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#!/usr/bin/perl
package IkiWiki::Plugin::attachment;
use warnings;
use strict;
use IkiWiki 3.00;
sub import {
add_underlay("javascript");
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);
IkiWiki::loadplugin("filecheck");
}
sub getsetup () {
return
plugin => {
safe => 1,
rebuild => 0,
},
allowed_attachments => {
type => "pagespec",
example => "virusfree() and mimetype(image/*) and maxsize(50kb)",
description => "enhanced PageSpec specifying what attachments are allowed",
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 => $ENV{REMOTE_ADDR},
);
}
if (! $allowed) {
error(gettext("prohibited by allowed_attachments")." ($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');
# These buttons are not put in the usual place, so
# are not added to the normal formbuilder button list.
$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 the toggle javascript; the attachments interface uses
# it to toggle visibility.
require IkiWiki::Plugin::toggle;
$form->tmpl_param("javascript" => IkiWiki::Plugin::toggle::include_javascript($params{page}, 1));
# 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");
}
}
}
sub formbuilder (@) {
my %params=@_;
my $form=$params{form};
my $q=$params{cgi};
return if ! defined $form->field("do") || ($form->field("do") ne "edit" && $form->field("do") ne "create") ;
my $filename=$q->param('attachment');
if (defined $filename && length $filename &&
($form->submitted eq "Upload Attachment" || $form->submitted eq "Save Page")) {
my $session=$params{session};
# 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");
}
}
$filename=linkpage(IkiWiki::possibly_foolish_untaint(
attachment_location($form->field('page')).
IkiWiki::basename($filename)));
if (IkiWiki::file_pruned($filename, $config{srcdir})) {
error(gettext("bad attachment filename"));
}
# Check that the user is allowed to edit a page with the
# name of the attachment.
IkiWiki::check_canedit($filename, $q, $session, 1);
# And that the attachment itself is acceptable.
check_canattach($session, $filename, $tempfile);
# Needed for fast_file_copy and for rendering below.
require IkiWiki::Render;
# Move the attachment into place.
# Try to use a fast rename; fall back to copying.
IkiWiki::prep_writefile($filename, $config{srcdir});
unlink($config{srcdir}."/".$filename);
if (rename($tempfile, $config{srcdir}."/".$filename)) {
# The temp file has tight permissions; loosen up.
chmod(0666 & ~umask, $config{srcdir}."/".$filename);
}
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);
writefile($filename, $config{srcdir}, undef, 1, sub {
IkiWiki::fast_file_copy($tempfile, $filename, $fh, @_);
});
}
# Check the attachment in and trigger a wiki refresh.
if ($config{rcs}) {
IkiWiki::rcs_add($filename);
IkiWiki::disable_commit_hook();
IkiWiki::rcs_commit($filename, gettext("attachment upload"),
IkiWiki::rcs_prepedit($filename),
$session->param("name"), $ENV{REMOTE_ADDR});
IkiWiki::enable_commit_hook();
IkiWiki::rcs_update();
}
IkiWiki::refresh();
IkiWiki::saveindex();
}
elsif ($form->submitted eq "Insert Links") {
my $page=quotemeta($q->param("page"));
my $add="";
foreach my $f ($q->param("attachment_select")) {
$f=~s/^$page\///;
$add.="[[$f]]\n";
}
$form->field(name => 'editcontent',
value => $form->field('editcontent')."\n\n".$add,
force => 1) if length $add;
}
# Generate the attachment list only after having added any new
# attachments.
$form->tmpl_param("attachment_list" => [attachment_list($form->field('page'))]);
}
sub attachment_location ($) {
my $page=shift;
# Put the attachment in a subdir of the page it's attached
# to, unless that page is an "index" page.
$page=~s/(^|\/)index//;
$page.="/" if length $page;
return $page;
}
sub attachment_list ($) {
my $page=shift;
my $loc=attachment_location($page);
my @ret;
foreach my $f (values %pagesources) {
if (! defined pagetype($f) &&
$f=~m/^\Q$loc\E[^\/]+$/ &&
-e "$config{srcdir}/$f") {
push @ret, {
"field-select" => '<input type="checkbox" name="attachment_select" value="'.$f.'" />',
link => htmllink($page, $page, $f, noimageinline => 1),
size => IkiWiki::Plugin::filecheck::humansize((stat(_))[7]),
mtime => displaytime($IkiWiki::pagemtime{$f}),
};
}
}
# Sort newer attachments to the top of the list, so a newly-added
# attachment appears just before the form used to add it.
return sort { $b->{mtime_raw} <=> $a->{mtime_raw} || $a->{link} cmp $b->{link} } @ret;
}
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