模拟访问的网页源代码代码,Asp.Net代码库,德仔网

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【Asp.Net】模拟访问的网页源代码
作者:Malcolm / 发布于2015/4/16/ 701

	/// <summary>
	 /// 常用的Http工具函数集合
	 /// </summary>
	 class HtmlTool
	 {
	 /// <summary>
	 /// 模拟POST访问
	 /// </summary>
	 /// <param name="postUrl">模拟POST的URL</param>
	 /// <param name="postDataStr">需要POST的数据</param>
	 /// <returns>模拟访问的网页源代码</returns>
	 public static string sendPost(string postUrl, string postDataStr)
	 {
	 string retString = "";
	 if (Global.noException)
	 {
	 //用来存放cookie
	 CookieContainer cookie = null;
	 HttpWebRequest request = null;
	 Stream myRequestStream = null;
	 StreamWriter myStreamWriter = null;
	 HttpWebResponse response = null;
	 Stream myResponseStream = null;
	 StreamReader myStreamReader = null;
	 try
	 {
	 cookie = new CookieContainer();

	 //发送一个POST请求
	 request = (HttpWebRequest)WebRequest.Create(postUrl);
	 request.Method = "POST";
	 request.ContentType = "application/x-www-form-urlencoded";
	 request.ContentLength = Encoding.UTF8.GetByteCount(postDataStr);
	 request.CookieContainer = cookie;
	 myRequestStream = request.GetRequestStream();
	 myStreamWriter = new StreamWriter(myRequestStream, Encoding.GetEncoding("gb2312"));
	 myStreamWriter.Write(postDataStr);

	 //获取返回的内容
	 response = (HttpWebResponse)request.GetResponse();
	 response.Cookies = cookie.GetCookies(response.ResponseUri);
	 myResponseStream = response.GetResponseStream();
	 myStreamReader = new StreamReader(myResponseStream, Encoding.GetEncoding("utf-8"));
	 retString = myStreamReader.ReadToEnd();
	 }
	 catch (Exception ex)
	 {
	 Global.noException = false;
	 Console.Write("发送POST失败！\n报错：" + ex.Message);
	 }
	 finally {
	 if (myStreamWriter != null)
	 {
	 myStreamWriter.Close();
	 }
	 if (myStreamReader != null)
	 {
	 myStreamReader.Close();
	 }
	 if (myResponseStream != null)
	 {
	 myResponseStream.Close();
	 }
	 if (response != null)
	 {
	 response.Close();
	 }
	}
	 }
	 return retString;
	 }

	 /// <summary>
	 /// 模拟GET访问
	 /// </summary>
	 /// <param name="getUrl">模拟GET的URL</param>
	 /// <returns>模拟访问的网页源代码</returns>
	 public static string SendGet(string getUrl)
	 {
	 string retString = "";
	 if (Global.noException)
	 {
	 HttpWebRequest request = null;
	 HttpWebResponse response = null;
	 Stream myResponseStream = null;
	 StreamReader myStreamReader = null;
	 try
	 {
	 request = (HttpWebRequest)WebRequest.Create(getUrl);
	 request.Method = "GET";
	 request.ContentType = "text/html;charset=UTF-8";
	 response = (HttpWebResponse)request.GetResponse();
	 myResponseStream = response.GetResponseStream();
	 myStreamReader = new StreamReader(myResponseStream, Encoding.GetEncoding("utf-8"));
	 retString = myStreamReader.ReadToEnd();
	 }
	 catch (Exception ex)
	 {
	 Global.noException = false;
	 Console.Write("发送GET失败！\n报错：" + ex.Message);
	 }
	 finally {
	 if (myStreamReader != null)
	 {
	 myStreamReader.Close();
	 }
	 if (myResponseStream != null)
	 {
	 myResponseStream.Close();
	 }
	 if (response != null)
	 {
	 response.Close();
	 }
	 }
	 }
	 return retString;
	 }

	
	 /// <summary>
	 /// 获取某个URL的重定向地址
	 /// </summary>
	 /// <param name="getUrl">原始的地址</param>
	 /// <returns>重定向之后的地址</returns>
	 public static string GetRedirection(string getUrl)
	 {
	 if (Global.noException)
	 {
	 HttpWebRequest request = null;
	 HttpWebResponse response = null;
	 try
	 {
	 request = (HttpWebRequest)WebRequest.Create(getUrl);
	 request.AllowAutoRedirect = false;
	 request.Method = "GET";
	 request.ContentType = "text/html;charset=UTF-8";
	 response = (HttpWebResponse)request.GetResponse();
	 if (response.Headers.Get("Location") == null)
	 return "";
	 return response.Headers.Get("Location");
	 }
	 catch (Exception ex)
	 {
	 Global.noException = false;
	 Console.Write("获取重定向失败！报错：\n" + ex.Message);
	 }
	 finally {
	 if (response != null)
	 {
	 response.Close();
	 }
	 }
	 }
	 return "";
	 }

	 /*
	 * 在post的时候有时也用的到cookie
	 * 所以在外部一个cookie属性随时保存
	 * CookieContainer cookie = new CookieContainer();
	 * 注意：有时候请求会重定向，但我们就需要从重定向url获取东西，可以用:
	 * request.AllowAutoRedirect = false;
	 * 设置重定向禁用，你就可以从headers的Location属性中获取重定向地址
	 */

	 }
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　模拟POST访问　　　　POST　
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