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oddmuse/contrib/info-ref
Alex Schroeder 2c3abffd2e Removed $Id$ from info-ref.
2013-01-12 23:50:11 +01:00

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#!/usr/bin/perl
# Copyright (C) 2005, 2006, 2007, 2012 Alex Schroeder <alex@gnu.org>
#
# This program is free software: you can redistribute it and/or modify it under
# the terms of the GNU General Public License as published by the Free Software
# Foundation, either version 3 of the License, or (at your option) any later
# version.
#
# This program is distributed in the hope that it will be useful, but WITHOUT
# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
# FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License along with
# this program. If not, see <http://www.gnu.org/licenses/>.
use strict;
use warnings;
use CGI ;
use CGI::Carp qw(fatalsToBrowser);
use LWP::UserAgent;
use XML::LibXML;
use URI;
my %indexes = (
'http://www.gnu.org/software/emacs/manual/html_node/emacs/Command-Index.html'
=> 'GNU Emacs manual, Command and Function Index',
'http://www.gnu.org/software/emacs/manual/html_node/emacs/Variable-Index.html'
=> 'GNU Emacs manual, Variable Index',
'http://www.gnu.org/software/emacs/manual/html_node/emacs/Concept-Index.html'
=> 'GNU Emacs manual, Concept Index',
'http://www.gnu.org/software/emacs/manual/html_node/emacs/index.html'
=> 'GNU Emacs manual, Top Menu',
'http://www.gnu.org/software/emacs/manual/html_node/elisp/Index.html'
=> 'GNU Emacs Lisp reference manual, Index',
'http://www.gnu.org/software/emacs/manual/html_node/elisp/index.html'
=> 'GNU Emacs Lisp reference manual, Top Menu',
'http://www.gnu.org/software/emacs/manual/html_node/message/Index.html'
=> 'Message Manual, Index',
'http://www.gnu.org/software/emacs/manual/html_node/gnus/Index.html'
=> 'The Gnus Newsreader, Index',
'http://www.gnu.org/software/emacs/manual/html_node/cl/Function-Index.html'
=> 'Common Lisp Extensions, Function Index',
'http://www.gnu.org/software/emacs/manual/html_node/ccmode/Variable-Index.html'
=> 'CC Mode Manual, Variable Index',
'http://www.gnu.org/software/emacs/manual/html_node/ccmode/Concept-and-Key-Index.html'
=> 'CC Mode Manual, Command and Function Index',
'http://www.gnu.org/software/emacs/manual/html_node/org/Index.html'
=> 'Org Mode Manual, Index',
'http://www.gnu.org/software/auctex/manual/auctex/Function-Index.html'
=> 'AUCTeX Manual, Function Index',
'http://www.gnu.org/software/auctex/manual/auctex/Variable-Index.html'
=> 'AUCTeX Manual, Variable Index',
'http://www.gnu.org/software/auctex/manual/auctex/Concept-Index.html'
=> 'AUCTeX Manual, Concept Index',
'http://www.gnu.org/software/texinfo/manual/texinfo/html_node/index.html'
=> 'Texinfo, Command and Variable Index',
'http://www.gnu.org/software/texinfo/manual/texinfo/html_node/General-Index.html'
=> 'Texinfo, General Index',
'http://www.gnu.org/software/texinfo/manual/info/html_node/Index.html'
=> 'Info, Index',
'http://www.gnu.org/software/emacs/manual/html_node/dired-x/Command-Index.html'
=> 'Dired Extra, Function Index',
'http://www.gnu.org/software/emacs/manual/html_node/dired-x/Variable-Index.html'
=> 'Dired Extra, Variable Index',
'http://www.gnu.org/software/coreutils/manual/html_node/Concept-index.html'
=> 'Coreutils, Index',
'http://www.gnu.org/software/diffutils/manual/html_node/Index.html'
=> 'Diffutils, Index',
'http://www.gnu.org/software/findutils/manual/html_node/find_html/Primary-Index.html'
=> 'Findutils, Primary Index',
'http://www.gnu.org/software/emacs/manual/html_node/ediff/Index.html'
=> 'Edfiff, Index',
);
my $db = '/org/org.emacswiki/htdocs/emacs/info-ref.dat';
my $nl = "\n";
my $fs = "\023";
my $gs = "\024";
my $rs = "\025";
my $q = new CGI;
ProcessRequest();
sub ProcessRequest {
if ($q->param('init')) {
Initialize();
} elsif ($q->param('find')) {
Find($q->param('find'));
