Yes, this would take a lot of memory if you read in a large file to a string first.
To force download of a large file, just print the file as you read it in like this:

if(-e $file) {
    if(open(SESAME, "< $file")) {
        print "Content-Disposition: attachment; filename=$file\n";
        print "Content-Type: application/octet-stream\n";
        print "Content-Length: " . (-s $file) . "\n\n";
        while(<SESAME>) {
            print $_;
        }
        close(SESAME);
    }
    else {
        print "Content-Type: text/html\n\nError: Could not read from f
+ile\n";
    }
}
else {
    print "Content-Type: text/html\n\nError: invalid filename\n";
}

[download]


http://uan.no-ip.org

In reply to Re^4: Downloading things from a database by upallnight
in thread Downloading things from a database by Anonymous Monk

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.