480 lines
13 KiB
Perl
480 lines
13 KiB
Perl
#!/usr/bin/perl
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package IkiWiki::Plugin::attachment;
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use warnings;
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use strict;
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use IkiWiki 2.00;
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sub import { #{{{
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hook(type => "getsetup", id => "attachment", call => \&getsetup);
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hook(type => "checkconfig", id => "attachment", call => \&checkconfig);
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hook(type => "formbuilder_setup", id => "attachment", call => \&formbuilder_setup);
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hook(type => "formbuilder", id => "attachment", call => \&formbuilder);
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} # }}}
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sub getsetup () { #{{{
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return
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=> {
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type => "string",
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default => "",
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example => "clamdscan -",
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description => "virus checker program (reads STDIN, returns nonzero if virus found)",
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safe => 0, # executed
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rebuild => 0,
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},
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} #}}}
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sub check_canattach ($$;$) { #{{{
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my $session=shift;
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my $dest=shift; # where it's going to be put, under the srcdir
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my $file=shift; # the path to the attachment currently
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# Don't allow an attachment to be uploaded with the same name as an
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# existing page.
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if (exists $pagesources{$dest} && $pagesources{$dest} ne $dest) {
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error(sprintf(gettext("there is already a page named %s"), $dest));
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}
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# Use a special pagespec to test that the attachment is valid.
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my $allowed=1;
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foreach my $admin (@{$config{adminuser}}) {
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my $allowed_attachments=IkiWiki::userinfo_get($admin, "allowed_attachments");
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if (defined $allowed_attachments &&
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length $allowed_attachments) {
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$allowed=pagespec_match($dest,
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$allowed_attachments,
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file => $file,
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user => $session->param("name"),
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ip => $ENV{REMOTE_ADDR},
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);
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last if $allowed;
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}
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}
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if (! $allowed) {
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error(gettext("prohibited by allowed_attachments")." ($allowed)");
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}
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else {
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return 1;
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}
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} #}}}
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sub checkconfig () { #{{{
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$config{cgi_disable_uploads}=0;
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} #}}}
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sub formbuilder_setup (@) { #{{{
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my %params=@_;
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my $form=$params{form};
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my $q=$params{cgi};
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if (defined $form->field("do") && $form->field("do") eq "edit") {
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# Add attachment field, set type to multipart.
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$form->enctype(&CGI::MULTIPART);
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$form->field(name => 'attachment', type => 'file');
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# These buttons are not put in the usual place, so
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# are not added to the normal formbuilder button list.
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$form->tmpl_param("field-upload" => '<input name="_submit" type="submit" value="Upload Attachment" />');
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$form->tmpl_param("field-link" => '<input name="_submit" type="submit" value="Insert Links" />');
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# Add the javascript from the toggle plugin;
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# the attachments interface uses it to toggle visibility.
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require IkiWiki::Plugin::toggle;
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$form->tmpl_param("javascript" => $IkiWiki::Plugin::toggle::javascript);
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# Start with the attachments interface toggled invisible,
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# but if it was used, keep it open.
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if ($form->submitted ne "Upload Attachment" &&
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(! defined $q->param("attachment_select") ||
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! length $q->param("attachment_select"))) {
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$form->tmpl_param("attachments-class" => "toggleable");
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}
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else {
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$form->tmpl_param("attachments-class" => "toggleable-open");
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}
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}
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elsif ($form->title eq "preferences") {
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my $session=$params{session};
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my $user_name=$session->param("name");
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$form->field(name => "allowed_attachments", size => 50,
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fieldset => "admin",
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comment => "(".
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htmllink("", "",
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"ikiwiki/PageSpec/attachment",
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noimageinline => 1,
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linktext => "Enhanced PageSpec",
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).")"
