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wiki/scripts/urlapprove.php Executable file
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<?php if (!defined('PmWiki')) exit();
/* Copyright 2004-2013 Patrick R. Michaud (pmichaud@pobox.com)
This file is part of PmWiki; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published
by the Free Software Foundation; either version 2 of the License, or
(at your option) any later version. See pmwiki.php for full details.
This script provides a URL-approval capability. To enable this
script, add the following line to a configuration file:
include_once('scripts/urlapprove.php');
The URL prefixes to be allowed are stored as patterns in
$WhiteUrlPatterns. This array can be loaded from config.php, or
from the wiki pages given by the $ApprovedUrlPagesFmt[] array.
Any http: or https: URL that isn't in $WhiteUrlPatterns is rendered
using $UnapprovedLinkFmt.
The script also provides ?action=approveurls and ?action=approvesites,
which scan the current page for any new URLs to be automatically added
the first page of $UrlApprovalPagesFmt.
Finally, the script will block any post containing more than
$UnapprovedLinkCountMax unapproved urls in it. By default this
is set to a very large number, leaving the posting of unapproved
urls wide open, but by setting $UnapprovedLinkCountMax to a smaller
number you can limit the number of unapproved urls that make it into
a page. (Wikispammers seem to like to post long lists of urls, while
more "normal" authors tend to only post a few.)
*/
$LinkFunctions['http:'] = 'LinkHTTP';
$LinkFunctions['https:'] = 'LinkHTTP';
SDV($ApprovedUrlPagesFmt, array('$SiteAdminGroup.ApprovedUrls'));
SDV($UnapprovedLinkFmt,
"\$LinkText<a class='apprlink' href='{\$PageUrl}?action=approvesites'>$[(approve sites)]</a>");
$HTMLStylesFmt['urlapprove'] = '.apprlink { font-size:smaller; }';
SDV($ApproveUrlPattern,
"\\bhttps?:[^\\s$UrlExcludeChars]*[^\\s.,?!$UrlExcludeChars]");
$WhiteUrlPatterns = (array)$WhiteUrlPatterns;
SDV($HandleActions['approveurls'], 'HandleApprove');
SDV($HandleAuth['approveurls'], 'edit');
SDV($HandleActions['approvesites'], 'HandleApprove');
SDV($HandleAuth['approvesites'], 'edit');
SDV($UnapprovedLinkCountMax, 1000000);
array_splice($EditFunctions, array_search('PostPage', $EditFunctions),
0, 'BlockUnapprovedPosts');
function LinkHTTP($pagename,$imap,$path,$alt,$txt,$fmt=NULL) {
global $EnableUrlApprovalRequired, $IMap, $WhiteUrlPatterns, $FmtV,
$UnapprovedLink, $UnapprovedLinkCount, $UnapprovedLinkFmt;
if (!IsEnabled($EnableUrlApprovalRequired,1))
return LinkIMap($pagename,$imap,$path,$alt,$txt,$fmt);
static $havereadpages;
if (!$havereadpages) { ReadApprovedUrls($pagename); $havereadpages=true; }
$p = str_replace(' ','%20',$path);
$url = str_replace('$1',$p,$IMap[$imap]);
if (!isset($UnapprovedLink)) $UnapprovedLink = array();
foreach((array)$WhiteUrlPatterns as $pat) {
if (preg_match("!^$pat(/|$)!i",$url))
return LinkIMap($pagename,$imap,$path,$alt,$txt,$fmt);
}
$FmtV['$LinkUrl'] = PUE(str_replace('$1',$path,$IMap[$imap]));
$FmtV['$LinkText'] = $txt;
$FmtV['$LinkAlt'] = str_replace(array('"',"'"),array('&#34;','&#39;'),$alt);
$UnapprovedLink[] = $url;
@$UnapprovedLinkCount++;
return FmtPageName($UnapprovedLinkFmt,$pagename);
}
function ReadApprovedUrls($pagename) {
global $ApprovedUrlPagesFmt,$ApproveUrlPattern,$WhiteUrlPatterns;
foreach((array)$ApprovedUrlPagesFmt as $p) {
$pn = FmtPageName($p, $pagename);
StopWatch("ReadApprovedUrls $pn begin");
$apage = ReadPage($pn, READPAGE_CURRENT);
preg_match_all("/$ApproveUrlPattern/",@$apage['text'],$match);
foreach($match[0] as $a)
$WhiteUrlPatterns[] = preg_quote($a,'!');
StopWatch("ReadApprovedUrls $pn end");
}
}
function HandleApprove($pagename, $auth='edit') {
global $ApproveUrlPattern,$WhiteUrlPatterns,$ApprovedUrlPagesFmt,$action;
Lock(2);
$page = ReadPage($pagename);
$text = preg_replace('/[()]/','',$page['text']);
preg_match_all("/$ApproveUrlPattern/",$text,$match);
ReadApprovedUrls($pagename);
$addpat = array();
foreach($match[0] as $a) {
if ($action=='approvesites')
$a=preg_replace("!^([^:]+://[^/]+).*$!",'$1',$a);
$addpat[] = $a;
}
if (count($addpat)>0) {
$aname = FmtPageName($ApprovedUrlPagesFmt[0],$pagename);
$apage = RetrieveAuthPage($aname, $auth);
if (!$apage) Abort("?cannot edit $aname");
$new = $apage;
if (substr($new['text'],-1,1)!="\n") $new['text'].="\n";
foreach($addpat as $a) {
foreach((array)$WhiteUrlPatterns as $pat)
if (preg_match("!^$pat(/|$)!i",$a)) continue 2;
$urlp = preg_quote($a,'!');
$WhiteUrlPatterns[] = $urlp;
$new['text'].=" $a\n";
}
$_POST['post'] = 'y';
PostPage($aname,$apage,$new);
}
Redirect($pagename);
}
function BlockUnapprovedPosts($pagename, &$page, &$new) {
global $EnableUrlApprovalRequired, $UnapprovedLinkCount,
$UnapprovedLinkCountMax, $EnablePost, $MessagesFmt, $BlockMessageFmt;
if (!IsEnabled($EnableUrlApprovalRequired, 1)) return;
if ($UnapprovedLinkCount <= $UnapprovedLinkCountMax) return;
if ($page['=auth']['admin']) return;
$EnablePost = 0;
$MessagesFmt[] = $BlockMessageFmt;
$MessagesFmt[] = XL('Too many unapproved external links.');
}