ikiwiki/IkiWiki/CGI.pm

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#!/usr/bin/perl
use warnings;
use strict;
use IkiWiki;
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use IkiWiki::UserInfo;
use open qw{:utf8 :std};
use Encode;
package IkiWiki;
sub printheader ($) { #{{{
my $session=shift;
if ($config{sslcookie}) {
print $session->header(-charset => 'utf-8',
-cookie => $session->cookie(-secure => 1));
} else {
print $session->header(-charset => 'utf-8');
}
} #}}}
sub showform ($$$$) { #{{{
my $form=shift;
my $buttons=shift;
my $session=shift;
my $cgi=shift;
if (exists $hooks{formbuilder}) {
run_hooks(formbuilder => sub {
shift->(form => $form, cgi => $cgi, session => $session,
buttons => $buttons);
});
}
printheader($session);
print misctemplate($form->title, $form->render(submit => $buttons));
}
sub redirect ($$) { #{{{
my $q=shift;
my $url=shift;
if (! $config{w3mmode}) {
print $q->redirect($url);
}
else {
print "Content-type: text/plain\n";
print "W3m-control: GOTO $url\n\n";
}
} #}}}
sub check_canedit ($$$;$) { #{{{
my $page=shift;
my $q=shift;
my $session=shift;
my $nonfatal=shift;
my $canedit;
run_hooks(canedit => sub {
return if defined $canedit;
my $ret=shift->($page, $q, $session);
if (defined $ret) {
if ($ret eq "") {
$canedit=1;
}
elsif (ref $ret eq 'CODE') {
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$ret->() unless $nonfatal;
$canedit=0;
}
elsif (defined $ret) {
error($ret) unless $nonfatal;
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$canedit=0;
}
}
});
return $canedit;
} #}}}
sub decode_cgi_utf8 ($) { #{{{
my $cgi = shift;
foreach my $f ($cgi->param) {
$cgi->param($f, map { decode_utf8 $_ } $cgi->param($f));
}
} #}}}
# Check if the user is signed in. If not, redirect to the signin form and
# save their place to return to later.
sub needsignin ($$) { #{{{
my $q=shift;
my $session=shift;
if (! defined $session->param("name") ||
! userinfo_get($session->param("name"), "regdate")) {
$session->param(postsignin => $ENV{QUERY_STRING});
cgi_signin($q, $session);
cgi_savesession($session);
exit;
}
} #}}}
sub cgi_signin ($$) { #{{{
my $q=shift;
my $session=shift;
decode_cgi_utf8($q);
eval q{use CGI::FormBuilder};
error($@) if $@;
my $form = CGI::FormBuilder->new(
title => "signin",
name => "signin",
charset => "utf-8",
method => 'POST',
required => 'NONE',
javascript => 0,
params => $q,
action => $config{cgiurl},
header => 0,
template => {type => 'div'},
stylesheet => baseurl()."style.css",
);
my $buttons=["Login"];
if ($q->param("do") ne "signin" && !$form->submitted) {
$form->text(gettext("You need to log in first."));
}
$form->field(name => "do", type => "hidden", value => "signin",
force => 1);
run_hooks(formbuilder_setup => sub {
shift->(form => $form, cgi => $q, session => $session,
buttons => $buttons);
});
if ($form->submitted) {
$form->validate;
}
showform($form, $buttons, $session, $q);
} #}}}
sub cgi_postsignin ($$) { #{{{
my $q=shift;
my $session=shift;
