Update vendored azure-sdk-for-go

Updating to a recent version of Azure Storage SDK to be able to patch some memory leaks through configurable HTTP client changes which were made possible by recent patches to it. Signed-off-by: Ahmet Alp Balkan <ahmetalpbalkan@gmail.com>
2016-10-28 15:46:05 -07:00 · 2016-10-28 15:46:05 -07:00 · 2ab25288a2
commit 2ab25288a2
parent 62e88f0fe7
10 changed files with 1241 additions and 40 deletions
--- a/Godeps/Godeps.json
+++ b/Godeps/Godeps.json
@ -8,8 +8,8 @@
 	"Deps": [
 		{
 			"ImportPath": "github.com/Azure/azure-sdk-for-go/storage",
-			"Comment": "v1.2-334-g95361a2",
-			"Rev": "95361a2573b1fa92a00c5fc2707a80308483c6f9"
+			"Comment": "v5.0.0-beta-6-g0b5fe2a",
+			"Rev": "0b5fe2abe0271ba07049eacaa65922d67c319543"
 		},
 		{
 			"ImportPath": "github.com/Sirupsen/logrus",
--- a/registry/storage/driver/azure/azure.go
+++ b/registry/storage/driver/azure/azure.go
@ -116,7 +116,7 @@ func (d *driver) GetContent(ctx context.Context, path string) ([]byte, error) {

 // PutContent stores the []byte content at a location designated by "path".
 func (d *driver) PutContent(ctx context.Context, path string, contents []byte) error {
-	if _, err := d.client.DeleteBlobIfExists(d.container, path); err != nil {
+	if _, err := d.client.DeleteBlobIfExists(d.container, path, nil); err != nil {
 		return err
 	}
 	writer, err := d.Writer(ctx, path, false)
@ -151,7 +151,7 @@ func (d *driver) Reader(ctx context.Context, path string, offset int64) (io.Read
 	}

 	bytesRange := fmt.Sprintf("%v-", offset)
-	resp, err := d.client.GetBlobRange(d.container, path, bytesRange)
+	resp, err := d.client.GetBlobRange(d.container, path, bytesRange, nil)
 	if err != nil {
 		return nil, err
 	}
@ -174,7 +174,7 @@ func (d *driver) Writer(ctx context.Context, path string, append bool) (storaged
 			}
 			size = blobProperties.ContentLength
 		} else {
-			err := d.client.DeleteBlob(d.container, path)
+			err := d.client.DeleteBlob(d.container, path, nil)
 			if err != nil {
 				return nil, err
 			}
@ -272,12 +272,12 @@ func (d *driver) Move(ctx context.Context, sourcePath string, destPath string) e
 		return err
 	}

-	return d.client.DeleteBlob(d.container, sourcePath)
+	return d.client.DeleteBlob(d.container, sourcePath, nil)
 }

 // Delete recursively deletes all objects stored at "path" and its subpaths.
 func (d *driver) Delete(ctx context.Context, path string) error {
-	ok, err := d.client.DeleteBlobIfExists(d.container, path)
+	ok, err := d.client.DeleteBlobIfExists(d.container, path, nil)
 	if err != nil {
 		return err
 	}
@ -292,7 +292,7 @@ func (d *driver) Delete(ctx context.Context, path string) error {
 	}

 	for _, b := range blobs {
-		if err = d.client.DeleteBlob(d.container, b); err != nil {
+		if err = d.client.DeleteBlob(d.container, b, nil); err != nil {
 			return err
 		}
 	}
@ -442,7 +442,7 @@ func (w *writer) Cancel() error {
 		return fmt.Errorf("already committed")
 	}
 	w.cancelled = true
-	return w.driver.client.DeleteBlob(w.driver.container, w.path)
+	return w.driver.client.DeleteBlob(w.driver.container, w.path, nil)
 }

 func (w *writer) Commit() error {
@ -470,7 +470,7 @@ func (bw *blockWriter) Write(p []byte) (int, error) {
 		if offset+chunkSize > len(p) {
 			chunkSize = len(p) - offset
 		}
-		err := bw.client.AppendBlock(bw.container, bw.path, p[offset:offset+chunkSize])
+		err := bw.client.AppendBlock(bw.container, bw.path, p[offset:offset+chunkSize], nil)
 		if err != nil {
 			return n, err
 		}
--- a/vendor/github.com/Azure/azure-sdk-for-go/LICENSE
+++ b/vendor/github.com/Azure/azure-sdk-for-go/LICENSE
@ -187,7 +187,7 @@
      same "printed page" as the copyright notice for easier
      identification within third-party archives.

-   Copyright [yyyy] [name of copyright owner]
+   Copyright 2016 Microsoft Corporation

   Licensed under the Apache License, Version 2.0 (the "License");
   you may not use this file except in compliance with the License.
--- a/vendor/github.com/Azure/azure-sdk-for-go/storage/README.md
+++ b/vendor/github.com/Azure/azure-sdk-for-go/storage/README.md
@ -0,0 +1,5 @@
+# Azure Storage SDK for Go
+
+The `github.com/Azure/azure-sdk-for-go/storage` package is used to perform operations in Azure Storage Service. To manage your storage accounts (Azure Resource Manager / ARM), use the [github.com/Azure/azure-sdk-for-go/arm/storage](../arm/storage) package. For your classic storage accounts (Azure Service Management / ASM), use [github.com/Azure/azure-sdk-for-go/management/storageservice](../management/storageservice) package.
+
+This package includes support for [Azure Storage Emulator](https://azure.microsoft.com/documentation/articles/storage-use-emulator/)
--- a/vendor/github.com/Azure/azure-sdk-for-go/storage/blob.go
+++ b/vendor/github.com/Azure/azure-sdk-for-go/storage/blob.go
@ -55,7 +55,51 @@ type ContainerListResponse struct {
 type Blob struct {
 	Name       string         `xml:"Name"`
 	Properties BlobProperties `xml:"Properties"`
-	// TODO (ahmetalpbalkan) Metadata
+	Metadata   BlobMetadata   `xml:"Metadata"`
+}
+
+// BlobMetadata is a set of custom name/value pairs.
+//
+// See https://msdn.microsoft.com/en-us/library/azure/dd179404.aspx
+type BlobMetadata map[string]string
+
+type blobMetadataEntries struct {
+	Entries []blobMetadataEntry `xml:",any"`
+}
+type blobMetadataEntry struct {
+	XMLName xml.Name
+	Value   string `xml:",chardata"`
+}
+
+// UnmarshalXML converts the xml:Metadata into Metadata map
+func (bm *BlobMetadata) UnmarshalXML(d *xml.Decoder, start xml.StartElement) error {
+	var entries blobMetadataEntries
+	if err := d.DecodeElement(&entries, &start); err != nil {
+		return err
+	}
+	for _, entry := range entries.Entries {
+		if *bm == nil {
+			*bm = make(BlobMetadata)
+		}
+		(*bm)[strings.ToLower(entry.XMLName.Local)] = entry.Value
+	}
+	return nil
+}
+
+// MarshalXML implements the xml.Marshaler interface. It encodes
+// metadata name/value pairs as they would appear in an Azure
+// ListBlobs response.
+func (bm BlobMetadata) MarshalXML(enc *xml.Encoder, start xml.StartElement) error {
+	entries := make([]blobMetadataEntry, 0, len(bm))
+	for k, v := range bm {
+		entries = append(entries, blobMetadataEntry{
+			XMLName: xml.Name{Local: http.CanonicalHeaderKey(k)},
+			Value:   v,
+		})
+	}
+	return enc.EncodeElement(blobMetadataEntries{
+		Entries: entries,
+	}, start)
 }

 // BlobProperties contains various properties of a blob
@ -67,6 +111,8 @@ type BlobProperties struct {
 	ContentLength         int64    `xml:"Content-Length"`
 	ContentType           string   `xml:"Content-Type"`
 	ContentEncoding       string   `xml:"Content-Encoding"`
+	CacheControl          string   `xml:"Cache-Control"`
+	ContentLanguage       string   `xml:"Cache-Language"`
 	BlobType              BlobType `xml:"x-ms-blob-blob-type"`
 	SequenceNumber        int64    `xml:"x-ms-blob-sequence-number"`
 	CopyID                string   `xml:"CopyId"`
@ -75,6 +121,17 @@ type BlobProperties struct {
 	CopyProgress          string   `xml:"CopyProgress"`
 	CopyCompletionTime    string   `xml:"CopyCompletionTime"`
 	CopyStatusDescription string   `xml:"CopyStatusDescription"`
+	LeaseStatus           string   `xml:"LeaseStatus"`
+}
+
+// BlobHeaders contains various properties of a blob and is an entry
+// in SetBlobProperties
+type BlobHeaders struct {
+	ContentMD5      string `header:"x-ms-blob-content-md5"`
+	ContentLanguage string `header:"x-ms-blob-content-language"`
+	ContentEncoding string `header:"x-ms-blob-content-encoding"`
+	ContentType     string `header:"x-ms-blob-content-type"`
+	CacheControl    string `header:"x-ms-blob-cache-control"`
 }

