采集之cookie登陆

记录下来备忘

1
Code
public static string PostData(string url,string indata,CookieContainer myCookieContainer)
 2        {
 3            string outdata=""; 
 4            HttpWebRequest myHttpWebRequest=(HttpWebRequest)WebRequest.Create(url); 
 5            myHttpWebRequest.ContentType="application/x-www-form-urlencoded"; 
 6            myHttpWebRequest.ContentLength=indata.Length; 
 7            myHttpWebRequest.Method="POST"; 
 8            myHttpWebRequest.CookieContainer=myCookieContainer; 
 9            Stream myRequestStream=myHttpWebRequest.GetRequestStream(); 
10            StreamWriter myStreamWriter=new StreamWriter(myRequestStream,Encoding.GetEncoding("gb2312"));                 
11            myStreamWriter.Write(indata); 
12            myStreamWriter.Close(); 
13            myRequestStream.Close(); 
14            HttpWebResponse myHttpWebResponse=(HttpWebResponse)myHttpWebRequest.GetResponse(); 
15            myHttpWebResponse.Cookies=myCookieContainer.GetCookies(myHttpWebRequest.RequestUri); 
16            Stream myResponseStream=myHttpWebResponse.GetResponseStream(); 
17            StreamReader myStreamReader=new StreamReader(myResponseStream,Encoding.GetEncoding("gb2312")); 
18            outdata=myStreamReader.ReadToEnd(); 
19            myStreamReader.Close(); 
20            myResponseStream.Close();
21            return outdata;
22        }
Code
CookieContainer myCookieContainer=new CookieContainer(); 
string url="?????????????????";//登录页面的链接,看from里面的action
string loginfo="?????????????????";//登录字符串,例如user=??&pass=????
PostData(url,loginfo,myCookieContainer);//这个返回的应该是登录成功的信息,而且写好cookie了

url="???????????";//这个就是想要读取的页面地址,普通情况用StreamReader是读不到的喔

PostData(url,"",myCookieContainer);//返回的就是目标页面,完成,如果还要连续读其它页面,继续这两句代码就行了(cookie已经保存了，自己用就好了).