我如何确定URL是否重定向？ [英] How can I determine if a URL redirects?

问题描述

如果我有网址（例如 http://www.foo.com/ alink.pl?page=2 ），我想确定我是否被重定向到另一个链接。我也想知道最终的网址（例如 http://www.foo.com/other_link。 PL ）。最后，我想在Perl和Groovy中做到这一点。

 使用LWP :: UserAgent; 
 my $ ua = LWP :: UserAgent-> new; 
 
 my $ request = HTTP :: Request-> new（GET =>'http://google.com/'）; 
 my $ response = $ ua->请求（$ request）; 
 if（$ response-> is_success and $ response-> previous）{
 print $ request-> url，'redirected to'，$ response-> request-> uri， \\\
; 
} 
  

If I have a URL (eg. http://www.foo.com/alink.pl?page=2), I want to determine if I am being redirected to another link. I'd also like to know the final URL (eg. http://www.foo.com/other_link.pl). Finally, I want to be able to do this in Perl and Groovy.

解决方案

In Perl:

use LWP::UserAgent;
my $ua = LWP::UserAgent->new;

my $request  = HTTP::Request->new( GET => 'http://google.com/' );
my $response = $ua->request($request);
if ( $response->is_success and $response->previous ) {
    print $request->url, ' redirected to ', $response->request->uri, "\n";
}

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