 // BlobListResponse contains the response fields from ListBlobs call.
@ -88,6 +145,16 @@ type BlobListResponse struct {
 	NextMarker string   `xml:"NextMarker"`
 	MaxResults int64    `xml:"MaxResults"`
 	Blobs      []Blob   `xml:"Blobs>Blob"`
+
+	// BlobPrefix is used to traverse blobs as if it were a file system.
+	// It is returned if ListBlobsParameters.Delimiter is specified.
+	// The list here can be thought of as "folders" that may contain
+	// other folders or blobs.
+	BlobPrefixes []string `xml:"Blobs>BlobPrefix>Name"`
+
+	// Delimiter is used to traverse blobs as if it were a file system.
+	// It is returned if ListBlobsParameters.Delimiter is specified.
+	Delimiter string `xml:"Delimiter"`
 }

 // ListContainersParameters defines the set of customizable parameters to make a
@ -189,6 +256,23 @@ const (
 	blobCopyStatusFailed  = "failed"
 )

+// lease constants.
+const (
+	leaseHeaderPrefix = "x-ms-lease-"
+	leaseID           = "x-ms-lease-id"
+	leaseAction       = "x-ms-lease-action"
+	leaseBreakPeriod  = "x-ms-lease-break-period"
+	leaseDuration     = "x-ms-lease-duration"
+	leaseProposedID   = "x-ms-proposed-lease-id"
+	leaseTime         = "x-ms-lease-time"
+
+	acquireLease = "acquire"
+	renewLease   = "renew"
+	changeLease  = "change"
+	releaseLease = "release"
+	breakLease   = "break"
+)
+
 // BlockListType is used to filter out types of blocks in a Get Blocks List call
 // for a block blob.
 //
@ -419,7 +503,6 @@ func (b BlobStorageClient) ListBlobs(container string, params ListBlobsParameter
 func (b BlobStorageClient) BlobExists(container, name string) (bool, error) {
 	verb := "HEAD"
 	uri := b.client.getEndpoint(blobServiceName, pathForBlob(container, name), url.Values{})
-
 	headers := b.client.getStandardHeaders()
 	resp, err := b.client.exec(verb, uri, headers, nil)
 	if resp != nil {
@ -447,7 +530,7 @@ func (b BlobStorageClient) GetBlobURL(container, name string) string {
 //
 // See https://msdn.microsoft.com/en-us/library/azure/dd179440.aspx
 func (b BlobStorageClient) GetBlob(container, name string) (io.ReadCloser, error) {
-	resp, err := b.getBlobRange(container, name, "")
+	resp, err := b.getBlobRange(container, name, "", nil)
 	if err != nil {
 		return nil, err
 	}
@ -462,8 +545,8 @@ func (b BlobStorageClient) GetBlob(container, name string) (io.ReadCloser, error
 // string must be in a format like "0-", "10-100" as defined in HTTP 1.1 spec.
 //
 // See https://msdn.microsoft.com/en-us/library/azure/dd179440.aspx
-func (b BlobStorageClient) GetBlobRange(container, name, bytesRange string) (io.ReadCloser, error) {
-	resp, err := b.getBlobRange(container, name, bytesRange)
+func (b BlobStorageClient) GetBlobRange(container, name, bytesRange string, extraHeaders map[string]string) (io.ReadCloser, error) {
+	resp, err := b.getBlobRange(container, name, bytesRange, extraHeaders)
 	if err != nil {
 		return nil, err
 	}
@ -474,7 +557,7 @@ func (b BlobStorageClient) GetBlobRange(container, name, bytesRange string) (io.
 	return resp.body, nil
 }

-func (b BlobStorageClient) getBlobRange(container, name, bytesRange string) (*storageResponse, error) {
+func (b BlobStorageClient) getBlobRange(container, name, bytesRange string, extraHeaders map[string]string) (*storageResponse, error) {
 	verb := "GET"
 	uri := b.client.getEndpoint(blobServiceName, pathForBlob(container, name), url.Values{})

@ -482,6 +565,11 @@ func (b BlobStorageClient) getBlobRange(container, name, bytesRange string) (*st
 	if bytesRange != "" {
 		headers["Range"] = fmt.Sprintf("bytes=%s", bytesRange)
 	}
+
+	for k, v := range extraHeaders {
+		headers[k] = v
+	}
+
 	resp, err := b.client.exec(verb, uri, headers, nil)
 	if err != nil {
 		return nil, err
@ -489,6 +577,134 @@ func (b BlobStorageClient) getBlobRange(container, name, bytesRange string) (*st
 	return resp, err
 }

+// leasePut is common PUT code for the various aquire/release/break etc functions.
+func (b BlobStorageClient) leaseCommonPut(container string, name string, headers map[string]string, expectedStatus int) (http.Header, error) {
+	params := url.Values{"comp": {"lease"}}
+	uri := b.client.getEndpoint(blobServiceName, pathForBlob(container, name), params)
+
+	resp, err := b.client.exec("PUT", uri, headers, nil)
+	if err != nil {
+		return nil, err
+	}
+	defer resp.body.Close()
+
+	if err := checkRespCode(resp.statusCode, []int{expectedStatus}); err != nil {
+		return nil, err
+	}
+
+	return resp.headers, nil
+}
+
+// AcquireLease creates a lease for a blob as per https://msdn.microsoft.com/en-us/library/azure/ee691972.aspx
+// returns leaseID acquired
+func (b BlobStorageClient) AcquireLease(container string, name string, leaseTimeInSeconds int, proposedLeaseID string) (returnedLeaseID string, err error) {
+	headers := b.client.getStandardHeaders()
+	headers[leaseAction] = acquireLease
+	headers[leaseProposedID] = proposedLeaseID
+	headers[leaseDuration] = strconv.Itoa(leaseTimeInSeconds)
+
+	respHeaders, err := b.leaseCommonPut(container, name, headers, http.StatusCreated)
+	if err != nil {
+		return "", err
+	}
+
+	returnedLeaseID = respHeaders.Get(http.CanonicalHeaderKey(leaseID))
+
+	if returnedLeaseID != "" {
+		return returnedLeaseID, nil
+	}
+
+	// what should we return in case of HTTP 201 but no lease ID?
+	// or it just cant happen? (brave words)
+	return "", errors.New("LeaseID not returned")
+}
+
+// BreakLease breaks the lease for a blob as per https://msdn.microsoft.com/en-us/library/azure/ee691972.aspx
+// Returns the timeout remaining in the lease in seconds
+func (b BlobStorageClient) BreakLease(container string, name string) (breakTimeout int, err error) {
+	headers := b.client.getStandardHeaders()
+	headers[leaseAction] = breakLease
+	return b.breakLeaseCommon(container, name, headers)
+}
+
+// BreakLeaseWithBreakPeriod breaks the lease for a blob as per https://msdn.microsoft.com/en-us/library/azure/ee691972.aspx
+// breakPeriodInSeconds is used to determine how long until new lease can be created.
+// Returns the timeout remaining in the lease in seconds
+func (b BlobStorageClient) BreakLeaseWithBreakPeriod(container string, name string, breakPeriodInSeconds int) (breakTimeout int, err error) {
+	headers := b.client.getStandardHeaders()
+	headers[leaseAction] = breakLease
+	headers[leaseBreakPeriod] = strconv.Itoa(breakPeriodInSeconds)
+	return b.breakLeaseCommon(container, name, headers)
+}
+
+// breakLeaseCommon is common code for both version of BreakLease (with and without break period)
+func (b BlobStorageClient) breakLeaseCommon(container string, name string, headers map[string]string) (breakTimeout int, err error) {
+
+	respHeaders, err := b.leaseCommonPut(container, name, headers, http.StatusAccepted)
+	if err != nil {
+		return 0, err
+	}
+
+	breakTimeoutStr := respHeaders.Get(http.CanonicalHeaderKey(leaseTime))
+	if breakTimeoutStr != "" {
+		breakTimeout, err = strconv.Atoi(breakTimeoutStr)
+		if err != nil {
+			return 0, err
+		}
+	}
+
+	return breakTimeout, nil
+}
+
+// ChangeLease changes a lease ID for a blob as per https://msdn.microsoft.com/en-us/library/azure/ee691972.aspx
+// Returns the new LeaseID acquired
+func (b BlobStorageClient) ChangeLease(container string, name string, currentLeaseID string, proposedLeaseID string) (newLeaseID string, err error) {
+	headers := b.client.getStandardHeaders()
+	headers[leaseAction] = changeLease
+	headers[leaseID] = currentLeaseID
+	headers[leaseProposedID] = proposedLeaseID
+
+	respHeaders, err := b.leaseCommonPut(container, name, headers, http.StatusOK)
+	if err != nil {
+		return "", err
+	}
+
+	newLeaseID = respHeaders.Get(http.CanonicalHeaderKey(leaseID))
+	if newLeaseID != "" {
+		return newLeaseID, nil
+	}
+
+	return "", errors.New("LeaseID not returned")
+}
+
+// ReleaseLease releases the lease for a blob as per https://msdn.microsoft.com/en-us/library/azure/ee691972.aspx
+func (b BlobStorageClient) ReleaseLease(container string, name string, currentLeaseID string) error {
+	headers := b.client.getStandardHeaders()
+	headers[leaseAction] = releaseLease
+	headers[leaseID] = currentLeaseID
+
+	_, err := b.leaseCommonPut(container, name, headers, http.StatusOK)
+	if err != nil {
+		return err
+	}
+
+	return nil
+}
+
+// RenewLease renews the lease for a blob as per https://msdn.microsoft.com/en-us/library/azure/ee691972.aspx
+func (b BlobStorageClient) RenewLease(container string, name string, currentLeaseID string) error {
+	headers := b.client.getStandardHeaders()
+	headers[leaseAction] = renewLease
+	headers[leaseID] = currentLeaseID
+
+	_, err := b.leaseCommonPut(container, name, headers, http.StatusOK)
+	if err != nil {
+		return err
+	}
+
+	return nil
+}
+
 // GetBlobProperties provides various information about the specified
 // blob. See https://msdn.microsoft.com/en-us/library/azure/dd179394.aspx
 func (b BlobStorageClient) GetBlobProperties(container, name string) (*BlobProperties, error) {
@ -530,6 +746,9 @@ func (b BlobStorageClient) GetBlobProperties(container, name string) (*BlobPrope
 		ContentMD5:            resp.headers.Get("Content-MD5"),
 		ContentLength:         contentLength,
 		ContentEncoding:       resp.headers.Get("Content-Encoding"),
+		ContentType:           resp.headers.Get("Content-Type"),
+		CacheControl:          resp.headers.Get("Cache-Control"),
+		ContentLanguage:       resp.headers.Get("Content-Language"),
 		SequenceNumber:        sequenceNum,
 		CopyCompletionTime:    resp.headers.Get("x-ms-copy-completion-time"),
 		CopyStatusDescription: resp.headers.Get("x-ms-copy-status-description"),
@ -538,9 +757,38 @@ func (b BlobStorageClient) GetBlobProperties(container, name string) (*BlobPrope
 		CopySource:            resp.headers.Get("x-ms-copy-source"),
 		CopyStatus:            resp.headers.Get("x-ms-copy-status"),
 		BlobType:              BlobType(resp.headers.Get("x-ms-blob-type")),
+		LeaseStatus:           resp.headers.Get("x-ms-lease-status"),
 	}, nil
 }

