When running a CGI you need to output (print) what the browser shall see. Normally this is HTML-Code, but plain text or images are fine, too.

First of all you need to print a header containing the content-type and two newlines:

print "Content-type: image/png\n\n"

... and remove that line saying: Context: ....

This should work for a trial.

I would further encourage you to use strict;, enable warnings (-w) AND use CGI;.

#!/usr/bin/perl -w use strict; use CGI; my $q = CGI->new; print $q->header("image/png"); ## later print $im->png;

I'm sure, GD is not to blame.

alex pleiner <alex@zeitform.de>
zeitform Internet Dienste


In reply to Re: GD malformed header error by projekt21
in thread GD malformed header error by peppiv

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":



  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.