Update Azure GO SDK to v12.1.0

vendor/github.com/Azure/azure-sdk-for-go/storage/client.go

@@ -31,6 +31,7 @@ import (
 	"net/url"
 	"regexp"
 	"runtime"
+	"strconv"
 	"strings"
 	"time"
 
@@ -69,6 +70,11 @@ const (
 	userAgentHeader = "User-Agent"
 
 	userDefinedMetadataHeaderPrefix = "x-ms-meta-"
+
+	connectionStringAccountName      = "accountname"
+	connectionStringAccountKey       = "accountkey"
+	connectionStringEndpointSuffix   = "endpointsuffix"
+	connectionStringEndpointProtocol = "defaultendpointsprotocol"
 )
 
 var (
@@ -204,6 +210,45 @@ func (e UnexpectedStatusCodeError) Got() int {
 	return e.got
 }
 
+// NewClientFromConnectionString creates a Client from the connection string.
+func NewClientFromConnectionString(input string) (Client, error) {
+	var (
+		accountName, accountKey, endpointSuffix string
+		useHTTPS                                = defaultUseHTTPS
+	)
+
+	for _, pair := range strings.Split(input, ";") {
+		if pair == "" {
+			continue
+		}
+
+		equalDex := strings.IndexByte(pair, '=')
+		if equalDex <= 0 {
+			return Client{}, fmt.Errorf("Invalid connection segment %q", pair)
+		}
+
+		value := pair[equalDex+1:]
+		key := strings.ToLower(pair[:equalDex])
+		switch key {
+		case connectionStringAccountName:
+			accountName = value
+		case connectionStringAccountKey:
+			accountKey = value
+		case connectionStringEndpointSuffix:
+			endpointSuffix = value
+		case connectionStringEndpointProtocol:
+			useHTTPS = value == "https"
+		default:
+			// ignored
+		}
+	}
+
+	if accountName == StorageEmulatorAccountName {
+		return NewEmulatorClient()
+	}
+	return NewClient(accountName, accountKey, endpointSuffix, DefaultAPIVersion, useHTTPS)
+}
+
 // NewBasicClient constructs a Client with given storage service name and
 // key.
 func NewBasicClient(accountName, accountKey string) (Client, error) {
@@ -613,12 +658,13 @@ func (c Client) exec(verb, url string, headers map[string]string, body io.Reader
 		return nil, errors.New("azure/storage: error creating request: " + err.Error())
 	}
 
-	// if a body was provided ensure that the content length was set.
-	// http.NewRequest() will automatically do this for a handful of types
-	// and for those that it doesn't we will handle here.
-	if body != nil && req.ContentLength < 1 {
-		if lr, ok := body.(*io.LimitedReader); ok {
-			setContentLengthFromLimitedReader(req, lr)
+	// 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
+			}
 		}
 	}