+// SetBlobProperties replaces the BlobHeaders for the specified blob.
+//
+// Some keys may be converted to Camel-Case before sending. All keys
+// are returned in lower case by GetBlobProperties. HTTP header names
+// are case-insensitive so case munging should not matter to other
+// applications either.
+//
+// See https://msdn.microsoft.com/en-us/library/azure/ee691966.aspx
+func (b BlobStorageClient) SetBlobProperties(container, name string, blobHeaders BlobHeaders) error {
+	params := url.Values{"comp": {"properties"}}
+	uri := b.client.getEndpoint(blobServiceName, pathForBlob(container, name), params)
+	headers := b.client.getStandardHeaders()
+
+	extraHeaders := headersFromStruct(blobHeaders)
+
+	for k, v := range extraHeaders {
+		headers[k] = v
+	}
+
+	resp, err := b.client.exec("PUT", uri, headers, nil)
+	if err != nil {
+		return err
+	}
+	defer resp.body.Close()
+
+	return checkRespCode(resp.statusCode, []int{http.StatusOK})
+}
+
 // SetBlobMetadata replaces the metadata for the specified blob.
 //
 // Some keys may be converted to Camel-Case before sending. All keys
@ -549,7 +797,7 @@ func (b BlobStorageClient) GetBlobProperties(container, name string) (*BlobPrope
 // applications either.
 //
 // See https://msdn.microsoft.com/en-us/library/azure/dd179414.aspx
-func (b BlobStorageClient) SetBlobMetadata(container, name string, metadata map[string]string) error {
+func (b BlobStorageClient) SetBlobMetadata(container, name string, metadata map[string]string, extraHeaders map[string]string) error {
 	params := url.Values{"comp": {"metadata"}}
 	uri := b.client.getEndpoint(blobServiceName, pathForBlob(container, name), params)
 	headers := b.client.getStandardHeaders()
@ -557,6 +805,10 @@ func (b BlobStorageClient) SetBlobMetadata(container, name string, metadata map[
 		headers[userDefinedMetadataHeaderPrefix+k] = v
 	}

+	for k, v := range extraHeaders {
+		headers[k] = v
+	}
+
 	resp, err := b.client.exec("PUT", uri, headers, nil)
 	if err != nil {
 		return err
@ -749,14 +1001,16 @@ func (b BlobStorageClient) PutPageBlob(container, name string, size int64, extra
 // with 512-byte boundaries and chunk must be of size multiplies by 512.
 //
 // See https://msdn.microsoft.com/en-us/library/ee691975.aspx
-func (b BlobStorageClient) PutPage(container, name string, startByte, endByte int64, writeType PageWriteType, chunk []byte) error {
+func (b BlobStorageClient) PutPage(container, name string, startByte, endByte int64, writeType PageWriteType, chunk []byte, extraHeaders map[string]string) error {
 	path := fmt.Sprintf("%s/%s", container, name)
 	uri := b.client.getEndpoint(blobServiceName, path, url.Values{"comp": {"page"}})
 	headers := b.client.getStandardHeaders()
 	headers["x-ms-blob-type"] = string(BlobTypePage)
 	headers["x-ms-page-write"] = string(writeType)
 	headers["x-ms-range"] = fmt.Sprintf("bytes=%v-%v", startByte, endByte)
-
+	for k, v := range extraHeaders {
+		headers[k] = v
+	}
 	var contentLength int64
 	var data io.Reader
 	if writeType == PageWriteTypeClear {
@ -825,13 +1079,17 @@ func (b BlobStorageClient) PutAppendBlob(container, name string, extraHeaders ma
 // AppendBlock appends a block to an append blob.
 //
 // See https://msdn.microsoft.com/en-us/library/azure/mt427365.aspx
-func (b BlobStorageClient) AppendBlock(container, name string, chunk []byte) error {
+func (b BlobStorageClient) AppendBlock(container, name string, chunk []byte, extraHeaders map[string]string) error {
 	path := fmt.Sprintf("%s/%s", container, name)
 	uri := b.client.getEndpoint(blobServiceName, path, url.Values{"comp": {"appendblock"}})
 	headers := b.client.getStandardHeaders()
 	headers["x-ms-blob-type"] = string(BlobTypeAppend)
 	headers["Content-Length"] = fmt.Sprintf("%v", len(chunk))

+	for k, v := range extraHeaders {
+		headers[k] = v
+	}
+
 	resp, err := b.client.exec("PUT", uri, headers, bytes.NewReader(chunk))
 	if err != nil {
 		return err
@ -908,8 +1166,8 @@ func (b BlobStorageClient) waitForBlobCopy(container, name, copyID string) error
 // DeleteBlob deletes the given blob from the specified container.
 // If the blob does not exists at the time of the Delete Blob operation, it
 // returns error. See https://msdn.microsoft.com/en-us/library/azure/dd179413.aspx
-func (b BlobStorageClient) DeleteBlob(container, name string) error {
-	resp, err := b.deleteBlob(container, name)
+func (b BlobStorageClient) DeleteBlob(container, name string, extraHeaders map[string]string) error {
+	resp, err := b.deleteBlob(container, name, extraHeaders)
 	if err != nil {
 		return err
 	}
@ -921,19 +1179,24 @@ func (b BlobStorageClient) DeleteBlob(container, name string) error {
 // blob is deleted with this call, returns true. Otherwise returns false.
 //
 // See https://msdn.microsoft.com/en-us/library/azure/dd179413.aspx
-func (b BlobStorageClient) DeleteBlobIfExists(container, name string) (bool, error) {
-	resp, err := b.deleteBlob(container, name)
-	if resp != nil && (resp.statusCode == http.StatusAccepted || resp.statusCode == http.StatusNotFound) {
-		return resp.statusCode == http.StatusAccepted, nil
+func (b BlobStorageClient) DeleteBlobIfExists(container, name string, extraHeaders map[string]string) (bool, error) {
+	resp, err := b.deleteBlob(container, name, extraHeaders)
+	if resp != nil {
+		defer resp.body.Close()
+		if resp.statusCode == http.StatusAccepted || resp.statusCode == http.StatusNotFound {
+			return resp.statusCode == http.StatusAccepted, nil
+		}
 	}
-	defer resp.body.Close()
 	return false, err
 }

