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【Asp.Net】 GET和POST方式抓取远程页面

作者:dezai / 发布于2014/2/25/ 349

GET和POST方式抓取远程页面

using System.IO;
using System.Net;
using System.Text;
using System.Text.RegularExpressions;

//以GET方式抓取远程页面内容
  public string Get_Http(string tUrl)
  {
    string strResult;
    try
    {
      HttpWebRequest hwr = (HttpWebRequest)HttpWebRequest.Create(tUrl);
      hwr.Timeout = 19600;
      HttpWebResponse hwrs = (HttpWebResponse)hwr.GetResponse();
      Stream myStream = hwrs.GetResponseStream();
      StreamReader sr = new StreamReader(myStream, Encoding.Default);
      StringBuilder sb = new StringBuilder();
      while (-1 != sr.Peek())
      {
        sb.Append(sr.ReadLine() + "\r\n");
      }
      strResult = sb.ToString();
      hwrs.Close();
    }
    catch (Exception ee)
    {
      strResult = ee.Message;
    }
    return strResult;
  }

//以POST方式抓取远程页面内容
//postData为参数列表
  public string Post_Http(string url, string postData, string encodeType, out string err)
  {
    string uriString = url;
    byte[] byteArray;
    byte[] responseArray;
    //postData = "checkvalue=32&bbb=%CD%B6%C6%B1&ilc=0&kkk=22";
    Encoding encoding = Encoding.GetEncoding(encodeType);
    try
    {
      WebClient myWebClient = new WebClient();
      WebHeaderCollection myWebHeaderCollection;
      myWebClient.Headers.Add("Content-Type", "application/x-www-form-urlencoded");
      //myWebClient.Headers.Add("Referer","http://xxxxx/xxxxxxxxxxxxxxxxxxxxxxxx"); 
      //myWebClient.Headers.Add("Accept-Language","zh-cn"); 
      myWebHeaderCollection = myWebClient.Headers;

      byteArray = encoding.GetBytes(postData);
      responseArray = myWebClient.UploadData(uriString, "POST", byteArray);
      err = string.Empty;
      return this.StrClearNoUse(encoding.GetString(responseArray));
    }
    catch (Exception ex)
    {
      err = ex.Message;
      return string.Empty;
    }
  }

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