1#!/usr/bin/perl
2package IkiWiki::Plugin::blogspam;
3
4use warnings;
5use strict;
6use IkiWiki 3.00;
7use Encode;
8
9my $defaulturl='http://test.blogspam.net:9999/';
10my $client;
11
12sub import {
13	hook(type => "getsetup", id => "blogspam",  call => \&getsetup);
14	hook(type => "checkconfig", id => "blogspam", call => \&checkconfig);
15	hook(type => "checkcontent", id => "blogspam", call => \&checkcontent);
16}
17
18sub getsetup () {
19	return
20		plugin => {
21			safe => 1,
22			rebuild => 0,
23			section => "auth",
24		},
25		blogspam_pagespec => {
26			type => 'pagespec',
27			example => 'postcomment(*)',
28			description => 'PageSpec of pages to check for spam',
29			link => 'ikiwiki/PageSpec',
30			safe => 1,
31			rebuild => 0,
32		},
33		blogspam_options => {
34			type => "string",
35			example => "blacklist=1.2.3.4,blacklist=8.7.6.5,max-links=10",
36			description => "options to send to blogspam server",
37			link => "http://blogspam.net/api/2.0/testComment.html#options",
38			safe => 1,
39			rebuild => 0,
40		},
41		blogspam_server => {
42			type => "string",
43			default => $defaulturl,
44			description => "blogspam server JSON url",
45			safe => 1,
46			rebuild => 0,
47		},
48}
49
50sub checkconfig () {
51	# This is done at checkconfig time because printing an error
52	# if the module is missing when a spam is posted would not
53	# let the admin know about the problem.
54	eval q{
55		use JSON;
56		use HTTP::Request;
57	};
58	error $@ if $@;
59
60	# Using the for_url parameter makes sure we crash if used
61	# with an older IkiWiki.pm that didn't automatically try
62	# to use LWPx::ParanoidAgent.
63	$client=useragent(for_url => $config{blogspam_server});
64}
65
66sub checkcontent (@) {
67	my %params=@_;
68	my $session=$params{session};
69
70	my $spec='!admin()';
71 	if (exists $config{blogspam_pagespec} &&
72	    length $config{blogspam_pagespec}) {
73		$spec.=" and (".$config{blogspam_pagespec}.")";
74	}
75
76	my $user=$session->param("name");
77	return undef unless pagespec_match($params{page}, $spec,
78		(defined $user ? (user => $user) : ()),
79		(defined $session->remote_addr() ? (ip => $session->remote_addr()) : ()),
80		location => $params{page});
81
82	my $url=$defaulturl;
83	$url = $config{blogspam_server} if exists $config{blogspam_server};
84
85	my @options = split(",", $config{blogspam_options})
86		if exists $config{blogspam_options};
87
88	# Allow short comments and whitespace-only edits, unless the user
89	# has overridden min-words themselves.
90	push @options, "min-words=0"
91		unless grep /^min-words=/i, @options;
92	# Wiki pages can have a lot of urls, unless the user specifically
93	# wants to limit them.
94	push @options, "exclude=lotsaurls"
95		unless grep /^max-links/i, @options;
96	# Unless the user specified a size check, disable such checking.
97	push @options, "exclude=size"
98		unless grep /^(?:max|min)-size/i, @options;
99	# This test has absurd false positives on words like "alpha"
100	# and "buy".
101	push @options, "exclude=stopwords";
102
103	my %req=(
104		ip => $session->remote_addr(),
105		comment => encode_utf8(defined $params{diff} ? $params{diff} : $params{content}),
106		subject => encode_utf8(defined $params{subject} ? $params{subject} : ""),
107		name => encode_utf8(defined $params{author} ? $params{author} : ""),
108		link => encode_utf8(exists $params{url} ? $params{url} : ""),
109		options => join(",", @options),
110		site => encode_utf8($config{url}),
111		version => "ikiwiki ".$IkiWiki::version,
112	);
113	eval q{use JSON; use HTTP::Request}; # errors handled in checkconfig()
114	my $res = $client->request(
115		HTTP::Request->new(
116			'POST',
117			$url,
118			[ 'Content-Type' => 'application/json' ],
119			to_json(\%req),
120		),
121	);
122
123	if (! ref $res || ! $res->is_success()) {
124		debug("failed to get response from blogspam server ($url)");
125		return undef;
126	}
127	my $details = from_json($res->content);
128	if ($details->{result} eq 'SPAM') {
129		eval q{use Data::Dumper};
130		debug("blogspam server reports $details->{reason}: ".Dumper(\%req));
131		return gettext("Sorry, but that looks like spam to <a href=\"http://blogspam.net/\">blogspam</a>: ").$details->{reason};
132	}
133	elsif ($details->{result} ne 'OK') {
134		debug("blogspam server failure: ".$res->content);
135		return undef;
136	}
137	else {
138		return undef;
139	}
140}
141
1421
143