[PerlChina] Re: 求教mech

you need

$mech->get($url) first
then try form_name

Thanks

2009/11/5 perlw01f <p3r1w01f@gmail.com>:
>
> 用 mechanize 模 拟登 录没有问题，如下：
> --------------------------------------------------------------------
> #!/usr/bin/perl
> use strict;
> use WWW::Mechanize;
> use HTTP::Cookies;
> my $outfile = "out.htm";
> #my $url = 'http://www7.i.demo.com/cgi-bin/login';
> my $username = 'hello@demo.com';
> my $password = "test";
> my $mech = WWW::Mechanize->new(autocheck => 1);
> $mech->cookie_jar(HTTP::Cookies->new());
> $mech->post(
>          'http://www7.i.demo.com/cgi-bin/login',
>          [
>              'User-Agent' => 'Mozilla/5.0 (Windows; U; Windows NT
> 5.1; zh-CN; rv:1.9.0.11) Gecko/2009060215 Firefox/3.0.11',
>              'LoginName' => "$username",
>              'Password'  => "$password",
>          ],
>      );
> my $output_page = $mech->content();
> open(OUTFILE, ">$outfile");
> print OUTFILE "$output_page";
> close(OUTFILE);
> ------------------------------------------------------
>
> 但是模仿提交form 有问题， 代码如下：
> -----------------------------------------------------
> #!/usr/bin/perl
> use strict;
> use WWW::Mechanize;
> use HTTP::Cookies;
> my $outfile = "out.htm";
> my $url = 'http://www7.i.demo.com/cgi-bin/login';
> my $username = 'hello@demo.com';
> my $password = "test";
> my $mech = WWW::Mechanize->new(autocheck => 1);
> $mech->cookie_jar(HTTP::Cookies->new());
> $mech->post($url); #$mech->get($url);这个应该是post吧?
> $mech->form_name('Logon');
> $mech->field(LoginName => $username);
> $mech->field(Password => $password);
> $mech->submit();
> my $output_page = $mech->content();
> open(OUTFILE, ">$outfile");
> print OUTFILE "$output_page";
> close(OUTFILE);
> -------------------------------------------------------
> 报错：
> There is no form named "Logon" at C:\DOCUME~1\wf\LOCALS~1\Temp
> \dirDB0.tmp\02.pl line 12
> Can't call method "value" on an undefined value at C:/Perl/site/lib/
> WWW/Mechanize.pm line 1348.
>
> 网页部分源码：
> <div id="logonForm">
> <form method="post" action="/cgi-bin/login" id="Logon" name="Logon"
> onsubmit="return val.isValid()">
>
> 问题：根据源码来看 $mech->form_name('Logon'); 应该没错吧?
> 可是为什么error显示无此form呢?
> 跟js有关么?
> 多谢
> >
>

--
Fayland Lam // http://www.fayland.org/

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