c# HttpWebRequest https的一些处理

先看下请求方法

   public string Get_Request(
             string strUrl,
             CookieContainer _cookie = null,
             string strHost = "",
             string strRefer = "",
             string strOrigin = "",
             bool blnHttps = false,
             Dictionary<string, string> lstHeads = null,
             bool blnKeepAlive=false,
             string strEncoding = "utf-8",
             string strContentType = "",
             string strCertFile="",
             string strAccept = "text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8",
             string strUserAgent = "Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/45.0.2454.101 Safari/537.36",
             bool blnAllowAutoRedirect = true,
             int intTimeout =  * )
         {
             HttpWebRequest request;
             HttpWebResponse response;
             request = (HttpWebRequest)WebRequest.Create(strUrl);
             if (blnHttps)
             {
                 ServicePointManager.ServerCertificateValidationCallback = new RemoteCertificateValidationCallback(CheckValidationResult);
                 request.ProtocolVersion = HttpVersion.Version10;

                 ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls12;

             }
             request.KeepAlive = blnKeepAlive;
             request.Accept = strAccept;
             request.Timeout = intTimeout;
             request.Method = "GET";
             request.Credentials = CredentialCache.DefaultCredentials;
             request.UserAgent = strUserAgent;
             request.AllowAutoRedirect = blnAllowAutoRedirect;
             request.Proxy = null;
             if (!string.IsNullOrEmpty(strContentType))
             {
                 request.ContentType = strContentType;
             }
             if (_cookie != null)
             {
                 request.CookieContainer = _cookie;
             }
             if (!string.IsNullOrEmpty(strHost))
             {
                 request.Host = strHost;
             }
             if (!string.IsNullOrEmpty(strRefer))
             {
                 request.Referer = strRefer;
             }
             if (!string.IsNullOrEmpty(strOrigin))
             {
                 request.Headers.Add("Origin", strOrigin);
             }
             if (lstHeads != null && lstHeads.Count > )
             {
                 foreach (var item in lstHeads)
                 {
                     request.Headers.Add(item.Key, item.Value);
                 }
             }
             response = (HttpWebResponse)request.GetResponse();
             var sr = new StreamReader(response.GetResponseStream(), Encoding.GetEncoding(strEncoding));
             string strResult = sr.ReadToEnd();
             sr.Close();
             request.Abort();
             response.Close();
             return strResult;

         }
         private static bool CheckValidationResult(object sender, X509Certificate certificate, X509Chain chain, SslPolicyErrors errors)
         {
             return true; //总是接受
         }  

if (blnHttps)内的代码就是针对https所做的处理

需要注意的是

1、当使用https请求的时候需要确定加密协议是哪个，这个可以通过火狐查看到，如下图

2、只有Framework4.5及以上才支持1.1和1.2协议

如果仍有什么不明白的地方请留言吧