java - Jsoup connect():绕过Google验证码

我做了一个小应用程序，我必须根据关键字检索URL。
这是代码：

  Elements doc = Jsoup
        .connect(request)
        .userAgent(
          "Mozilla 5.0 (Windows NT 6.1)")
        .timeout(5000).get().select("li.g>h3>a");


        for (Element link : doc) {

              String url = link.absUrl("href");
            try {
              url = URLDecoder.decode(url.substring(url.indexOf('=') + 1, url.indexOf('&')), "UTF-8");
            } catch (UnsupportedEncodingException e) {
                    // TODO Auto-generated catch block
              e.printStackTrace();
            }



            if(!url.startsWith("http"))
                continue; // Ads/news/etc.
            else if(url.contains("/pdf/"))
                continue;
            else if(url.contains("//github.com/"))
                continue;


            res.add(url);
        }

只会收到以下错误：

org.jsoup.HttpStatusException: HTTP error fetching URL. Status=503, URL=http://ipv4.google.com/sorry/IndexRedirect?continue=http://www.google.com/search%3Flr%3Dlang_en....
at org.jsoup.helper.HttpConnection$Response.execute(HttpConnection.java:435)
at org.jsoup.helper.HttpConnection$Response.execute(HttpConnection.java:446)
at org.jsoup.helper.HttpConnection$Response.execute(HttpConnection.java:410)
at org.jsoup.helper.HttpConnection.execute(HttpConnection.java:164)
at org.jsoup.helper.HttpConnection.get(HttpConnection.java:153)
at sperimentazioni.Main.getDataFromGoogle(Main.java:327)
at sperimentazioni.Main.getURLs(Main.java:164)
at sperimentazioni.Main.main(Main.java:485)

显然是Google的验证码，我该如何绕过？

最佳答案

以下逻辑对我有用：

Document doc =
    Jsoup.connect(request)
         .userAgent("Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)")
         .timeout(5000).get();

Elements links = doc.select("a[href]");
for (Element link : links) {

    String temp = link.attr("href");
    if (temp.startsWith("/url?q="))
        result.add(temp);

}