public static string UploadToServer(HttpPostedFile file, Const.ImgFunc func) { UploadParameterType p = new UploadParameterType(); p.Url = Util.GetAppSetting("UploadUrlPrefix") + "/api/img"; //p.Url = "http://localhost:17942/upload/uploadpicture"; p.UploadStream = file.InputStream; p.FileNameValue = file.FileName; p.PostParameters.Add("func", ((int)func).ToString()); return(Execute(p)); }
public static string Execute(UploadParameterType parameter) { using (MemoryStream memoryStream = new MemoryStream()) { // 1.分界线 string boundary = string.Format("----{0}", DateTime.Now.Ticks.ToString("x")), // 分界线可以自定义参数 beginBoundary = string.Format("--{0}\r\n", boundary), endBoundary = string.Format("\r\n--{0}--\r\n", boundary); byte[] beginBoundaryBytes = parameter.Encoding.GetBytes(beginBoundary), endBoundaryBytes = parameter.Encoding.GetBytes(endBoundary); // 2.组装开始分界线数据体 到内存流中 memoryStream.Write(beginBoundaryBytes, 0, beginBoundaryBytes.Length); // 3.组装 上传文件附加携带的参数 到内存流中 if (parameter.PostParameters != null && parameter.PostParameters.Count > 0) { foreach (KeyValuePair <string, string> keyValuePair in parameter.PostParameters) { string parameterHeaderTemplate = string.Format("Content-Disposition: form-data; name=\"{0}\"\r\n\r\n{1}\r\n{2}", keyValuePair.Key, keyValuePair.Value, beginBoundary); byte[] parameterHeaderBytes = parameter.Encoding.GetBytes(parameterHeaderTemplate); memoryStream.Write(parameterHeaderBytes, 0, parameterHeaderBytes.Length); } } // 4.组装文件头数据体 到内存流中 string fileHeaderTemplate = string.Format("Content-Disposition: form-data; name=\"{0}\"; filename=\"{1}\"\r\nContent-Type: application/octet-stream\r\n\r\n", parameter.FileNameKey, parameter.FileNameValue); byte[] fileHeaderBytes = parameter.Encoding.GetBytes(fileHeaderTemplate); memoryStream.Write(fileHeaderBytes, 0, fileHeaderBytes.Length); // 5.组装文件流 到内存流中 byte[] buffer = new byte[1024 * 1024 * 1]; int size = parameter.UploadStream.Read(buffer, 0, buffer.Length); while (size > 0) { memoryStream.Write(buffer, 0, size); size = parameter.UploadStream.Read(buffer, 0, buffer.Length); } // 6.组装结束分界线数据体 到内存流中 memoryStream.Write(endBoundaryBytes, 0, endBoundaryBytes.Length); // 7.获取二进制数据 byte[] postBytes = memoryStream.ToArray(); // 8.HttpWebRequest 组装 HttpWebRequest webRequest = (HttpWebRequest)WebRequest.Create(new Uri(parameter.Url, UriKind.RelativeOrAbsolute)); webRequest.Method = "POST"; webRequest.Timeout = 10000; webRequest.ContentType = string.Format("multipart/form-data; boundary={0}", boundary); webRequest.ContentLength = postBytes.Length; // 9.写入上传请求数据 using (Stream requestStream = webRequest.GetRequestStream()) { requestStream.Write(postBytes, 0, postBytes.Length); requestStream.Close(); } // 10.获取响应 using (HttpWebResponse webResponse = (HttpWebResponse)webRequest.GetResponse()) { using (StreamReader reader = new StreamReader(webResponse.GetResponseStream(), parameter.Encoding)) { string body = reader.ReadToEnd(); reader.Close(); return(body); } } } }