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LWP cookie mystery

by Anonymous Monk
on Aug 03, 2002 at 02:34 UTC ( #187280=perlquestion: print w/ replies, xml ) Need Help??
Anonymous Monk has asked for the wisdom of the Perl Monks concerning the following question:

I have been trying to GET a page which requires a cookie to be received properly. What I eventually want to do is to POST some info to a form on this page and do a login with the help of LWP.

I know there are some other nodes on this subject, like this one LWP, extract_cookies, etc. , but I can't figure out what is wrong in my case.. The cookie which I receive does not seem to be "picked up" and is not saved to file (I save cookies in file for debugging purpose of this script).

What I bascily want to do is just to GET the url where the form, that I'm going to POST to later, is located. If I can receive the url with correct cookie handling, I'm sure POST'ing will not be difficult either. Here is my code:

#!c:/perl/bin/perl use strict; use LWP::UserAgent; use HTTP::Request; use HTTP::Cookies; use HTTP::Response; use HTTP::Headers; use HTTP::Message; use HTTP::Request::Common; use LWP::Debug; use CGI; #STORE COOKIES IN FILE my $cookie_file = qq(c:/tmp3/mycookie.txt); #HOW MANY TIMES HAVE $cookie_jar BEEN CHANGED local $main::called_cookie = 0; my $query = new CGI; print $query->header; #NEW USER-AGENT OBJEKT my $ua = LWP::UserAgent->new; $ua->agent('Mozilla/4.0'); #NEW COOKIE_JAR my $cookie_jar=HTTP::Cookies->new ('file' => "$cookie_file", 'autosave' => '1'); #SUB TO BE CALLED WHEN $cookie_jar CHANGES _ FOR DEBUGGING $cookie_jar->scan(\&cookiesub); $cookie_jar->clear(); #VARIOUS TEST-SITES WHERE WE RECEIVE COOKIES #my $req = GET 'http://www.cdnow.com'; #my $req = GET 'http://www.msn.com' ; #my $req = GET 'http://www.amazon.com'; #WANTED !! my $req = GET 'http://mother.netcom.no/Login/login_page.html'; #GO GET INFO my $resp=$ua->request($req); #UPDATE $cookie_jar; $cookie_jar->extract_cookies($resp); #PRINT RETURNED HEADERS print $resp->headers_as_string(); #SHOW VALUE OF $cookie_jar NOW print "\n\nMy Cookie_jar is now:".$cookie_jar->as_string."\n\n"; #SHOW RESPONSE #print "\n\n".$resp->as_string; #SAVE $cookie_jar TO FILE; $cookie_jar->save(); exit; sub cookiesub { print "\n\n----------------\n\Cookie has been altered"; print "\nCookie_counter:$main::called_cookie \n"; $main::called_cookie++; print "@_"; print "\n----------------\n"; }
I receive reply that I need to "accept cookies" when I GET the wanted url. No cookie-values are saved to file, but when I print the cookie value with
print "\n\nMy Cookie_jar is now:".$cookie_jar->as_string."\n\n";
I get:
Set-Cookie3: NETSCAPE_LIVEWIRE_ID=305A68095915248EF4A4BD81DABFD4F90021 +A1F2; path="/Login"; domain="mother.netcom.no"; path_spec; discard; v +ersion=0
What is wrong? Should this not have been handled automatic by LWP::UserAgent? What Can be done to receive the wanted URL with correct cookie handling?
I've tried doing several GET's after updating $cookie_jar with
$cookie_jar->extract_cookies($resp);
but that does not seem to help.

Also when I try to GET the amazon url, I see 3 Set-Cookies Headers in the HTTP::Response object ($res), but only 2 is saved to file? What is that all about?

I've been banging my head in the wall for too long about this. I need some help!

I'd REALLY appreciate any tips.
Thanks.
Regards, Tom

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Re: LWP cookie mystery
by dws (Chancellor) on Aug 03, 2002 at 04:20 UTC
    What I bascily want to do is just to GET the url where the form, that I'm going to POST to later, is located. If I can receive the url with correct cookie handling, I'm sure POST'ing will not be difficult either.

    This example script solves exactly that problem.

Re: LWP cookie mystery
by Cine (Friar) on Aug 03, 2002 at 09:13 UTC
    Try using $ua->cookie_jar($cookie_jar) before the request, instead of the $cookie_jar->extract_cookies($resp); after the request. The latter wont pick up cookies recieved on redirects in the original request (I've hit plenty of sites with this problem).

    T I M T O W T D I
      Hi,
      I just want to say thanks to you guys for helping me out with this script (I got the script working earlier today). Once I started to ignore output to file, everything got much easier.Just let the force of LWP do the work and ignore cookie-fileoutput..

      Special thanks to dws for his similar script as the one I was trying to make.

      I hope to become a better coder so that I can come back and offer help too.
      Regards,Tom

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