我正在使用WebClient / WebRequest访问网站上的受限数据.该网站没有官方的API,所以我想要做的只是填写
HTML表单并将值发布到服务器,以便我登录.
我试过this和this,但看起来不像即将到来的请求被登录.
后一个例子更具吸引力,因为我显然更喜欢WebClient,但遗留的WebRequest将会做.
无论如何,在第一个例子中,我认为它已经登录,但访问私有数据的即将到来的请求返回一个包含消息“这只是成员内容”的页面.
如何使WebClient永久登录？
解决方法
这是我做的,它的作品(
credit).
先添加这个类：
namespace System.Net
{
using System.Text;
using System.Collections.Specialized;
public class CookieAwareWebClient : WebClient
{
public void Login(string loginPageAddress,NameValueCollection loginData)
{
CookieContainer container;
var request = (HttpWebRequest)WebRequest.Create(loginPageAddress);
request.Method = "POST";
request.ContentType = "application/x-www-form-urlencoded";
var buffer = Encoding.ASCII.GetBytes(loginData.ToString());
request.ContentLength = buffer.Length;
var requestStream = request.GetRequestStream();
requestStream.Write(buffer,buffer.Length);
requestStream.Close();
container = request.CookieContainer = new CookieContainer();
var response = request.GetResponse();
response.Close();
CookieContainer = container;
}
public CookieAwareWebClient(CookieContainer container)
{
CookieContainer = container;
}
public CookieAwareWebClient()
: this(new CookieContainer())
{ }
public CookieContainer CookieContainer { get; private set; }
protected override WebRequest GetWebRequest(Uri address)
{
var request = (HttpWebRequest)base.GetWebRequest(address);
request.CookieContainer = CookieContainer;
return request;
}
}
}
用法：
public static void Main()
{
var loginAddress = "www.mywebsite.com/login";
var loginData = new NameValueCollection
{
{ "username","shimmy" },{ "password","mypassword" }
};
var client = new CookieAwareWebClient();
client.Login(loginAddress,loginData);
}
