customGoogleAnalytics.php

<?php
/**
 * customGoogleAnalytics
 *
 * @author  riaf <riafweb@gmail.com>
 * @license New BSD License
 * @version $Id$
 */

/**
 * +++ Example +++
 * .htaccess
 * 
 * <code>
 * RewriteEngine on
 * RewriteRule ^(.*)$ customGoogleAnalytics.php?$1 [L]
 * </code>
 */

$filename = isset($_SERVER['QUERY_STRING'])? $_SERVER['QUERY_STRING']: '-';

$options = array(
    'utmwv' => 1,
    'utmn' => mt_rand(1000000000, 9999999999),
    'utmcs' => 'UTF-8',
    'utmul' => 'ja',
    'utmsr' => '-',
    'utmsc' => '-',
    'utmje' => '-',
    'utmfl' => '-',
    // 'utmcr' => 1,
    'utmdt' => '-',
    'utmhn' => isset($_SERVER['HTTP_HOST'])? $_SERVER['HTTP_HOST']: 'riaf.jp',
    'utmr' => '-',
    'utmp' => $filename,
    'utmac' => 'UA-XXXXXX-X',
    'utmcc' => get_utmcc(),
);

// var_dump($options);
$url = 'http://www.google-analytics.com/__utm.gif?'. http_build_query($options);

$request = 'GET '. $url. " HTTP/1.1\r\n";
if(isset($_SERVER['HTTP_ACCEPT_LANGUAGE']) && !empty($_SERVER['HTTP_ACCEPT_LANGUAGE'])){
    $request .= 'Accept-language: '. $_SERVER['HTTP_ACCEPT_LANGUAGE']. "\r\n";
}
if(isset($_SERVER['HTTP_USER_AGENT']) && !empty($_SERVER['HTTP_USER_AGENT'])){
    $request .= 'User-Agent: '. $_SERVER['HTTP_USER_AGENT']. "\r\n";
}
$request .= "\r\n";

$s = @fsockopen('www.google-analytics.com', 80, $errno, $errstr, 5);
$response = '';
if($s){
    fwrite($s, $request);
    stream_set_timeout($s, 5);
    while(!feof($s)){
        $response .= fgets($s, 4096);
    }
    fclose($s);
}

if($filename{0} == '/'){
    list(, $filename) = explode('/', $filename, 2);
}
if(is_public_file(dirname(__FILE__), $filename)){
    // recommend -> PEAR::File_Archive
    header('Content-Disposition: attachment; filename="'. basename($filename). '"');
    header('Content-Type: application/octet-stream');
    header('Content-Transfer-Encoding: binary');
    header('Content-Length: '.filesize($filename));
    readfile($filename);
} else die('File Not Found');

function get_utmcc(){
    if(isset($_COOKIE['__utma'])){
        list($ses,,,,, $id) = explode('.', $_COOKIE['__utma']);
    } else {
        $ses = mt_rand(10000000, 99999999);
        $id = mt_rand(1, 9);
    }
    $now = time();
    
    $__utma = isset($_COOKIE['__utma'])? $_COOKIE['__utma']:
        implode('.', array($ses, mt_rand(1000000000, 2147483647), $now, $now, $now, $id));
    $__utmb = isset($_COOKIE['__utmb'])? $_COOKIE['__utmb']: $ses;
    $__utmc = isset($_COOKIE['__utmc'])? $_COOKIE['__utmc']: $ses;
    $__utmz = isset($_COOKIE['__utmz'])? $_COOKIE['__utmz']:
        implode('.', array($ses, $now, $id, 2, 'utmccn=(direct)|utmcsr=(direct)|utmcmd=(none)'));
    return str_replace(array('=', '|', '+', ';'), array('%3D', '%7C', '%2B', '%3B'),
        sprintf('__utma=%s;+__utmb=%s;+__utmc=%s;+__utmz=%s;+', $__utma, $__utmb, $__utmc, $__utmz));
}

/**
 * is_public_file
 * 
 * @author  Keita Arai
 * @see     http://labs.unoh.net/2007/11/post_108.html
 */
function is_public_file($public_dir, $path)
{
    if(!is_string($path)){
        return false;
    }
    $realpath = realpath($path);
    if($realpath === false){
        return false;
    }
    if(file_exists($realpath) === false){
        return false;
    }
    if(strncmp($public_dir, $realpath, strlen($public_dir)) === false){
        return false;
    }
    return true;
}