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Code snippets: parsing GET or POST data

 

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The following routine is my standard snippet to parse transmitted data (either GET or POST, not both).

sub parse_form {

   # Get the input
   if ($ENV{'REQUEST_METHOD'} eq 'GET') {
      # Split the name-value pairs
      @pairs = split(/&/, $ENV{'QUERY_STRING'});
   }
   elsif ($ENV{'REQUEST_METHOD'} eq 'POST') {
      # Get the input
      read(STDIN, $buffer, $ENV{'CONTENT_LENGTH'});

      # Split the name-value pairs
      @pairs = split(/&/, $buffer);
   }

   foreach $pair (@pairs) {
      ($name, $value) = split(/=/, $pair);
      $value =~ tr/+/ /;
      $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C", hex($1))/eg;
      # If they try to include server side includes, erase them, so they
      # arent a security risk if the html gets returned.  Another
      # security hole plugged up.
      $value =~ s/<!--(.|\n)*-->//g;

      $FORM{$name} = $value;
   }
}

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Comments:

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