the string is included
|
|
start = start[:10]
|
|
}
|
|
|
|
// build expiry time
|
|
expiry := options.Expiry.Format(time.RFC3339)
|
|
// For some reason I don't understand, it fails when the rest of the string is included
|
|
expiry = expiry[:10]
|
|
|
|
protocol := "https,http"
|
|
if options.UseHTTPS {
|
|
protocol = "https"
|
|
}
|
|
|
|
stringToSign := strings.Join([]string{
|
|
c.accountName,
|
|
permissions,
|
|
services,
|
|
resources,
|
|
start,
|
|
expiry,
|
|
options.IP,
|
|
protocol,
|
|
options.APIVersion,
|
|
"",
|
|
}, "\n")
|
|
signature := c.computeHmac256(stringToSign)
|
|
|
|
sasParams := url.Values{
|
|
"sv": {options.APIVersion},
|
|
"ss": {services},
|
|
"srt": {resources},
|
|
"sp": {permissions},
|
|
"se": {expiry},
|
|
"spr": {protocol},
|
|
"sig": {signature},
|
|
}
|
|
if start != "" {
|
|
sasParams.Add("st", start)
|
|
}
|
|
if options.IP != "" {
|
|
sasParams.Add("sip", options.IP)
|
|
}
|
|
|
|
return sasParams, nil
|
|
}
|
|
|
|
// GetBlobService returns a BlobStorageClient which can operate on the blob
|
|
// service of the storage account.
|
|
func (c Client) GetBlobService() BlobStorageClient {
|
|
b := BlobStorageClient{
|
|
client: c,
|
|
}
|
|
b.client.AddToUserAgent(blobServiceName)
|
|
b.auth = sharedKey
|
|
if c.UseSharedKeyLite {
|
|
b.auth = sharedKeyLite
|
|
}
|
|
return b
|
|
}
|
|
|
|
// GetQueueService returns a QueueServiceClient which can operate on the queue
|
|
// service of the storage account.
|
|
func (c Client) GetQueueService() QueueServiceClient {
|
|
q := QueueServiceClient{
|
|
client: c,
|
|
}
|
|
q.client.AddToUserAgent(queueServiceName)
|
|
q.auth = sharedKey
|
|
if c.UseSharedKeyLite {
|
|
q.auth = sharedKeyLite
|
|
}
|
|
return q
|
|
}
|
|
|
|
// GetTableService returns a TableServiceClient which can operate on the table
|
|
// service of the storage account.
|
|
func (c Client) GetTableService() TableServiceClient {
|
|
t := TableServiceClient{
|
|
client: c,
|
|
}
|
|
t.client.AddToUserAgent(tableServiceName)
|
|
t.auth = sharedKeyForTable
|
|
if c.UseSharedKeyLite {
|
|
t.auth = sharedKeyLiteForTable
|
|
}
|
|
return t
|
|
}
|
|
|
|
// GetFileService returns a FileServiceClient which can operate on the file
|
|
// service of the storage account.
|
|
func (c Client) GetFileService() FileServiceClient {
|
|
f := FileServiceClient{
|
|
client: c,
|
|
}
|
|
f.client.AddToUserAgent(fileServiceName)
|
|
f.auth = sharedKey
|
|
if c.UseSharedKeyLite {
|
|
f.auth = sharedKeyLite
|
|
}
|
|
return f
|
|
}
|
|
|
|
func (c Client) getStandardHeaders() map[string]string {
|
|
return map[string]string{
|
|
userAgentHeader: c.userAgent,
|
|
"x-ms-version": c.apiVersion,
|
|
"x-ms-date": currentTimeRfc1123Formatted(),
|
|
}
|
|
}
|
|
|
|
func (c Client) exec(verb, url string, headers map[string]string, body io.Reader, auth authentication) (*storageResponse, error) {
|
|
headers, err := c.addAuthorizationHeader(verb, url, headers, auth)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
req, err := http.NewRequest(verb, url, body)
|
|
if err != nil {
|
|
return nil, errors.New("azure/storage: error creating request: " + err.Error())
|
|
}
|
|
|
|
// http.NewRequest() will automatically set req.ContentLength for a handful of types
|
|
// otherwise we will handle here.