# Continue with whatever was being done before the signin process.
if (defined $session->param("postsignin")) {
my $postsignin=CGI->new($session->param("postsignin"));
$session->clear("postsignin");
cgi($postsignin, $session);
cgi_savesession($session);
exit;
}
else {
error(gettext("login failed, perhaps you need to turn on cookies?"));
}
} #}}}
sub cgi_prefs ($$) { #{{{
my $q=shift;
my $session=shift;
needsignin($q, $session);
decode_cgi_utf8($q);
eval q{use CGI::FormBuilder};
error($@) if $@;
my $form = CGI::FormBuilder->new(
title => "preferences",
name => "preferences",
header => 0,
charset => "utf-8",
method => 'POST',
validate => {
email => 'EMAIL',
},
required => 'NONE',
javascript => 0,
params => $q,
action => $config{cgiurl},
template => {type => 'div'},
stylesheet => baseurl()."style.css",
fieldsets => [
[login => gettext("Login")],
[preferences => gettext("Preferences")],
[admin => gettext("Admin")]
],
);
my $buttons=["Save Preferences", "Logout", "Cancel"];
run_hooks(formbuilder_setup => sub {
shift->(form => $form, cgi => $q, session => $session,
buttons => $buttons);
});
$form->field(name => "do", type => "hidden");
$form->field(name => "email", size => 50, fieldset => "preferences");
$form->field(name => "banned_users", size => 50,
fieldset => "admin");
my $user_name=$session->param("name");
if (! is_admin($user_name)) {
$form->field(name => "banned_users", type => "hidden");
}
if (! $form->submitted) {
$form->field(name => "email", force => 1,
value => userinfo_get($user_name, "email"));
if (is_admin($user_name)) {
$form->field(name => "banned_users", force => 1,
value => join(" ", get_banned_users()));
}
}
if ($form->submitted eq 'Logout') {
$session->delete();
redirect($q, $config{url});
return;
}
elsif ($form->submitted eq 'Cancel') {
redirect($q, $config{url});
return;
}
elsif ($form->submitted eq 'Save Preferences' && $form->validate) {
if (defined $form->field('email')) {
userinfo_set($user_name, 'email', $form->field('email')) ||
error("failed to set email");
}
if (is_admin($user_name)) {
set_banned_users(grep { ! is_admin($_) }
split(' ',
$form->field("banned_users"))) ||
error("failed saving changes");
}
$form->text(gettext("Preferences saved."));
}
showform($form, $buttons, $session, $q);
} #}}}
sub cgi_editpage ($$) { #{{{
my $q=shift;
my $session=shift;
my @fields=qw(do rcsinfo subpage from page type editcontent comments);
my @buttons=("Save Page", "Preview", "Cancel");
decode_cgi_utf8($q);
eval q{use CGI::FormBuilder};
error($@) if $@;
my $form = CGI::FormBuilder->new(
title => "editpage",
fields => \@fields,
charset => "utf-8",
method => 'POST',
required => [qw{editcontent}],
javascript => 0,
params => $q,
action => $config{cgiurl},
header => 0,
table => 0,
template => scalar template_params("editpage.tmpl"),
wikiname => $config{wikiname},
);
run_hooks(formbuilder_setup => sub {
shift->(form => $form, cgi => $q, session => $session,
buttons => \@buttons);
});
# This untaint is safe because titlepage removes any problematic
# characters.
my ($page)=$form->field('page');
$page=titlepage(possibly_foolish_untaint($page));
if (! defined $page || ! length $page ||
file_pruned($page, $config{srcdir}) || $page=~/^\//) {
error("bad page name");
}
my $from;
if (defined $form->field('from')) {
($from)=$form->field('from')=~/$config{wiki_file_regexp}/;
}
my $file;
my $type;
if (exists $pagesources{$page} && $form->field("do") ne "create") {
$file=$pagesources{$page};
$type=pagetype($file);
if (! defined $type || $type=~/^_/) {
error(sprintf(gettext("%s is not an editable page"), $page));
}
if (! $form->submitted) {
$form->field(name => "rcsinfo",
value => rcs_prepedit($file), force => 1);
}
$form->field(name => "editcontent", validate => '/.*/');
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}
else {
$type=$form->param('type');
if (defined $type && length $type && $hooks{htmlize}{$type}) {
$type=possibly_foolish_untaint($type);
}
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elsif (defined $from && exists $pagesources{$from}) {
# favor the type of linking page
$type=pagetype($pagesources{$from});
}
$type=$config{default_pageext} unless defined $type;
$file=$page.".".$type;
if (! $form->submitted) {
$form->field(name => "rcsinfo", value => "", force => 1);
}
$form->field(name => "editcontent", validate => '/.+/');
}
$form->field(name => "do", type => 'hidden');
$form->field(name => "from", type => 'hidden');
$form->field(name => "rcsinfo", type => 'hidden');
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$form->field(name => "subpage", type => 'hidden');
$form->field(name => "page", value => pagetitle($page, 1), force => 1);
