I think your server has a logic error. Consider your code:

   ...
   print "Got: $in\n";
   if ($in =~ /#:#$/) {
     ...
   } elsif ($in =~ /_$/) {
     ...
   } elsif ($in =~ /__END$/) {
     ...
   } else {
     ...
     # save file
   }
[download]

For the following input data:

Got: X-Call~4.xml#:#380_<?xml version="1.0"?>
[download]

Your logic will never get to the save file bit correctly, it will (almost) always fall inside the $in =~ /_$/ block and not saving the xml header correctly.


You probably want something like this instead:

if ($in =~ /__END$/) {
  # close previous file
} else {
  ($filename, $filesize) = $in =~ /^([^#]+)#:#(\d+)_/;

  if ($filename) {
     # create new file
  }

  # proceed with saving the file
}
[download]