|
|
if req.ContentLength < 1 {
|
|
if clstr, ok := headers["Content-Length"]; ok {
|
|
if cl, err := strconv.ParseInt(clstr, 10, 64); err == nil {
|
|
req.ContentLength = cl
|
|
}
|
|
}
|
|
}
|
|
|
|
for k, v := range headers {
|
|
req.Header[k] = append(req.Header[k], v) // Must bypass case munging present in `Add` by using map functions directly. See https://github.com/Azure/azure-sdk-for-go/issues/645
|
|
}
|
|
|
|
if c.isAccountSASClient() {
|
|
// append the SAS token to the query params
|
|
v := req.URL.Query()
|
|
v = mergeParams(v, c.accountSASToken)
|
|
req.URL.RawQuery = v.Encode()
|
|
}
|
|
|
|
resp, err := c.Sender.Send(&c, req)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
if resp.StatusCode >= 400 && resp.StatusCode <= 505 {
|
|
var respBody []byte
|
|
respBody, err = readAndCloseBody(resp.Body)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
requestID, date, version := getDebugHeaders(resp.Header)
|
|
if len(respBody) == 0 {
|
|
// no error in response body, might happen in HEAD requests
|
|
err = serviceErrFromStatusCode(resp.StatusCode, resp.Status, requestID, date, version)
|
|
} else {
|
|
storageErr := AzureStorageServiceError{
|
|
StatusCode: resp.StatusCode,
|
|
RequestID: requestID,
|
|
Date: date,
|
|
APIVersion: version,
|
|
}
|
|
// response contains storage service error object, unmarshal
|
|
if resp.Header.Get("Content-Type") == "application/xml" {
|
|
errIn := serviceErrFromXML(respBody, &storageErr)
|
|
if err != nil { // error unmarshaling the error response
|
|
err = errIn
|
|
}
|
|
} else {
|
|
errIn := serviceErrFromJSON(respBody, &storageErr)
|
|
if err != nil { // error unmarshaling the error response
|
|
err = errIn
|
|
}
|
|
}
|
|
err = storageErr
|
|
}
|
|
return &storageResponse{
|
|
statusCode: resp.StatusCode,
|
|
headers: resp.Header,
|
|
body: ioutil.NopCloser(bytes.NewReader(respBody)), /* restore the body */
|
|
}, err
|
|
}
|
|
|
|
return &storageResponse{
|
|
statusCode: resp.StatusCode,
|
|
headers: resp.Header,
|
|
body: resp.Body}, nil
|
|
}
|
|
|
|
func (c Client) execInternalJSONCommon(verb, url string, headers map[string]string, body io.Reader, auth authentication) (*odataResponse, *http.Request, *http.Response, error) {
|
|
headers, err := c.addAuthorizationHeader(verb, url, headers, auth)
|
|
if err != nil {
|
|
return nil, nil, nil, err
|
|
}
|
|
|
|
req, err := http.NewRequest(verb, url, body)
|
|
for k, v := range headers {
|
|
req.Header.Add(k, v)
|
|
}
|
|
|
|
resp, err := c.Sender.Send(&c, req)
|
|
if err != nil {
|
|
return nil, nil, nil, err
|
|
}
|
|
|
|
respToRet := &odataResponse{}
|
|
respToRet.body = resp.Body
|
|
respToRet.statusCode = resp.StatusCode
|
|
respToRet.headers = resp.Header
|
|
|
|
statusCode := resp.StatusCode
|
|
if statusCode >= 400 && statusCode <= 505 {
|
|
var respBody []byte
|
|
respBody, err = readAndCloseBody(resp.Body)
|
|
if err != nil {
|
|
return nil, nil, nil, err
|
|
}
|
|
|
|
requestID, date, version := getDebugHeaders(resp.Header)
|
|
if len(respBody) == 0 {
|
|
// no error in response body, might happen in HEAD requests
|
|
err = serviceErrFromStatusCode(resp.StatusCode, resp.Status, requestID, date, version)
|
|
return respToRet, req, resp, err
|
|
}
|
|
// try unmarshal as odata.error json
|
|
err = json.Unmarshal(respBody, &respToRet.odata)
|
|
}
|
|
|
|
return respToRet, req, resp, err
|
|
}
|
|
|
|
func (c Client) execInternalJSON(verb, url string, headers map[string]string, body io.Reader, auth authentication) (*odataResponse, error) {
|
|
respToRet, _, _, err := c.execInternalJSONCommon(verb, url, headers, body, auth)
|
|
return respToRet, err
|
|
}
|
|
|
|
func (c Client) execBatchOperationJSON(verb, url string, headers map[string]string, body io.Reader, auth authentication) (*odataResponse, error) {
|
|
// execute common query, get back generated request, response etc... for more processing.
|
|
respToRet, req, resp, err := c.execInternalJSONCommon(verb, url, headers, body, auth)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
// return the OData in the case of executing batch commands.
|
|
// In this case we need to read the outer batch boundary and contents.
|
|
// Then we read the changeset information within the batch
|
|
var respBody []byte
|
|
respBody, err = readAndCloseBody(resp.Body)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
// outer multipart body
|
|
_, batchHeader, err := mime.ParseMediaType(resp.Header["Content-Type"][0])
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
// batch details.
|
|
batchBoundary := batchHeader["boundary"]
|
|
batchPartBuf, changesetBoundary, err := genBatchReader(batchBoundary, respBody)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
// changeset details.
