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1995-10-07
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#!./perl --
# Perl Routines to Manipulate CGI input
# S.E.Brenner@bioc.cam.ac.uk
# $Header: /people/seb1005/http/cgi-bin/RCS/cgi-lib.pl,v 1.2 1994/01/10 15:05:40 seb1005 Exp $
#
# Copyright 1993 Steven E. Brenner
# Unpublished work.
# Permission granted to use and modify this library so long as the
# copyright above is maintained, modifications are documented, and
# credit is given for any use of the library.
# ReadParse
# Reads in GET or POST data, converts it to unescaped text, and puts
# one key=value in each member of the list "@in"
# Also creates key/value pairs in %in, using '\0' to separate multiple
# selections
# If a variable-glob parameter (e.g., *cgi_input) is passed to ReadParse,
# information is stored there, rather than in $in, @in, and %in.
sub ReadParse {
if (@_) {
local (*in) = @_;
}
local ($i, $loc, $key, $val);
# Read in text
if ($ENV{'REQUEST_METHOD'} eq "GET") {
$in = $ENV{'QUERY_STRING'};
} elsif ($ENV{'REQUEST_METHOD'} eq "POST") {
for ($i = 0; $i < $ENV{'CONTENT_LENGTH'}; $i++) {
$in .= getc;
}
}
@in = split(/&/,$in);
foreach $i (0 .. $#in) {
# Convert plus's to spaces
$in[$i] =~ s/\+/ /g;
# Convert %XX from hex numbers to alphanumeric
$in[$i] =~ s/%(..)/pack("c",hex($1))/ge;
# Split into key and value.
$loc = index($in[$i],"=");
$key = substr($in[$i],0,$loc);
$val = substr($in[$i],$loc+1);
$in{$key} .= '\0' if (defined($in{$key})); # \0 is the multiple separator
$in{$key} .= $val;
}
return 1; # just for fun
}
# PrintHeader
# Returns the magic line which tells WWW that we're an HTML document
sub PrintHeader {
return "Content-type: text/html\n\n";
}
# PrintVariables
# Nicely formats variables in an associative array passed as a parameter
# And returns the HTML string.
sub PrintVariables {
local (%in) = @_;
local ($old, $out);
$old = $*; $* =1;
$output .= "<DL COMPACT>";
foreach $key (sort keys(%in)) {
($out = $in{$key}) =~ s/\n/<BR>/g;
$output .= "<DT><B>$key</B><DD><i>$out</I><BR>";
}
$output .= "</DL>";
$* = $old;
return $output;
}
# PrintVariablesShort
# Nicely formats variables in an associative array passed as a parameter
# Using one line per pair (unless value is multiline)
# And returns the HTML string.
sub PrintVariablesShort {
local (%in) = @_;
local ($old, $out);
$old = $*; $* =1;
foreach $key (sort keys(%in)) {
if (($out = $in{$key}) =~ s/\n/<BR>/g) {
$output .= "<DL COMPACT><DT><B>$key</B> is <DD><i>$out</I></DL>";
} else {
$output .= "<B>$key</B> is <i>$out</I><BR>";
}
}
$* = $old;
return $output;
}
1; #return true