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
   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                 },
  23                 allowed_attachments => {
  24                         type => "pagespec",
  25                         example => "virusfree() and mimetype(image/*) and maxsize(50kb)",
  26                         description => "enhanced PageSpec specifying what attachments are allowed",
  27                         link => "ikiwiki/PageSpec/attachment",
  28                         safe => 1,
  29                         rebuild => 0,
  30                 },
  31                 virus_checker => {
  32                         type => "string",
  33                         example => "clamdscan -",
  34                         description => "virus checker program (reads STDIN, returns nonzero if virus found)",
  35                         safe => 0, # executed
  36                         rebuild => 0,
  37                 },
  38 }
  39
  40 sub check_canattach ($$;$) {
  41         my $session=shift;
  42         my $dest=shift; # where it's going to be put, under the srcdir
  43         my $file=shift; # the path to the attachment currently
  44
  45         # Don't allow an attachment to be uploaded with the same name as an
  46         # existing page.
  47         if (exists $IkiWiki::pagesources{$dest} &&
  48             $IkiWiki::pagesources{$dest} ne $dest) {
  49                 error(sprintf(gettext("there is already a page named %s"), $dest));
  50         }
  51
  52         # Use a special pagespec to test that the attachment is valid.
  53         my $allowed=1;
  54         if (defined $config{allowed_attachments} &&
  55             length $config{allowed_attachments}) {
  56                 $allowed=pagespec_match($dest,
  57                         $config{allowed_attachments},
  58                         file => $file,
  59                         user => $session->param("name"),
  60                         ip => $ENV{REMOTE_ADDR},
  61                 );
  62         }
  63
  64         # XXX deprecated, should be removed eventually
  65         if ($allowed) {
  66                 foreach my $admin (@{$config{adminuser}}) {
  67                         my $allowed_attachments=IkiWiki::userinfo_get($admin, "allowed_attachments");
  68                         if (defined $allowed_attachments &&
  69                             length $allowed_attachments) {
  70                                 $allowed=pagespec_match($dest,
  71                                         $allowed_attachments,
  72                                         file => $file,
  73                                         user => $session->param("name"),
  74                                         ip => $ENV{REMOTE_ADDR},
  75                                 );
  76                                 last if $allowed;
  77                         }
  78                 }
  79         }
  80
  81         if (! $allowed) {
  82                 error(gettext("prohibited by allowed_attachments")." ($allowed)");
  83         }
  84         else {
  85                 return 1;
  86         }
  87 }
  88
  89 sub checkconfig () {
  90         $config{cgi_disable_uploads}=0;
  91 }
  92
  93 sub formbuilder_setup (@) {
  94         my %params=@_;
  95         my $form=$params{form};
  96         my $q=$params{cgi};
  97
  98         if (defined $form->field("do") && ($form->field("do") eq "edit" ||
  99             $form->field("do") eq "create")) {
 100                 # Add attachment field, set type to multipart.
 101                 $form->enctype(&CGI::MULTIPART);
 102                 $form->field(name => 'attachment', type => 'file');
 103                 # These buttons are not put in the usual place, so
 104                 # are not added to the normal formbuilder button list.
 105                 $form->tmpl_param("field-upload" => '<input name="_submit" type="submit" value="Upload Attachment" />');
 106                 $form->tmpl_param("field-link" => '<input name="_submit" type="submit" value="Insert Links" />');
 107
 108                 # Add the toggle javascript; the attachments interface uses
 109                 # it to toggle visibility.
 110                 require IkiWiki::Plugin::toggle;
 111                 $form->tmpl_param("javascript" => IkiWiki::Plugin::toggle::include_javascript($params{page}, 1));
 112                 # Start with the attachments interface toggled invisible,
 113                 # but if it was used, keep it open.
