/// <summary> /// 执行带文件上传的HTTP POST请求。 /// </summary> /// <param name="url">请求地址</param> /// <param name="textParams">请求文本参数</param> /// <param name="fileParams">请求文件参数</param> /// <returns>HTTP响应</returns> public static string DoPost(string url, IDictionary <string, string> textParams, IDictionary <string, FileItem> fileParams) { // 如果没有文件参数,则走普通POST请求 if (fileParams == null || fileParams.Count == 0) { return(DoPost(url, textParams)); } string boundary = DateTime.Now.Ticks.ToString("X"); // 随机分隔线 HttpWebRequest req = (HttpWebRequest)WebRequest.Create(url); req.Method = "POST"; req.KeepAlive = true; req.UserAgent = "Top4Net"; req.ContentType = "multipart/form-data;charset=utf-8;boundary=" + boundary; Stream reqStream = req.GetRequestStream(); byte[] itemBoundaryBytes = Encoding.UTF8.GetBytes("\r\n--" + boundary + "\r\n"); byte[] endBoundaryBytes = Encoding.UTF8.GetBytes("\r\n--" + boundary + "--\r\n"); // 组装文本请求参数 string textTemplate = "Content-Disposition:form-data;name=\"{0}\"\r\nContent-Type:text/plain\r\n\r\n{1}"; IEnumerator <KeyValuePair <string, string> > textEnum = textParams.GetEnumerator(); while (textEnum.MoveNext()) { string textEntry = string.Format(textTemplate, textEnum.Current.Key, textEnum.Current.Value); byte[] itemBytes = Encoding.UTF8.GetBytes(textEntry); reqStream.Write(itemBoundaryBytes, 0, itemBoundaryBytes.Length); reqStream.Write(itemBytes, 0, itemBytes.Length); } // 组装文件请求参数 string fileTemplate = "Content-Disposition:form-data;name=\"{0}\";filename=\"{1}\"\r\nContent-Type:{2}\r\n\r\n"; IEnumerator <KeyValuePair <string, FileItem> > fileEnum = fileParams.GetEnumerator(); while (fileEnum.MoveNext()) { string key = fileEnum.Current.Key; FileItem fileItem = fileEnum.Current.Value; string fileEntry = string.Format(fileTemplate, key, fileItem.GetFileName(), fileItem.GetMimeType()); byte[] itemBytes = Encoding.UTF8.GetBytes(fileEntry); reqStream.Write(itemBoundaryBytes, 0, itemBoundaryBytes.Length); reqStream.Write(itemBytes, 0, itemBytes.Length); byte[] fileBytes = fileItem.GetContent(); reqStream.Write(fileBytes, 0, fileBytes.Length); } reqStream.Write(endBoundaryBytes, 0, endBoundaryBytes.Length); reqStream.Close(); HttpWebResponse rsp = (HttpWebResponse)req.GetResponse(); Encoding encoding = Encoding.GetEncoding(rsp.CharacterSet); return(GetResponseAsString(rsp, encoding)); }
/// <summary> /// 执行带文件上传的HTTP POST请求。 /// </summary> /// <param name="url">请求地址</param> /// <param name="textParams">请求文本参数</param> /// <param name="fileParams">请求文件参数</param> /// <param name="headerParams">请求头部参数</param> /// <returns>HTTP响应</returns> public string DoPost(string url, IDictionary <string, string> textParams, IDictionary <string, FileItem> fileParams, IDictionary <string, string> headerParams) { // 如果没有文件参数,则走普通POST请求 if (fileParams == null || fileParams.Count == 0) { return(DoPost(url, textParams, headerParams)); } string boundary = DateTime.Now.Ticks.ToString("X"); // 随机分隔线 HttpWebRequest req = GetWebRequest(url, "POST", headerParams); req.ContentType = "multipart/form-data;charset=utf-8;boundary=" + boundary; System.IO.Stream reqStream = req.GetRequestStream(); byte[] itemBoundaryBytes = Encoding.UTF8.GetBytes("\r\n--" + boundary + "\r\n"); byte[] endBoundaryBytes = Encoding.UTF8.GetBytes("\r\n--" + boundary + "--\r\n"); if (textParams != null) { // 组装文本请求参数 string textTemplate = "Content-Disposition:form-data;name=\"{0}\"\r\nContent-Type:text/plain\r\n\r\n{1}"; foreach (KeyValuePair <string, string> kv in textParams) { string textEntry = string.Format(textTemplate, kv.Key, kv.Value); byte[] itemBytes = Encoding.UTF8.GetBytes(textEntry); reqStream.Write(itemBoundaryBytes, 0, itemBoundaryBytes.Length); reqStream.Write(itemBytes, 0, itemBytes.Length); } } // 组装文件请求参数 string fileTemplate = "Content-Disposition:form-data;name=\"{0}\";filename=\"{1}\"\r\nContent-Type:{2}\r\n\r\n"; foreach (KeyValuePair <string, FileItem> kv in fileParams) { string key = kv.Key; FileItem fileItem = kv.Value; if (!fileItem.IsValid()) { throw new ArgumentException("FileItem is invalid"); } string fileEntry = string.Format(fileTemplate, key, fileItem.GetFileName(), fileItem.GetMimeType()); byte[] itemBytes = Encoding.UTF8.GetBytes(fileEntry); reqStream.Write(itemBoundaryBytes, 0, itemBoundaryBytes.Length); reqStream.Write(itemBytes, 0, itemBytes.Length); fileItem.Write(reqStream); } reqStream.Write(endBoundaryBytes, 0, endBoundaryBytes.Length); reqStream.Close(); HttpWebResponse rsp = (HttpWebResponse)req.GetResponse(); Encoding encoding = GetResponseEncoding(rsp); return(GetResponseAsString(rsp, encoding)); }