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   1 #!/usr/bin/perl
   2 package IkiWiki::Plugin::blogspam;
   3
   4 use warnings;
   5 use strict;
   6 use IkiWiki 3.00;
   7
   8 my $defaulturl='http://test.blogspam.net:8888/';
   9
  10 sub import {
  11         hook(type => "getsetup", id => "blogspam",  call => \&getsetup);
  12         hook(type => "checkcontent", id => "blogspam", call => \&checkcontent);
  13 }
  14
  15 sub getsetup () {
  16         return
  17                 plugin => {
  18                         safe => 1,
  19                         rebuild => 0,
  20                 },
  21                 blogspam_pagespec => {
  22                         type => 'pagespec',
  23                         example => 'postcomment(*)',
  24                         description => 'PageSpec of pages to check for spam',
  25                         link => 'ikiwiki/PageSpec',
  26                         safe => 1,
  27                         rebuild => 0,
  28                 },
  29                 blogspam_options => {
  30                         type => "string",
  31                         example => "blacklist=1.2.3.4,blacklist=8.7.6.5,max-links=10",
  32                         description => "options to send to blogspam server",
  33                         link => "http://blogspam.net/api/testComment.html#options",
  34                         safe => 1,
  35                         rebuild => 0,
  36                 },
  37                 blogspam_server => {
  38                         type => "string",
  39                         default => $defaulturl,
  40                         description => "blogspam server XML-RPC url",
  41                         safe => 1,
  42                         rebuild => 0,
  43                 },
  44 }
  45
  46 sub checkcontent (@) {
  47         my %params=@_;
  48
  49         eval q{
  50                 use RPC::XML;
  51                 use RPC::XML::Client;
  52         };
  53         if ($@) {
  54                 warn($@);
  55                 return undef;
  56         }
  57
  58         if (exists $config{blogspam_pagespec}) {
  59                 return undef
  60                         if ! pagespec_match($params{page}, $config{blogspam_pagespec},
  61                                 location => $params{page});
  62         }
  63
  64         my $url=$defaulturl;
  65         $url = $config{blogspam_server} if exists $config{blogspam_server};
  66         my $client = RPC::XML::Client->new($url);
  67
  68         my @options = split(",", $config{blogspam_options})
  69                 if exists $config{blogspam_options};
  70
  71         # Allow short comments and whitespace-only edits, unless the user
  72         # has overridden min-words themselves.
  73         push @options, "min-words=0"
  74                 unless grep /^min-words=/i, @options;
  75         # Wiki pages can have a lot of urls, unless the user specifically
  76         # wants to limit them.
  77         push @options, "exclude=lotsaurls"
  78                 unless grep /^max-links/i, @options;
  79         # Unless the user specified a size check, disable such checking.
  80         push @options, "exclude=size"
  81                 unless grep /^(?:max|min)-size/i, @options;
  82         # This test has absurd false positives on words like "alpha"
  83         # and "buy".
  84         push @options, "exclude=stopwords";
  85
  86         my %req=(
  87                 ip => $ENV{REMOTE_ADDR},
  88                 comment => $params{content},
  89                 subject => defined $params{subject} ? $params{subject} : "",
  90                 name => defined $params{author} ? $params{author} : "",
  91                 link => exists $params{url} ? $params{url} : "",
  92                 options => join(",", @options),
  93                 site => $config{url},
  94                 version => "ikiwiki ".$IkiWiki::version,
  95         );
  96         my $res = $client->send_request('testComment', \%req);
  97
  98         if (! ref $res || ! defined $res->value) {
  99                 debug("failed to get response from blogspam server ($url)");
 100                 return undef;
 101         }
 102         elsif ($res->value =~ /^SPAM:(.*)/) {
 103                 eval q{use Data::Dumper};
 104                 debug("blogspam server reports ".$res->value.": ".Dumper(\%req));
 105                 return gettext("Sorry, but that looks like spam to <a href=\"http://blogspam.net/\">blogspam</a>: ").$1;
 106         }
 107         elsif ($res->value ne 'OK') {
 108                 debug("blogspam server failure: ".$res->value);
 109                 return undef;
 110         }
 111         else {
 112                 return undef;
 113         }
 114 }
 115
 116 1