jeroenes, did you forget the hex conversion?
(his reply is now below)
# reading (for example, a gif)
local $/ = undef;
open FILE, $file;
binmode(FILE); # needed for win32
$gif = <FILE>;
$hexgif = unpack ("H*", $gif); # convert gif to hex string

# printing
$gif = pack ("H*", $hexgif); # convert hex string back to binary data
print "Content-type: image/gif\n\n";
binmode(STDOUT);
print $gif;

[download]

Update: jeroenes is right about the size consideration. You asked for hex so that's what this code does. But a hex string is double the size of the binary data is encodes. Here are the results of some different methods for encoding binary data as text:

bytesformat% of original
5008 original jpeg 100.00%
10016 hex string 200.00%
6904 uuencoded 137.86%
6768 base64 135.14%
6706 zlib/uuencoded 133.91%
6574 zlib/base64 131.27%
4865 zlib (binary) 97.14%

In reply to Re: Re: Hex format conversion in Perl by epoptai
in thread Hex format conversion in Perl by mkadlec

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