Add initial trackback support

This commit is contained in:
Evan Prodromou 2009-03-11 19:42:53 -04:00
parent 70d5fc4684
commit dfd9e31859

View File

@ -94,18 +94,25 @@ class LinkbackPlugin extends Plugin
return $orig;
}
$pb = null;
$tb = null;
if (array_key_exists('X-Pingback', $result->headers)) {
$endpoint = $result->headers['X-Pingback'];
$pb = $result->headers['X-Pingback'];
} else if (preg_match('/<link rel="pingback" href="([^"]+)" ?/?>/',
$result->body,
$match)) {
$endpoint = $match[1];
} else {
// XXX: do Trackback lookup
return $orig;
$pb = $match[1];
}
$tb = $this->getTrackback($result->body, $result->final_url);
if (!empty($tb)) {
$this->trackback($result->final_url, $tb);
} else if (!empty($pb)) {
$this->pingback($result->final_url, $pb);
}
$this->pingback($url, $endpoint);
return $orig;
}
@ -132,6 +139,82 @@ class LinkbackPlugin extends Plugin
}
}
// Largely cadged from trackback_cls.php by
// Ran Aroussi <ran@blogish.org>, GPL2
// http://phptrackback.sourceforge.net/
function getTrackback($text, $url)
{
if (preg_match_all('/(<rdf:RDF.*?<\/rdf:RDF>)/sm', $text, $match, PREG_SET_ORDER)) {
for ($i = 0; $i < count($match); $i++) {
if (preg_match('|dc:identifier="' . preg_quote($url) . '"|ms', $match[$i][1])) {
$rdf_array[] = trim($match[$i][1]);
}
}
// Loop through the RDFs array and extract trackback URIs
$tb_array = array(); // <- holds list of trackback URIs
if (!empty($rdf_array)) {
for ($i = 0; $i < count($rdf_array); $i++) {
if (preg_match('/trackback:ping="([^"]+)"/', $rdf_array[$i], $array)) {
$tb_array[] = trim($array[1]);
break;
}
}
}
// Return Trackbacks
if (empty($tb_array)) {
return null;
} else {
return $tb_array[0];
}
}
if (preg_match_all('/(<a[^>]*?rel=[\'"]trackback[\'"][^>]*?>)/', $text, $match)) {
foreach ($match[1] as $atag) {
if (preg_match('/href=[\'"]([^\'"]*?)[\'"]/', $atag, $url)) {
return $url[1];
}
}
}
return null;
}
function trackback($url, $endpoint)
{
$profile = $this->notice->getProfile();
$args = array('title' => sprintf(_('%1$s\'s status on %2$s'),
$profile->nickname,
common_exact_date($this->notice->created)),
'excerpt' => $this->notice->content,
'url' => $this->notice->uri,
'blog_name' => $profile->nickname);
$fetcher = Auth_Yadis_Yadis::getHTTPFetcher();
$result = $fetcher->post($endpoint,
http_build_query($args),
array('User-Agent: ' . $this->userAgent()));
if ($result->status != '200') {
common_log(LOG_WARNING,
"Trackback error for '$url' ($endpoint): ".
"$result->body");
} else {
common_log(LOG_INFO,
"Trackback success for '$url' ($endpoint): ".
"'$result->body'");
}
}
function userAgent()
{
return 'LinkbackPlugin/'.LINKBACKPLUGIN_VERSION .