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);
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if (! IkiWiki::is_admin($user_name)) {
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$form->field(name => "allowed_attachments", type => "hidden");
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}
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if (! $form->submitted) {
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$form->field(name => "allowed_attachments", force => 1,
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value => IkiWiki::userinfo_get($user_name, "allowed_attachments"));
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}
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if ($form->submitted && $form->submitted eq 'Save Preferences') {
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if (defined $form->field("allowed_attachments")) {
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IkiWiki::userinfo_set($user_name, "allowed_attachments",
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$form->field("allowed_attachments")) ||
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error("failed to set allowed_attachments");
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}
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}
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}
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} #}}}
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sub formbuilder (@) { #{{{
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my %params=@_;
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my $form=$params{form};
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my $q=$params{cgi};
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return if ! defined $form->field("do") || $form->field("do") ne "edit";
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my $filename=$q->param('attachment');
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if (defined $filename && length $filename &&
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($form->submitted eq "Upload Attachment" || $form->submitted eq "Save Page")) {
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my $session=$params{session};
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# This is an (apparently undocumented) way to get the name
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# of the temp file that CGI writes the upload to.
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my $tempfile=$q->tmpFileName($filename);
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if (! defined $tempfile || ! length $tempfile) {
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# perl 5.8 needs an alternative, awful method
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if ($q =~ /HASH/ && exists $q->{'.tmpfiles'}) {
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foreach my $key (keys(%{$q->{'.tmpfiles'}})) {
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$tempfile=$q->tmpFileName(\$key);
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last if defined $tempfile && length $tempfile;
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}
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}
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if (! defined $tempfile || ! length $tempfile) {
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error("CGI::tmpFileName failed to return the uploaded file name");
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}
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}
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$filename=IkiWiki::linkpage(
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IkiWiki::possibly_foolish_untaint(
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attachment_location($form->field('page')).
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IkiWiki::basename($filename)));
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if (IkiWiki::file_pruned($filename, $config{srcdir})) {
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error(gettext("bad attachment filename"));
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}
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# Check that the user is allowed to edit a page with the
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# name of the attachment.
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IkiWiki::check_canedit($filename, $q, $session, 1);
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# And that the attachment itself is acceptable.
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check_canattach($session, $filename, $tempfile);
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# Needed for fast_file_copy and for rendering below.
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require IkiWiki::Render;
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# Move the attachment into place.
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# Try to use a fast rename; fall back to copying.
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IkiWiki::prep_writefile($filename, $config{srcdir});
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unlink($config{srcdir}."/".$filename);
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if (rename($tempfile, $config{srcdir}."/".$filename)) {
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# The temp file has tight permissions; loosen up.
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chmod(0666 & ~umask, $config{srcdir}."/".$filename);
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}
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else {
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my $fh=$q->upload('attachment');
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if (! defined $fh || ! ref $fh) {
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# needed by old CGI versions
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$fh=$q->param('attachment');
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if (! defined $fh || ! ref $fh) {
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# even that doesn't always work,
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# fall back to opening the tempfile
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$fh=undef;
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open($fh, "<", $tempfile) || error("failed to open \"$tempfile\": $!");
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}
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}
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binmode($fh);
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writefile($filename, $config{srcdir}, undef, 1, sub {
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IkiWiki::fast_file_copy($tempfile, $filename, $fh, @_);
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});
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}
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# Check the attachment in and trigger a wiki refresh.
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if ($config{rcs}) {
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IkiWiki::rcs_add($filename);
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IkiWiki::disable_commit_hook();
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IkiWiki::rcs_commit($filename, gettext("attachment upload"),
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IkiWiki::rcs_prepedit($filename),
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$session->param("name"), $ENV{REMOTE_ADDR});
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IkiWiki::enable_commit_hook();
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IkiWiki::rcs_update();
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}
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IkiWiki::refresh();
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IkiWiki::saveindex();
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}
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elsif ($form->submitted eq "Insert Links") {
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my $page=quotemeta($q->param("page"));
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my $add="";
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foreach my $f ($q->param("attachment_select")) {
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$f=~s/^$page\///;
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$add.="[[$f]]\n";
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}
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$form->field(name => 'editcontent',
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value => $form->field('editcontent')."\n\n".$add,
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force => 1) if length $add;
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}
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# Generate the attachment list only after having added any new
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# attachments.
