IkiWiki/Plugin/attachment.pm

   1 #!/usr/bin/perl
   2 package IkiWiki::Plugin::attachment;
   3
   4 use warnings;
   5 use strict;
   6 use IkiWiki 3.00;
   7
   8 sub import {
   9         add_underlay("javascript");
  10         hook(type => "getsetup", id => "attachment", call => \&getsetup);
  11         hook(type => "checkconfig", id => "attachment", call => \&checkconfig);
  12         hook(type => "formbuilder_setup", id => "attachment", call => \&formbuilder_setup);
  13         hook(type => "formbuilder", id => "attachment", call => \&formbuilder);
  14         IkiWiki::loadplugin("filecheck");
  15 }
  16
  17 sub getsetup () {
  18         return
  19                 plugin => {
  20                         safe => 1,
  21                         rebuild => 0,
  22                         section => "web",
  23                 },
  24                 allowed_attachments => {
  25                         type => "pagespec",
  26                         example => "virusfree() and mimetype(image/*) and maxsize(50kb)",
  27                         description => "enhanced PageSpec specifying what attachments are allowed",
  28                         link => "ikiwiki/PageSpec/attachment",
  29                         safe => 1,
  30                         rebuild => 0,
  31                 },
  32                 virus_checker => {
  33                         type => "string",
  34                         example => "clamdscan -",
  35                         description => "virus checker program (reads STDIN, returns nonzero if virus found)",
  36                         safe => 0, # executed
  37                         rebuild => 0,
  38                 },
  39 }
  40
  41 sub check_canattach ($$;$) {
  42         my $session=shift;
  43         my $dest=shift; # where it's going to be put, under the srcdir
  44         my $file=shift; # the path to the attachment currently
  45
  46         # Don't allow an attachment to be uploaded with the same name as an
  47         # existing page.
  48         if (exists $IkiWiki::pagesources{$dest} &&
  49             $IkiWiki::pagesources{$dest} ne $dest) {
  50                 error(sprintf(gettext("there is already a page named %s"), $dest));
  51         }
  52
  53         # Use a special pagespec to test that the attachment is valid.
  54         my $allowed=1;
  55         if (defined $config{allowed_attachments} &&
  56             length $config{allowed_attachments}) {
  57                 $allowed=pagespec_match($dest,
  58                         $config{allowed_attachments},
  59                         file => $file,
  60                         user => $session->param("name"),
  61                         ip => $session->remote_addr(),
  62                 );
  63         }
  64
  65         if (! $allowed) {
  66                 error(gettext("prohibited by allowed_attachments")." ($allowed)");
  67         }
  68         else {
  69                 return 1;
  70         }
  71 }
  72
  73 sub checkconfig () {
  74         $config{cgi_disable_uploads}=0;
  75 }
  76
  77 sub formbuilder_setup (@) {
  78         my %params=@_;
  79         my $form=$params{form};
  80         my $q=$params{cgi};
  81
  82         if (defined $form->field("do") && ($form->field("do") eq "edit" ||
  83             $form->field("do") eq "create")) {
  84                 # Add attachment field, set type to multipart.
  85                 $form->enctype(&CGI::MULTIPART);
  86                 $form->field(name => 'attachment', type => 'file');
  87                 # These buttons are not put in the usual place, so
  88                 # are not added to the normal formbuilder button list.
  89                 $form->tmpl_param("field-upload" => '<input name="_submit" type="submit" value="Upload Attachment" />');
  90                 $form->tmpl_param("field-link" => '<input name="_submit" type="submit" value="Insert Links" />');
  91
  92                 # Add the toggle javascript; the attachments interface uses
  93                 # it to toggle visibility.
  94                 require IkiWiki::Plugin::toggle;
  95                 $form->tmpl_param("javascript" => IkiWiki::Plugin::toggle::include_javascript($params{page}, 1));
  96                 # Start with the attachments interface toggled invisible,
  97                 # but if it was used, keep it open.
  98                 if ($form->submitted ne "Upload Attachment" &&
  99                     (! defined $q->param("attachment_select") ||
 100                     ! length $q->param("attachment_select"))) {
 101                         $form->tmpl_param("attachments-class" => "toggleable");
 102                 }
 103                 else {
 104                         $form->tmpl_param("attachments-class" => "toggleable-open");
 105                 }
 106         }
 107 }
 108
 109 sub formbuilder (@) {
 110         my %params=@_;
 111         my $form=$params{form};
 112         my $q=$params{cgi};
 113
 114         return if ! defined $form->field("do") || ($form->field("do") ne "edit" && $form->field("do") ne "create") ;
 115
 116         my $filename=Encode::decode_utf8($q->param('attachment'));
 117         if (defined $filename && length $filename &&
 118             ($form->submitted eq "Upload Attachment" || $form->submitted eq "Save Page")) {
 119                 my $session=$params{session};
 120
 121                 # This is an (apparently undocumented) way to get the name
 122                 # of the temp file that CGI writes the upload to.
