/// <summary> /// 发送到指定的URL的请求 /// </summary> /// <param name="url">请求的URL</param> /// <param name="postData">要发送的数据</param> /// <param name="requestType">请求类型 POST GET</param> /// <param name="contentType">请求的内容类型。默认值是'application/x-www-form-urlencoded'.</param> /// <param name="userAgent">请求 UserAgent</param> /// <param name="keepAlive">KeepAlive true/false</param> /// <param name="credentials">使用的凭据</param> /// <param name="proxy">使用代理</param> /// <param name="timeout">超时</param> /// <param name="encoding">设置响应编码</param> /// <param name="postDataEncoding">设置POST数据编码</param> /// <returns>返回请求的数据</returns> public static string SendRequest(string url, string postData, string requestType, string contentType, string userAgent, bool?keepAlive, ICredentials credentials, IWebProxy proxy, int?timeout, Encoding encoding, Encoding postDataEncoding, WebHeaderCollection webHeaderCollection = null) { if (!String.IsNullOrEmpty(url)) { HttpWebRequest webReq; HttpWebResponse webResp = null; if (postDataEncoding == null) { postDataEncoding = Encoding.UTF8; } try { webReq = (HttpWebRequest)WebRequest.Create(url); webReq.Method = requestType; if (webHeaderCollection.IsNotNull()) { webReq.Headers = webHeaderCollection; } if (credentials.IsNotNull()) { webReq.Credentials = credentials; } if (proxy.IsNotNull()) { webReq.Proxy = proxy; } if (timeout.IsNotNull()) { webReq.Timeout = (int)timeout; } webReq.ServicePoint.Expect100Continue = false; //webReq.PreAuthenticate = true; //webReq.AllowWriteStreamBuffering = true; webReq.ContentType = !String.IsNullOrEmpty(contentType) ? contentType : "text/xml"; // "application/x-www-form-urlencoded"; if (!String.IsNullOrEmpty(userAgent)) { webReq.UserAgent = userAgent; } if (keepAlive.IsNotNull()) { webReq.KeepAlive = (bool)keepAlive; } byte[] data = !String.IsNullOrEmpty(postData) ? postDataEncoding.GetBytes(postData) : postDataEncoding.GetBytes(String.Empty); webReq.ContentLength = data.Length; if (requestType.ToUpper() != "GET") { Stream writer = webReq.GetRequestStream(); writer.Write(data, 0, data.Length); writer.Close(); } webResp = (HttpWebResponse)webReq.GetResponse(); string response; using (var receiveStream = webResp.GetResponseStream()) { using (var readStream = new StreamReader(receiveStream, encoding)) response = readStream.ReadToEnd(); } return(response); } finally { if (webResp.IsNotNull()) { webResp.Close(); } } } throw new Exception("必须指定一个有效的URL。"); }