c# HttpWebRequest https的一些处理

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 = 1000 * 30)
{
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 > 0)
{
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