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 (!ispage() 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                 # XXX Put the attachment in a subdir corresponding to the
  53                 # page being edited.
  54                 # The editpage code has already checked that
  55                 # $form->field('page') is valid.
  56                 $filename="XXX/$filename";
  57
  58                 # Use a pagespec to test that the attachment is valid.
  59                 if (exists $config{valid_attachments} &&
  60                     length $config{valid_attachments}) {
  61                         my $result=pagespec_match($filename, $config{valid_attachments},
  62                                 file => $tempfile);
  63                         if (! $result) {
  64                                 error(gettext("attachment rejected")." ($result)");
  65                         }
  66                 }
  67
  68                 # Also check that the user is allowed to edit it by other
  69                 # policies.
  70                 IkiWiki::check_canedit($filename, $q, $params{session}, 1);
  71
  72                 # Move the attachment into place.
  73                 # Try to use a fast rename; fall back to copying.
  74                 prep_writefile($filename, $config{srcdir});
  75                 unlink($config{srcdir}."/".$filename);
  76                 if (! rename($tempfile, $config{srcdir}."/".$filename)) {
  77                         my $fh=$q->upload('attachment');
  78                         if (! defined $fh || ! ref $fh) {
  79                                 error("failed to get filehandle");
  80                         }
  81                         binmode($fh);
  82                         writefile($filename, $config{srcdir}, undef, 1, sub {
  83                                 IkiWiki::fast_file_copy($tempfile, $filename, $fh, @_);
  84                         });
  85                 }
  86
  87                 # TODO add to vcs
  88
  89                 # TODO trigger a wiki build if there's no vcs
  90         }
  91 } # }}}
  92
  93 package IkiWiki::PageSpec;
  94
  95 sub parsesize { #{{{
  96         my $size=shift;
  97         no warnings;
  98         my $base=$size+0; # force to number
  99         use warnings;
 100         my $multiple=1;
 101         if ($size=~/kb?$/i) {
 102                 $multiple=2**10;
 103         }
 104         elsif ($size=~/mb?$/i) {
 105                 $multiple=2**20;
 106         }
 107         elsif ($size=~/gb?$/i) {
 108                 $multiple=2**30;
 109         }
 110         elsif ($size=~/tb?$/i) {
 111                 $multiple=2**40;
 112         }
 113         return $base * $multiple;
 114 } #}}}
 115
 116 sub match_maxsize ($$;@) { #{{{
 117         shift;
 118         my $maxsize=eval{parsesize(shift)};
 119         if ($@) {
 120                 return IkiWiki::FailReason->new("unable to parse maxsize (or number too large)");
 121         }
 122
 123         my %params=@_;
 124         if (! exists $params{file}) {
 125                 return IkiWiki::FailReason->new("no file specified");
 126         }
 127
 128         if (-s $params{file} > $maxsize) {
 129                 return IkiWiki::FailReason->new("file too large");
 130         }
 131         else {
 132                 return IkiWiki::SuccessReason->new("file not too large");
 133         }
 134 } #}}}
 135
 136 sub match_minsize ($$;@) { #{{{
 137         shift;
 138         my $minsize=eval{parsesize(shift)};
 139         if ($@) {
 140                 return IkiWiki::FailReason->new("unable to parse minsize (or number too large)");
 141         }
 142
 143         my %params=@_;
 144         if (! exists $params{file}) {
 145                 return IkiWiki::FailReason->new("no file specified");
 146         }
 147
 148         if (-s $params{file} < $minsize) {
 149                 return IkiWiki::FailReason->new("file too small");
 150         }
 151         else {
 152                 return IkiWiki::SuccessReason->new("file not too small");
 153         }
 154 } #}}}
 155
 156 sub match_ispage ($$;@) { #{{{
 157         my $filename=shift;
 158
 159         if (defined IkiWiki::pagetype($filename)) {
 160                 return IkiWiki::SuccessReason->new("file is a wiki page");
 161         }
 162         else {
 163                 return IkiWiki::FailReason->new("file is not a wiki page");
 164         }
 165 } #}}}
 166
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