log js and non js accesses

action.php

<?php
/**
 * DokuWiki Plugin jscheck (Action Component)
 *
 * @license GPL 2 http://www.gnu.org/licenses/gpl-2.0.html
 * @author  Andreas Gohr <[email protected]>
 */

// must be run within Dokuwiki
if(!defined('DOKU_INC')) die();

class action_plugin_jscheck extends DokuWiki_Action_Plugin {

    private $visitor_id;
    private $sequence_id;


    /**
     * Registers a callback function for a given event
     *
     * @param Doku_Event_Handler $controller DokuWiki's event controller object
     * @return void
     */
    public function register(Doku_Event_Handler $controller) {
       $controller->register_hook('DOKUWIKI_STARTED', 'AFTER', $this, 'handle_dokuwiki_started');
       $controller->register_hook('TPL_CONTENT_DISPLAY', 'AFTER', $this, 'handle_content_display');
       $controller->register_hook('AJAX_CALL_UNKNOWN', 'BEFORE', $this, 'handle_ajax');
    }

    /**
     * initialize sequence and visitor
     *
     * @param Doku_Event $event
     * @param $param
     */
    public function handle_dokuwiki_started(Doku_Event $event, $param) {
        $this->initIDs();
    }

    /**
     * log the non JS visit and output script
     *
     * @param Doku_Event $event
     * @param $param
     */
    public function handle_content_display(Doku_Event $event, $param) {
        $this->writeLog(false);

        $self = DOKU_BASE . 'lib/exe/ajax.php?t='.time();
        $sequ = hsc($this->sequence_id);

        echo preg_replace('/\s+/', '', "
        <script>
            /* JsCheck */
            jQuery(function(){
                jQuery.post(
                    '$self',
                    {
                        call: 'jscheck',
                        sequence_id: '$sequ'
                    }
                );
            });
        </script>
        ");
    }

    /**
     * log the JS visit
     *
     * @param Doku_Event $event
     * @param $param
     */
    public function handle_ajax(Doku_Event $event, $param) {
        if($event->data != 'jscheck') return;
        $event->preventDefault();
        $event->stopPropagation();

        $this->initIDs();

        // "all cache killers known to man"
        header("Last-Modified: " . gmdate("D, d M Y H:i:s") . " GMT");
        header("Cache-Control: no-store, no-cache, must-revalidate, max-age=0"); // HTTP/1.1
        header("Cache-Control: post-check=0, pre-check=0", false);
        header("Pragma: no-cache"); // HTTP/1.0
        header("Expires: Sat, 26 Jul 1997 05:00:00 GMT"); // Date in the past

        $this->writeLog(true);
    }


    /**
     * log the access
     *
     * @param boolean $isjs is this a javascript call?
     */
    private function writeLog($isjs) {
        global $conf;

        $logfile = $conf['cachedir'] . '/jscheck.log';

        $now = explode(' ', microtime());
        $now = $now[1].'.'.substr($now[0], 2);

        $log = join("\t", array(
            $now,
            $_SERVER['REMOTE_USER'] ? $_SERVER['REMOTE_USER'] : '-',
            $this->visitor_id,
            $this->sequence_id,
            $isjs ? 'js' : 'all',
            $_SERVER['HTTP_USER_AGENT']
        ));
        $log .= "\n";

        file_put_contents($logfile, $log, FILE_APPEND);
    }

    /**
     * initialize the visitor and sequence id
     */
    private function initIDs() {
        global $conf;

        if (!isset($_COOKIE['visitorid'])) {
            $expire = time() + 3 * 30 * 24 * 60 * 60;
            $this->visitor_id = uniqid('v-', true);
            setcookie('visitorid', $this->visitor_id, $expire, DOKU_SESSION_PATH, '', ($conf['securecookie'] && is_ssl()),
                true);
        } else {
            $this->visitor_id = $_COOKIE['visitorid'];
        }

        if(isset($_REQUEST['sequence_id'])) {
            $this->sequence_id = $_REQUEST['sequence_id'];
        } else {
            $this->sequence_id = uniqid('s-', true);
        }
    }

}

// vim:ts=4:sw=4:et: