add AnonymousCloudCredentials class

lib/azure.js

@@ -630,6 +630,7 @@ exports.StorageServiceSettings = azureCommon.StorageServiceSettings;
 // Credentials
 exports.CertificateCloudCredentials = azureCommon.CertificateCloudCredentials;
 exports.TokenCloudCredentials = azureCommon.TokenCloudCredentials;
+exports.AnonymousCloudCredentials = azureCommon.AnonymousCloudCredentials;
 exports.SharedAccessSignature = require('./services/blob/internal/sharedaccesssignature');
 exports.SharedKey = require('./services/blob/internal/sharedkey');
 exports.SharedKeyLite = require('./services/blob/internal/sharedkeylite');

lib/common/lib/common.js

@@ -50,6 +50,7 @@ exports.ConnectionStringParser = require('./services/connectionstringparser');
 // Credentials
 exports.CertificateCloudCredentials = require('./services/credentials/certificateCloudCredentials');
 exports.TokenCloudCredentials = require('./services/credentials/tokenCloudCredentials');
+exports.AnonymousCloudCredentials = require('./services/credentials/anonymousCloudCredentials');
 
 // Other filters
 exports.LinearRetryPolicyFilter = require('./services/filters/linearretrypolicyfilter');

lib/common/lib/services/credentials/anonymousCloudCredentials.js

@@ -0,0 +1,38 @@
+//
+// Copyright (c) Microsoft and contributors.  All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+//
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+
+/**
+* Creates a new AnonymousCloudCredentials object.
+*
+* @constructor
+*/
+function AnonymousCloudCredentials(credentials) {
+  // empty body on purpose
+}
+
+/**
+* Signs a request with the Authentication header.
+*
+* @param {WebResource} The webresource to be signed.
+* @param {function(error)}  callback  The callback function.
+* @return {undefined}
+*/
+AnonymousCloudCredentials.prototype.signRequest = function (webResource, callback) {
+  // empty body on purpose
+  callback(null);
+};
+
+module.exports = AnonymousCloudCredentials;