public static AppendObjectCommand Create()

in sdk/Commands/AppendObjectCommand.cs [88:130]
35 lines of code
7 McCabe index (conditional complexity)

        public static AppendObjectCommand Create(IServiceClient client, Uri endpoint, ExecutionContext context,
                                                 AppendObjectRequest request)
        {
            OssUtils.CheckBucketName(request.BucketName);
            OssUtils.CheckObjectKey(request.Key);

            if (request.Content == null)
                throw new ArgumentNullException("request.Content");

            request.ObjectMetadata = request.ObjectMetadata ?? new ObjectMetadata();
            if (request.ObjectMetadata.ContentType == null)
                request.ObjectMetadata.ContentType = HttpUtils.GetContentType(request.Key, null);

            var conf = OssUtils.GetClientConfiguration(client);
            var originalStream = request.Content;
            var streamLength = request.Content.Length;

            // setup progress
            var callback = request.StreamTransferProgress;
            if (callback != null)
            {
                originalStream = OssUtils.SetupProgressListeners(originalStream, conf.ProgressUpdateInterval, client, callback);
                request.Content = originalStream;
            }

            // wrap input stream in MD5Stream
            if (conf.EnalbeMD5Check)
            {
                var hashStream = new MD5Stream(originalStream, null, streamLength);
                request.Content = hashStream;
                context.ResponseHandlers.Add(new MD5DigestCheckHandler(hashStream));
            }
            else if (conf.EnableCrcCheck && request.InitCrc != null)
            {
                var hashStream = new Crc64Stream(originalStream, null, streamLength, request.InitCrc.Value);
                request.Content = hashStream;
                context.ResponseHandlers.Add(new Crc64CheckHandler(hashStream));
            }

            return new AppendObjectCommand(client, endpoint, context,
                                           DeserializerFactory.GetFactory().CreateAppendObjectResultDeserializer(),
                                           request);
        }