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

Hey wise ones. Im having problems with the CGI.pm module
It seems for one reason or another the CGI module cannot decode both sets of forms (GET & POST) at the same time. If a form post is sent through along with a query string the query string is dropped.
Example (HTML File) 
<form action="formpost.cgi?m=hello" method="post">

<textarea name="big"></textarea>
<input type="hidden" name="large" value=1>
<input type="hidden" name="transmit" value=1>
<input type="submit" value="1">
</form>

[download]

Example (Perl Code) 
#!/usr/bin/perl

use CGI;

$form = new CGI;

print "Content-type: text/html\n\n";
print $form->param("big");
print $form->param("m");

[download]
Any ideas?

Replies are listed 'Best First'.
Re: Problems with CGI.pm
by merlyn (Sage) on Jul 15, 2005 at 15:42 UTC
    That behavior is expected, and documented.

    Perhaps you missed this in the docs (you did consult the docs, correct?): 

           MIXING POST AND URL PARAMETERS

          $color = $query->url_param('color');

       It is possible for a script to receive CGI parameters in the UR
+L as
       well as in the fill-out form by creating a form that POSTs to a
+ URL
       containing a query string (a "?" mark followed by arguments).  
+The
       param() method will always return the contents of the POSTed fi
+ll-out
       form, ignoring the URL's query string.  To retrieve URL paramet
+ers,
       call the url_param() method.  Use it in the same way as param()
+.  The
       main difference is that it allows you to read the parameters, b
+ut not
       set them.

       Under no circumstances will the contents of the URL query strin
+g inter-
       fere with similarly-named CGI parameters in POSTed forms.  If y
+ou try
       to mix a URL query string with a form submitted with the GET me
+thod,
       the results will not be what you expect.

    [download]

    -- Randal L. Schwartz, Perl hacker
    Be sure to read my standard disclaimer if this is a reply.

[reply]
[d/l]
Re: Problems with CGI.pm
by BUU (Prior) on Jul 15, 2005 at 22:27 UTC
[reply]

Back to Seekers of Perl Wisdom