[游戏开发]C# 后台读取文件上传指定服务器（web方式）

 public string PostData(string url, int timeOut, string fileKeyName, string filePath)
        {
            string responseContent;
            var memStream = new MemoryStream();
            var webRequest = (HttpWebRequest)WebRequest.Create(url);
            // 边界符
            var boundary = "------------" + DateTime.Now.Ticks.ToString("x");
            // 编码边界符
            var firstBoundary = Encoding.ASCII.GetBytes("--" + boundary + "\r\n");//拼接第一个form表单值用到
            var encodingBoundary = Encoding.ASCII.GetBytes("\r\n--" + boundary + "\r\n");
            var endBoundary = Encoding.ASCII.GetBytes("\r\n--" + boundary + "--\r\n");
            //本地读取方式
            var fileStream = new FileStream(filePath, FileMode.Open, FileAccess.Read);
            // 设置属性
            webRequest.Method = "POST";
            webRequest.Timeout = timeOut;
            webRequest.ContentType = "multipart/form-data; boundary=" + boundary;
            //file表单值    filename的后缀会影响服务器保存的文件格式
            const string filePartHeader =
                    "Content-Disposition: form-data; name=\"{0}\"; filename=\"{1}\"\r\n" +
                     "Content-Type: application/octet-stream\r\n\r\n";
            var header = string.Format(filePartHeader, fileKeyName, "123.jpg");
            var headerbytes = Encoding.UTF8.GetBytes(header);

            memStream.Write(encodingBoundary, 0, encodingBoundary.Length);
            memStream.Write(headerbytes, 0, headerbytes.Length);

            var buffer = new byte[1024];
            int bytesRead; // =0
            while ((bytesRead = fileStream.Read(buffer, 0, buffer.Length)) != 0)
            {
                memStream.Write(buffer, 0, bytesRead);
            }
            // 写入最后的结束边界符
            memStream.Write(endBoundary, 0, endBoundary.Length);
            webRequest.ContentLength = memStream.Length;

            var requestStream = webRequest.GetRequestStream();

            memStream.Position = 0;
            var tempBuffer = new byte[memStream.Length];
            memStream.Read(tempBuffer, 0, tempBuffer.Length);
            memStream.Close();

            requestStream.Write(tempBuffer, 0, tempBuffer.Length);
            requestStream.Close();

            var httpWebResponse = (HttpWebResponse)webRequest.GetResponse();

            using (var httpStreamReader = GetWebContent(httpWebResponse))
            {
                responseContent = httpStreamReader.ReadToEnd();
            }

            fileStream.Close();
            httpWebResponse.Close();
            webRequest.Abort();
            return responseContent;
        }



/// <summary>
        /// 获取web请求后的返回值
        /// </summary>
        /// <param name="response"></param>
        /// <returns></returns>
        public static StreamReader GetWebContent(HttpWebResponse response)
        {
            Stream desStream;
            if (response.ContentEncoding == "gzip")
            {
                desStream = new System.IO.Compression.GZipStream(response.GetResponseStream(), System.IO.Compression.CompressionMode.Decompress);
            }
            else
            {
                desStream = response.GetResponseStream();
            }
            string strcs = response.CharacterSet;
            StreamReader xmlStream;
            if (strcs == "")
            {
                xmlStream = new System.IO.StreamReader(desStream, System.Text.Encoding.Default);
            }
            else
            {
                strcs = strcs.Trim().ToLower();
                switch (strcs)
                {
                    case "gb2312":
                        xmlStream = new System.IO.StreamReader(desStream, System.Text.Encoding.GetEncoding("gb2312"));
                        break;
                    case "utf-8":
                        xmlStream = new System.IO.StreamReader(desStream, System.Text.Encoding.UTF8);
                        break;
                    default:
                        xmlStream = new System.IO.StreamReader(desStream, System.Text.Encoding.Default);
                        break;
                }
            }
            return xmlStream;
        }
        public bool IsReusable
        {
            get
            {
                return false;
            }
        }

调用方法：?

//上传文件到文件服务器
string resultData = PostData(fileUpLoadURL, 1000000, "File", filePath + fileName);

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