日期:2014-05-18 浏览次数:20854 次
//定义对象 HttpWebRequest _request = null; HttpWebResponse _response = null; try { //创建web请求类 _request = (HttpWebRequest)WebRequest.Create(_destUrl); //取得响对象 _response = (HttpWebResponse)_request.GetResponse(); //获取数据 _resultStr = ConvertResponseToString(_response); } catch (WebException ex) { //获取响应对象 _response = ex.Response as HttpWebResponse; //处理错误 if (_response.StatusCode == HttpStatusCode.InternalServerError) { } else { _resultStr = ex.Message; } } finally { if (_response != null) _response.Close(); }
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/// <summary> /// 获取指定页面的源代码 /// </summary> /// <param name="PageURL"></param> /// <returns></returns> public String GetPageCode(string PageURL) { string Charset = "gb2312"; try { //存放目标网页的html String strHtml = ""; //连接到目标网页 HttpWebRequest wreq = (HttpWebRequest)WebRequest.Create(PageURL); wreq.Headers.Add("X_FORWARDED_FOR", "101.0.0.11"); //发送X_FORWARDED_FOR头(若是用取源IP的方式,可以用这个来造假IP,对日志的记录无效) wreq.Method = "Get"; wreq.KeepAlive = true; wreq.ContentType = "application/x-www-form-urlencoded"; wreq.AllowAutoRedirect = true; wreq.Accept = "image/gif, image/x-xbitmap, image/jpeg, image/pjpeg, application/x-shockwave-flash, application/vnd.ms-excel, application/vnd.ms-powerpoint, application/msword, */*"; wreq.UserAgent = "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; .NET CLR 1.1.4322)"; CookieContainer cookieCon = new CookieContainer(); wreq.CookieContainer = cookieCon; HttpWebResponse wresp = null; try { wresp = (HttpWebResponse)wreq.GetResponse(); } catch (WebException ex) { wresp = (HttpWebResponse)ex.Response; } //采用流读取,并确定编码方式 Stream s = wresp.GetResponseStream(); StreamReader objReader = new StreamReader(s, System.Text.Encoding.GetEncoding(Charset)); string strLine = ""; //读取 while (strLine != null) { strLine = objReader.ReadLine(); if (strLine != null) { strHtml += strLine.Trim(); } } strHtml = strHtml.Replace("<br />", "\r\n"); return strHtml; } catch (Exception n) //遇到错误,打印错误 { return n.Message; } }
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莫非小弟面试的工作是做爬虫!
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