problem loggin into pm

holli has asked for the wisdom of the Perl Monks concerning the following question:

Brethren,
I'm struggling with this for a while now and it seems i can't get it to work. I have written a script to log into PM, it runs smooth, just it doesn't work/login.

use warnings;
use strict;

use Digest::SHA1 qw( sha1_hex );
use WWW::Mechanize;
use HTTP::Cookies;
use LWP::Debug qw(+);

login($ARGV[0], $ARGV[1]);

sub login 
{
    my ($user, $pass) = @_;
    
    my $kennung = sha1_hex("$user + $pass");
    
    my $cookie_jar = HTTP::Cookies->new(
        file => "/cookies/$kennung.dat",
        autosave => 1,
    );
    
    my $mech = WWW::Mechanize->new( cookie_jar => $cookie_jar );

    my $resp = $mech->get( 'http://www.perlmonks.org?node_id=109' );

    die "HTTP-Error 1\n"
        unless $resp->is_success;

    $resp = $mech->submit_form(
        form_name  => 'login',
        fields => {
            user     => $user,
            passwd   => $pass,
        }
    );

    die "HTTP-Error 2\n"
        unless $resp->is_success;

    if ( $resp->content =~ /<a href="\?node_id=109;op=logout">/ )
    {
        print "log in ok";
    }
    else
    {
        print "could not log in";
    }
}
[download]

This is the output of LWP::Debug

C:\devel>pmlogin.pl holli xxxxxxx
LWP::UserAgent::new: ()
LWP::UserAgent::request: ()
HTTP::Cookies::add_cookie_header: Checking www.perlmonks.org for cooki
+es
HTTP::Cookies::add_cookie_header: Checking .perlmonks.org for cookies
HTTP::Cookies::add_cookie_header: Checking perlmonks.org for cookies
HTTP::Cookies::add_cookie_header: Checking .org for cookies
LWP::UserAgent::send_request: GET http://www.perlmonks.org?node_id=109
LWP::UserAgent::_need_proxy: Not proxied
LWP::Protocol::http::request: ()
LWP::Protocol::collect: read 847 bytes
LWP::Protocol::collect: read 312 bytes
LWP::Protocol::collect: read 1336 bytes
LWP::Protocol::collect: read 1336 bytes
LWP::Protocol::collect: read 1336 bytes
LWP::Protocol::collect: read 1336 bytes
LWP::Protocol::collect: read 1336 bytes
LWP::Protocol::collect: read 1336 bytes
LWP::Protocol::collect: read 1336 bytes
LWP::Protocol::collect: read 1336 bytes
LWP::Protocol::collect: read 1336 bytes
LWP::Protocol::collect: read 1336 bytes
LWP::Protocol::collect: read 1336 bytes
LWP::Protocol::collect: read 1336 bytes
LWP::Protocol::collect: read 1336 bytes
LWP::Protocol::collect: read 1336 bytes
LWP::Protocol::collect: read 130 bytes
LWP::UserAgent::request: Simple response: OK
LWP::UserAgent::request: ()
HTTP::Cookies::add_cookie_header: Checking www.perlmonks.org for cooki
+es
HTTP::Cookies::add_cookie_header: Checking .perlmonks.org for cookies
HTTP::Cookies::add_cookie_header: Checking perlmonks.org for cookies
HTTP::Cookies::add_cookie_header: Checking .org for cookies
LWP::UserAgent::send_request: POST http://www.perlmonks.org?
LWP::UserAgent::_need_proxy: Not proxied
LWP::Protocol::http::request: ()
LWP::Protocol::collect: read 847 bytes
LWP::Protocol::collect: read 1648 bytes
LWP::Protocol::collect: read 1336 bytes
LWP::Protocol::collect: read 1336 bytes
LWP::Protocol::collect: read 1336 bytes
LWP::Protocol::collect: read 1336 bytes
LWP::Protocol::collect: read 1336 bytes
LWP::Protocol::collect: read 1336 bytes
LWP::Protocol::collect: read 1336 bytes
LWP::Protocol::collect: read 1336 bytes
LWP::Protocol::collect: read 1336 bytes
LWP::Protocol::collect: read 1336 bytes
LWP::Protocol::collect: read 1336 bytes
LWP::Protocol::collect: read 1336 bytes
LWP::Protocol::collect: read 1336 bytes
LWP::Protocol::collect: read 310 bytes
LWP::UserAgent::request: Simple response: OK
could not log in
[download]

Of course I have doublechecked the credentials.

holli, /regexed monk/

Comment on problem loggin into pm Select or Download Code

Replies are listed 'Best First'.
Re: problem loggin into pm by davidrw (Prior) on Jan 08, 2008 at 13:17 UTC
Make it: `passwd => substr($pass,0,8),` [download] And it should work. I d/l'd your script and ran into the same frustration ... Everything looked good compared to `mech-dump 'http://www.perlmonks.org?node_id=109'` and browser/ViewScource ... tried removing the cookie jar, changing the agent, etc. Finally went to Live HTTP headers in firefox to take the POST'd data to manually create a POST w/LWP (instead of mech), and then noticed that my password was passed as 12345678 when it's really 123456789 ... Checked the html source again and there is a `maxlength=8` for the password field ... /me goes off to research now how to recognize that in WWW::Mechanize ... Update: See RFC: Where to patch to enforce maxlength in Mech? for thoughts on possibly adding a feature/patch for it.	[reply] [d/l] [select]
Re^2: problem loggin into pm by holli (Abbot) on Jan 08, 2008 at 13:44 UTC
Many thanks! So the last 2 digits of my password are actually ignored, eh? That bugs me a little, because without them my password is an ordinary word, prone to dictionary attacks. I wonder what's the reason for this oviously arbitrary limitation. holli, /regexed monk/	[reply] [d/l]
Re: problem loggin into pm by shmem (Chancellor) on Jan 08, 2008 at 13:37 UTC
Typo: `my $resp = $mech->get( 'http://www.perlmonks.org?node_id=109' ); # here ----------------------------------------^^` [download] That should be `my $resp = $mech->get( 'http://www.perlmonks.org/?node_id=109' );` [download] "works for me"[tm] changing that ;-) (I guess WWW::Mechanize doesn't repost the credentials upon redirects) update: I see you want to store your cookie under `/cookies` - is that right? root dir? is that your folder, do you have write access to that? --shmem _($_=" "x(1<<5)."?\n".q·/)Oo. G°\ / /\_¯/(q / ---------------------------- \__(m.====·.(_("always off the crowd"))."· ");sub _{s./.($e="'Itrs `mnsgdq Gdbj O`qkdq")=~y/"-y/#-z/;$e.e && print}	[reply] [d/l] [select]
Re^2: problem loggin into pm by holli (Abbot) on Jan 08, 2008 at 13:50 UTC
That doesnt change anything on my end. holli, /regexed monk/	[reply] [d/l]