内网用户或代理上网的用户使用
using System.IO;
using System.Net;
public string get_html()
{
string urlStr = "http://www.domain.com"; //設定要獲取的地址
HttpWebRequest hwr = (HttpWebRequest)HttpWebRequest.Create(urlStr); //建立HttpWebRequest對象
hwr.Timeout = 60000; //定義服務器超時時間
WebProxy proxy = new WebProxy(); //定義一個網關對象
proxy.Address = new Uri("http://proxy.domain.com:3128"); //網關服務器:端口
proxy.Credentials = new NetworkCredential("f3210316", "6978233"); //用戶名,密碼
hwr.UseDefaultCredentials = true; //啟用網關認証
hwr.Proxy = proxy; //設置網關
try
{
HttpWebResponse hwrs = (HttpWebResponse)hwr.GetResponse(); //取得回應
}
catch
{
MessageBox.Show("无法连接代理!");
return;
}
//判断HTTP响应状态
if(hwrs.StatusCode != HttpStatusCode.OK)
{
MessageBox.Show("访问失败!");
hwrs.Close();
return;
}
else
{
Stream s = hwrs.GetResponseStream(); //得到回應的流對象
StreamReader sr = new StreamReader(s, Encoding.UTF8); //以UTF-8編碼讀取流
StringBuilder content = new StringBuilder(); //
while (sr.Peek() != -1) //每次讀取一行,直到
{ //下一個字節沒有內容
content.Append(sr.ReadLine()+""r"n"); //返回為止
} //
//return content.ToString() ;
}
//输出所有的Header(当然包括服务器输出的Cookie)
//for(int ii=0;ii<hwrs.Headers.Count;ii++)
//{
//MessageBox.Show(hwrs.Headers.GetKey(ii)+":"+res.Headers[ii]);
//}
}
C#用HttpWebRequest通过代理服务器验证后抓取网页内容
那有没有什么办法呢?
当然有,呵呵,见以下代码:
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