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("attachment");
  10         add_underlay("javascript");
  11         add_underlay("jquery");
  12         hook(type => "getsetup", id => "attachment", call => \&getsetup);
  13         hook(type => "checkconfig", id => "attachment", call => \&checkconfig);
  14         hook(type => "formbuilder_setup", id => "attachment", call => \&formbuilder_setup);
  15         hook(type => "formbuilder", id => "attachment", call => \&formbuilder, last => 1);
  16         IkiWiki::loadplugin("filecheck");
  17 }
  18
  19 sub getsetup () {
  20         return
  21                 plugin => {
  22                         safe => 1,
  23                         rebuild => 0,
  24                         section => "web",
  25                 },
  26                 allowed_attachments => {
  27                         type => "pagespec",
  28                         example => "virusfree() and mimetype(image/*) and maxsize(50kb)",
  29                         description => "enhanced PageSpec specifying what attachments are allowed",
  30                         link => "ikiwiki/PageSpec/attachment",
  31                         safe => 1,
  32                         rebuild => 0,
  33                 },
  34                 virus_checker => {
  35                         type => "string",
  36                         example => "clamdscan -",
  37                         description => "virus checker program (reads STDIN, returns nonzero if virus found)",
  38                         safe => 0, # executed
  39                         rebuild => 0,
  40                 },
  41 }
  42
  43 sub check_canattach ($$;$) {
  44         my $session=shift;
  45         my $dest=shift; # where it's going to be put, under the srcdir
  46         my $file=shift; # the path to the attachment currently
  47
  48         # Don't allow an attachment to be uploaded with the same name as an
  49         # existing page.
  50         if (exists $IkiWiki::pagesources{$dest} &&
  51             $IkiWiki::pagesources{$dest} ne $dest) {
  52                 error(sprintf(gettext("there is already a page named %s"), $dest));
  53         }
  54
  55         # Use a special pagespec to test that the attachment is valid.
  56         my $allowed=1;
  57         if (defined $config{allowed_attachments} &&
  58             length $config{allowed_attachments}) {
  59                 $allowed=pagespec_match($dest,
  60                         $config{allowed_attachments},
  61                         file => $file,
  62                         user => $session->param("name"),
  63                         ip => $session->remote_addr(),
  64                 );
  65         }
  66
  67         if (! $allowed) {
  68                 error(gettext("prohibited by allowed_attachments")." ($allowed)");
  69         }
  70         else {
  71                 return 1;
  72         }
  73 }
  74
  75 sub checkconfig () {
  76         $config{cgi_disable_uploads}=0;
  77 }
  78
  79 sub formbuilder_setup (@) {
  80         my %params=@_;
  81         my $form=$params{form};
  82         my $q=$params{cgi};
  83
  84         if (defined $form->field("do") && ($form->field("do") eq "edit" ||
  85             $form->field("do") eq "create")) {
  86                 # Add attachment field, set type to multipart.
  87                 $form->enctype(&CGI::MULTIPART);
  88                 $form->field(name => 'attachment', type => 'file');
  89                 # These buttons are not put in the usual place, so
  90                 # are not added to the normal formbuilder button list.
  91                 $form->tmpl_param("field-upload" => '<input name="_submit" type="submit" value="Upload Attachment" />');
  92                 $form->tmpl_param("field-link" => '<input name="_submit" type="submit" value="Insert Links" />');
  93
  94                 # Add all the javascript used by the attachments interface.
  95                 require IkiWiki::Plugin::toggle;
  96                 my $js=IkiWiki::Plugin::toggle::include_javascript($params{page});
  97                 $js.='<link rel="stylesheet" href="'.urlto("ikiwiki/jquery-ui.min.css", $params{page}).'" id="theme">'."\n";
  98                 my @jsfiles=qw{jquery.min jquery-ui.min
  99                         jquery.tmpl.min jquery.iframe-transport
 100                         jquery.fileupload jquery.fileupload-ui
 101                 };
 102                 foreach my $file (@jsfiles) {
 103                         $js.='<script src="'.urlto("ikiwiki/$file.js", $params{page}).
