ikiwiki/IkiWiki/Plugin/attachment.pm

510 lines
14 KiB
Perl

#!/usr/bin/perl
package IkiWiki::Plugin::attachment;
use warnings;
use strict;
use IkiWiki 2.00;
sub import { #{{{
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);
} # }}}
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 $pagesources{$dest} && $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},
);
}
# XXX deprecated, should be removed eventually
if ($allowed) {
foreach my $admin (@{$config{adminuser}}) {
my $allowed_attachments=IkiWiki::userinfo_get($admin, "allowed_attachments");
if (defined $allowed_attachments &&
length $allowed_attachments) {
$allowed=pagespec_match($dest,
$allowed_attachments,
file => $file,
user => $session->param("name"),
ip => $ENV{REMOTE_ADDR},
);
last if $allowed;
}
}
}
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") {
# 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 javascript from the toggle plugin;
# the attachments interface uses it to toggle visibility.
require IkiWiki::Plugin::toggle;
$form->tmpl_param("javascript" => $IkiWiki::Plugin::toggle::javascript);
# 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");
}
}
elsif ($form->title eq "preferences") {
# XXX deprecated, should remove eventually
my $session=$params{session};
my $user_name=$session->param("name");
$form->field(name => "allowed_attachments", size => 50,
fieldset => "admin",
comment => "deprecated; please move to allowed_attachments in setup file",
);
if (! IkiWiki::is_admin($user_name)) {
$form->field(name => "allowed_attachments", type => "hidden");
}
if (! $form->submitted) {
my $value=IkiWiki::userinfo_get($user_name, "allowed_attachments");
if (length $value) {
$form->field(name => "allowed_attachments", force => 1,
value => IkiWiki::userinfo_get($user_name, "allowed_attachments"));
}
else {
$form->field(name => "allowed_attachments", type => "hidden");
}
}
if ($form->submitted && $form->submitted eq 'Save Preferences') {
if (defined $form->field("allowed_attachments")) {
IkiWiki::userinfo_set($user_name, "allowed_attachments",
$form->field("allowed_attachments")) ||
error("failed to set allowed_attachments");
if (! length $form->field("allowed_attachments")) {
$form->field(name => "allowed_attachments", type => "hidden");
}
}
}
}
} #}}}
sub formbuilder (@) { #{{{
my %params=@_;
my $form=$params{form};
my $q=$params{cgi};
return if ! defined $form->field("do") || $form->field("do") ne "edit";
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=IkiWiki::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 IkiWiki::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 => humansize((stat(_))[7]),
mtime => displaytime($IkiWiki::pagemtime{$f}),
mtime_raw => $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;