$form->field(name => "type", value => $type, force => 1);
$form->field(name => "comments", type => "text", size => 80);
$form->field(name => "editcontent", type => "textarea", rows => 20,
cols => 80);
$form->tmpl_param("can_commit", $config{rcs});
$form->tmpl_param("indexlink", indexlink());
$form->tmpl_param("helponformattinglink",
htmllink("", "", "ikiwiki/formatting",
noimageinline => 1,
linktext => "FormattingHelp"));
$form->tmpl_param("baseurl", baseurl());
if ($form->submitted eq "Cancel") {
if ($form->field("do") eq "create" && defined $from) {
redirect($q, "$config{url}/".htmlpage($from));
}
elsif ($form->field("do") eq "create") {
redirect($q, $config{url});
}
else {
redirect($q, "$config{url}/".htmlpage($page));
}
return;
}
elsif ($form->submitted eq "Preview") {
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my $content=$form->field('editcontent');
run_hooks(editcontent => sub {
$content=shift->(
content => $content,
page => $page,
cgi => $q,
session => $session,
);
});
$form->tmpl_param("page_preview",
htmlize($page, $type,
linkify($page, "/",
preprocess($page, "/",
filter($page, "/", $content), 0, 1))));
# previewing may have created files on disk
saveindex();
}
elsif ($form->submitted eq "Save Page") {
$form->tmpl_param("page_preview", "");
}
$form->tmpl_param("page_conflict", "");
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if ($form->submitted ne "Save Page" || ! $form->validate) {
if ($form->field("do") eq "create") {
my @page_locs;
my $best_loc;
if (! defined $from || ! length $from ||
$from ne $form->field('from') ||
file_pruned($from, $config{srcdir}) ||
$from=~/^\// ||
$form->submitted eq "Preview") {
@page_locs=$best_loc=$page;
}
else {
my $dir=$from."/";
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$dir=~s![^/]+/+$!!;
if ((defined $form->field('subpage') && length $form->field('subpage')) ||
$page eq gettext('discussion')) {
$best_loc="$from/$page";
}
else {
$best_loc=$dir.$page;
}
push @page_locs, $dir.$page;
push @page_locs, "$from/$page";
while (length $dir) {
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$dir=~s![^/]+/+$!!;
push @page_locs, $dir.$page;
}
push @page_locs, "$config{userdir}/$page"
if length $config{userdir};
}
@page_locs = grep {
! exists $pagecase{lc $_}
} @page_locs;
if (! @page_locs) {
# hmm, someone else made the page in the
# meantime?
if ($form->submitted eq "Preview") {
# let them go ahead with the edit
# and resolve the conflict at save
# time
@page_locs=$page;
}
else {
redirect($q, "$config{url}/".htmlpage($page));
return;
}
}
my @editable_locs = grep {
check_canedit($_, $q, $session, 1)
} @page_locs;
if (! @editable_locs) {
# let it throw an error this time
map { check_canedit($_, $q, $session) } @page_locs;
}
my @page_types;
if (exists $hooks{htmlize}) {
@page_types=grep { !/^_/ }
keys %{$hooks{htmlize}};
}
$form->tmpl_param("page_select", 1);
$form->field(name => "page", type => 'select',
options => [ map { pagetitle($_, 1) } @editable_locs ],
value => pagetitle($best_loc, 1));
$form->field(name => "type", type => 'select',
options => \@page_types);
$form->title(sprintf(gettext("creating %s"), pagetitle($page)));
}
elsif ($form->field("do") eq "edit") {
check_canedit($page, $q, $session);
if (! defined $form->field('editcontent') ||
! length $form->field('editcontent')) {
my $content="";
if (exists $pagesources{$page}) {
$content=readfile(srcfile($pagesources{$page}));
$content=~s/\n/\r\n/g;
}
$form->field(name => "editcontent", value => $content,
force => 1);
}
$form->tmpl_param("page_select", 0);
$form->field(name => "page", type => 'hidden');
$form->field(name => "type", type => 'hidden');
$form->title(sprintf(gettext("editing %s"), pagetitle($page)));
}
showform($form, \@buttons, $session, $q);
}
else {
# save page
check_canedit($page, $q, $session);
my $exists=-e "$config{srcdir}/$file";
if ($form->field("do") ne "create" && ! $exists &&
! eval { srcfile($file) }) {
$form->tmpl_param("page_gone", 1);
$form->field(name => "do", value => "create", force => 1);
$form->tmpl_param("page_select", 0);
$form->field(name => "page", type => 'hidden');
$form->field(name => "type", type => 'hidden');
$form->title(sprintf(gettext("editing %s"), $page));
showform($form, \@buttons, $session, $q);
return;
}
elsif ($form->field("do") eq "create" && $exists) {
$form->tmpl_param("creation_conflict", 1);
$form->field(name => "do", value => "edit", force => 1);
$form->tmpl_param("page_select", 0);
$form->field(name => "page", type => 'hidden');
$form->field(name => "type", type => 'hidden');
$form->title(sprintf(gettext("editing %s"), $page));
$form->field("editcontent",
value => readfile("$config{srcdir}/$file").
