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         hook(type => "getsetup", id => "attachment", call => \&getsetup);
  10         hook(type => "checkconfig", id => "attachment", call => \&checkconfig);
  11         hook(type => "formbuilder_setup", id => "attachment", call => \&formbuilder_setup);
  12         hook(type => "formbuilder", id => "attachment", call => \&formbuilder);
  13         IkiWiki::loadplugin("filecheck");
  14 } # }}}
  15
  16 sub getsetup () { #{{{
  17         return
  18                 plugin => {
  19                         safe => 1,
  20                         rebuild => 0,
  21                 },
  22                 allowed_attachments => {
  23                         type => "pagespec",
  24                         example => "virusfree() and mimetype(image/*) and maxsize(50kb)",
  25                         description => "enhanced PageSpec specifying what attachments are allowed",
  26                         link => "ikiwiki/PageSpec/attachment",
  27                         safe => 1,
  28                         rebuild => 0,
  29                 },
  30                 virus_checker => {
  31                         type => "string",
  32                         example => "clamdscan -",
  33                         description => "virus checker program (reads STDIN, returns nonzero if virus found)",
  34                         safe => 0, # executed
  35                         rebuild => 0,
  36                 },
  37 } #}}}
  38
  39 sub check_canattach ($$;$) { #{{{
  40         my $session=shift;
  41         my $dest=shift; # where it's going to be put, under the srcdir
  42         my $file=shift; # the path to the attachment currently
  43
  44         # Don't allow an attachment to be uploaded with the same name as an
  45         # existing page.
  46         if (exists $IkiWiki::pagesources{$dest} &&
  47             $IkiWiki::pagesources{$dest} ne $dest) {
  48                 error(sprintf(gettext("there is already a page named %s"), $dest));
  49         }
  50
  51         # Use a special pagespec to test that the attachment is valid.
  52         my $allowed=1;
  53         if (defined $config{allowed_attachments} &&
  54             length $config{allowed_attachments}) {
  55                 $allowed=pagespec_match($dest,
  56                         $config{allowed_attachments},
  57                         file => $file,
  58                         user => $session->param("name"),
  59                         ip => $ENV{REMOTE_ADDR},
  60                 );
  61         }
  62
  63         # XXX deprecated, should be removed eventually
  64         if ($allowed) {
  65                 foreach my $admin (@{$config{adminuser}}) {
  66                         my $allowed_attachments=IkiWiki::userinfo_get($admin, "allowed_attachments");
  67                         if (defined $allowed_attachments &&
  68                             length $allowed_attachments) {
  69                                 $allowed=pagespec_match($dest,
  70                                         $allowed_attachments,
  71                                         file => $file,
  72                                         user => $session->param("name"),
  73                                         ip => $ENV{REMOTE_ADDR},
  74                                 );
  75                                 last if $allowed;
  76                         }
  77                 }
  78         }
  79
  80         if (! $allowed) {
  81                 error(gettext("prohibited by allowed_attachments")." ($allowed)");
  82         }
  83         else {
  84                 return 1;
  85         }
  86 } #}}}
  87
  88 sub checkconfig () { #{{{
  89         $config{cgi_disable_uploads}=0;
  90 } #}}}
  91
  92 sub formbuilder_setup (@) { #{{{
  93         my %params=@_;
  94         my $form=$params{form};
  95         my $q=$params{cgi};
  96
  97         if (defined $form->field("do") && ($form->field("do") eq "edit" ||
  98             $form->field("do") eq "create")) {
  99                 # Add attachment field, set type to multipart.
 100                 $form->enctype(&CGI::MULTIPART);
 101                 $form->field(name => 'attachment', type => 'file');
 102                 # These buttons are not put in the usual place, so
 103                 # are not added to the normal formbuilder button list.
 104                 $form->tmpl_param("field-upload" => '<input name="_submit" type="submit" value="Upload Attachment" />');
 105                 $form->tmpl_param("field-link" => '<input name="_submit" type="submit" value="Insert Links" />');
 106
 107                 # Add the javascript from the toggle plugin;
 108                 # the attachments interface uses it to toggle visibility.
 109                 require IkiWiki::Plugin::toggle;
 110                 $form->tmpl_param("javascript" => $IkiWiki::Plugin::toggle::javascript);
 111                 # Start with the attachments interface toggled invisible,
 112                 # but if it was used, keep it open.
