Serendipity Forums

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"GET /index.php?/archives/97-Daitokai-in-Berlin.html HTTP/1.1" 200 19581 "-" "WordPress/2.2.1"
"POST /comment.php HTTP/1.0" 200 0 "-" "Incutio XML-RPC -- WordPress/2.2.1"

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<link rel="pingback" href="http://blog.brockha.us/comment.php?type=pingback&entry_id=97" />

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<link rel="pingback" href="http://blog.brockha.us/serendipity_xmlrpc.php" />

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/**
 * Receive a pingback
 *
 * @access public
 * @param   int     The entryid to receive a pingback for
 * @param   string  The foreign postdata to add
 * @return boolean
 */
function add_pingback ($id, $postdata) {
    global $serendipity;
    $sourceURI = getPingbackParam('sourceURI', $postdata);
    $targetURI = getPingbackParam('targetURI', $postdata);
    if (isset($sourceURI) && isset($targetURI)) {
        $path = parse_url($sourceURI);
        $local              = $targetURI;
        $comment['title']   = 'PingBack';
        $comment['url']     = $sourceURI;
        $comment['comment'] = '';
        $comment['name']    = $path['host'];

        serendipity_saveComment($id, $comment, 'PINGBACK');
        return 1;
    }
    if(preg_match('@<methodCall>\s*<methodName>\s*pingback.ping\s*</methodName>\s*' . '<params>\s*<param>\s*<value>\s*<string>([^<]*)</string>\s*</value>\s*</param>\s*' . '<param>\s*<value>\s*<string>([^<]*)</string>\s*</value>\s*</param>\s*</params>\s*' . '</methodCall>@is', $postdata, $matches)) {
        $remote             = $matches[1];
        $local              = $matches[2];
        $comment['title']   = '';
        $comment['url']     = $remote;
        $comment['comment'] = '';
        $comment['name']    = '';

        serendipity_saveComment($id, $comment, 'PINGBACK');
        return 1;
    }
    return 0;
}

/**
 * Gets a XML-RPC pingback.ping value by given parameter name
 * @access private
 * @param string Name of the paramameter
 * @param string Buffer containing the pingback XML
 */
function getPingbackParam($paramName, $data)
{
    $pattern = "<methodCall>.*?<methodName>\s*pingback.ping\s*</methodName>.*?<params>.*?<param>\s*" . "((<name>\s*$paramName\s*</name>\s*<value>\s*<string>([^<]*)</string>\s*</value>)|" . "(<value>\s*<string>([^<]*)</string>\s*</value>\s*<name>\s*$paramName\s*</name>))\s*" . "</param>.*?</params>.*?</methodCall>";
    if (preg_match('@' . $pattern .'@is',$data, $matches)) {
        return $matches[3];
    } else {
        return null;
    }
}

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/**
 * Fetch a list of trackbacks for an entry
 *
 * @access public
 * @param   int     The ID of the entry
 * @param   string  How many trackbacks to show
 * @param   boolean If true, also non-approved trackbacks will be shown
 * @return
 */
function &serendipity_fetchTrackbacks($id, $limit = null, $showAll = false) {
    global $serendipity;

    if (!$showAll) {
        $and = "AND status = 'approved'";
    }

    $query = "SELECT * FROM {$serendipity['dbPrefix']}comments WHERE entry_id = '". (int)$id ."' AND (type = 'TRACKBACK' OR type = 'PINGBACK') $and ORDER BY id";
    if (isset($limit)) {
        $limit  = serendipity_db_limit_sql($limit);
        $query .= " $limit";
    }

    $comments = serendipity_db_query($query);
    if (!is_array($comments)) {
        return array();
    }

    return $comments;
}