使用httprequest自动登录https网站，始终返回的是登录页面，有高手能看下么

笑容天下事 2015-03-17 05:34:36

string html = "";
HttpWebResponse response = null;
this.RequestUri = new Uri(url);
HttpWebRequest request = WebRequest.Create(this.RequestUri) as HttpWebRequest;
try
{

if (url.StartsWith("https", StringComparison.OrdinalIgnoreCase))
{
ServicePointManager.ServerCertificateValidationCallback = new RemoteCertificateValidationCallback(CheckValidationResult);
request = WebRequest.Create(url) as HttpWebRequest;
}
else
{
request = WebRequest.Create(url) as HttpWebRequest;
}

request.Method = "POST";
request.UserAgent = "Mozilla/5.0 (Windows NT 6.1; WOW64; rv:36.0) Gecko/20100101 Firefox/36.0";
request.Host = "www.amazon.com";
request.Accept = "text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8";
request.KeepAlive = true;
request.Headers["Accept-Language"] = "zh-cn,zh;q=0.8,en-us;q=0.5,en;q=0.3";
request.ContentType = "application/x-www-form-urlencoded";
request.Headers["Accept-Language"] = "gzip, deflate";

request.Referer = "https://www.amazon.com/ap/signin?_encoding=UTF8&openid.assoc_handle=usflex&openid.claimed_id=http%3A%2F%2Fspecs.openid.net%2Fauth%2F2.0%2Fidentifier_select&openid.identity=http%3A%2F%2Fspecs.openid.net%2Fauth%2F2.0%2Fidentifier_select&openid.mode=checkid_setup&openid.ns=http%3A%2F%2Fspecs.openid.net%2Fauth%2F2.0&openid.ns.pape=http%3A%2F%2Fspecs.openid.net%2Fextensions%2Fpape%2F1.0&openid.pape.max_auth_age=0&openid.return_to=https%3A%2F%2Fwww.amazon.com%2Fgp%2Fyourstore%2Fhome%3Fie%3DUTF8%26action%3Dsign-out%26path%3D%252Fgp%252Fyourstore%252Fhome%26ref_%3Dnav_youraccount_signout%26signIn%3D1%26useRedirectOnSuccess%3D1";