 113                 if ($form->submitted ne "Upload Attachment" &&
 114                     (! defined $q->param("attachment_select") ||
 115                     ! length $q->param("attachment_select"))) {
 116                         $form->tmpl_param("attachments-class" => "toggleable");
 117                 }
 118                 else {
 119                         $form->tmpl_param("attachments-class" => "toggleable-open");
 120                 }
 121         }
 122         elsif ($form->title eq "preferences") {
 123                 # XXX deprecated, should remove eventually
 124                 my $session=$params{session};
 125                 my $user_name=$session->param("name");
 126
 127                 $form->field(name => "allowed_attachments", size => 50,
 128                         fieldset => "admin",
 129                         comment => "deprecated; please move to allowed_attachments in setup file",
 130                 );
 131                 if (! IkiWiki::is_admin($user_name)) {
 132                         $form->field(name => "allowed_attachments", type => "hidden");
 133                 }
 134                 if (! $form->submitted) {
 135                         my $value=IkiWiki::userinfo_get($user_name, "allowed_attachments");
 136                         if (length $value) {
 137                                 $form->field(name => "allowed_attachments", force => 1,
 138                                         value => IkiWiki::userinfo_get($user_name, "allowed_attachments"));
 139                         }
 140                         else {
 141                                 $form->field(name => "allowed_attachments", type => "hidden");
 142                         }
 143                 }
 144                 if ($form->submitted && $form->submitted eq 'Save Preferences') {
 145                         if (defined $form->field("allowed_attachments")) {
 146                                 IkiWiki::userinfo_set($user_name, "allowed_attachments",
 147                                 $form->field("allowed_attachments")) ||
 148                                         error("failed to set allowed_attachments");
 149                                 if (! length $form->field("allowed_attachments")) {
 150                                         $form->field(name => "allowed_attachments", type => "hidden");
 151                                 }
 152                         }
 153                 }
 154         }
 155 } #}}}
 156
 157 sub formbuilder (@) { #{{{
 158         my %params=@_;
 159         my $form=$params{form};
 160         my $q=$params{cgi};
 161
 162         return if ! defined $form->field("do") || ($form->field("do") ne "edit" && $form->field("do") ne "create") ;
 163
 164         my $filename=$q->param('attachment');
 165         if (defined $filename && length $filename &&
 166             ($form->submitted eq "Upload Attachment" || $form->submitted eq "Save Page")) {
 167                 my $session=$params{session};
 168
 169                 # This is an (apparently undocumented) way to get the name
 170                 # of the temp file that CGI writes the upload to.
 171                 my $tempfile=$q->tmpFileName($filename);
 172                 if (! defined $tempfile || ! length $tempfile) {
 173                         # perl 5.8 needs an alternative, awful method
 174                         if ($q =~ /HASH/ && exists $q->{'.tmpfiles'}) {
 175                                 foreach my $key (keys(%{$q->{'.tmpfiles'}})) {
 176                                         $tempfile=$q->tmpFileName(\$key);
 177                                         last if defined $tempfile && length $tempfile;
 178                                 }
 179                         }
 180                         if (! defined $tempfile || ! length $tempfile) {
 181                                 error("CGI::tmpFileName failed to return the uploaded file name");
 182                         }
 183                 }
 184
 185                 $filename=linkpage(IkiWiki::possibly_foolish_untaint(
 186                                 attachment_location($form->field('page')).
 187                                 IkiWiki::basename($filename)));
 188                 if (IkiWiki::file_pruned($filename, $config{srcdir})) {
 189                         error(gettext("bad attachment filename"));
 190                 }
 191
 192                 # Check that the user is allowed to edit a page with the
 193                 # name of the attachment.
 194                 IkiWiki::check_canedit($filename, $q, $session, 1);
 195                 # And that the attachment itself is acceptable.
 196                 check_canattach($session, $filename, $tempfile);
 197
 198                 # Needed for fast_file_copy and for rendering below.
 199                 require IkiWiki::Render;
 200
 201                 # Move the attachment into place.
 202                 # Try to use a fast rename; fall back to copying.
 203                 IkiWiki::prep_writefile($filename, $config{srcdir});
 204                 unlink($config{srcdir}."/".$filename);
 205                 if (rename($tempfile, $config{srcdir}."/".$filename)) {
 206                         # The temp file has tight permissions; loosen up.
 207                         chmod(0666 & ~umask, $config{srcdir}."/".$filename);
 208                 }
 209                 else {
 210                         my $fh=$q->upload('attachment');
 211                         if (! defined $fh || ! ref $fh) {
 212                                 # needed by old CGI versions
 213                                 $fh=$q->param('attachment');
 214                                 if (! defined $fh || ! ref $fh) {
 215                                         # even that doesn't always work,
 216                                         # fall back to opening the tempfile
 217                                         $fh=undef;
 218                                         open($fh, "<", $tempfile) || error("failed to open \"$tempfile\": $!");
 219                                 }
 220                         }
 221                         binmode($fh);
 222                         writefile($filename, $config{srcdir}, undef, 1, sub {
 223                                 IkiWiki::fast_file_copy($tempfile, $filename, $fh, @_);
 224                         });
 225                 }
 226
 227                 # Check the attachment in and trigger a wiki refresh.
