ikiwiki/IkiWiki/Plugin/attachment.pm

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Perl
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#!/usr/bin/perl
package IkiWiki::Plugin::attachment;
use warnings;
use strict;
use IkiWiki 3.00;
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sub import {
add_underlay("attachment");
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add_underlay("javascript");
add_underlay("jquery");
hook(type => "getsetup", id => "attachment", call => \&getsetup);
hook(type => "checkconfig", id => "attachment", call => \&checkconfig);
hook(type => "formbuilder_setup", id => "attachment", call => \&formbuilder_setup);
hook(type => "formbuilder", id => "attachment", call => \&formbuilder, last => 1);
IkiWiki::loadplugin("filecheck");
}
sub getsetup () {
return
plugin => {
safe => 1,
rebuild => 0,
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section => "web",
},
allowed_attachments => {
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type => "pagespec",
example => "virusfree() and mimetype(image/*) and maxsize(50kb)",
description => "enhanced PageSpec specifying what attachments are allowed",
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link => "ikiwiki/PageSpec/attachment",
safe => 1,
rebuild => 0,
},
virus_checker => {
type => "string",
example => "clamdscan -",
description => "virus checker program (reads STDIN, returns nonzero if virus found)",
safe => 0, # executed
rebuild => 0,
},
}
sub check_canattach ($$;$) {
my $session=shift;
my $dest=shift; # where it's going to be put, under the srcdir
my $file=shift; # the path to the attachment currently
# Don't allow an attachment to be uploaded with the same name as an
# existing page.
if (exists $IkiWiki::pagesources{$dest} &&
$IkiWiki::pagesources{$dest} ne $dest) {
error(sprintf(gettext("there is already a page named %s"), $dest));
}
# Use a special pagespec to test that the attachment is valid.
my $allowed=1;
if (defined $config{allowed_attachments} &&
length $config{allowed_attachments}) {
$allowed=pagespec_match($dest,
$config{allowed_attachments},
file => $file,
user => $session->param("name"),
ip => $session->remote_addr(),
);
}
if (! $allowed) {
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error(gettext("prohibited by allowed_attachments")." ($allowed)");
}
else {
return 1;
}
}
sub checkconfig () {
$config{cgi_disable_uploads}=0;
}
sub formbuilder_setup (@) {
my %params=@_;
my $form=$params{form};
my $q=$params{cgi};
if (defined $form->field("do") && ($form->field("do") eq "edit" ||
$form->field("do") eq "create")) {
# Add attachment field, set type to multipart.
$form->enctype(&CGI::MULTIPART);
$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" />');
$form->tmpl_param("field-link" => '<input name="_submit" type="submit" value="Insert Links" />');
# Add all the javascript used by the attachments interface.
require IkiWiki::Plugin::toggle;
my $js=IkiWiki::Plugin::toggle::include_javascript($params{page});
$js.='<link rel="stylesheet" href="'.urlto("ikiwiki/jquery-ui.min.css", $params{page}).'" id="theme">'."\n";
my @jsfiles=qw{jquery.min jquery-ui.min
jquery.tmpl.min jquery.iframe-transport
jquery.fileupload jquery.fileupload-ui
};
foreach my $file (@jsfiles) {
$js.='<script src="'.urlto("ikiwiki/$file.js", $params{page}).
'" type="text/javascript" charset="utf-8"></script>'."\n";
}
$form->tmpl_param("javascript" => $js);
# Start with the attachments interface toggled invisible,
# but if it was used, keep it open.
if ($form->submitted ne "Upload Attachment" &&
(! defined $q->param("attachment_select") ||
! length $q->param("attachment_select"))) {
$form->tmpl_param("attachments-class" => "toggleable");
}
else {
$form->tmpl_param("attachments-class" => "toggleable-open");