 104                              '" type="text/javascript" charset="utf-8"></script>'."\n";
 105                 }
 106                 $form->tmpl_param("javascript" => $js);
 107
 108                 # Start with the attachments interface toggled invisible,
 109                 # but if it was used, keep it open.
 110                 if ($form->submitted ne "Upload Attachment" &&
 111                     (! defined $q->param("attachment_select") ||
 112                     ! length $q->param("attachment_select"))) {
 113                         $form->tmpl_param("attachments-class" => "toggleable");
 114                 }
 115                 else {
 116                         $form->tmpl_param("attachments-class" => "toggleable-open");
 117                 }
 118
 119                 # Save attachments in holding area before previewing and
 120                 # saving.
 121                 if ($form->submitted eq "Preview" ||
 122                     $form->submitted eq "Save Page") {
 123                         attachments_save($form, $params{session});
 124                 }
 125         }
 126 }
 127
 128 sub formbuilder (@) {
 129         my %params=@_;
 130         my $form=$params{form};
 131         my $q=$params{cgi};
 132
 133         return if ! defined $form->field("do") || ($form->field("do") ne "edit" && $form->field("do") ne "create") ;
 134
 135         my $filename=Encode::decode_utf8(scalar $q->param('attachment'));
 136         my $handle=$q->upload('attachment');
 137
 138         if (defined $filename && length $filename) {
 139                 attachment_store($filename, $handle, $form, $q, $params{session});
 140         }
 141
 142         if ($form->submitted eq "Save Page") {
 143                 attachments_save($form, $params{session});
 144         }
 145
 146         if ($form->submitted eq "Insert Links") {
 147                 my $page=quotemeta(Encode::decode_utf8(scalar $q->param("page")));
 148                 my $add="";
 149                 foreach my $f (@{$q->param_fetch("attachment_select")}) {
 150                         $f=Encode::decode_utf8($f);
 151                         $f=~s/^$page\///;
 152                         if (IkiWiki::isinlinableimage($f) &&
 153                             IkiWiki::Plugin::img->can("import")) {
 154                                 $add.='[[!img '.$f.' align="right" size="" alt=""]]';
 155                         }
 156                         else {
 157                                 $add.="[[$f]]";
 158                         }
 159                         $add.="\n";
 160                 }
 161                 $form->field(name => 'editcontent',
 162                         value => $form->field('editcontent')."\n\n".$add,
 163                         force => 1) if length $add;
 164         }
 165
 166         # Generate the attachment list only after having added any new
 167         # attachments.
 168         $form->tmpl_param("attachment_list" => [attachment_list(scalar $form->field('page'))]);
 169 }
 170
 171 sub attachment_holding_location {
 172         my $page=attachment_location(shift);
 173
 174         my $dir=$config{wikistatedir}."/attachments/".
 175                 IkiWiki::possibly_foolish_untaint(linkpage($page));
 176         $dir=~s/\/$//;
 177         return $dir;
 178 }
 179
 180 sub is_held_attachment {
 181         my $attachment=shift;
 182
 183         my $f=attachment_holding_location($attachment);
 184         if (-f $f) {
 185                 return $f
 186         }
 187         else {
 188                 return undef;
 189         }
 190 }
 191
 192 # Stores the attachment in a holding area, not yet in the wiki proper.