-func (b BlobStorageClient) deleteBlob(container, name string) (*storageResponse, error) {
+func (b BlobStorageClient) deleteBlob(container, name string, extraHeaders map[string]string) (*storageResponse, error) {
 	verb := "DELETE"
 	uri := b.client.getEndpoint(blobServiceName, pathForBlob(container, name), url.Values{})
 	headers := b.client.getStandardHeaders()
+	for k, v := range extraHeaders {
+		headers[k] = v
+	}

 	return b.client.exec(verb, uri, headers, nil)
 }
@ -959,10 +1222,25 @@ func (b BlobStorageClient) GetBlobSASURI(container, name string, expiry time.Tim
 		blobURL           = b.GetBlobURL(container, name)
 	)
 	canonicalizedResource, err := b.client.buildCanonicalizedResource(blobURL)
+
 	if err != nil {
 		return "", err
 	}
-	signedExpiry := expiry.Format(time.RFC3339)
+
+	// "The canonicalizedresouce portion of the string is a canonical path to the signed resource.
+	// It must include the service name (blob, table, queue or file) for version 2015-02-21 or
+	// later, the storage account name, and the resource name, and must be URL-decoded.
+	// -- https://msdn.microsoft.com/en-us/library/azure/dn140255.aspx
+
+	// We need to replace + with %2b first to avoid being treated as a space (which is correct for query strings, but not the path component).
+	canonicalizedResource = strings.Replace(canonicalizedResource, "+", "%2b", -1)
+
+	canonicalizedResource, err = url.QueryUnescape(canonicalizedResource)
+	if err != nil {
+		return "", err
+	}
+
+	signedExpiry := expiry.UTC().Format(time.RFC3339)
 	signedResource := "b"

 	stringToSign, err := blobSASStringToSign(b.client.apiVersion, canonicalizedResource, signedExpiry, signedPermissions)
--- a/vendor/github.com/Azure/azure-sdk-for-go/storage/client.go
+++ b/vendor/github.com/Azure/azure-sdk-for-go/storage/client.go
@ -4,6 +4,7 @@ package storage
 import (
 	"bytes"
 	"encoding/base64"
+	"encoding/json"
 	"encoding/xml"
 	"errors"
 	"fmt"
@ -28,15 +29,29 @@ const (

 	defaultUseHTTPS = true

+	// StorageEmulatorAccountName is the fixed storage account used by Azure Storage Emulator
+	StorageEmulatorAccountName = "devstoreaccount1"
+
+	// StorageEmulatorAccountKey is the the fixed storage account used by Azure Storage Emulator
+	StorageEmulatorAccountKey = "Eby8vdM02xNOcqFlqUwJPLlmEtlCDXJ1OUzFT50uSRZ6IFsuFq2UVErCz4I6tq/K1SZFPTOtr/KBHBeksoGMGw=="
+
 	blobServiceName  = "blob"
 	tableServiceName = "table"
 	queueServiceName = "queue"
 	fileServiceName  = "file"
+
+	storageEmulatorBlob  = "127.0.0.1:10000"
+	storageEmulatorTable = "127.0.0.1:10002"
+	storageEmulatorQueue = "127.0.0.1:10001"
 )

 // Client is the object that needs to be constructed to perform
 // operations on the storage account.
 type Client struct {
+	// HTTPClient is the http.Client used to initiate API
+	// requests.  If it is nil, http.DefaultClient is used.
+	HTTPClient *http.Client
+
 	accountName string
 	accountKey  []byte
 	useHTTPS    bool
@ -50,6 +65,11 @@ type storageResponse struct {
 	body       io.ReadCloser
 }

+type odataResponse struct {
+	storageResponse
+	odata odataErrorMessage
+}
+
 // AzureStorageServiceError contains fields of the error response from
 // Azure Storage Service REST API. See https://msdn.microsoft.com/en-us/library/azure/dd179382.aspx
 // Some fields might be specific to certain calls.
@ -64,6 +84,20 @@ type AzureStorageServiceError struct {
 	RequestID                 string
 }

+type odataErrorMessageMessage struct {
+	Lang  string `json:"lang"`
+	Value string `json:"value"`
+}
+
+type odataErrorMessageInternal struct {
+	Code    string                   `json:"code"`
+	Message odataErrorMessageMessage `json:"message"`
+}
+
+type odataErrorMessage struct {
+	Err odataErrorMessageInternal `json:"odata.error"`
+}
+
 // UnexpectedStatusCodeError is returned when a storage service responds with neither an error
 // nor with an HTTP status code indicating success.
 type UnexpectedStatusCodeError struct {
@ -90,9 +124,18 @@ func (e UnexpectedStatusCodeError) Got() int {
 // NewBasicClient constructs a Client with given storage service name and
 // key.
 func NewBasicClient(accountName, accountKey string) (Client, error) {
+	if accountName == StorageEmulatorAccountName {
+		return NewEmulatorClient()
+	}
 	return NewClient(accountName, accountKey, DefaultBaseURL, DefaultAPIVersion, defaultUseHTTPS)
 }

+//NewEmulatorClient contructs a Client intended to only work with Azure
+//Storage Emulator
+func NewEmulatorClient() (Client, error) {
+	return NewClient(StorageEmulatorAccountName, StorageEmulatorAccountKey, DefaultBaseURL, DefaultAPIVersion, false)
+}
+
 // NewClient constructs a Client. This should be used if the caller wants
 // to specify whether to use HTTPS, a specific REST API version or a custom
 // storage endpoint than Azure Public Cloud.
@ -108,7 +151,7 @@ func NewClient(accountName, accountKey, blobServiceBaseURL, apiVersion string, u

 	key, err := base64.StdEncoding.DecodeString(accountKey)
 	if err != nil {
-		return c, err
+		return c, fmt.Errorf("azure: malformed storage account key: %v", err)
 	}

 	return Client{
@ -125,8 +168,19 @@ func (c Client) getBaseURL(service string) string {
 	if c.useHTTPS {
 		scheme = "https"
 	}
-
-	host := fmt.Sprintf("%s.%s.%s", c.accountName, service, c.baseURL)
+	host := ""
+	if c.accountName == StorageEmulatorAccountName {
+		switch service {
+		case blobServiceName:
+			host = storageEmulatorBlob
+		case tableServiceName:
+			host = storageEmulatorTable
+		case queueServiceName:
+			host = storageEmulatorQueue
+		}
+	} else {
+		host = fmt.Sprintf("%s.%s.%s", c.accountName, service, c.baseURL)
+	}

 	u := &url.URL{
 		Scheme: scheme,
@ -141,8 +195,13 @@ func (c Client) getEndpoint(service, path string, params url.Values) string {
 		panic(err)
 	}

-	if path == "" {
-		path = "/" // API doesn't accept path segments not starting with '/'
+	// API doesn't accept path segments not starting with '/'
+	if !strings.HasPrefix(path, "/") {
+		path = fmt.Sprintf("/%v", path)
+	}
+
+	if c.accountName == StorageEmulatorAccountName {
+		path = fmt.Sprintf("/%v%v", StorageEmulatorAccountName, path)
 	}

 	u.Path = path
@ -162,6 +221,12 @@ func (c Client) GetQueueService() QueueServiceClient {
 	return QueueServiceClient{c}
 }