}
# Save attachments in holding area before previewing and
# saving.
if ($form->submitted eq "Preview" ||
$form->submitted eq "Save Page") {
attachments_save($form, $params{session});
}
}
}
sub formbuilder (@) {
my %params=@_;
my $form=$params{form};
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my $q=$params{cgi};
return if ! defined $form->field("do") || ($form->field("do") ne "edit" && $form->field("do") ne "create") ;
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my $filename=Encode::decode_utf8($q->param('attachment'));
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if (defined $filename && length $filename) {
attachment_store($filename, $form, $q, $params{session});
}
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if ($form->submitted eq "Save Page") {
attachments_save($form, $params{session});
}
if ($form->submitted eq "Insert Links") {
my $page=quotemeta(Encode::decode_utf8($q->param("page")));
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my $add="";
foreach my $f ($q->param("attachment_select")) {
$f=Encode::decode_utf8($f);
$f=~s/^$page\///;
if (IkiWiki::isinlinableimage($f) &&
IkiWiki::Plugin::img->can("import")) {
$add.='[[!img '.$f.' align="right" size="" alt=""]]';
}
else {
$add.="[[$f]]";
}
$add.="\n";
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}
$form->field(name => 'editcontent',
value => $form->field('editcontent')."\n\n".$add,
force => 1) if length $add;
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}
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# Generate the attachment list only after having added any new
# attachments.
$form->tmpl_param("attachment_list" => [attachment_list($form->field('page'))]);
}
sub attachment_holding_location {
my $page=attachment_location(shift);
my $dir=$config{wikistatedir}."/attachments/".
IkiWiki::possibly_foolish_untaint(linkpage($page));
$dir=~s/\/$//;
return $dir;
}
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sub is_held_attachment {
my $attachment=shift;
my $f=attachment_holding_location($attachment);
if (-f $f) {
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return $f
}
else {
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return undef;
}
}
# Stores the attachment in a holding area, not yet in the wiki proper.
sub attachment_store {
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my $filename=shift;
my $form=shift;
my $q=shift;
my $session=shift;
# This is an (apparently undocumented) way to get the name
# of the temp file that CGI writes the upload to.
my $tempfile=$q->tmpFileName($filename);
if (! defined $tempfile || ! length $tempfile) {
# perl 5.8 needs an alternative, awful method
if ($q =~ /HASH/ && exists $q->{'.tmpfiles'}) {
foreach my $key (keys(%{$q->{'.tmpfiles'}})) {
$tempfile=$q->tmpFileName(\$key);
last if defined $tempfile && length $tempfile;
}
}
if (! defined $tempfile || ! length $tempfile) {
error("CGI::tmpFileName failed to return the uploaded file name");
}
}
$filename=IkiWiki::basename($filename);
$filename=~s/.*\\+(.+)/$1/; # hello, windows
$filename=IkiWiki::possibly_foolish_untaint(linkpage($filename));
my $dest=attachment_holding_location($form->field('page'));
# Check that the user is allowed to edit the attachment.
my $final_filename=
linkpage(IkiWiki::possibly_foolish_untaint(
attachment_location($form->field('page')))).
$filename;
eval {
if (IkiWiki::file_pruned($final_filename)) {
error(gettext("bad attachment filename"));
}
IkiWiki::check_canedit($final_filename, $q, $session);
# And that the attachment itself is acceptable.
check_canattach($session, $final_filename, $tempfile);
};
if ($@) {
json_response($q, $form, $dest."/".$filename, $@);
error $@;
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}
# Move the attachment into holding directory.
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# Try to use a fast rename; fall back to copying.
