HttpWebRequest POST

Question

HttpWebRequest POST上传文件问题，文件能正确上传到服务器，但为什么服务器不回应（已经确定服务器正常是能回应的），调试程序为什么一直卡在request.GetResponse() 不动？

        /// 

        /// 上传文件请求
        /// 
        /// <param name="url">Url</param>
        /// <param name="filePath">文件路径</param>
        /// <param name="formDatas">表单数据（字典格式）</param>
        public string UploadRequest(string url, string filePath, Dictionary<string, string> formDatas)
        {
            // 时间戳，用做boundary
            string timeStamp = DateTime.Now.Ticks.ToString("x");

            //根据uri创建HttpWebRequest对象
            HttpWebRequest request = (HttpWebRequest)WebRequest.Create(new Uri(url));
            request.Method = "POST";
            request.AllowWriteStreamBuffering = false; //对发送的数据不使用缓存
            request.Timeout = 10000; //设置获得响应的超时时间（10秒）
            request.ContentType = "multipart/form-data; boundary=" + timeStamp;

            //表单信息
            string boundary = "--" + timeStamp;
            string form = "";
            string formFormat = boundary + "\r\nContent-Disposition: form-data; name=\"{0}\"\r\n\r\n{1}\r\n";
            string formEnd = boundary + "\r\nContent-Disposition: form-data; name=\"{0}\"; filename=\"{1}\";\r\nContent-Type:application/octet-stream\r\n\r\n";
            foreach (var pair in formDatas)
            {
                form += string.Format(formFormat, pair.Key, pair.Value);
            }
            form += string.Format(formEnd, "file", Path.GetFileName(filePath));
            byte[] postHeaderBytes = Encoding.UTF8.GetBytes(form);

            //读取file文件
            FileStream fileStream = new FileStream(filePath, FileMode.Open, FileAccess.Read);
            BinaryReader binaryReader = new BinaryReader(fileStream);
            byte[] fileArray = binaryReader.ReadBytes((int)fileStream.Length);

            //结束边界
            byte[] boundaryBytes = Encoding.UTF8.GetBytes("\r\n--" + timeStamp + "--\r\n");
            long length = postHeaderBytes.Length + fileStream.Length + boundaryBytes.Length;
            request.ContentLength = length; //请求内容长度

            //返回信息
            string result = "";
            try
            {
                Stream postStream = request.GetRequestStream();

                //发送请求头部消息
                postStream.Write(postHeaderBytes, 0, postHeaderBytes.Length);

                //文件内容
                postStream.Write(fileArray, 0, fileArray.Length);

                //添加尾部边界
                postStream.Write(boundaryBytes, 0, boundaryBytes.Length);
                postStream.Close();

                //获取响应内容
                HttpWebResponse response = request.GetResponse() as HttpWebResponse;
                Stream responseStream = response.GetResponseStream();
                using (StreamReader reader = new StreamReader(responseStream, Encoding.GetEncoding("UTF-8")))
                {
                    result = reader.ReadToEnd();
                }
                response.Close();
                responseStream.Close();
                return result;
            }
            catch (Exception ex)
            {
                return ex.Message;
            }
            finally
            {
                fileStream.Close();
                binaryReader.Close();
            }

        }

Answer 1

https://blog.csdn.net/xdfuxiabin/article/details/84069079
你参考下。