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POPERL CGI: Filehandle that uses both binary and text mode
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copied!<p>I have a perl program that writes application/zip document with binary data. I can do the following code in my cgi script. </p> <pre><code>print $cgi->header(-type=>"application/x-zip; name=\"$filename.zip\"", -content_disposition=> "attachment; filename=\"$filename.zip\""). "\n"; print $result </code></pre> <p>where <code>$result</code> is the binary data. This will then output a page that prompts the user to download the zip</p> <p>What I want to do though is pass that entire 'webpage' as form parameter, so I did this: </p> <pre><code>open $resultfh, ">", \$output_buffer or die "could not open buffer"; print $resultfh $cgi->header(-type=>"application/x-zip; name=\"$filename.zip\"", -content_disposition=> "attachment; filename=\"$filename.zip\""). "\n"; print $resultfh $result </code></pre> <p>and then I can pass the <code>$output_buffer</code> around as variable. </p> <p>The problem is that this doesn't work, <em>something</em> seems to get passed because I'm prompted to download the zipfile, but the zipfile is corrupted, I get a mismatch between the expected bytes and the actual bytes or something. </p> <p>I <em>think</em> this has to do with that output buffer not being in binary mode, but I can't read the content header in binary mode, so can I have a file handle be partially in text and partially in binary?</p> <p>If not, what options do I have?</p> <p><strong>EDIT:</strong> The problem actually seems to happen when I pass the binary data as a cgi form param. Anyone know what the problem might be? Maybe a size limit? </p>

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