#!/usr/local/bin/perl
#
# Subroutine to read CGI input.
# Script stuck together from work by S.E.Brenner@bioc.cam.ac.uk
# and ronnie@scs.leeds.ac.uk by nik@scs.leeds.ac.uk
#
# Subroutine &read_input takes and decodes data either from
# QUERY_STRING (for GET method, default) or STDIN (for POST method)
# Returned is an associative array of names and values.
#
# For the latest version of this script see Steve Brenner's page on
# http://www.bio.cam.ac.uk/web/form.html


sub read_input
{
    local ($buffer, @pairs, $pair, $name, $value, %FORM);
    # Read in text
    $ENV{'REQUEST_METHOD'} =~ tr/a-z/A-Z/;
    if ($ENV{'REQUEST_METHOD'} eq "POST")
    {
	read(STDIN, $buffer, $ENV{'CONTENT_LENGTH'});
    } else
    {
	$buffer = $ENV{'QUERY_STRING'};
    }
    # Split information into name/value pairs
    @pairs = split(/&/, $buffer);
    foreach $pair (@pairs)
    {
	($name, $value) = split(/=/, $pair);
	$value =~ tr/+/ /;
	$value =~ s/%(..)/pack("C", hex($1))/eg;
	$FORM{$name} = $value;
    }
    %FORM;
}