|
|
err = genChangesetReader(req, respToRet, batchPartBuf, changesetBoundary)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
return respToRet, nil
|
|
}
|
|
|
|
func genChangesetReader(req *http.Request, respToRet *odataResponse, batchPartBuf io.Reader, changesetBoundary string) error {
|
|
changesetMultiReader := multipart.NewReader(batchPartBuf, changesetBoundary)
|
|
changesetPart, err := changesetMultiReader.NextPart()
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
changesetPartBufioReader := bufio.NewReader(changesetPart)
|
|
changesetResp, err := http.ReadResponse(changesetPartBufioReader, req)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
if changesetResp.StatusCode != http.StatusNoContent {
|
|
changesetBody, err := readAndCloseBody(changesetResp.Body)
|
|
err = json.Unmarshal(changesetBody, &respToRet.odata)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
respToRet.statusCode = changesetResp.StatusCode
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
func genBatchReader(batchBoundary string, respBody []byte) (io.Reader, string, error) {
|
|
respBodyString := string(respBody)
|
|
respBodyReader := strings.NewReader(respBodyString)
|
|
|
|
// reading batchresponse
|
|
batchMultiReader := multipart.NewReader(respBodyReader, batchBoundary)
|
|
batchPart, err := batchMultiReader.NextPart()
|
|
if err != nil {
|
|
return nil, "", err
|
|
}
|
|
batchPartBufioReader := bufio.NewReader(batchPart)
|
|
|
|
_, changesetHeader, err := mime.ParseMediaType(batchPart.Header.Get("Content-Type"))
|
|
if err != nil {
|
|
return nil, "", err
|
|
}
|
|
changesetBoundary := changesetHeader["boundary"]
|
|
return batchPartBufioReader, changesetBoundary, nil
|
|
}
|
|
|
|
func readAndCloseBody(body io.ReadCloser) ([]byte, error) {
|
|
defer body.Close()
|
|
out, err := ioutil.ReadAll(body)
|
|
if err == io.EOF {
|
|
err = nil
|
|
}
|
|
return out, err
|
|
}
|
|
|
|
func serviceErrFromXML(body []byte, storageErr *AzureStorageServiceError) error {
|
|
if err := xml.Unmarshal(body, storageErr); err != nil {
|
|
storageErr.Message = fmt.Sprintf("Response body could no be unmarshaled: %v. Body: %v.", err, string(body))
|
|
return err
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func serviceErrFromJSON(body []byte, storageErr *AzureStorageServiceError) error {
|
|
odataError := odataErrorWrapper{}
|
|
if err := json.Unmarshal(body, &odataError); err != nil {
|
|
storageErr.Message = fmt.Sprintf("Response body could no be unmarshaled: %v. Body: %v.", err, string(body))
|
|
return err
|
|
}
|
|
storageErr.Code = odataError.Err.Code
|
|
storageErr.Message = odataError.Err.Message.Value
|
|
storageErr.Lang = odataError.Err.Message.Lang
|
|
return nil
|
|
}
|
|
|
|
func serviceErrFromStatusCode(code int, status string, requestID, date, version string) AzureStorageServiceError {
|
|
return AzureStorageServiceError{
|
|
StatusCode: code,
|
|
Code: status,
|
|
RequestID: requestID,
|
|
Date: date,
|
|
APIVersion: version,
|
|
Message: "no response body was available for error status code",
|
|
}
|
|
}
|
|
|
|
func (e AzureStorageServiceError) Error() string {
|
|
return fmt.Sprintf("storage: service returned error: StatusCode=%d, ErrorCode=%s, ErrorMessage=%s, RequestInitiated=%s, RequestId=%s, API Version=%s, QueryParameterName=%s, QueryParameterValue=%s",
|
|
e.StatusCode, e.Code, e.Message, e.Date, e.RequestID, e.APIVersion, e.QueryParameterName, e.QueryParameterValue)
|
|
}
|
|
|
|
// checkRespCode returns UnexpectedStatusError if the given response code is not
|
|
// one of the allowed status codes; otherwise nil.
|
|
func checkRespCode(respCode int, allowed []int) error {
|
|
for _, v := range allowed {
|
|
if respCode == v {
|
|
return nil
|
|
}
|
|
}
|
|
return UnexpectedStatusCodeError{allowed, respCode}
|
|
}
|
|
|
|
func (c Client) addMetadataToHeaders(h map[string]string, metadata map[string]string) map[string]string {
|
|
metadata = c.protectUserAgent(metadata)
|
|
for k, v := range metadata {
|
|
h[userDefinedMetadataHeaderPrefix+k] = v
|
|
}
|
|
return h
|
|
}
|
|
|
|
func getDebugHeaders(h http.Header) (requestID, date, version string) {
|
|
requestID = h.Get("x-ms-request-id")
|
|
version = h.Get("x-ms-version")
|
|
date = h.Get("Date")
|
|
return
|
|
}
|