+// GetTableService returns a TableServiceClient which can operate on the table
+// service of the storage account.
+func (c Client) GetTableService() TableServiceClient {
+	return TableServiceClient{c}
+}
+
 // GetFileService returns a FileServiceClient which can operate on the file
 // service of the storage account.
 func (c Client) GetFileService() FileServiceClient {
@ -170,7 +235,7 @@ func (c Client) GetFileService() FileServiceClient {

 func (c Client) createAuthorizationHeader(canonicalizedString string) string {
 	signature := c.computeHmac256(canonicalizedString)
-	return fmt.Sprintf("%s %s:%s", "SharedKey", c.accountName, signature)
+	return fmt.Sprintf("%s %s:%s", "SharedKey", c.getCanonicalizedAccountName(), signature)
 }

 func (c Client) getAuthorizationHeader(verb, url string, headers map[string]string) (string, error) {
@ -190,6 +255,12 @@ func (c Client) getStandardHeaders() map[string]string {
 	}
 }

+func (c Client) getCanonicalizedAccountName() string {
+	// since we may be trying to access a secondary storage account, we need to
+	// remove the -secondary part of the storage name
+	return strings.TrimSuffix(c.accountName, "-secondary")
+}
+
 func (c Client) buildCanonicalizedHeader(headers map[string]string) string {
 	cm := make(map[string]string)

@ -224,6 +295,22 @@ func (c Client) buildCanonicalizedHeader(headers map[string]string) string {
 	return ch
 }

+func (c Client) buildCanonicalizedResourceTable(uri string) (string, error) {
+	errMsg := "buildCanonicalizedResourceTable error: %s"
+	u, err := url.Parse(uri)
+	if err != nil {
+		return "", fmt.Errorf(errMsg, err.Error())
+	}
+
+	cr := "/" + c.getCanonicalizedAccountName()
+
+	if len(u.Path) > 0 {
+		cr += u.Path
+	}
+
+	return cr, nil
+}
+
 func (c Client) buildCanonicalizedResource(uri string) (string, error) {
 	errMsg := "buildCanonicalizedResource error: %s"
 	u, err := url.Parse(uri)
@ -231,9 +318,13 @@ func (c Client) buildCanonicalizedResource(uri string) (string, error) {
 		return "", fmt.Errorf(errMsg, err.Error())
 	}

-	cr := "/" + c.accountName
+	cr := "/" + c.getCanonicalizedAccountName()
+
 	if len(u.Path) > 0 {
-		cr += u.Path
+		// Any portion of the CanonicalizedResource string that is derived from
+		// the resource's URI should be encoded exactly as it is in the URI.
+		// -- https://msdn.microsoft.com/en-gb/library/azure/dd179428.aspx
+		cr += u.EscapedPath()
 	}

 	params, err := url.ParseQuery(u.RawQuery)
@ -262,6 +353,7 @@ func (c Client) buildCanonicalizedResource(uri string) (string, error) {
 			}
 		}
 	}
+
 	return cr, nil
 }

@ -295,7 +387,6 @@ func (c Client) exec(verb, url string, headers map[string]string, body io.Reader
 		return nil, err
 	}
 	headers["Authorization"] = authHeader
-
 	if err != nil {
 		return nil, err
 	}
@ -318,7 +409,11 @@ func (c Client) exec(verb, url string, headers map[string]string, body io.Reader
 	for k, v := range headers {
 		req.Header.Add(k, v)
 	}
-	httpClient := http.Client{}
+
+	httpClient := c.HTTPClient
+	if httpClient == nil {
+		httpClient = http.DefaultClient
+	}
 	resp, err := httpClient.Do(req)
 	if err != nil {
 		return nil, err
@ -356,6 +451,70 @@ func (c Client) exec(verb, url string, headers map[string]string, body io.Reader
 		body:       resp.Body}, nil
 }

+func (c Client) execInternalJSON(verb, url string, headers map[string]string, body io.Reader) (*odataResponse, error) {
+	req, err := http.NewRequest(verb, url, body)
+	for k, v := range headers {
+		req.Header.Add(k, v)
+	}
+
+	httpClient := c.HTTPClient
+	if httpClient == nil {
+		httpClient = http.DefaultClient
+	}
+
+	resp, err := httpClient.Do(req)
+	if err != nil {
+		return 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 = readResponseBody(resp)
+		if err != nil {
+			return nil, err
+		}
+
+		if len(respBody) == 0 {
+			// no error in response body
+			err = fmt.Errorf("storage: service returned without a response body (%d)", resp.StatusCode)
+			return respToRet, err
+		}
+		// try unmarshal as odata.error json
+		err = json.Unmarshal(respBody, &respToRet.odata)
+		return respToRet, err
+	}
+
+	return respToRet, nil
+}
+
+func (c Client) createSharedKeyLite(url string, headers map[string]string) (string, error) {
+	can, err := c.buildCanonicalizedResourceTable(url)
+
+	if err != nil {
+		return "", err
+	}
+	strToSign := headers["x-ms-date"] + "\n" + can
+
+	hmac := c.computeHmac256(strToSign)
+	return fmt.Sprintf("SharedKeyLite %s:%s", c.accountName, hmac), nil
+}
+
+func (c Client) execTable(verb, url string, headers map[string]string, body io.Reader) (*odataResponse, error) {
+	var err error
+	headers["Authorization"], err = c.createSharedKeyLite(url, headers)
+	if err != nil {
+		return nil, err
+	}
+
+	return c.execInternalJSON(verb, url, headers, body)
+}
+
 func readResponseBody(resp *http.Response) ([]byte, error) {
 	defer resp.Body.Close()
 	out, err := ioutil.ReadAll(resp.Body)
--- a/vendor/github.com/Azure/azure-sdk-for-go/storage/file.go
+++ b/vendor/github.com/Azure/azure-sdk-for-go/storage/file.go
@ -1,9 +1,11 @@
 package storage

 import (
+	"encoding/xml"
 	"fmt"
 	"net/http"
 	"net/url"
+	"strings"
 )

 // FileServiceClient contains operations for Microsoft Azure File Service.
@ -11,11 +13,99 @@ type FileServiceClient struct {
 	client Client
 }

+// A Share is an entry in ShareListResponse.
+type Share struct {
+	Name       string          `xml:"Name"`
+	Properties ShareProperties `xml:"Properties"`
+}
+
+// ShareProperties contains various properties of a share returned from
+// various endpoints like ListShares.
+type ShareProperties struct {
+	LastModified string `xml:"Last-Modified"`
+	Etag         string `xml:"Etag"`
+	Quota        string `xml:"Quota"`
+}
+
+// ShareListResponse contains the response fields from
+// ListShares call.
+//
+// See https://msdn.microsoft.com/en-us/library/azure/dn167009.aspx
+type ShareListResponse struct {
+	XMLName    xml.Name `xml:"EnumerationResults"`
+	Xmlns      string   `xml:"xmlns,attr"`
+	Prefix     string   `xml:"Prefix"`
+	Marker     string   `xml:"Marker"`
+	NextMarker string   `xml:"NextMarker"`
+	MaxResults int64    `xml:"MaxResults"`
+	Shares     []Share  `xml:"Shares>Share"`
+}
+
+// ListSharesParameters defines the set of customizable parameters to make a
+// List Shares call.
+//
+// See https://msdn.microsoft.com/en-us/library/azure/dn167009.aspx
+type ListSharesParameters struct {
+	Prefix     string
+	Marker     string
+	Include    string
+	MaxResults uint
+	Timeout    uint
+}
+
+// ShareHeaders contains various properties of a file and is an entry
+// in SetShareProperties
+type ShareHeaders struct {
+	Quota string `header:"x-ms-share-quota"`
+}
+
+func (p ListSharesParameters) getParameters() url.Values {
+	out := url.Values{}
+
+	if p.Prefix != "" {
+		out.Set("prefix", p.Prefix)
+	}
+	if p.Marker != "" {
+		out.Set("marker", p.Marker)
+	}
+	if p.Include != "" {
+		out.Set("include", p.Include)
+	}
+	if p.MaxResults != 0 {
+		out.Set("maxresults", fmt.Sprintf("%v", p.MaxResults))
+	}
+	if p.Timeout != 0 {
+		out.Set("timeout", fmt.Sprintf("%v", p.Timeout))
+	}
+
+	return out
+}
+
 // pathForFileShare returns the URL path segment for a File Share resource
 func pathForFileShare(name string) string {
 	return fmt.Sprintf("/%s", name)
 }