} #}}}
my %units=( #{{{ # size in bytes
B => 1,
byte => 1,
KB => 2 ** 10,
kilobyte => 2 ** 10,
K => 2 ** 10,
KB => 2 ** 10,
kilobyte => 2 ** 10,
M => 2 ** 20,
MB => 2 ** 20,
megabyte => 2 ** 20,
G => 2 ** 30,
GB => 2 ** 30,
gigabyte => 2 ** 30,
T => 2 ** 40,
TB => 2 ** 40,
terabyte => 2 ** 40,
P => 2 ** 50,
PB => 2 ** 50,
petabyte => 2 ** 50,
E => 2 ** 60,
EB => 2 ** 60,
exabyte => 2 ** 60,
Z => 2 ** 70,
ZB => 2 ** 70,
zettabyte => 2 ** 70,
Y => 2 ** 80,
YB => 2 ** 80,
yottabyte => 2 ** 80,
# ikiwiki, if you find you need larger data quantities, either modify
# yourself to add them, or travel back in time to 2008 and kill me.
# -- Joey
); #}}}
sub parsesize ($) { #{{{
my $size=shift;
no warnings;
my $base=$size+0; # force to number
use warnings;
foreach my $unit (sort keys %units) {
if ($size=~/[0-9\s]\Q$unit\E$/i) {
return $base * $units{$unit};
}
}
return $base;
} #}}}
sub humansize ($) { #{{{
my $size=shift;
foreach my $unit (reverse sort { $units{$a} <=> $units{$b} || $b cmp $a } keys %units) {
if ($size / $units{$unit} > 0.25) {
return (int($size / $units{$unit} * 10)/10).$unit;
}
}
return $size; # near zero, or negative
} #}}}
package IkiWiki::PageSpec;
sub match_maxsize ($$;@) { #{{{
shift;
my $maxsize=eval{IkiWiki::Plugin::attachment::parsesize(shift)};
if ($@) {
return IkiWiki::FailReason->new("unable to parse maxsize (or number too large)");
}
my %params=@_;
if (! exists $params{file}) {
return IkiWiki::FailReason->new("no file specified");
}
if (-s $params{file} > $maxsize) {
return IkiWiki::FailReason->new("file too large (".(-s $params{file})." > $maxsize)");
}
else {
return IkiWiki::SuccessReason->new("file not too large");
}
} #}}}
sub match_minsize ($$;@) { #{{{
shift;
my $minsize=eval{IkiWiki::Plugin::attachment::parsesize(shift)};
if ($@) {
return IkiWiki::FailReason->new("unable to parse minsize (or number too large)");
}
my %params=@_;
if (! exists $params{file}) {
return IkiWiki::FailReason->new("no file specified");
}
if (-s $params{file} < $minsize) {
return IkiWiki::FailReason->new("file too small");
}
else {
return IkiWiki::SuccessReason->new("file not too small");
}
} #}}}
sub match_mimetype ($$;@) { #{{{
shift;
my $wanted=shift;
my %params=@_;
if (! exists $params{file}) {
return IkiWiki::FailReason->new("no file specified");
}
# Use ::magic to get the mime type, the idea is to only trust
# data obtained by examining the actual file contents.
eval q{use File::MimeInfo::Magic};
if ($@) {
return IkiWiki::FailReason->new("failed to load File::MimeInfo::Magic ($@); cannot check MIME type");
}
my $mimetype=File::MimeInfo::Magic::magic($params{file});
if (! defined $mimetype) {
$mimetype="unknown";
}
my $regexp=IkiWiki::glob2re($wanted);
if ($mimetype!~/^$regexp$/i) {
return IkiWiki::FailReason->new("file MIME type is $mimetype, not $wanted");
}
else {
return IkiWiki::SuccessReason->new("file MIME type is $mimetype");
}
} #}}}
sub match_virusfree ($$;@) { #{{{
shift;
my $wanted=shift;
my %params=@_;
if (! exists $params{file}) {
return IkiWiki::FailReason->new("no file specified");
}
if (! exists $IkiWiki::config{virus_checker} ||
! length $IkiWiki::config{virus_checker}) {
return IkiWiki::FailReason->new("no virus_checker configured");
}
# The file needs to be fed into the virus checker on stdin,
# because the file is not world-readable, and if clamdscan is
# used, clamd would fail to read it.
eval q{use IPC::Open2};
error($@) if $@;
open (IN, "<", $params{file}) || return IkiWiki::FailReason->new("failed to read file");
binmode(IN);
my $sigpipe=0;
$SIG{PIPE} = sub { $sigpipe=1 };
my $pid=open2(\*CHECKER_OUT, "<&IN", $IkiWiki::config{virus_checker});
my $reason=<CHECKER_OUT>;
chomp $reason;
1 while (<CHECKER_OUT>);
close(CHECKER_OUT);
waitpid $pid, 0;
$SIG{PIPE}="DEFAULT";
if ($sigpipe || $?) {
if (! length $reason) {
$reason="virus checker $IkiWiki::config{virus_checker}; failed with no output";
}
return IkiWiki::FailReason->new("file seems to contain a virus ($reason)");
}
else {
return IkiWiki::SuccessReason->new("file seems virusfree ($reason)");
}
} #}}}
sub match_ispage ($$;@) { #{{{
my $filename=shift;
if (defined IkiWiki::pagetype($filename)) {
return IkiWiki::SuccessReason->new("file is a wiki page");
}
else {
return IkiWiki::FailReason->new("file is not a wiki page");
}
} #}}}
sub match_user ($$;@) { #{{{
shift;
my $user=shift;
my %params=@_;
if (! exists $params{user}) {
return IkiWiki::FailReason->new("no user specified");
}
if (defined $params{user} && lc $params{user} eq lc $user) {
return IkiWiki::SuccessReason->new("user is $user");
}
elsif (! defined $params{user}) {
return IkiWiki::FailReason->new("not logged in");
}
else {
return IkiWiki::FailReason->new("user is $params{user}, not $user");
}
} #}}}
sub match_ip ($$;@) { #{{{
shift;
my $ip=shift;
my %params=@_;
if (! exists $params{ip}) {
return IkiWiki::FailReason->new("no IP specified");
}
if (defined $params{ip} && lc $params{ip} eq lc $ip) {
return IkiWiki::SuccessReason->new("IP is $ip");
}
else {
return IkiWiki::FailReason->new("IP is $params{ip}, not $ip");
}
} #}}}
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