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You're confusing two kinds of scripts, one that generates HTML and one that generates an image suitable for use as the src of an img tag.

Here is a simple CGI script that simply generates a page using an image tag:

#!/usr/bin/perl use strict; use warnings; use CGI qw(:all); my $q = CGI->new; print $q->header(); print $q->start_html(); print $q->img({src => 'image.gif'}); print $q->end_html();

And here is the code you want that actually emits the conttents of an image file to be used as the image src:

#!/usr/bin/perl use strict; use warnings; use CGI qw(:all); my $q = CGI->new; print $q->header(-type => 'image/gif'); open(my $F, '<', '1.gif') || die "can not open\n"; local $\ = undef; print <$F>; close($F);

Save the 2nd script as and you can modify the first script to use your second script:

#!/usr/bin/perl use strict; use warnings; use CGI qw(:all); my $q = CGI->new; print $q->header(); print $q->start_html(); print $q->img({src => ''}); print $q->end_html();


  • You don't need two inclusions of CGI, just one with the flag :all to get all the routines
  • The image MIME type does not include a character set. It's binary data, there's no concept of character set
  • The die in will never be seen unless you look at web server error logs - the browser expects binary GIF image data and won't show your error message indicating that 1.gif can't be read
  • You don't need a script to use; a static HTML page with an img tag where the src attribute is is all you need. I just showed you that to show the two types of scripts you are confusing
  • You may not be able to use as your file name; you might have to use img.cgi, depending on how your web server is configureed
  • Your Perl may not be in /usr/bin; configure as appropriate for your system
  • These scripts assume that and 1.gif are all in the same directory. This is not necessary; you can use subdirectories.
  • Be sure to read the instructions for CGI.
  • You may also want to check out Beginner's Guide to CGI Scripting with Perl

In reply to Re: Display gif in CGI page by Sinistral
in thread Display gif in CGI page by PhillipHuang

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

  • Are you posting in the right place? Check out Where do I post X? to know for sure.
  • Posts may use any of the Perl Monks Approved HTML tags. Currently these include the following:
    <code> <a> <b> <big> <blockquote> <br /> <dd> <dl> <dt> <em> <font> <h1> <h2> <h3> <h4> <h5> <h6> <hr /> <i> <li> <nbsp> <ol> <p> <small> <strike> <strong> <sub> <sup> <table> <td> <th> <tr> <tt> <u> <ul>
  • Snippets of code should be wrapped in <code> tags not <pre> tags. In fact, <pre> tags should generally be avoided. If they must be used, extreme care should be taken to ensure that their contents do not have long lines (<70 chars), in order to prevent horizontal scrolling (and possible janitor intervention).
  • Want more info? How to link or How to display code and escape characters are good places to start.
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