+// ListShares returns the list of shares in a storage account along with
+// pagination token and other response details.
+//
+// See https://msdn.microsoft.com/en-us/library/azure/dd179352.aspx
+func (f FileServiceClient) ListShares(params ListSharesParameters) (ShareListResponse, error) {
+	q := mergeParams(params.getParameters(), url.Values{"comp": {"list"}})
+	uri := f.client.getEndpoint(fileServiceName, "", q)
+	headers := f.client.getStandardHeaders()
+
+	var out ShareListResponse
+	resp, err := f.client.exec("GET", uri, headers, nil)
+	if err != nil {
+		return out, err
+	}
+	defer resp.body.Close()
+
+	err = xmlUnmarshal(resp.body, &out)
+	return out, err
+}
+
 // CreateShare operation creates a new share under the specified account. If the
 // share with the same name already exists, the operation fails.
 //
@ -29,6 +119,30 @@ func (f FileServiceClient) CreateShare(name string) error {
 	return checkRespCode(resp.statusCode, []int{http.StatusCreated})
 }

+// ShareExists returns true if a share with given name exists
+// on the storage account, otherwise returns false.
+func (f FileServiceClient) ShareExists(name string) (bool, error) {
+	uri := f.client.getEndpoint(fileServiceName, pathForFileShare(name), url.Values{"restype": {"share"}})
+	headers := f.client.getStandardHeaders()
+
+	resp, err := f.client.exec("HEAD", uri, headers, nil)
+	if resp != nil {
+		defer resp.body.Close()
+		if resp.statusCode == http.StatusOK || resp.statusCode == http.StatusNotFound {
+			return resp.statusCode == http.StatusOK, nil
+		}
+	}
+	return false, err
+}
+
+// GetShareURL gets the canonical URL to the share with the specified name in the
+// specified container. This method does not create a publicly accessible URL if
+// the file is private and this method does not check if the file
+// exists.
+func (f FileServiceClient) GetShareURL(name string) string {
+	return f.client.getEndpoint(fileServiceName, pathForFileShare(name), url.Values{})
+}
+
 // CreateShareIfNotExists creates a new share under the specified account if
 // it does not exist. Returns true if container is newly created or false if
 // container already exists.
@ -47,11 +161,68 @@ func (f FileServiceClient) CreateShareIfNotExists(name string) (bool, error) {

 // CreateShare creates a Azure File Share and returns its response
 func (f FileServiceClient) createShare(name string) (*storageResponse, error) {
+	if err := f.checkForStorageEmulator(); err != nil {
+		return nil, err
+	}
 	uri := f.client.getEndpoint(fileServiceName, pathForFileShare(name), url.Values{"restype": {"share"}})
 	headers := f.client.getStandardHeaders()
 	return f.client.exec("PUT", uri, headers, nil)
 }

