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provide ability to survive transport mangling when travelling through html networks

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This commit is contained in:
Friendika 2011-02-01 05:10:04 -08:00
parent 89313235d2
commit 8acc76a3c6
2 changed files with 36 additions and 18 deletions
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30
include/items.php
View file

@ -2,6 +2,7 @@
require_once('bbcode.php');
require_once('oembed.php');
require_once('include/salmon.php');
function get_feed_for(&$a, $dfrn_id, $owner_nick, $last_update, $direction = 0) {
@ -376,6 +377,21 @@ function get_atom_elements($feed,$item) {
}
/**
* If there's a copy of the body content which is guaranteed to have survived mangling in transit, use it.
*/
$have_real_body = false;
$rawenv = $item->get_item_tags(NAMESPACE_DFRN, 'env');
if($rawenv) {
$have_real_body = true;
$res['body'] = $rawenv[0]['data'];
$res['body'] = str_replace(array(' ',"\t","\r","\n"), array('','','',''),$res['body']);
$res['body'] = base64url_decode($res['body']);
$res['realbody'] = true;
}
$maxlen = get_max_import_size();
if($maxlen && (strlen($res['body']) > $maxlen))
$res['body'] = substr($res['body'],0, $maxlen);
@ -391,7 +407,7 @@ function get_atom_elements($feed,$item) {
// html.
if((strpos($res['body'],'<')) || (strpos($res['body'],'>'))) {
if((! $have_real_body) || (strpos($res['body'],'<')) || (strpos($res['body'],'>'))) {
$res['body'] = preg_replace('#<object[^>]+>.+?' . 'http://www.youtube.com/((?:v|cp)/[A-Za-z0-9\-_=]+).+?</object>#s',
'[youtube]$1[/youtube]', $res['body']);
@ -643,18 +659,21 @@ function item_store($arr) {
$arr['private'] = ((x($arr,'private')) ? intval($arr['private']) : 0 );
$arr['body'] = ((x($arr,'body')) ? escape_tags(trim($arr['body'])) : '');
// The content body has been through a lot of filtering and transport escaping by now.
// The content body may have been through a lot of filtering and transport escaping by now.
// We don't want to skip any filters, however a side effect of all this filtering
// is that ampersands and <> may have been double encoded, depending on which filter chain
// they came through.
// they came through. The presence of $res['realbody'] means we have something encoded in a
// transport safe manner at the source and does not require any filter corrections.
if(x($arr,'realbody'))
unset($arr['realbody']);
else {
$arr['body'] = str_replace(
array('&amp;amp;', '&amp;gt;', '&amp;lt;', '&amp;quot;'),
array('&amp;' , '&gt;' , '&lt;', '&quot;'),
$arr['body']
);
}
if($arr['parent-uri'] === $arr['uri']) {
$parent_id = 0;
@ -1421,6 +1440,7 @@ function atom_entry($item,$type,$author,$owner,$comment = false) {
$o .= '<title>' . xmlify($item['title']) . '</title>' . "\r\n";
$o .= '<published>' . xmlify(datetime_convert('UTC','UTC',$item['created'] . '+00:00',ATOM_TIME)) . '</published>' . "\r\n";
$o .= '<updated>' . xmlify(datetime_convert('UTC','UTC',$item['edited'] . '+00:00',ATOM_TIME)) . '</updated>' . "\r\n";
$o .= '<dfrn:env>' . base64url_encode($item['body'], true) . '</dfrn:env>' . "\r\n";
$o .= '<content type="' . $type . '" >' . xmlify(($type === 'html') ? bbcode($item['body']) : $item['body']) . '</content>' . "\r\n";
$o .= '<link rel="alternate" href="' . xmlify($a->get_baseurl() . '/display/' . $owner['nickname'] . '/' . $item['id']) . '" />' . "\r\n";
if($comment)

14
include/salmon.php
View file

@ -18,15 +18,13 @@ function salmon_key($pubkey) {
}
function base64url_encode($s) {
function base64url_encode($s, $strip_padding = false) {
$s = strtr(base64_encode($s),'+/','-_');
/*
* // placeholder for un-padded base64url_encode
* // per latest salmon rev
*
* $s = str_replace('=','',$s);
*
*/
if($strip_padding)
$s = str_replace('=','',$s);
return $s;
}