/// <summary>    /// http连接基础类，负责底层的http通信    /// </summary>    public class HttpService    {        public static bool CheckValidationResult(object sender, X509Certificate certificate, X509Chain chain, SslPolicyErrors errors)        {            //直接确认，否则打不开                return true;        }        public static string Post(string xml, string url, int timeout)        {            System.GC.Collect();//垃圾回收，回收没有正常关闭的http连接            string result = "";//返回结果            HttpWebRequest request = null;            HttpWebResponse response = null;            Stream reqStream = null;            try            {                //设置最大连接数                ServicePointManager.DefaultConnectionLimit = 200;                //设置https验证方式                if (url.StartsWith("https", StringComparison.OrdinalIgnoreCase))                {                    ServicePointManager.ServerCertificateValidationCallback =                            new RemoteCertificateValidationCallback(CheckValidationResult);                }                /***************************************************************                * 下面设置HttpWebRequest的相关属性                * ************************************************************/                request = (HttpWebRequest)WebRequest.Create(url);                request.Method = "POST";                request.Timeout = timeout * 1000;                //设置代理服务器                //WebProxy proxy = new WebProxy();                          //定义一个网关对象                //proxy.Address = new Uri(WxPayConfig.PROXY_URL);              //网关服务器端口:端口                //request.Proxy = proxy;                //设置POST的数据类型和长度                request.ContentType = "application/json";                byte[] data = http://www.mamicode.com/System.Text.Encoding.UTF8.GetBytes(xml);"HttpService,"+ "Thread - caught ThreadAbortException - resetting.");                WriteErrorLog.WriteLogWeb("Exception message: {0}"+ e.Message);                System.Threading.Thread.ResetAbort();            }            catch (WebException e)            {                WriteErrorLog.WriteLogWeb("HttpService,"+ e.ToString());                if (e.Status == WebExceptionStatus.ProtocolError)                {                    WriteErrorLog.WriteLogWeb("HttpService,"+ "StatusCode : " + ((HttpWebResponse)e.Response).StatusCode);                    WriteErrorLog.WriteLogWeb("HttpService,"+ "StatusDescription : " + ((HttpWebResponse)e.Response).StatusDescription);                }                throw e;            }            catch (Exception e)            {                WriteErrorLog.WriteLogWeb("HttpService,"+ e.ToString());                throw e;            }            finally            {                //关闭连接和流                if (response != null)                {                    response.Close();                }                if (request != null)                {                    request.Abort();                }            }            return result;        }        /// <summary>        /// 处理http GET请求，返回数据        /// </summary>        /// <param name="url">请求的url地址</param>        /// <returns>http GET成功后返回的数据，失败抛WebException异常</returns>        public static string Get(string url)        {            System.GC.Collect();            string result = "";            WriteErrorLog.WriteLogWeb("HttpService Get 请求地址："+ url);            HttpWebRequest request = null;            HttpWebResponse response = null;            //请求url以获取数据            try            {                //设置最大连接数                ServicePointManager.DefaultConnectionLimit = 200;                //设置https验证方式                if (url.StartsWith("https", StringComparison.OrdinalIgnoreCase))                {                    ServicePointManager.ServerCertificateValidationCallback =                            new RemoteCertificateValidationCallback(CheckValidationResult);                }                /***************************************************************                * 下面设置HttpWebRequest的相关属性                * ************************************************************/                request = (HttpWebRequest)WebRequest.Create(url);                request.Method = "GET";                //设置代理                //WebProxy proxy = new WebProxy();                //proxy.Address = new Uri(WxPayConfig.PROXY_URL);                //request.Proxy = proxy;                //获取服务器返回                response = (HttpWebResponse)request.GetResponse();                //获取HTTP返回数据                StreamReader sr = new StreamReader(response.GetResponseStream(), Encoding.UTF8);                result = sr.ReadToEnd().Trim();                sr.Close();            }            catch (System.Threading.ThreadAbortException e)            {                WriteErrorLog.WriteLogWeb("HttpService"+ ",Thread - caught ThreadAbortException - resetting.");                WriteErrorLog.WriteLogWeb("Exception message: {0}"+ e.Message);                System.Threading.Thread.ResetAbort();            }            catch (WebException e)            {                WriteErrorLog.WriteLogWeb("HttpService"+ e.ToString());                if (e.Status == WebExceptionStatus.ProtocolError)                {                    WriteErrorLog.WriteLogWeb("HttpService"+",StatusCode : " + ((HttpWebResponse)e.Response).StatusCode);                    WriteErrorLog.WriteLogWeb("HttpService"+ ",StatusDescription : " + ((HttpWebResponse)e.Response).StatusDescription);                }                throw e;            }            catch (Exception e)            {                WriteErrorLog.WriteLogWeb("HttpService,"+ e.ToString());                throw e;            }            finally            {                //关闭连接和流                if (response != null)                {                    response.Close();                }                if (request != null)                {                    request.Abort();                }            }            return result;        }    }