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$form->tmpl_param("attachment_list" => [attachment_list($form->field('page'))]);
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} # }}}
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sub attachment_location ($) { #{{{
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my $page=shift;
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# Put the attachment in a subdir of the page it's attached
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# to, unless that page is an "index" page.
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$page=~s/(^|\/)index//;
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$page.="/" if length $page;
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return $page;
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} #}}}
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sub attachment_list ($) { #{{{
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my $page=shift;
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my $loc=attachment_location($page);
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my @ret;
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foreach my $f (values %pagesources) {
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if (! defined IkiWiki::pagetype($f) &&
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$f=~m/^\Q$loc\E[^\/]+$/ &&
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-e "$config{srcdir}/$f") {
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push @ret, {
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"field-select" => '<input type="checkbox" name="attachment_select" value="'.$f.'" />',
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link => htmllink($page, $page, $f, noimageinline => 1),
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size => humansize((stat(_))[7]),
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mtime => displaytime($IkiWiki::pagemtime{$f}),
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mtime_raw => $IkiWiki::pagemtime{$f},
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};
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}
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}
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# Sort newer attachments to the top of the list, so a newly-added
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# attachment appears just before the form used to add it.
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return sort { $b->{mtime_raw} <=> $a->{mtime_raw} || $a->{link} cmp $b->{link} } @ret;
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} #}}}
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my %units=( #{{{ # size in bytes
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B => 1,
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byte => 1,
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KB => 2 ** 10,
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kilobyte => 2 ** 10,
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K => 2 ** 10,
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KB => 2 ** 10,
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kilobyte => 2 ** 10,
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M => 2 ** 20,
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MB => 2 ** 20,
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megabyte => 2 ** 20,
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G => 2 ** 30,
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GB => 2 ** 30,
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gigabyte => 2 ** 30,
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T => 2 ** 40,
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TB => 2 ** 40,
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terabyte => 2 ** 40,
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P => 2 ** 50,
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PB => 2 ** 50,
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petabyte => 2 ** 50,
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E => 2 ** 60,
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EB => 2 ** 60,
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exabyte => 2 ** 60,
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Z => 2 ** 70,
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ZB => 2 ** 70,
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zettabyte => 2 ** 70,
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Y => 2 ** 80,
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YB => 2 ** 80,
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yottabyte => 2 ** 80,
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# ikiwiki, if you find you need larger data quantities, either modify
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# yourself to add them, or travel back in time to 2008 and kill me.
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# -- Joey
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); #}}}
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sub parsesize ($) { #{{{
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my $size=shift;
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no warnings;
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my $base=$size+0; # force to number
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use warnings;
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foreach my $unit (sort keys %units) {
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if ($size=~/[0-9\s]\Q$unit\E$/i) {
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return $base * $units{$unit};
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}
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}
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return $base;
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} #}}}
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sub humansize ($) { #{{{
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my $size=shift;
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foreach my $unit (reverse sort { $units{$a} <=> $units{$b} || $b cmp $a } keys %units) {
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if ($size / $units{$unit} > 0.25) {
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return (int($size / $units{$unit} * 10)/10).$unit;
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}
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}
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return $size; # near zero, or negative
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} #}}}
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package IkiWiki::PageSpec;
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sub match_maxsize ($$;@) { #{{{
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shift;
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my $maxsize=eval{IkiWiki::Plugin::attachment::parsesize(shift)};
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if ($@) {
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return IkiWiki::FailReason->new("unable to parse maxsize (or number too large)");
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}
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my %params=@_;
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if (! exists $params{file}) {
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return IkiWiki::FailReason->new("no file specified");
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}
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if (-s $params{file} > $maxsize) {
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return IkiWiki::FailReason->new("file too large (".(-s $params{file})." > $maxsize)");
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}
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else {
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return IkiWiki::SuccessReason->new("file not too large");
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}
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} #}}}
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sub match_minsize ($$;@) { #{{{
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shift;
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my $minsize=eval{IkiWiki::Plugin::attachment::parsesize(shift)};
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if ($@) {
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return IkiWiki::FailReason->new("unable to parse minsize (or number too large)");
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}
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my %params=@_;
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if (! exists $params{file}) {
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return IkiWiki::FailReason->new("no file specified");
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}
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if (-s $params{file} < $minsize) {
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return IkiWiki::FailReason->new("file too small");
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}
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else {
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return IkiWiki::SuccessReason->new("file not too small");
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}
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} #}}}
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sub match_mimetype ($$;@) { #{{{
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shift;
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my $wanted=shift;
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my %params=@_;
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if (! exists $params{file}) {
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return IkiWiki::FailReason->new("no file specified");
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}
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# Use ::magic to get the mime type, the idea is to only trust
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# data obtained by examining the actual file contents.
