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Full pingback support, fallback trackback method for WordPress

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blogs. Thanks to brockha.us!
This commit is contained in:
Garvin Hicking
2007-07-06 10:17:47 +00:00
parent 822c908f99
commit c341f85b09
66 changed files with 329 additions and 19 deletions
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include/functions_trackbacks.inc.php
+67 -13
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@@ -34,6 +34,21 @@ function serendipity_trackback_is_success($resp) {
return true;
}
/**
* Check a HTTP response if it is a valid XML pingback response
*
* @access public
* @param string HTTP Response string
* @return mixed Boolean or error message
*/
function serendipity_pingback_is_success($resp) {
// This is very rudimentary, but the fault is printed later, so what..
if (preg_match('@<fault>@', $resp, $matches)) {
return false;
}
return true;
}
/**
* Perform a HTTP query for autodiscovering a pingback URL
*
@@ -49,6 +64,7 @@ global $serendipity;
} elseif (preg_match('@<link rel="pingback" href="([^"]+)" ?/?>@i', $body, $matches)) {
$pingback = $matches[1];
} else {
echo '<div>&#8226; ' . sprintf(PINGBACK_FAILED, PINGBACK_NOT_FOUND) . '</div>';
return;
}
@@ -68,8 +84,19 @@ global $serendipity;
</param>
</params>
</methodCall>";
_serendipity_send($pingback, $query);
return;
echo '<div>&#8226; ' . sprintf(PINGBACK_SENDING, htmlspecialchars($pingback)) . '</div>';
flush();
$response = _serendipity_send($pingback, $query, 'text/html');
$success = serendipity_pingback_is_success($response);
if ($success == true) {
echo '<div>&#8226; ' . 'PINGBACK: ' . PINGBACK_SENT .'</div>';
} else {
echo '<div>&#8226; ' . sprintf(PINGBACK_FAILED, $response) . '</div>';
}
return $success;
}
/**
@@ -80,7 +107,7 @@ global $serendipity;
* @param string The XML data with the trackback contents
* @return string Reponse
*/
function _serendipity_send($loc, $data) {
function _serendipity_send($loc, $data, $contenttype = null) {
global $serendipity;
$target = parse_url($loc);
@@ -99,6 +126,10 @@ function _serendipity_send($loc, $data) {
serendipity_request_start();
$req = &new HTTP_Request($uri, $options);
if (isset($contenttype)){
$req->addHeader('Content-Type', $contenttype);
}
$req->addRawPostData($data, true);
$res = $req->sendRequest();
@@ -127,14 +158,26 @@ function _serendipity_send($loc, $data) {
* @return string Response
*/
function serendipity_trackback_autodiscover($res, $loc, $url, $author, $title, $text, $loc2 = '') {
$is_wp = false;
$wp_check = false;
if (preg_match('@((' . preg_quote($loc, '@') . '|' . preg_quote($loc2, '@') . ')/?trackback/)@i', $res, $wp_loc)) {
// We found a WP-blog that may not advertise RDF-Tags!
$is_wp = true;
}
if (!preg_match('@trackback:ping(\s*rdf:resource)?\s*=\s*["\'](https?:[^"\']+)["\']@i', $res, $matches)) {
$matches = array();
serendipity_plugin_api::hook_event('backend_trackback_check', $matches, $loc);
// Plugins may say that a URI is valid, in situations where a blog has no valid RDF metadata
if (empty($matches[2])) {
echo '<div>&#8226; ' . sprintf(TRACKBACK_FAILED, TRACKBACK_NOT_FOUND) . '</div>';
return false;
if ($is_wp) {
$wp_check = true;
} else {
echo '<div>&#8226; ' . sprintf(TRACKBACK_FAILED, TRACKBACK_NOT_FOUND) . '</div>';
return false;
}
}
}
@@ -142,11 +185,20 @@ function serendipity_trackback_autodiscover($res, $loc, $url, $author, $title, $
if (preg_match('@dc:identifier\s*=\s*["\'](https?:[^\'"]+)["\']@i', $res, $test)) {
if ($loc != $test[1] && $loc2 != $test[1]) {
echo '<div>&#8226; ' . sprintf(TRACKBACK_FAILED, TRACKBACK_URI_MISMATCH) . '</div>';
return false;
if ($is_wp) {
$wp_check = true;
} else {
echo '<div>&#8226; ' . sprintf(TRACKBACK_FAILED, TRACKBACK_URI_MISMATCH) . '</div>';
return false;
}
}
}
// If $wp_check is set it means no RDF metadata was found, and we simply try the /trackback/ url.
if ($wp_check) {
$trackURI = $wp_loc[0];
}
$data = 'url=' . rawurlencode($url)
. '&title=' . rawurlencode($title)
. '&blog_name=' . rawurlencode($author)
@@ -227,8 +279,10 @@ global $serendipity;
serendipity_request_end();
if (strlen($fContent) != 0) {
serendipity_trackback_autodiscover($fContent, $parsed_loc, $url, $author, $title, $text, $loc);
serendipity_pingback_autodiscover($loc, $fContent);
$trackback_result = serendipity_trackback_autodiscover($fContent, $parsed_loc, $url, $author, $title, $text, $loc);
if ($trackback_result == false) {
serendipity_pingback_autodiscover($loc, $fContent);
}
} else {
echo '<div>&#8226; ' . TRACKBACK_NO_DATA . '</div>';
}
@@ -428,7 +482,7 @@ function serendipity_handle_references($id, $author, $title, $text, $dry_run = f
if ($dry_run) {
// Store the current list of references. We might need to restore them for later user.
$old_references = serendipity_db_query("SELECT * FROM {$serendipity['dbPrefix']}references WHERE (type = '' OR type IS NULL) AND entry_id = " . (int)$id, false, 'assoc');
if ($debug && is_string($old_references)) {
echo $old_references . "<br />\n";
}
@@ -545,7 +599,7 @@ function serendipity_handle_references($id, $author, $title, $text, $dry_run = f
for ($i = 0; $i < $j; ++$i) {
$i_link = serendipity_db_escape_string(strip_tags($names[$i]));
$i_location = serendipity_db_escape_string($locations[$i]);
// No link with same description AND same text should be inserted.
if (isset($duplicate_check[$i_location . $i_link])) {
continue;
@@ -575,13 +629,13 @@ function serendipity_handle_references($id, $author, $title, $text, $dry_run = f
);
$duplicate_check[$i_location . $i_link] = true;
}
if ($debug) {
echo "Current lookup for {$locations[$i]}{$names[$i]} is <pre>" . print_r($current_references[$locations[$i] . $names[$i]], true) . "</pre><br />\n";
echo $query . "<br />\n";
}
}
if ($debug) {
echo "Old/Saved locations: <pre>" . print_r($old_references, true) . "</pre><br />\n";
}