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

Hello Monks!

I'm trying to use WWW::Mechanize to click a "TAB" button at : http://spiedigitallibrary.org/ebooks/spies/kbart

The button's source code:

             
</table>
<br><br>
<input type="submit" name="action" value ="Excel"> <input type="submit
+" name="action" value ="CSV">
<input type="submit" name="action" value ="TAB"> <input type="submit" 
+name="action" value ="HTML">
</form>

[download]

I'm using the following line:

$mech->click_button (value => "TAB");

but get an error:

.Can't call method "header" on an undefined value at ....app/perl-5.10.1/lib/site_perl/5.10.1/WWW/Mechanize.pm line 2381.

What can be the problem?
Thank you in advance!
Danny

Replies are listed 'Best First'.
Re: Using Mechanize to click a button
by moritz (Cardinal) on Mar 17, 2011 at 10:59 UTC
[reply]

      Sorry, here it is

              my $mech = WWW::Mechanize->new();
        print "Accessing $url\n";
        $mech->get($url);
        print "Downloading the file...";
        $mech->click_button (value => "TAB");
        $mech->save_content( $full_path );
        print "Done.\n";

      [download]
      Thanks! output: 
      Accessing http://spiedigitallibrary.org/ebooks/spies/kbart?isAuthorize
+d=no
Downloading the file...Can't call method "header" on an undefined valu
+e at /exlibris/sfx_ver/app/perl-5.10.1/lib/site_perl/5.10.1/WWW/Mecha
+nize.pm line 2381.

      [download]
      If I hash out the code related to the button the main mage is saved without problem.
[reply]
[d/l]
[select]

        The WWW::Mechanize documentation says that click_button works on the "current Form", which might be the source of your problem. There's a search form before the form you are interested in.

        So you might need to invest some effort into selecting the right form.

        Perl 6 - second systems done right
[reply]

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