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eval q{use File::MimeInfo::Magic};
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if ($@) {
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return IkiWiki::FailReason->new("failed to load File::MimeInfo::Magic ($@); cannot check MIME type");
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}
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my $mimetype=File::MimeInfo::Magic::magic($params{file});
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if (! defined $mimetype) {
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$mimetype="unknown";
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}
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my $regexp=IkiWiki::glob2re($wanted);
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if ($mimetype!~/^$regexp$/i) {
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return IkiWiki::FailReason->new("file MIME type is $mimetype, not $wanted");
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}
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else {
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return IkiWiki::SuccessReason->new("file MIME type is $mimetype");
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}
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} #}}}
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sub match_virusfree ($$;@) { #{{{
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shift;
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my $wanted=shift;
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my %params=@_;
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if (! exists $params{file}) {
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return IkiWiki::FailReason->new("no file specified");
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}
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if (! exists $IkiWiki::config{virus_checker} ||
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! length $IkiWiki::config{virus_checker}) {
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return IkiWiki::FailReason->new("no virus_checker configured");
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}
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# The file needs to be fed into the virus checker on stdin,
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# because the file is not world-readable, and if clamdscan is
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# used, clamd would fail to read it.
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eval q{use IPC::Open2};
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error($@) if $@;
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open (IN, "<", $params{file}) || return IkiWiki::FailReason->new("failed to read file");
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binmode(IN);
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my $sigpipe=0;
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$SIG{PIPE} = sub { $sigpipe=1 };
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my $pid=open2(\*CHECKER_OUT, "<&IN", $IkiWiki::config{virus_checker});
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my $reason=<CHECKER_OUT>;
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chomp $reason;
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1 while (<CHECKER_OUT>);
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close(CHECKER_OUT);
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waitpid $pid, 0;
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$SIG{PIPE}="DEFAULT";
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if ($sigpipe || $?) {
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if (! length $reason) {
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$reason="virus checker $IkiWiki::config{virus_checker}; failed with no output";
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}
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return IkiWiki::FailReason->new("file seems to contain a virus ($reason)");
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}
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else {
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return IkiWiki::SuccessReason->new("file seems virusfree ($reason)");
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}
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} #}}}
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sub match_ispage ($$;@) { #{{{
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my $filename=shift;
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if (defined IkiWiki::pagetype($filename)) {
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return IkiWiki::SuccessReason->new("file is a wiki page");
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}
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else {
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return IkiWiki::FailReason->new("file is not a wiki page");
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}
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} #}}}
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sub match_user ($$;@) { #{{{
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shift;
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my $user=shift;
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my %params=@_;
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if (! exists $params{user}) {
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return IkiWiki::FailReason->new("no user specified");
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}
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if (defined $params{user} && lc $params{user} eq lc $user) {
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return IkiWiki::SuccessReason->new("user is $user");
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}
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elsif (! defined $params{user}) {
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return IkiWiki::FailReason->new("not logged in");
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}
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else {
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return IkiWiki::FailReason->new("user is $params{user}, not $user");
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}
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} #}}}
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sub match_ip ($$;@) { #{{{
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shift;
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my $ip=shift;
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my %params=@_;
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if (! exists $params{ip}) {
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return IkiWiki::FailReason->new("no IP specified");
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}
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if (defined $params{ip} && lc $params{ip} eq lc $ip) {
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return IkiWiki::SuccessReason->new("IP is $ip");
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}
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else {
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return IkiWiki::FailReason->new("IP is $params{ip}, not $ip");
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}
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} #}}}
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1
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