+// GetShareProperties provides various information about the specified
+// file. See https://msdn.microsoft.com/en-us/library/azure/dn689099.aspx
+func (f FileServiceClient) GetShareProperties(name string) (*ShareProperties, error) {
+	uri := f.client.getEndpoint(fileServiceName, pathForFileShare(name), url.Values{"restype": {"share"}})
+
+	headers := f.client.getStandardHeaders()
+	resp, err := f.client.exec("HEAD", uri, headers, nil)
+	if err != nil {
+		return nil, err
+	}
+	defer resp.body.Close()
+
+	if err := checkRespCode(resp.statusCode, []int{http.StatusOK}); err != nil {
+		return nil, err
+	}
+
+	return &ShareProperties{
+		LastModified: resp.headers.Get("Last-Modified"),
+		Etag:         resp.headers.Get("Etag"),
+		Quota:        resp.headers.Get("x-ms-share-quota"),
+	}, nil
+}
+
+// SetShareProperties replaces the ShareHeaders for the specified file.
+//
+// Some keys may be converted to Camel-Case before sending. All keys
+// are returned in lower case by SetShareProperties. HTTP header names
+// are case-insensitive so case munging should not matter to other
+// applications either.
+//
+// See https://msdn.microsoft.com/en-us/library/azure/mt427368.aspx
+func (f FileServiceClient) SetShareProperties(name string, shareHeaders ShareHeaders) error {
+	params := url.Values{}
+	params.Set("restype", "share")
+	params.Set("comp", "properties")
+
+	uri := f.client.getEndpoint(fileServiceName, pathForFileShare(name), params)
+	headers := f.client.getStandardHeaders()
+
+	extraHeaders := headersFromStruct(shareHeaders)
+
+	for k, v := range extraHeaders {
+		headers[k] = v
+	}
+
+	resp, err := f.client.exec("PUT", uri, headers, nil)
+	if err != nil {
+		return err
+	}
+	defer resp.body.Close()
+
+	return checkRespCode(resp.statusCode, []int{http.StatusOK})
+}
+
 // DeleteShare operation marks the specified share for deletion. The share
 // and any files contained within it are later deleted during garbage
 // collection.
@ -86,6 +257,96 @@ func (f FileServiceClient) DeleteShareIfExists(name string) (bool, error) {
 // deleteShare makes the call to Delete Share operation endpoint and returns
 // the response
 func (f FileServiceClient) deleteShare(name string) (*storageResponse, error) {
+	if err := f.checkForStorageEmulator(); err != nil {
+		return nil, err
+	}
 	uri := f.client.getEndpoint(fileServiceName, pathForFileShare(name), url.Values{"restype": {"share"}})
 	return f.client.exec("DELETE", uri, f.client.getStandardHeaders(), nil)
 }
+
+// SetShareMetadata replaces the metadata for the specified Share.
+//
+// Some keys may be converted to Camel-Case before sending. All keys
+// are returned in lower case by GetShareMetadata. HTTP header names
+// are case-insensitive so case munging should not matter to other
+// applications either.
+//
+// See https://msdn.microsoft.com/en-us/library/azure/dd179414.aspx
+func (f FileServiceClient) SetShareMetadata(name string, metadata map[string]string, extraHeaders map[string]string) error {
+	params := url.Values{}
+	params.Set("restype", "share")
+	params.Set("comp", "metadata")
+
+	uri := f.client.getEndpoint(fileServiceName, pathForFileShare(name), params)
+	headers := f.client.getStandardHeaders()
+	for k, v := range metadata {
+		headers[userDefinedMetadataHeaderPrefix+k] = v
+	}
+
+	for k, v := range extraHeaders {
+		headers[k] = v
+	}
+
+	resp, err := f.client.exec("PUT", uri, headers, nil)
+	if err != nil {
+		return err
+	}
+	defer resp.body.Close()
+
+	return checkRespCode(resp.statusCode, []int{http.StatusOK})
+}
+
+// GetShareMetadata returns all user-defined metadata for the specified share.
+//
+// All metadata keys will be returned in lower case. (HTTP header
+// names are case-insensitive.)
+//
+// See https://msdn.microsoft.com/en-us/library/azure/dd179414.aspx
+func (f FileServiceClient) GetShareMetadata(name string) (map[string]string, error) {
+	params := url.Values{}
+	params.Set("restype", "share")
+	params.Set("comp", "metadata")
+
+	uri := f.client.getEndpoint(fileServiceName, pathForFileShare(name), params)
+	headers := f.client.getStandardHeaders()
+
+	resp, err := f.client.exec("GET", uri, headers, nil)
+	if err != nil {
+		return nil, err
+	}
+	defer resp.body.Close()
+
+	if err := checkRespCode(resp.statusCode, []int{http.StatusOK}); err != nil {
+		return nil, err
+	}
+
+	metadata := make(map[string]string)
+	for k, v := range resp.headers {
+		// Can't trust CanonicalHeaderKey() to munge case
+		// reliably. "_" is allowed in identifiers:
+		// https://msdn.microsoft.com/en-us/library/azure/dd179414.aspx
+		// https://msdn.microsoft.com/library/aa664670(VS.71).aspx
+		// http://tools.ietf.org/html/rfc7230#section-3.2
+		// ...but "_" is considered invalid by
+		// CanonicalMIMEHeaderKey in
+		// https://golang.org/src/net/textproto/reader.go?s=14615:14659#L542
+		// so k can be "X-Ms-Meta-Foo" or "x-ms-meta-foo_bar".
+		k = strings.ToLower(k)
+		if len(v) == 0 || !strings.HasPrefix(k, strings.ToLower(userDefinedMetadataHeaderPrefix)) {
+			continue
+		}
+		// metadata["foo"] = content of the last X-Ms-Meta-Foo header
+		k = k[len(userDefinedMetadataHeaderPrefix):]
+		metadata[k] = v[len(v)-1]
+	}
+	return metadata, nil
+}
+
+//checkForStorageEmulator determines if the client is setup for use with
+//Azure Storage Emulator, and returns a relevant error
+func (f FileServiceClient) checkForStorageEmulator() error {
+	if f.client.accountName == StorageEmulatorAccountName {
+		return fmt.Errorf("Error: File service is not currently supported by Azure Storage Emulator")
+	}
+	return nil
+}
--- a/vendor/github.com/Azure/azure-sdk-for-go/storage/table.go
+++ b/vendor/github.com/Azure/azure-sdk-for-go/storage/table.go
@ -0,0 +1,129 @@
+package storage
+
+import (
+	"bytes"
+	"encoding/json"
+	"fmt"
+	"net/http"
+	"net/url"
+)
+
+// TableServiceClient contains operations for Microsoft Azure Table Storage
+// Service.
+type TableServiceClient struct {
+	client Client
+}
+
+// AzureTable is the typedef of the Azure Table name
+type AzureTable string
+
+const (
+	tablesURIPath = "/Tables"
+)
+
+type createTableRequest struct {
+	TableName string `json:"TableName"`
+}
+
+func pathForTable(table AzureTable) string { return fmt.Sprintf("%s", table) }
+
+func (c *TableServiceClient) getStandardHeaders() map[string]string {
+	return map[string]string{
+		"x-ms-version":   "2015-02-21",
+		"x-ms-date":      currentTimeRfc1123Formatted(),
+		"Accept":         "application/json;odata=nometadata",
+		"Accept-Charset": "UTF-8",
+		"Content-Type":   "application/json",
+	}
+}
+
+// QueryTables returns the tables created in the
+// *TableServiceClient storage account.
+func (c *TableServiceClient) QueryTables() ([]AzureTable, error) {
+	uri := c.client.getEndpoint(tableServiceName, tablesURIPath, url.Values{})
+
+	headers := c.getStandardHeaders()
+	headers["Content-Length"] = "0"
+
+	resp, err := c.client.execTable("GET", uri, headers, nil)
+	if err != nil {
+		return nil, err
+	}
+	defer resp.body.Close()
+
+	if err := checkRespCode(resp.statusCode, []int{http.StatusOK}); err != nil {
+		return nil, err
+	}
+
+	buf := new(bytes.Buffer)
+	buf.ReadFrom(resp.body)
+
+	var respArray queryTablesResponse
+	if err := json.Unmarshal(buf.Bytes(), &respArray); err != nil {
+		return nil, err
+	}
+
+	s := make([]AzureTable, len(respArray.TableName))
+	for i, elem := range respArray.TableName {
+		s[i] = AzureTable(elem.TableName)
+	}
+
+	return s, nil
+}
+
+// CreateTable creates the table given the specific
+// name. This function fails if the name is not compliant
+// with the specification or the tables already exists.
+func (c *TableServiceClient) CreateTable(table AzureTable) error {
+	uri := c.client.getEndpoint(tableServiceName, tablesURIPath, url.Values{})
+
+	headers := c.getStandardHeaders()
+
+	req := createTableRequest{TableName: string(table)}
+	buf := new(bytes.Buffer)
+
+	if err := json.NewEncoder(buf).Encode(req); err != nil {
+		return err
+	}
+
+	headers["Content-Length"] = fmt.Sprintf("%d", buf.Len())
+
+	resp, err := c.client.execTable("POST", uri, headers, buf)
+
+	if err != nil {
+		return err
+	}
+	defer resp.body.Close()
+
+	if err := checkRespCode(resp.statusCode, []int{http.StatusCreated}); err != nil {
+		return err
+	}
+
+	return nil
+}
+
+// DeleteTable deletes the table given the specific
+// name. This function fails if the table is not present.
+// Be advised: DeleteTable deletes all the entries
+// that may be present.
+func (c *TableServiceClient) DeleteTable(table AzureTable) error {
+	uri := c.client.getEndpoint(tableServiceName, tablesURIPath, url.Values{})
+	uri += fmt.Sprintf("('%s')", string(table))
+
+	headers := c.getStandardHeaders()
+
+	headers["Content-Length"] = "0"
+
+	resp, err := c.client.execTable("DELETE", uri, headers, nil)
+
+	if err != nil {
+		return err
+	}
+	defer resp.body.Close()
+
+	if err := checkRespCode(resp.statusCode, []int{http.StatusNoContent}); err != nil {
+		return err
+
+	}
+	return nil
+}
--- a/vendor/github.com/Azure/azure-sdk-for-go/storage/table_entities.go
+++ b/vendor/github.com/Azure/azure-sdk-for-go/storage/table_entities.go
@ -0,0 +1,355 @@
+package storage
+
+import (
+	"bytes"
+	"encoding/json"
+	"fmt"
+	"io"
+	"net/http"
+	"net/url"
+	"reflect"
+)
+
+const (
+	partitionKeyNode                    = "PartitionKey"
+	rowKeyNode                          = "RowKey"
+	tag                                 = "table"
+	tagIgnore                           = "-"
+	continuationTokenPartitionKeyHeader = "X-Ms-Continuation-Nextpartitionkey"
+	continuationTokenRowHeader          = "X-Ms-Continuation-Nextrowkey"
+	maxTopParameter                     = 1000
+)
+
+type queryTablesResponse struct {
+	TableName []struct {
+		TableName string `json:"TableName"`
+	} `json:"value"`
+}
+
+const (
+	tableOperationTypeInsert          = iota
+	tableOperationTypeUpdate          = iota
+	tableOperationTypeMerge           = iota
+	tableOperationTypeInsertOrReplace = iota
+	tableOperationTypeInsertOrMerge   = iota
+)
+
+type tableOperation int
+
+// TableEntity interface specifies
+// the functions needed to support
+// marshaling and unmarshaling into
+// Azure Tables. The struct must only contain
+// simple types because Azure Tables do not
+// support hierarchy.