 228                 if ($config{rcs}) {
 229                         IkiWiki::rcs_add($filename);
 230                         IkiWiki::disable_commit_hook();
 231                         IkiWiki::rcs_commit($filename, gettext("attachment upload"),
 232                                 IkiWiki::rcs_prepedit($filename),
 233                                 $session->param("name"), $ENV{REMOTE_ADDR});
 234                         IkiWiki::enable_commit_hook();
 235                         IkiWiki::rcs_update();
 236                 }
 237                 IkiWiki::refresh();
 238                 IkiWiki::saveindex();
 239         }
 240         elsif ($form->submitted eq "Insert Links") {
 241                 my $page=quotemeta($q->param("page"));
 242                 my $add="";
 243                 foreach my $f ($q->param("attachment_select")) {
 244                         $f=~s/^$page\///;
 245                         $add.="[[$f]]\n";
 246                 }
 247                 $form->field(name => 'editcontent',
 248                         value => $form->field('editcontent')."\n\n".$add,
 249                         force => 1) if length $add;
 250         }
 251
 252         # Generate the attachment list only after having added any new
 253         # attachments.
 254         $form->tmpl_param("attachment_list" => [attachment_list($form->field('page'))]);
 255 } # }}}
 256
 257 sub attachment_location ($) { #{{{
 258         my $page=shift;
 259
 260         # Put the attachment in a subdir of the page it's attached
 261         # to, unless that page is an "index" page.
 262         $page=~s/(^|\/)index//;
 263         $page.="/" if length $page;
 264
 265         return $page;
 266 } #}}}
 267
 268 sub attachment_list ($) { #{{{
 269         my $page=shift;
 270         my $loc=attachment_location($page);
 271
 272         my @ret;
 273         foreach my $f (values %pagesources) {
 274                 if (! defined pagetype($f) &&
 275                     $f=~m/^\Q$loc\E[^\/]+$/ &&
 276                     -e "$config{srcdir}/$f") {
 277                         push @ret, {
 278                                 "field-select" => '<input type="checkbox" name="attachment_select" value="'.$f.'" />',
 279                                 link => htmllink($page, $page, $f, noimageinline => 1),
 280                                 size => IkiWiki::Plugin::filecheck::humansize((stat(_))[7]),
 281                                 mtime => displaytime($IkiWiki::pagemtime{$f}),
 282                                 mtime_raw => $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 package IkiWiki::PageSpec;
 293
 294 sub match_user ($$;@) { #{{{
 295         shift;
 296         my $user=shift;
 297         my %params=@_;
 298
 299         if (! exists $params{user}) {
 300                 return IkiWiki::FailReason->new("no user specified");
 301         }
 302
 303         if (defined $params{user} && lc $params{user} eq lc $user) {
 304                 return IkiWiki::SuccessReason->new("user is $user");
 305         }
 306         elsif (! defined $params{user}) {
 307                 return IkiWiki::FailReason->new("not logged in");
 308         }
 309         else {
 310                 return IkiWiki::FailReason->new("user is $params{user}, not $user");
 311         }
 312 } #}}}
 313
 314 sub match_admin ($$;@) { #{{{
 315         shift;
 316         shift;
 317         my %params=@_;
 318
 319         if (! exists $params{user}) {
 320                 return IkiWiki::FailReason->new("no user specified");
 321         }
 322
 323         if (defined $params{user} && IkiWiki::is_admin($params{user})) {
 324                 return IkiWiki::SuccessReason->new("user is an admin");
 325         }
 326         elsif (! defined $params{user}) {
 327                 return IkiWiki::FailReason->new("not logged in");
 328         }
 329         else {
 330                 return IkiWiki::FailReason->new("user is not an admin");
 331         }
 332 } #}}}
 333
 334 sub match_ip ($$;@) { #{{{
 335         shift;
 336         my $ip=shift;
 337         my %params=@_;
 338
 339         if (! exists $params{ip}) {
 340                 return IkiWiki::FailReason->new("no IP specified");
 341         }
 342
 343         if (defined $params{ip} && lc $params{ip} eq lc $ip) {
 344                 return IkiWiki::SuccessReason->new("IP is $ip");
 345         }
 346         else {
 347                 return IkiWiki::FailReason->new("IP is $params{ip}, not $ip");
 348         }
 349 } #}}}
 350
 351 1