 193 sub attachment_store {
 194         my $filename=shift;
 195         my $handle=shift;
 196         my $form=shift;
 197         my $q=shift;
 198         my $session=shift;
 199
 200         my $tempfile;
 201         if (defined $handle) {
 202                 # This is what works in CGI.pm 4.09+: $q->tmpFileName($q->upload('attachment'))
 203                 $tempfile=$q->tmpFileName($handle);
 204         }
 205         if (! defined $tempfile || ! length $tempfile) {
 206                 # This is what is *documented* in CGI.pm 4.09: $q->tmpFileName($q->param('attachment'))
 207                 $tempfile=$q->tmpFileName($filename);
 208         }
 209         if (! defined $tempfile || ! length $tempfile) {
 210                 # perl 5.8 needs an alternative, awful method
 211                 if ($q =~ /HASH/ && exists $q->{'.tmpfiles'}) {
 212                         foreach my $key (keys(%{$q->{'.tmpfiles'}})) {
 213                                 $tempfile=$q->tmpFileName(\$key);
 214                                 last if defined $tempfile && length $tempfile;
 215                         }
 216                 }
 217         }
 218         if (! defined $tempfile || ! length $tempfile) {
 219                 error("CGI::tmpFileName failed to return the uploaded file name");
 220         }
 221
 222         $filename=IkiWiki::basename($filename);
 223         $filename=~s/.*\\+(.+)/$1/; # hello, windows
 224         $filename=IkiWiki::possibly_foolish_untaint(linkpage($filename));
 225         my $dest=attachment_holding_location($form->field('page'));
 226
 227         # Check that the user is allowed to edit the attachment.
 228         my $final_filename=
 229                 linkpage(IkiWiki::possibly_foolish_untaint(
 230                         attachment_location($form->field('page')))).
 231                 $filename;
 232         eval {
 233                 if (IkiWiki::file_pruned($final_filename)) {
 234                         error(gettext("bad attachment filename"));
 235                 }
 236                 IkiWiki::check_canedit($final_filename, $q, $session);
 237                 # And that the attachment itself is acceptable.
 238                 check_canattach($session, $final_filename, $tempfile);
 239         };
 240         if ($@) {
 241                 # save error in case called functions clobber $@
 242                 my $error = $@;
 243                 json_response($q, $form, $dest."/".$filename, $error);
 244                 error $error;
 245         }
 246
 247         # Move the attachment into holding directory.
 248         # Try to use a fast rename; fall back to copying.
 249         IkiWiki::prep_writefile($filename, $dest);
 250         unlink($dest."/".$filename);
 251         if (rename($tempfile, $dest."/".$filename)) {
 252                 # The temp file has tight permissions; loosen up.
 253                 chmod(0666 & ~umask, $dest."/".$filename);
 254         }
 255         else {
 256                 my $fh=$q->upload('attachment');
 257                 if (! defined $fh || ! ref $fh) {
 258                         # needed by old CGI versions
 259                         $fh=$q->param('attachment');
 260                         if (! defined $fh || ! ref $fh) {
 261                                 # even that doesn't always work,
 262                                 # fall back to opening the tempfile
 263                                 $fh=undef;
 264                                 open($fh, "<", $tempfile) || error("failed to open \"$tempfile\": $!");
 265                         }
 266                 }
 267                 binmode($fh);
 268                 require IkiWiki::Render;
 269                 writefile($filename, $dest, undef, 1, sub {
 270                         IkiWiki::fast_file_copy($tempfile, $filename, $fh, @_);
 271                 });
 272         }
 273
 274         json_response($q, $form, $dest."/".$filename, stored_msg());
 275 }
 276
 277 # Save all stored attachments for a page.
 278 sub attachments_save {
 279         my $form=shift;
 280         my $session=shift;
 281
 282         # Move attachments out of holding directory.
 283         my @attachments;
 284         my $dir=attachment_holding_location($form->field('page'));
 285         foreach my $filename (glob("$dir/*")) {
 286                 $filename=Encode::decode_utf8($filename);
 287                 next unless -f $filename;
 288                 my $destdir=linkpage(IkiWiki::possibly_foolish_untaint(
 289                         attachment_location($form->field('page'))));
 290                 my $absdestdir=$config{srcdir}."/".$destdir;
 291                 my $destfile=IkiWiki::basename($filename);
 292                 my $dest=$absdestdir.$destfile;
 293                 unlink($dest);
 294                 IkiWiki::prep_writefile($destfile, $absdestdir);
 295                 rename($filename, $dest);
 296                 push @attachments, $destdir.$destfile;
 297         }
 298         return unless @attachments;
 299         require IkiWiki::Render;
 300         IkiWiki::prune($dir, $config{wikistatedir}."/attachments");
 301
 302         # Check the attachments in and trigger a wiki refresh.