} else {
ShowForm();
}
}
sub ShowForm {
print $q->header, $q->start_html,
$q->start_form, "Index entry: ", $q->textfield('find'), $q->submit, $q->end_form,
$q->p($q->a({-href=>"http://www.emacswiki.org/scripts/info-ref"}, "Source"), $q->br(),
'Last DB update: ', TimeToText((stat($db))[9]),
' (' . $q->a({-href=>$q->url . '?init=1'}, "update") . ')'),
$q->end_html;
}
sub Find {
my $str = shift;
my %map = ();
my $data = ReadFileOrDie($db);
foreach my $line (split(/$nl/, $data)) {
my ($key, $rest) = split(/$fs/, $line);
$map{$key} = ();
if ($rest) {
foreach my $a (split(/$gs/, $rest)) {
my ($link, $label) = split(/$rs/, $a);
$map{$key}{$link} = $label;
}
}
}
my @links = keys %{$map{$str}};
if ($#links < 0) {
ReportError("No matches found for '$str'", '404 Not Found');
} elsif ($#links == 0) {
print $q->redirect($links[0]);
} else {
my @list = map { $q->a({-href=>$_}, $map{$str}{$_}) } @links;
print $q->header, $q->h1($str), $q->ol($q->li(\@list));
}
}
sub Initialize {
my %map = ();
print $q->header, $q->start_html;
foreach my $url (keys %indexes) {
print $q->p($url);;
# determine base URI
my $base = URI->new($url);
# fetch and parse data
my $data = GetRaw($url);
# some markup fixes for the elisp manual
# $data =~ s/&([<"])/&amp;$1/g;
# $data =~ s/<([<"])/&lt;$1/g;
# $data =~ s/="fn_"">/="fn_&quot;">/;
# $data =~ s/<!DOCTYPE.*?>//;
# $data =~ s'</?font.*?>''gi;
# $data =~ s'</table><br></P>'</table><br>';
my $parser = XML::LibXML->new();
my $doc;
eval { $doc = $parser->parse_html_string($data); };
print $q->p($@) if $@;
next if $@;
my @nodelist = $doc->findnodes('/html/body/ul/li/a');
foreach my $node (@nodelist) {
my $key = $node->textContent;
my $href = $node->getAttribute('href');
my $link = URI->new_abs($href, $base);
# print "$key -> $label $l\n";
$map{$key} = () unless $map{$key};
$map{$key}{$link->canonical} = $indexes{$url};
}
# elisp manual
# @nodelist = $doc->findnodes('descendant::table[position()=3]/descendant::tr');
# foreach my $node (@nodelist) {
# my ($item, $section) = $node->findnodes('td/a');
# next unless $item and $section;
# my $key = $item->textContent;
# my $label = $section->textContent;
# my $link = $item->getAttribute('href');
# my $l = URI->new_abs($link, $base);
# # print "$key -> $label $l\n";
# $map{$key} = () unless $map{$key};
# $map{$key}{$l->canonical} = $label;
# }
}
my $data = join($nl, map {
my $key = $_;
$key . $fs . join($gs, map {
my $link = $_;
join($rs, $link, $map{$key}{$link});
} keys %{$map{$_}})
} keys %map);
WriteStringToFile($db, $data);
print $q->p('Database initialized'), $q->end_html;
}
sub GetRaw {
my $uri = shift;
return unless eval { require LWP::UserAgent; };
my $ua = LWP::UserAgent->new;
my $response = $ua->get($uri);
return $response->decoded_content;
}
sub ReadFile {
my ($filename) = @_;
my ($data);
local $/ = undef; # Read complete files
if (open(IN, "<$filename")) {
$data=<IN>;
close IN;
return (1, $data);
}
return (0, '');
}
sub ReadFileOrDie {
my ($filename) = @_;
my ($status, $data);
($status, $data) = ReadFile($filename);
if (!$status) {
ReportError("Cannot open $filename: $!", '500 Internal Server Error');
}
return $data;
}
sub WriteStringToFile {
my ($file, $string) = @_;
open(OUT, ">$file")
or ReportError("Cannot write $file: $!", '500 Internal Server Error');
print OUT $string;
close(OUT);
}
sub ReportError { # fatal!
my ($errmsg, $status, $log) = @_;
print $q->header(-status => $status);
print $q->start_html, $q->h2($errmsg), $q->end_html;
exit (1);
}
sub CalcDay {
my ($sec, $min, $hour, $mday, $mon, $year) = gmtime(shift);
return sprintf('%4d-%02d-%02d', $year+1900, $mon+1, $mday);
}
sub CalcTime {
my ($sec, $min, $hour, $mday, $mon, $year) = gmtime(shift);
return sprintf('%02d:%02d UTC', $hour, $min);
}
sub TimeToText {
my $t = shift;
return CalcDay($t) . ' ' . CalcTime($t);
}
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