string postData = "appActionToken=6j2Bf3fAi9L1j0dnAP1oI58HktaxUj3D&appAction=SIGNIN&openid.pape.max_auth_age=ape%3AMA%3D%3D&openid.ns=ape%3AaHR0cDovL3NwZWNzLm9wZW5pZC5uZXQvYXV0aC8yLjA%3D&openid.ns.pape=ape%3AaHR0cDovL3NwZWNzLm9wZW5pZC5uZXQvZXh0ZW5zaW9ucy9wYXBlLzEuMA%3D%3D&prevRID=ape%3AMEdQNzBSMk1ZRThWRkUxN1ZXWjc%3D&pageId=ape%3AdXNmbGV4&openid.identity=ape%3AaHR0cDovL3NwZWNzLm9wZW5pZC5uZXQvYXV0aC8yLjAvaWRlbnRpZmllcl9zZWxlY3Q%3D&openid.claimed_id=ape%3AaHR0cDovL3NwZWNzLm9wZW5pZC5uZXQvYXV0aC8yLjAvaWRlbnRpZmllcl9zZWxlY3Q%3D&openid.mode=ape%3AY2hlY2tpZF9zZXR1cA%3D%3D&openid.assoc_handle=ape%3AdXNmbGV4&openid.return_to=ape%3AaHR0cHM6Ly93d3cuYW1hem9uLmNvbS9ncC95b3Vyc3RvcmUvaG9tZT9pZT1VVEY4JnJlZl89bmF2X3lhX3NpZ25pbg%3D%3D&email=yhyinhu@163.com&create=0&password=yh91011023&metadata1=EPdH9iurGItrD1w6AJhpX9gIJdbrc0qynuTiUDlDELuX4HcwRYsi%2BQwXOIrEONQdfE9ByIMdf84wqIP3Oh%2FPKUMQKFSTf0%2FqYHm1xB4JHWOAh%2B%2Fm%2FTvG52yi6yDgld2R6oymdegOosADGruRsHR7MMAWEaakUVRZDjA8wctbIMUZU6tKTQCqgWHxo9AH%2F3d6u3Tz86Wi5hY6T4v1X2cR7xpJqLCPbaIGhDBDcKFlOEBP0Nm8DVxb2zUM%2FK7XWc%2Fx5yLJMaXztRSQcJRrm3yOzW0B%2By5TgnJljadRNOmnktwBjQhwduDCB%2BisGHVr1E8A3BXNb3gPFamVOtJAEgEt8jhpYiZMCKOmEPU3sKNXfSvkG3LUrjmKZP01UzbQq1zA6uyBCs9MyQ6y8VJwhE8ae2orM%2BbYIDGF%2FXkZfDqp%2Fo9z2w%2FdrE4x%2BVn0RYbGPIJLn%2FRrXCMKiz07OrvpnAay4djcPAx31vZaT2g6nrciecgXFxQadIwAyfGulaZP50PtwhAFkr76XVZB3DhZyv%2ByBDioHiFxiMJ8E3ceABary1drPIehK8QsPISLJ0cDSHvgdJnixlHRxQEUrgpl4a3PPxszgPhgdqgjDwiJ737Ah74TusKL%2B56mc%2Bra6WroBJ9sBuT2BbnOi8fLX0SniggLZRmR2X40xWA8WWvDQrTnnZC1K1s1mxBSRSSyATy%2FoBJoRS%2FqGfxy%2FTZUUWWF4A0D7IWX3Yu16TwhObRn4wVRbLdVi3d%2BWDlydCE1k%2BqGK%2FXZ01aQ1Jdhtu5aPZx%2B0lqcVzMOPEkcbAuZM49mmK695KFt55vlu%2FLs7mM3mQJ6sWdJtYWA7LhhScK84mUaJjC6aA2f7JoUCGAFzF52x6CtE%2F3cMMKY0CGXdu00SRGpCT2vnEaBDeJ6%2Fms4ihiRCPA36odmgu4BvbhnOqXler55RUggEY58nD9OtCGlTvdB7Gk6Vji4Xmgc8wA%3D";

Encoding myEncoding = Encoding.UTF8;
//myEncoding = Encoding.Unicode;
//myEncoding = Encoding.ASCII;
//myEncoding = Encoding.Default;

byte[] byteArray = myEncoding.GetBytes(strPostData.ToString().TrimEnd('&'));

byte[] buffer = myEncoding.GetBytes(postData);
int aa = buffer.Length;

request.ContentLength = buffer.Length;
request.GetRequestStream().Write(buffer, 0, buffer.Length);

HttpWebResponse wresp = (HttpWebResponse)request.GetResponse();
response = (HttpWebResponse)request.GetResponse();

string strHtml = "";
string charset = response.CharacterSet;
Encoding ee = Encoding.UTF8;
try
{
if (charset.Length > 0 && !charset.Contains("ISO"))
ee = Encoding.GetEncoding(charset);
}
catch
{
ee = Encoding.Default;
}
if (response.ContentEncoding.ToLower().Contains("gzip"))
{
using (GZipStream stream = new GZipStream(response.GetResponseStream(), CompressionMode.Decompress))
{

using (StreamReader reader = new StreamReader(stream, ee))
{

strHtml = reader.ReadToEnd();
}
}
}
else if (response.ContentEncoding.ToLower().Contains("deflate"))
{
using (DeflateStream stream = new DeflateStream(response.GetResponseStream(), CompressionMode.Decompress))
{
using (StreamReader reader = new StreamReader(stream, ee))
{

strHtml = reader.ReadToEnd();
}

}
}
else
{
using (Stream stream = response.GetResponseStream())
{
using (StreamReader reader = new StreamReader(stream, ee))
{

strHtml = reader.ReadToEnd();
}
}
}

return strHtml;
}
catch (Exception he)
{
string h = he.Message;
return "";
}

以上postdata参数是使用httpwatch获得的，为什么返回标识符是200（OK），取得的html代码是登录页面，
是因为每次重新登录以后的参数都要重新读取么？
而且返回的header头中没有local重定向，应该是登录不成功的

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