 114                 if ($form->submitted ne "Upload Attachment" &&
 115                     (! defined $q->param("attachment_select") ||
 116                     ! length $q->param("attachment_select"))) {
 117                         $form->tmpl_param("attachments-class" => "toggleable");
 118                 }
 119                 else {
 120                         $form->tmpl_param("attachments-class" => "toggleable-open");
 121                 }
 122         }
 123         elsif ($form->title eq "preferences") {
 124                 # XXX deprecated, should remove eventually
 125                 my $session=$params{session};
 126                 my $user_name=$session->param("name");
 127
 128                 $form->field(name => "allowed_attachments", size => 50,
 129                         fieldset => "admin",
 130                         comment => "deprecated; please move to allowed_attachments in setup file",
 131                 );
 132                 if (! IkiWiki::is_admin($user_name)) {
 133                         $form->field(name => "allowed_attachments", type => "hidden");
 134                 }
 135                 if (! $form->submitted) {
 136                         my $value=IkiWiki::userinfo_get($user_name, "allowed_attachments");
 137                         if (length $value) {
 138                                 $form->field(name => "allowed_attachments", force => 1,
 139                                         value => IkiWiki::userinfo_get($user_name, "allowed_attachments"));
 140                         }
 141                         else {
 142                                 $form->field(name => "allowed_attachments", type => "hidden");
 143                         }
 144                 }
 145                 if ($form->submitted && $form->submitted eq 'Save Preferences') {
 146                         if (defined $form->field("allowed_attachments")) {
 147                                 IkiWiki::userinfo_set($user_name, "allowed_attachments",
 148                                 $form->field("allowed_attachments")) ||
 149                                         error("failed to set allowed_attachments");
 150                                 if (! length $form->field("allowed_attachments")) {
 151                                         $form->field(name => "allowed_attachments", type => "hidden");
 152                                 }
 153                         }
 154                 }
 155         }
 156 }
 157
 158 sub formbuilder (@) {
 159         my %params=@_;
 160         my $form=$params{form};
 161         my $q=$params{cgi};
 162
 163         return if ! defined $form->field("do") || ($form->field("do") ne "edit" && $form->field("do") ne "create") ;
 164
 165         my $filename=$q->param('attachment');
 166         if (defined $filename && length $filename &&
 167             ($form->submitted eq "Upload Attachment" || $form->submitted eq "Save Page")) {
 168                 my $session=$params{session};
 169
 170                 # This is an (apparently undocumented) way to get the name
 171                 # of the temp file that CGI writes the upload to.
 172                 my $tempfile=$q->tmpFileName($filename);
 173                 if (! defined $tempfile || ! length $tempfile) {
 174                         # perl 5.8 needs an alternative, awful method
 175                         if ($q =~ /HASH/ && exists $q->{'.tmpfiles'}) {
 176                                 foreach my $key (keys(%{$q->{'.tmpfiles'}})) {
 177                                         $tempfile=$q->tmpFileName(\$key);
 178                                         last if defined $tempfile && length $tempfile;
 179                                 }
 180                         }
 181                         if (! defined $tempfile || ! length $tempfile) {
 182                                 error("CGI::tmpFileName failed to return the uploaded file name");
 183                         }
 184                 }
 185
 186                 $filename=linkpage(IkiWiki::possibly_foolish_untaint(
 187                                 attachment_location($form->field('page')).
 188                                 IkiWiki::basename($filename)));
 189                 if (IkiWiki::file_pruned($filename, $config{srcdir})) {
 190                         error(gettext("bad attachment filename"));
 191                 }
 192
 193                 # Check that the user is allowed to edit a page with the
 194                 # name of the attachment.
 195                 IkiWiki::check_canedit($filename, $q, $session, 1);
 196                 # And that the attachment itself is acceptable.
 197                 check_canattach($session, $filename, $tempfile);
 198
 199                 # Needed for fast_file_copy and for rendering below.
 200                 require IkiWiki::Render;
 201
 202                 # Move the attachment into place.