 123                 my $tempfile=$q->tmpFileName($filename);
 124                 if (! defined $tempfile || ! length $tempfile) {
 125                         # perl 5.8 needs an alternative, awful method
 126                         if ($q =~ /HASH/ && exists $q->{'.tmpfiles'}) {
 127                                 foreach my $key (keys(%{$q->{'.tmpfiles'}})) {
 128                                         $tempfile=$q->tmpFileName(\$key);
 129                                         last if defined $tempfile && length $tempfile;
 130                                 }
 131                         }
 132                         if (! defined $tempfile || ! length $tempfile) {
 133                                 error("CGI::tmpFileName failed to return the uploaded file name");
 134                         }
 135                 }
 136
 137                 $filename=IkiWiki::basename($filename);
 138                 $filename=~s/.*\\+(.+)/$1/; # hello, windows
 139
 140                 $filename=linkpage(IkiWiki::possibly_foolish_untaint(
 141                                 attachment_location($form->field('page')).
 142                                 $filename));
 143                 if (IkiWiki::file_pruned($filename)) {
 144                         error(gettext("bad attachment filename"));
 145                 }
 146
 147                 # Check that the user is allowed to edit a page with the
 148                 # name of the attachment.
 149                 IkiWiki::check_canedit($filename, $q, $session, 1);
 150                 # And that the attachment itself is acceptable.
 151                 check_canattach($session, $filename, $tempfile);
 152
 153                 # Needed for fast_file_copy and for rendering below.
 154                 require IkiWiki::Render;
 155
 156                 # Move the attachment into place.
 157                 # Try to use a fast rename; fall back to copying.
 158                 IkiWiki::prep_writefile($filename, $config{srcdir});
 159                 unlink($config{srcdir}."/".$filename);
 160                 if (rename($tempfile, $config{srcdir}."/".$filename)) {
 161                         # The temp file has tight permissions; loosen up.
 162                         chmod(0666 & ~umask, $config{srcdir}."/".$filename);
 163                 }
 164                 else {
 165                         my $fh=$q->upload('attachment');
 166                         if (! defined $fh || ! ref $fh) {
 167                                 # needed by old CGI versions
 168                                 $fh=$q->param('attachment');
 169                                 if (! defined $fh || ! ref $fh) {
 170                                         # even that doesn't always work,
 171                                         # fall back to opening the tempfile
 172                                         $fh=undef;
 173                                         open($fh, "<", $tempfile) || error("failed to open \"$tempfile\": $!");
 174                                 }
 175                         }
 176                         binmode($fh);
 177                         writefile($filename, $config{srcdir}, undef, 1, sub {
 178                                 IkiWiki::fast_file_copy($tempfile, $filename, $fh, @_);
 179                         });
 180                 }
 181
 182                 # Check the attachment in and trigger a wiki refresh.
 183                 if ($config{rcs}) {
 184                         IkiWiki::rcs_add($filename);
 185                         IkiWiki::disable_commit_hook();
 186                         IkiWiki::rcs_commit(
 187                                 file => $filename,
 188                                 message => gettext("attachment upload"),
 189                                 token => IkiWiki::rcs_prepedit($filename),
 190                                 session => $session,
 191                         );
 192                         IkiWiki::enable_commit_hook();
 193                         IkiWiki::rcs_update();
 194                 }
 195                 IkiWiki::refresh();
 196                 IkiWiki::saveindex();
 197         }
 198         elsif ($form->submitted eq "Insert Links") {
 199                 my $page=quotemeta(Encode::decode_utf8($q->param("page")));
 200                 my $add="";
 201                 foreach my $f ($q->param("attachment_select")) {
 202                         $f=Encode::decode_utf8($f);
 203                         $f=~s/^$page\///;
 204                         if (IkiWiki::isinlinableimage($f) &&
 205                             UNIVERSAL::can("IkiWiki::Plugin::img", "import")) {
 206                                 $add.='[[!img '.$f.' align="right" size="" alt=""]]';
 207                         }
 208                         else {
 209                                 $add.="[[$f]]";
 210                         }
 211                         $add.="\n";
 212                 }
 213                 $form->field(name => 'editcontent',
 214                         value => $form->field('editcontent')."\n\n".$add,
 215                         force => 1) if length $add;
 216         }
 217
 218         # Generate the attachment list only after having added any new
 219         # attachments.
 220         $form->tmpl_param("attachment_list" => [attachment_list($form->field('page'))]);
 221 }
 222
 223 sub attachment_location ($) {
 224         my $page=shift;
 225
 226         # Put the attachment in a subdir of the page it's attached
 227         # to, unless that page is an "index" page.
 228         $page=~s/(^|\/)index//;
 229         $page.="/" if length $page;
 230
 231         return $page;
 232 }
 233
 234 sub attachment_list ($) {
 235         my $page=shift;
 236         my $loc=attachment_location($page);
 237
 238         my @ret;
 239         foreach my $f (values %pagesources) {
 240                 if (! defined pagetype($f) &&
 241                     $f=~m/^\Q$loc\E[^\/]+$/) {
 242                         push @ret, {
 243                                 "field-select" => '<input type="checkbox" name="attachment_select" value="'.$f.'" />',
 244                                 link => htmllink($page, $page, $f, noimageinline => 1),
 245                                 size => IkiWiki::Plugin::filecheck::humansize((stat(_))[7]),
 246                                 mtime => displaytime($IkiWiki::pagemtime{$f}),
 247                                 mtime_raw => $IkiWiki::pagemtime{$f},
 248                         };
 249                 }
 250         }
 251
 252         # Sort newer attachments to the top of the list, so a newly-added
 253         # attachment appears just before the form used to add it.
 254         return sort { $b->{mtime_raw} <=> $a->{mtime_raw} || $a->{link} cmp $b->{link} } @ret;
 255 }
 256
 257 1