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128 lines
3.2 KiB
128 lines
3.2 KiB
package C4::Interface::CGI::Output;
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# $Id$
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#package to work around problems in HTTP headers
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# Note: This is just a utility module; it should not be instantiated.
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# Copyright 2003 Katipo Communications
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#
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# This file is part of Koha.
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#
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# Koha is free software; you can redistribute it and/or modify it under the
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# terms of the GNU General Public License as published by the Free Software
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# Foundation; either version 2 of the License, or (at your option) any later
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# version.
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#
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# Koha is distributed in the hope that it will be useful, but WITHOUT ANY
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# WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
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# A PARTICULAR PURPOSE. See the GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License along with
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# Koha; if not, write to the Free Software Foundation, Inc., 59 Temple Place,
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# Suite 330, Boston, MA 02111-1307 USA
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use strict;
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require Exporter;
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use vars qw($VERSION @ISA @EXPORT);
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# set the version for version checking
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$VERSION = 0.01;
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=head1 NAME
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C4::CGI::Output - Convenience functions for handling outputting HTML pages
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=head1 SYNOPSIS
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use C4::CGI::Output;
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print $query->header(-type => C4::CGI::Output::gettype($output)), $output;
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=head1 DESCRIPTION
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The functions in this module peek into a piece of HTML and return strings
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related to the (guessed) charset.
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=head1 FUNCTIONS
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=over 2
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=cut
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@ISA = qw(Exporter);
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@EXPORT = qw(
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&guesscharset
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&guesstype
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&output_html_with_http_headers
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);
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=item guesscharset
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&guesscharset($output)
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"Guesses" the charset from the some HTML that would be output.
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C<$output> is the HTML page to be output. If it contains a META tag
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with a Content-Type, the tag will be scanned for a language code.
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This code is returned if it is found; undef is returned otherwise.
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This function only does sloppy guessing; it will be confused by
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unexpected things like SGML comments. What it basically does is to
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grab something that looks like a META tag and scan it.
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=cut
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sub guesscharset ($) {
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my($html) = @_;
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my $charset = undef;
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local($`, $&, $', $1, $2, $3);
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# FIXME... These regular expressions will miss a lot of valid tags!
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if ($html =~ /<meta\s+http-equiv=(["']?)Content-Type\1\s+content=(["'])text\/html\s*;\s*charset=([^\2\s\r\n]+)\2\s*(?:\/?)>/is) {
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$charset = $3;
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} elsif ($html =~ /<meta\s+content=(["'])text\/html\s*;\s*charset=([^\1\s\r\n]+)\1\s+http-equiv=(["']?)Content-Type\3\s*(?:\/?)>/is) {
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$charset = $2;
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}
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return $charset;
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} # guess
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sub guesstype ($) {
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my($html) = @_;
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my $charset = guesscharset($html);
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return defined $charset? "text/html; charset=$charset": "text/html";
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}
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=item output_html_with_http_headers
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&output_html_with_http_headers($query, $cookie, $html)
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Outputs the HTML page $html with the appropriate HTTP headers,
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with the authentication cookie $cookie and a Content-Type that
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corresponds to the HTML page $html.
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=cut
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sub output_html_with_http_headers ($$$) {
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my($query, $cookie, $html) = @_;
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print $query->header(
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-type => guesstype($html),
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-cookie => $cookie,
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), $html;
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}
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#---------------------------------
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END { } # module clean-up code here (global destructor)
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1;
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__END__
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=back
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=head1 AUTHOR
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Koha Developement team <info@koha.org>
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=cut
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