IkiWiki::prep_writefile($filename, $dest);
unlink($dest."/".$filename);
if (rename($tempfile, $dest."/".$filename)) {
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# The temp file has tight permissions; loosen up.
chmod(0666 & ~umask, $dest."/".$filename);
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}
else {
my $fh=$q->upload('attachment');
if (! defined $fh || ! ref $fh) {
# needed by old CGI versions
$fh=$q->param('attachment');
if (! defined $fh || ! ref $fh) {
# even that doesn't always work,
# fall back to opening the tempfile
$fh=undef;
open($fh, "<", $tempfile) || error("failed to open \"$tempfile\": $!");
}
}
binmode($fh);
require IkiWiki::Render;
writefile($filename, $dest, undef, 1, sub {
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IkiWiki::fast_file_copy($tempfile, $filename, $fh, @_);
});
}
json_response($q, $form, $dest."/".$filename, stored_msg());
}
# Save all stored attachments for a page.
sub attachments_save {
my $form=shift;
my $session=shift;
# Move attachments out of holding directory.
my @attachments;
my $dir=attachment_holding_location($form->field('page'));
foreach my $filename (glob("$dir/*")) {
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$filename=Encode::decode_utf8($filename);
next unless -f $filename;
my $destdir=linkpage(IkiWiki::possibly_foolish_untaint(
attachment_location($form->field('page'))));
my $absdestdir=$config{srcdir}."/".$destdir;
my $destfile=IkiWiki::basename($filename);
my $dest=$absdestdir.$destfile;
unlink($dest);
IkiWiki::prep_writefile($destfile, $absdestdir);
rename($filename, $dest);
push @attachments, $destdir.$destfile;
}
return unless @attachments;
require IkiWiki::Render;
IkiWiki::prune($dir, $config{wikistatedir}."/attachments");
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# Check the attachments in and trigger a wiki refresh.
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if ($config{rcs}) {
IkiWiki::rcs_add($_) foreach @attachments;
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IkiWiki::disable_commit_hook();
IkiWiki::rcs_commit_staged(
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message => gettext("attachment upload"),
session => $session,
);
IkiWiki::enable_commit_hook();
IkiWiki::rcs_update();
}
IkiWiki::refresh();
IkiWiki::saveindex();
}
sub attachment_location ($) {
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my $page=shift;
# Put the attachment in a subdir of the page it's attached
# to, unless that page is the "index" page.
return "" if $page eq 'index';
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$page.="/" if length $page;
return $page;
}
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sub attachment_list ($) {
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my $page=shift;
my $loc=attachment_location($page);
my $std=sub {
my $file=shift;
my $mtime=shift;
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my $date=shift;
my $size=shift;
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name => $file,
size => IkiWiki::Plugin::filecheck::humansize($size),
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mtime => $date,
mtime_raw => $mtime,
};
# attachments already in the wiki
my %attachments;
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foreach my $f (values %pagesources) {
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if (! defined pagetype($f) &&
$f=~m/^\Q$loc\E[^\/]+$/) {
$attachments{$f}={
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$std->($f, $IkiWiki::pagemtime{$f}, displaytime($IkiWiki::pagemtime{$f}), (stat($f))[7]),
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link => htmllink($page, $page, $f, noimageinline => 1),
};
}
}
# attachments in holding directory
my $dir=attachment_holding_location($page);
my $heldmsg=gettext("this attachment is not yet saved");
foreach my $file (glob("$dir/*")) {
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$file=Encode::decode_utf8($file);
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next unless -f $file;
my $base=IkiWiki::basename($file);
my $f=$loc.$base;
$attachments{$f}={
$std->($f, (stat($file))[9]*2, stored_msg(), (stat(_))[7]),
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link => $base,
}
}
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# Sort newer attachments to the end of the list.
return sort { $a->{mtime_raw} <=> $b->{mtime_raw} || $a->{link} cmp $b->{link} }
values %attachments;
}
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sub stored_msg {
gettext("just uploaded");
}
sub json_response ($$$$) {
my $q=shift;
my $form=shift;
my $filename=shift;
my $stored_msg=shift;
if (! defined $form->submitted ||
$form->submitted ne "Upload Attachment") {
eval q{use JSON};
error $@ if $@;
print "Content-type: text/html\n\n";
my $size=-s $filename;
print to_json([
{
name => IkiWiki::basename($filename),
size => $size,
humansize => IkiWiki::Plugin::filecheck::humansize($size),
stored_msg => $stored_msg,
}
]);
exit 0;
}
}
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