+type TableEntity interface {
+	PartitionKey() string
+	RowKey() string
+	SetPartitionKey(string) error
+	SetRowKey(string) error
+}
+
+// ContinuationToken is an opaque (ie not useful to inspect)
+// struct that Get... methods can return if there are more
+// entries to be returned than the ones already
+// returned. Just pass it to the same function to continue
+// receiving the remaining entries.
+type ContinuationToken struct {
+	NextPartitionKey string
+	NextRowKey       string
+}
+
+type getTableEntriesResponse struct {
+	Elements []map[string]interface{} `json:"value"`
+}
+
+// QueryTableEntities queries the specified table and returns the unmarshaled
+// entities of type retType.
+// top parameter limits the returned entries up to top. Maximum top
+// allowed by Azure API is 1000. In case there are more than top entries to be
+// returned the function will return a non nil *ContinuationToken. You can call the
+// same function again passing the received ContinuationToken as previousContToken
+// parameter in order to get the following entries. The query parameter
+// is the odata query. To retrieve all the entries pass the empty string.
+// The function returns a pointer to a TableEntity slice, the *ContinuationToken
+// if there are more entries to be returned and an error in case something went
+// wrong.
+//
+// Example:
+// 		entities, cToken, err = tSvc.QueryTableEntities("table", cToken, reflect.TypeOf(entity), 20, "")
+func (c *TableServiceClient) QueryTableEntities(tableName AzureTable, previousContToken *ContinuationToken, retType reflect.Type, top int, query string) ([]TableEntity, *ContinuationToken, error) {
+	if top > maxTopParameter {
+		return nil, nil, fmt.Errorf("top accepts at maximum %d elements. Requested %d instead", maxTopParameter, top)
+	}
+
+	uri := c.client.getEndpoint(tableServiceName, pathForTable(tableName), url.Values{})
+	uri += fmt.Sprintf("?$top=%d", top)
+	if query != "" {
+		uri += fmt.Sprintf("&$filter=%s", url.QueryEscape(query))
+	}
+
+	if previousContToken != nil {
+		uri += fmt.Sprintf("&NextPartitionKey=%s&NextRowKey=%s", previousContToken.NextPartitionKey, previousContToken.NextRowKey)
+	}
+
+	headers := c.getStandardHeaders()
+
+	headers["Content-Length"] = "0"
+
+	resp, err := c.client.execTable("GET", uri, headers, nil)
+
+	if err != nil {
+		return nil, nil, err
+	}
+
+	contToken := extractContinuationTokenFromHeaders(resp.headers)
+
+	if err != nil {
+		return nil, contToken, err
+	}
+	defer resp.body.Close()
+
+	if err := checkRespCode(resp.statusCode, []int{http.StatusOK}); err != nil {
+		return nil, contToken, err
+	}
+
+	retEntries, err := deserializeEntity(retType, resp.body)
+	if err != nil {
+		return nil, contToken, err
+	}
+
+	return retEntries, contToken, nil
+}
+
+// InsertEntity inserts an entity in the specified table.
+// The function fails if there is an entity with the same
+// PartitionKey and RowKey in the table.
+func (c *TableServiceClient) InsertEntity(table AzureTable, entity TableEntity) error {
+	var err error
+
+	if sc, err := c.execTable(table, entity, false, "POST"); err != nil {
+		return checkRespCode(sc, []int{http.StatusCreated})
+	}
+
+	return err
+}
+
+func (c *TableServiceClient) execTable(table AzureTable, entity TableEntity, specifyKeysInURL bool, method string) (int, error) {
+	uri := c.client.getEndpoint(tableServiceName, pathForTable(table), url.Values{})
+	if specifyKeysInURL {
+		uri += fmt.Sprintf("(PartitionKey='%s',RowKey='%s')", url.QueryEscape(entity.PartitionKey()), url.QueryEscape(entity.RowKey()))
+	}
+
+	headers := c.getStandardHeaders()
+
+	var buf bytes.Buffer
+
+	if err := injectPartitionAndRowKeys(entity, &buf); err != nil {
+		return 0, err
+	}
+
+	headers["Content-Length"] = fmt.Sprintf("%d", buf.Len())
+
+	var err error
+	var resp *odataResponse
+
+	resp, err = c.client.execTable(method, uri, headers, &buf)
+
+	if err != nil {
+		return 0, err
+	}
+
+	defer resp.body.Close()
+
+	return resp.statusCode, nil
+}
+
+// UpdateEntity updates the contents of an entity with the
+// one passed as parameter. The function fails if there is no entity
+// with the same PartitionKey and RowKey in the table.
+func (c *TableServiceClient) UpdateEntity(table AzureTable, entity TableEntity) error {
+	var err error
+
+	if sc, err := c.execTable(table, entity, true, "PUT"); err != nil {
+		return checkRespCode(sc, []int{http.StatusNoContent})
+	}
+	return err
+}
+
+// MergeEntity merges the contents of an entity with the
+// one passed as parameter.
+// The function fails if there is no entity
+// with the same PartitionKey and RowKey in the table.
+func (c *TableServiceClient) MergeEntity(table AzureTable, entity TableEntity) error {
+	var err error
+
+	if sc, err := c.execTable(table, entity, true, "MERGE"); err != nil {
+		return checkRespCode(sc, []int{http.StatusNoContent})
+	}
+	return err
+}
+
+// DeleteEntityWithoutCheck deletes the entity matching by
+// PartitionKey and RowKey. There is no check on IfMatch
+// parameter so the entity is always deleted.
+// The function fails if there is no entity
+// with the same PartitionKey and RowKey in the table.
+func (c *TableServiceClient) DeleteEntityWithoutCheck(table AzureTable, entity TableEntity) error {
+	return c.DeleteEntity(table, entity, "*")
+}
+
+// DeleteEntity deletes the entity matching by
+// PartitionKey, RowKey and ifMatch field.
+// The function fails if there is no entity
+// with the same PartitionKey and RowKey in the table or
+// the ifMatch is different.
+func (c *TableServiceClient) DeleteEntity(table AzureTable, entity TableEntity, ifMatch string) error {
+	uri := c.client.getEndpoint(tableServiceName, pathForTable(table), url.Values{})
+	uri += fmt.Sprintf("(PartitionKey='%s',RowKey='%s')", url.QueryEscape(entity.PartitionKey()), url.QueryEscape(entity.RowKey()))
+
+	headers := c.getStandardHeaders()
+
+	headers["Content-Length"] = "0"
+	headers["If-Match"] = ifMatch
+
+	resp, err := c.client.execTable("DELETE", uri, headers, nil)
+
+	if err != nil {
+		return err
+	}
+	defer resp.body.Close()
+
+	if err := checkRespCode(resp.statusCode, []int{http.StatusNoContent}); err != nil {
+		return err
+	}
+
+	return nil
+}
+
+// InsertOrReplaceEntity inserts an entity in the specified table
+// or replaced the existing one.
+func (c *TableServiceClient) InsertOrReplaceEntity(table AzureTable, entity TableEntity) error {
+	var err error
+
+	if sc, err := c.execTable(table, entity, true, "PUT"); err != nil {
+		return checkRespCode(sc, []int{http.StatusNoContent})
+	}
+	return err
+}
+
+// InsertOrMergeEntity inserts an entity in the specified table
+// or merges the existing one.
+func (c *TableServiceClient) InsertOrMergeEntity(table AzureTable, entity TableEntity) error {
+	var err error
+
+	if sc, err := c.execTable(table, entity, true, "MERGE"); err != nil {
+		return checkRespCode(sc, []int{http.StatusNoContent})
+	}
+	return err
+}
+
+func injectPartitionAndRowKeys(entity TableEntity, buf *bytes.Buffer) error {
+	if err := json.NewEncoder(buf).Encode(entity); err != nil {
+		return err
+	}
+
+	dec := make(map[string]interface{})
+	if err := json.NewDecoder(buf).Decode(&dec); err != nil {
+		return err
+	}
+
+	// Inject PartitionKey and RowKey
+	dec[partitionKeyNode] = entity.PartitionKey()
+	dec[rowKeyNode] = entity.RowKey()
+
+	// Remove tagged fields
+	// The tag is defined in the const section
+	// This is useful to avoid storing the PartitionKey and RowKey twice.
+	numFields := reflect.ValueOf(entity).Elem().NumField()
+	for i := 0; i < numFields; i++ {
+		f := reflect.ValueOf(entity).Elem().Type().Field(i)
+
+		if f.Tag.Get(tag) == tagIgnore {
+			// we must look for its JSON name in the dictionary
+			// as the user can rename it using a tag
+			jsonName := f.Name
+			if f.Tag.Get("json") != "" {
+				jsonName = f.Tag.Get("json")
+			}
+			delete(dec, jsonName)
+		}
+	}
+
+	buf.Reset()
+
+	if err := json.NewEncoder(buf).Encode(&dec); err != nil {
+		return err
+	}
+
+	return nil
+}
+
+func deserializeEntity(retType reflect.Type, reader io.Reader) ([]TableEntity, error) {
+	buf := new(bytes.Buffer)
+
+	var ret getTableEntriesResponse
+	if err := json.NewDecoder(reader).Decode(&ret); err != nil {
+		return nil, err
+	}
+
+	tEntries := make([]TableEntity, len(ret.Elements))
+
+	for i, entry := range ret.Elements {
+
+		buf.Reset()
+		if err := json.NewEncoder(buf).Encode(entry); err != nil {
+			return nil, err
+		}
+
+		dec := make(map[string]interface{})
+		if err := json.NewDecoder(buf).Decode(&dec); err != nil {
+			return nil, err
+		}
+
+		var pKey, rKey string
+		// strip pk and rk
+		for key, val := range dec {
+			switch key {
+			case partitionKeyNode:
+				pKey = val.(string)
+			case rowKeyNode:
+				rKey = val.(string)
+			}
+		}
+
+		delete(dec, partitionKeyNode)
+		delete(dec, rowKeyNode)
+
+		buf.Reset()
+		if err := json.NewEncoder(buf).Encode(dec); err != nil {
+			return nil, err
+		}
+
+		// Create a empty retType instance
+		tEntries[i] = reflect.New(retType.Elem()).Interface().(TableEntity)
+		// Popolate it with the values
+		if err := json.NewDecoder(buf).Decode(&tEntries[i]); err != nil {
+			return nil, err
+		}
+
+		// Reset PartitionKey and RowKey
+		tEntries[i].SetPartitionKey(pKey)
+		tEntries[i].SetRowKey(rKey)
+	}
+
+	return tEntries, nil
+}
+
+func extractContinuationTokenFromHeaders(h http.Header) *ContinuationToken {
+	ct := ContinuationToken{h.Get(continuationTokenPartitionKeyHeader), h.Get(continuationTokenRowHeader)}
+
+	if ct.NextPartitionKey != "" && ct.NextRowKey != "" {
+		return &ct
+	}
+	return nil
+}
--- a/vendor/github.com/Azure/azure-sdk-for-go/storage/util.go
+++ b/vendor/github.com/Azure/azure-sdk-for-go/storage/util.go
@ -11,6 +11,7 @@ import (
 	"io/ioutil"
 	"net/http"
 	"net/url"
+	"reflect"
 	"time"
 )

@ -69,3 +70,16 @@ func xmlMarshal(v interface{}) (io.Reader, int, error) {
 	}
 	return bytes.NewReader(b), len(b), nil
 }
+
+func headersFromStruct(v interface{}) map[string]string {
+	headers := make(map[string]string)
+	value := reflect.ValueOf(v)
+	for i := 0; i < value.NumField(); i++ {
+		key := value.Type().Field(i).Tag.Get("header")
+		val := value.Field(i).String()
+		if val != "" {
+			headers[key] = val
+		}
+	}
+	return headers
+}