"\n\n\n".$form->field("editcontent"),
force => 1);
showform($form, \@buttons, $session, $q);
return;
}
my $content=$form->field('editcontent');
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run_hooks(editcontent => sub {
$content=shift->(
content => $content,
page => $page,
cgi => $q,
session => $session,
);
});
$content=~s/\r\n/\n/g;
$content=~s/\r/\n/g;
$content.="\n" if $content !~ /\n$/;
$config{cgi}=0; # avoid cgi error message
eval { writefile($file, $config{srcdir}, $content) };
$config{cgi}=1;
if ($@) {
$form->field(name => "rcsinfo", value => rcs_prepedit($file),
force => 1);
$form->tmpl_param("failed_save", 1);
$form->tmpl_param("error_message", $@);
$form->field("editcontent", value => $content, force => 1);
$form->tmpl_param("page_select", 0);
$form->field(name => "page", type => 'hidden');
$form->field(name => "type", type => 'hidden');
$form->title(sprintf(gettext("editing %s"), $page));
showform($form, \@buttons, $session, $q);
return;
}
my $conflict;
if ($config{rcs}) {
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my $message="";
if (defined $form->field('comments') &&
length $form->field('comments')) {
$message=$form->field('comments');
}
if (! $exists) {
rcs_add($file);
}
# Prevent deadlock with post-commit hook by
# signaling to it that it should not try to
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# do anything.
disable_commit_hook();
$conflict=rcs_commit($file, $message,
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$form->field("rcsinfo"),
$session->param("name"), $ENV{REMOTE_ADDR});
enable_commit_hook();
rcs_update();
}
# Refresh even if there was a conflict, since other changes
# may have been committed while the post-commit hook was
# disabled.
require IkiWiki::Render;
refresh();
saveindex();
if (defined $conflict) {
$form->field(name => "rcsinfo", value => rcs_prepedit($file),
force => 1);
$form->tmpl_param("page_conflict", 1);
$form->field("editcontent", value => $conflict, force => 1);
$form->field("do", "edit", force => 1);
$form->tmpl_param("page_select", 0);
$form->field(name => "page", type => 'hidden');
$form->field(name => "type", type => 'hidden');
$form->title(sprintf(gettext("editing %s"), $page));
showform($form, \@buttons, $session, $q);
return;
}
else {
# The trailing question mark tries to avoid broken
# caches and get the most recent version of the page.
redirect($q, "$config{url}/".htmlpage($page)."?updated");
}
}
} #}}}
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sub cgi_getsession ($) { #{{{
my $q=shift;
eval q{use CGI::Session};
CGI::Session->name("ikiwiki_session_".encode_utf8($config{wikiname}));
my $oldmask=umask(077);
my $session = CGI::Session->new("driver:DB_File", $q,
{ FileName => "$config{wikistatedir}/sessions.db" });
umask($oldmask);
return $session;
} #}}}
sub cgi_savesession ($) { #{{{
my $session=shift;
# Force session flush with safe umask.
my $oldmask=umask(077);
$session->flush;
umask($oldmask);
} #}}}
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sub cgi (;$$) { #{{{
my $q=shift;
my $session=shift;
if (! $q) {
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eval q{use CGI};
error($@) if $@;
$q=CGI->new;
run_hooks(cgi => sub { shift->($q) });
}
my $do=$q->param('do');
if (! defined $do || ! length $do) {
my $error = $q->cgi_error;
if ($error) {
error("Request not processed: $error");
}
else {
error("\"do\" parameter missing");
}
}
# Need to lock the wiki before getting a session.
lockwiki();
loadindex();
if (! $session) {
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$session=cgi_getsession($q);
}
# Auth hooks can sign a user in.
if ($do ne 'signin' && ! defined $session->param("name")) {
run_hooks(auth => sub {
shift->($q, $session)
});
if (defined $session->param("name")) {
# Make sure whatever user was authed is in the
# userinfo db.
if (! userinfo_get($session->param("name"), "regdate")) {
userinfo_setall($session->param("name"), {
email => "",
password => "",
regdate => time,
}) || error("failed adding user");
}
}
}
if (defined $session->param("name") &&
userinfo_get($session->param("name"), "banned")) {
print $q->header(-status => "403 Forbidden");
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$session->delete();
print gettext("You are banned.");
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cgi_savesession($session);
}
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run_hooks(sessioncgi => sub { shift->($q, $session) });
if ($do eq 'signin') {
cgi_signin($q, $session);
cgi_savesession($session);
}
elsif ($do eq 'prefs') {
cgi_prefs($q, $session);
}
elsif ($do eq 'create' || $do eq 'edit') {
cgi_editpage($q, $session);
}
elsif (defined $session->param("postsignin") || $do eq 'postsignin') {
cgi_postsignin($q, $session);
}
else {
error("unknown do parameter");
}
} #}}}
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