Support azure storage (#221)

* azure storage

* azure uploader

* azure uploader

* azure uploader

* fix

lib/record/utils.js

@@ -1,3 +1,4 @@
+const AzureStorageUploadStream = require('./azure-storage');
 const GoogleStorageUploadStream = require('./google-storage');
 const S3MultipartUploadStream = require('./s3-multipart-upload-stream');
 
@@ -27,6 +28,9 @@ const getUploader = (Key, metadata, bucket_credential, logger) => {
         }
       };
       return new GoogleStorageUploadStream(logger, uploaderOpts);
+    case 'azure':
+      uploaderOpts.connection_string = bucket_credential.connection_string;
+      return new AzureStorageUploadStream(logger, uploaderOpts);
 
     default:
       logger.error(`unknown bucket vendor: ${bucket_credential.vendor}`);