问题描述
我使用此代码登录:
CookieCollection cookies = new CookieCollection();
HttpWebRequest request = (HttpWebRequest)WebRequest.Create("example.com");
request.CookieContainer = new CookieContainer();
request.CookieContainer.Add(cookies);
HttpWebResponse response = (HttpWebResponse)request.GetResponse();
cookies = response.Cookies;
string getUrl = "example.com";
string postData = String.Format("my parameters");
HttpWebRequest getRequest = (HttpWebRequest)WebRequest.Create(getUrl);
getRequest.CookieContainer = new CookieContainer();
getRequest.CookieContainer.Add(cookies);
getRequest.Method = WebRequestMethods.Http.Post;
getRequest.UserAgent = "Mozilla/5.0 (Windows NT 6.2; WOW64; rv:19.0) Gecko/20100101 Firefox/19.0";
getRequest.AllowWriteStreamBuffering = true;
getRequest.ProtocolVersion = HttpVersion.Version11;
getRequest.AllowAutoRedirect = true;
getRequest.ContentType = "application/x-www-form-urlencoded";
byte[] byteArray = Encoding.ASCII.GetBytes(postData);
getRequest.ContentLength = byteArray.Length;
Stream newStream = getRequest.GetRequestStream();
newStream.Write(byteArray, 0, byteArray.Length);
newStream.Close();
HttpWebResponse getResponse = (HttpWebResponse)getRequest.GetResponse();
using (StreamReader sr = new StreamReader(getResponse.GetResponseStream(), Encoding.GetEncoding("windows-1251")))
{
doc.LoadHtml(sr.ReadToEnd());
webBrowser1.DocumentText = doc.DocumentNode.OuterHtml;
}
然后我想使用HtmlWeb(HtmlAgilityPack)或Webclient来解析HTML HtmlDocument(HtmlAgilityPack)。
then I want to use HtmlWeb (HtmlAgilityPack) or Webclient to parse the HTML to HtmlDocument(HtmlAgilityPack).
我的问题是,当我使用:
My problem is that when I use:
WebClient wc = new WebClient();
webBrowser1.DocumentText = wc.DownloadString(site);
或
doc = web.Load(site);
webBrowser1.DocumentText = doc.DocumentNode.OuterHtml;
登录消失,所以我想我必须以某种方式通过cookies ..任何建议?
The login disappear so i think I must somehow pass the cookies.. Any suggestions?
推荐答案
检查
这里是您正在寻找的示例(语法不是100%测试,我只是修改了一些我通常使用的类):
Here is an example of what you're looking for (syntax not 100% tested, I just modified some class I usually use):
public class MyWebClient
{
//The cookies will be here.
private CookieContainer _cookies = new CookieContainer();
//In case you need to clear the cookies
public void ClearCookies() {
_cookies = new CookieContainer();
}
public HtmlDocument GetPage(string url) {
HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);
request.Method = "GET";
//Set more parameters here...
//...
//This is the important part.
request.CookieContainer = _cookies;
HttpWebResponse response = (HttpWebResponse)request.GetResponse();
var stream = response.GetResponseStream();
//When you get the response from the website, the cookies will be stored
//automatically in "_cookies".
using (var reader = new StreamReader(stream)) {
string html = reader.ReadToEnd();
var doc = new HtmlDocument();
doc.LoadHtml(html);
return doc;
}
}
}
:
var client = new MyWebClient();
HtmlDocument doc = client.GetPage("http://somepage.com");
//This request will be sent with the cookies obtained from the page
doc = client.GetPage("http://somepage.com/another-page");
注意:如果您还想使用 POST
方法,只需使用 POST
逻辑创建类似于 GetPage
的方法,重构类等。
Note: If you also want to use POST
method, just create a method similar to GetPage
with the POST
logic, refactor the class, etc.
这篇关于如何将Cookie传递到HtmlAgilityPack或WebClient?的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持!