问使用http POST登录到google

EN

var container = new CookieContainer();

var request = (HttpWebRequest)WebRequest.Create("https://example.com/login");
request.Method = "POST";
request.ContentType = "application/x-www-form-urlencoded";
request.CookieContainer = container;
using (var stream = request.GetRequestStream())
using (var writer = new StreamWriter(stream))
{
    var values = HttpUtility.ParseQueryString(string.Empty);
    values["password"] = "secret";
    values["username"] = "someuser";
    writer.Write(values.ToString());
}

using (var response = request.GetResponse())
{
    // At this stage if authentication went fine the 
    // cookie container should have the authentication cookie
    // allowing to track the user
}

// Now let's send a second request to download the file
request = (HttpWebRequest)WebRequest.Create("https://example.com/authenticated_resource");
request.CookieContainer = container;
request.Method = "GET";
using (var response = request.GetResponse())
using (var stream = response.GetResponseStream())
{
    // TODO: do something with the response
}