 203                 # Try to use a fast rename; fall back to copying.
 204                 IkiWiki::prep_writefile($filename, $config{srcdir});
 205                 unlink($config{srcdir}."/".$filename);
 206                 if (rename($tempfile, $config{srcdir}."/".$filename)) {
 207                         # The temp file has tight permissions; loosen up.
 208                         chmod(0666 & ~umask, $config{srcdir}."/".$filename);
 209                 }
 210                 else {
 211                         my $fh=$q->upload('attachment');
 212                         if (! defined $fh || ! ref $fh) {
 213                                 # needed by old CGI versions
 214                                 $fh=$q->param('attachment');
 215                                 if (! defined $fh || ! ref $fh) {
 216                                         # even that doesn't always work,
 217                                         # fall back to opening the tempfile
 218                                         $fh=undef;
 219                                         open($fh, "<", $tempfile) || error("failed to open \"$tempfile\": $!");
 220                                 }
 221                         }
 222                         binmode($fh);
 223                         writefile($filename, $config{srcdir}, undef, 1, sub {
 224                                 IkiWiki::fast_file_copy($tempfile, $filename, $fh, @_);
 225                         });
 226                 }
 227
 228                 # Check the attachment in and trigger a wiki refresh.
 229                 if ($config{rcs}) {
 230                         IkiWiki::rcs_add($filename);
 231                         IkiWiki::disable_commit_hook();
 232                         IkiWiki::rcs_commit($filename, gettext("attachment upload"),
 233                                 IkiWiki::rcs_prepedit($filename),
 234                                 $session->param("name"), $ENV{REMOTE_ADDR});
 235                         IkiWiki::enable_commit_hook();
 236                         IkiWiki::rcs_update();
 237                 }
 238                 IkiWiki::refresh();
 239                 IkiWiki::saveindex();
 240         }
 241         elsif ($form->submitted eq "Insert Links") {
 242                 my $page=quotemeta($q->param("page"));
 243                 my $add="";
 244                 foreach my $f ($q->param("attachment_select")) {
 245                         $f=~s/^$page\///;
 246                         $add.="[[$f]]\n";
 247                 }
 248                 $form->field(name => 'editcontent',
 249                         value => $form->field('editcontent')."\n\n".$add,
 250                         force => 1) if length $add;
 251         }
 252
 253         # Generate the attachment list only after having added any new
 254         # attachments.
 255         $form->tmpl_param("attachment_list" => [attachment_list($form->field('page'))]);
 256 }
 257
 258 sub attachment_location ($) {
 259         my $page=shift;
 260
 261         # Put the attachment in a subdir of the page it's attached
 262         # to, unless that page is an "index" page.
 263         $page=~s/(^|\/)index//;
 264         $page.="/" if length $page;
 265
 266         return $page;
 267 }
 268
 269 sub attachment_list ($) {
 270         my $page=shift;
 271         my $loc=attachment_location($page);
 272
 273         my @ret;
 274         foreach my $f (values %pagesources) {
 275                 if (! defined pagetype($f) &&
 276                     $f=~m/^\Q$loc\E[^\/]+$/ &&
 277                     -e "$config{srcdir}/$f") {
 278                         push @ret, {
 279                                 "field-select" => '<input type="checkbox" name="attachment_select" value="'.$f.'" />',
 280                                 link => htmllink($page, $page, $f, noimageinline => 1),
 281                                 size => IkiWiki::Plugin::filecheck::humansize((stat(_))[7]),
 282                                 mtime => displaytime($IkiWiki::pagemtime{$f}),
 283                         };
 284                 }
 285         }
 286
 287         # Sort newer attachments to the top of the list, so a newly-added
 288         # attachment appears just before the form used to add it.
 289         return sort { $b->{mtime_raw} <=> $a->{mtime_raw} || $a->{link} cmp $b->{link} } @ret;
 290 }
 291
 292 1