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Asp.Net、asp实现的搜索引擎网址收录检查程序

2024-07-10 12:43:10
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使用asp.net或者asp检查某个url地址,某篇文章是否被搜索引擎,如百度,谷歌,搜狗收录。

实现原理:直接搜索你那篇文章的url地址(不带协议,但上协议也行,代码会自动去掉协议内容),如果被索引会返回搜索结果,否则会提示找不到信息。

Asp.Net检查百度,谷歌,搜狗搜索引擎是否收录文章网址源代码:

using System;using System.Net;using System.Text;using System.IO;using System.Web;public class SearchEngineIndex{  public static string[] urls = { //搜索引擎检查地址      "http://www.baidu.com/s?ie=utf-8&wd=",//百度索引url检查地址      "https://www.google.com.hk/search?q=",//谷歌索引url检查地址      "http://www.sogou.com/web?ie=utf8&query="//搜狗索引url检查地址    }    , noFindKeyword = { "抱歉,没有找到与", "找不到和您的查询", "未收录?" };//搜索引擎未索引url地址时的关键字  /// <summary>  /// 获取响应的编码  /// </summary>  /// <param name="contenttype"></param>  /// <returns></returns>  private static Encoding GetEncoding(string contenttype)  {    if (!string.IsNullOrEmpty(contenttype))    {      contenttype = contenttype.ToLower();      if (contenttype.IndexOf("gb2312") != -1 || contenttype.IndexOf("gbk") != -1) return Encoding.GetEncoding(936);      if (contenttype.IndexOf("big5") != -1) return Encoding.GetEncoding(950);    }    return Encoding.UTF8;  }  /// <summary>  /// 使用HttpWebRequest对象,自动识别字符集  /// </summary>  /// <param name="url"></param>  /// <param name="addUseragent">是否添加UserAgent,采集其他网站时防止被拦截</param>  /// <returns></returns>  public static string GetHtml(string url, bool addUseragent)  {    HttpWebRequest request = (HttpWebRequest)HttpWebRequest.Create(url);    if (addUseragent) request.UserAgent = "Googlebot|Feedfetcher-Google|Baiduspider";    string html = null;    try    {      HttpWebResponse response = (HttpWebResponse)request.GetResponse();      StreamReader srd = new StreamReader(response.GetResponseStream(), GetEncoding(response.ContentType));      html = srd.ReadToEnd();      srd.Close();      response.Close();    }    catch { }    return html;  }  /// <summary>  /// 检查某个url是否被搜索引擎索引  /// </summary>  /// <param name="url">url地址</param>  /// <param name="engin">0:百度 1:谷歌 2:搜狗,其他搜索引擎如bing和360直接查网址显示的结果不是直接得到网址的,有些出入,不做检查</param>  /// <returns></returns>  public static bool CheckIndex(string url, int engin)  {    if (string.IsNullOrEmpty(url)) return false;    if (engin < 0 || engin > 2) engin = 0;    url = urls[engin] + HttpUtility.UrlEncode(url.ToLower().Replace("http://", "").Replace("https://", ""));    bool r = true;    string html = GetHtml(url, true);    if (html == null || html.IndexOf(noFindKeyword[engin]) != -1) r = false;    return r;  }}//调用方法示例    SearchEngineIndex.CheckIndex("www.Vevb.com/article/20101014/2902.aspx", 0);//检查百度索引    SearchEngineIndex.CheckIndex("www.Vevb.com/article/20101014/2902.aspx", 1);//检查谷歌索引    SearchEngineIndex.CheckIndex("www.Vevb.com/article/20101014/2902.aspx", 2);//检查搜狗索引            
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