IkiWiki/Plugin/attachment.pm

   1 #!/usr/bin/perl
   2 package IkiWiki::Plugin::attachment;
   3
   4 use warnings;
   5 use strict;
   6 use IkiWiki 2.00;
   7 use CGI;
   8 $CGI::DISABLE_UPLOADS=0;
   9
  10 # TODO move to admin prefs
  11 $config{valid_attachments}="(*.mp3 and maxsize(15mb)) or (* and maxsize(50kb))";
  12
  13 sub import { #{{{
  14         hook(type => "formbuilder_setup", id => "attachment", call => \&formbuilder_setup);
  15         hook(type => "formbuilder", id => "attachment", call => \&formbuilder);
  16 } # }}}
  17
  18 sub formbuilder_setup { #{{{
  19         my %params=@_;
  20         my $form=$params{form};
  21
  22         return if $form->field("do") ne "edit";
  23
  24         $form->field(name => 'attachment', type => 'file');
  25 } #}}}
  26
  27 sub formbuilder (@) { #{{{
  28         my %params=@_;
  29         my $form=$params{form};
  30
  31         return if $form->field("do") ne "edit";
  32
  33         if ($form->submitted eq "Upload") {
  34                 my $q=$params{cgi};
  35                 my $filename=IkiWiki::basename($q->param('attachment'));
  36                 if (! defined $filename || ! length $filename) {
  37                         # no file, so do nothing
  38                         return;
  39                 }
  40
  41                 # This is an (apparently undocumented) way to get the name
  42                 # of the temp file that CGI writes the upload to.
  43                 my $tempfile=$q->tmpFileName($filename);
  44
  45                 # To untaint the filename, escape any hazardous characters,
  46                 # and make sure it isn't pruned.
  47                 $filename=IkiWiki::possibly_foolish_untaint(IkiWiki::titlepage($filename));
  48                 if (IkiWiki::file_pruned($filename, $config{srcdir})) {
  49                         error(gettext("bad attachment filename"));
  50                 }
  51
  52                 # Use a pagespec to test that the attachment is valid.
  53                 if (exists $config{valid_attachments} &&
  54                     length $config{valid_attachments}) {
  55                         my $result=pagespec_match($filename, $config{valid_attachments},
  56                                 tempfile => $tempfile);
  57                         if (! $result) {
  58                                 error(gettext("attachment rejected")." ($result)");
  59                         }
  60                 }
  61
  62                 my $fh=$q->upload('attachment');
  63                 if (! defined $fh || ! ref $fh) {
  64                         error("failed to get filehandle");
  65                 }
  66                 binmode($fh);
  67                 while (<$fh>) {
  68                         print STDERR $_."\n";
  69                 }
  70         }
  71 } # }}}
  72
  73 package IkiWiki::PageSpec;
  74
  75 sub parsesize { #{{{
  76         my $size=shift;
  77         no warnings;
  78         my $base=$size+0; # force to number
  79         use warnings;
  80         my $multiple=1;
  81         if ($size=~/kb?$/i) {
  82                 $multiple=2**10;
  83         }
  84         elsif ($size=~/mb?$/i) {
  85                 $multiple=2**20;
  86         }
  87         elsif ($size=~/gb?$/i) {
  88                 $multiple=2**30;
  89         }
  90         elsif ($size=~/tb?$/i) {
  91                 $multiple=2**40;
  92         }
  93         return $base * $multiple;
  94 } #}}}
  95
  96 sub match_maxsize ($$;@) { #{{{
  97         shift;
  98         my $maxsize=eval{parsesize(shift)};
  99         if ($@) {
 100                 return IkiWiki::FailReason->new("unable to parse maxsize (or number too large)");
 101         }
 102
 103         my %params=@_;
 104         if (! exists $params{tempfile}) {
 105                 return IkiWiki::FailReason->new("no tempfile specified");
 106         }
 107
 108         if (-s $params{tempfile} > $maxsize) {
 109                 return IkiWiki::FailReason->new("attachment too large");
 110         }
 111         else {
 112                 return IkiWiki::SuccessReason->new("attachment size ok");
 113         }
 114 } #}}}
 115
 116 sub match_minsize ($$;@) { #{{{
 117         shift;
 118         my $minsize=eval{parsesize(shift)};
 119         if ($@) {
 120                 return IkiWiki::FailReason->new("unable to parse minsize (or number too large)");
 121         }
 122
 123         my %params=@_;
 124         if (! exists $params{tempfile}) {
 125                 return IkiWiki::FailReason->new("no tempfile specified");
 126         }
 127
 128         if (-s $params{tempfile} < $minsize) {
 129                 return IkiWiki::FailReason->new("attachment too small");
 130         }
 131         else {
 132                 return IkiWiki::SuccessReason->new("attachment size ok");
 133         }
 134 } #}}}
 135
 136 1