 303         if ($config{rcs}) {
 304                 IkiWiki::rcs_add($_) foreach @attachments;
 305                 IkiWiki::disable_commit_hook();
 306                 IkiWiki::rcs_commit_staged(
 307                         message => gettext("attachment upload"),
 308                         session => $session,
 309                 );
 310                 IkiWiki::enable_commit_hook();
 311                 IkiWiki::rcs_update();
 312         }
 313         IkiWiki::refresh();
 314         IkiWiki::saveindex();
 315 }
 316
 317 sub attachment_location ($) {
 318         my $page=shift;
 319
 320         # Put the attachment in a subdir of the page it's attached
 321         # to, unless that page is the "index" page.
 322         return "" if $page eq 'index';
 323         $page.="/" if length $page;
 324
 325         return $page;
 326 }
 327
 328 sub attachment_list ($) {
 329         my $page=shift;
 330         my $loc=attachment_location($page);
 331
 332         my $std=sub {
 333                 my $file=shift;
 334                 my $mtime=shift;
 335                 my $date=shift;
 336                 my $size=shift;
 337
 338                 name => $file,
 339                 size => IkiWiki::Plugin::filecheck::humansize($size),
 340                 mtime => $date,
 341                 mtime_raw => $mtime,
 342         };
 343
 344         # attachments already in the wiki
 345         my %attachments;
 346         foreach my $f (values %pagesources) {
 347                 if (! defined pagetype($f) &&
 348                     $f=~m/^\Q$loc\E[^\/]+$/) {
 349                         $attachments{$f}={
 350                                 $std->($f, $IkiWiki::pagemtime{$f}, displaytime($IkiWiki::pagemtime{$f}), (stat($f))[7]),
 351                                 link => htmllink($page, $page, $f, noimageinline => 1),
 352                         };
 353                 }
 354         }
 355
 356         # attachments in holding directory
 357         my $dir=attachment_holding_location($page);
 358         my $heldmsg=gettext("this attachment is not yet saved");
 359         foreach my $file (glob("$dir/*")) {
 360                 $file=Encode::decode_utf8($file);
 361                 next unless -f $file;
 362                 my $base=IkiWiki::basename($file);
 363                 my $f=$loc.$base;
 364                 $attachments{$f}={
 365                         $std->($f, (stat($file))[9]*2, stored_msg(), (stat(_))[7]),
 366                         link => $base,
 367                 }
 368         }
 369
 370         # Sort newer attachments to the end of the list.
 371         return sort { $a->{mtime_raw} <=> $b->{mtime_raw} || $a->{link} cmp $b->{link} }
 372                 values %attachments;
 373 }
 374
 375 sub stored_msg {
 376         gettext("just uploaded");
 377 }
 378
 379 sub json_response ($$$$) {
 380         my $q=shift;
 381         my $form=shift;
 382         my $filename=shift;
 383         my $stored_msg=shift;
 384
 385         if (! defined $form->submitted ||
 386             $form->submitted ne "Upload Attachment") {
 387                 eval q{use JSON};
 388                 error $@ if $@;
 389                 print "Content-type: text/html\n\n";
 390                 my $size=-s $filename;
 391                 print to_json([
 392                         {
 393                                 name => IkiWiki::basename($filename),
 394                                 size => $size,
 395                                 humansize => IkiWiki::Plugin::filecheck::humansize($size),
 396                                 stored_msg => $stored_msg,
 397
 398                         }
 399                 ]);
 400                 exit 0;
 401         }
 402 }
 403
 404 1