【发布时间】：2012-01-18 19:06:10
【问题描述】：
好的，这就是场景：我需要解析我的日志，以查找在没有实际查看“大图像”页面的情况下下载了多少次图像缩略图...... 这基本上是一个基于“拇指”与“完整”图像视图比率的盗链保护系统
考虑到服务器不断受到缩略图请求的轰炸，最有效的解决方案似乎是使用缓冲的 apache 日志，每隔 1Mb 写入磁盘一次，然后定期解析日志
我的问题是：如何在 PHP 中解析 apache 日志以保存数据，以下是正确的：
- 日志将被实时使用和更新，我需要我的 PHP 脚本能够在此过程中读取它
- php 脚本必须“记住”它读取的日志的哪些部分，以免重复读取同一部分并歪曲数据
- 内存消耗应保持在最低限度，因为日志可以在几个小时内轻松达到 10Gb 的数据
php 记录器脚本将每 60 秒调用一次，并在此期间处理它可以处理的任何数量的日志行..
我曾尝试一起破解一些代码，但我在使用最少的内存时遇到了问题，找到了一种方法来跟踪具有“移动”文件大小的指针
这是日志的一部分：
212.180.168.244 - - [18/Jan/2012:20:06:57 +0100] "GET /t/0/11/11441/11441268.jpg HTTP/1.1" 200 3072 "-" "Opera/9.80 (Windows NT 6.1; U; pl) Presto/2.10.229 Version/11.60" "-"
122.53.168.123 - - [18/Jan/2012:20:06:57 +0100] "GET /t/0/11/11441/11441276.jpg HTTP/1.1" 200 3007 "-" "Opera/9.80 (Windows NT 6.1; U; pl) Presto/2.10.229 Version/11.60" "-"
143.22.203.211 - - [18/Jan/2012:20:06:57 +0100] "GET /t/0/11/11441/11441282.jpg HTTP/1.1" 200 4670 "-" "Opera/9.80 (Windows NT 6.1; U; pl) Presto/2.10.229 Version/11.60" "-"
在此处附上代码供您查看：
<?php
//limit for running it every minute
error_reporting(E_ALL);
ini_set('display_errors',1);
set_time_limit(0);
include(dirname(__FILE__).'/../kframework/kcore.class.php');
$aj = new kajaxpage;
$aj->use_db=1;
$aj->init();
$db=kdbhandler::getInstance();
$d=kdebug::getInstance();
$d->debug=TRUE;
$d->verbose=TRUE;
$log_file = "/var/log/nginx/access.log"; //full path to log file when run by cron
$pid_file = dirname(__FILE__)."/../kframework/cron/cron_log.pid";
//$images_id = array("8308086", "7485151", "6666231", "8343336");
if (file_exists($pid_file)) {
$pid = file_get_contents($pid_file);
$temp = explode(" ", $pid);
$pid_timestamp = $temp[0];
$now_timestamp = strtotime("now");
//if (($now_timestamp - $pid_timestamp) < 90) return;
$pointer = $temp[1];
if ($pointer > filesize($log_file)) $pointer = 0;
}
else $pointer = 0;
$pattern = "/([0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3})[^\[]*\[([^\]]*)\][^\"]*\"([^\"]*)\"\s([0-9]*)\s([0-9]*)(.*)/";
$last_time = 0;
$lines_processed=0;
if ($fp = fopen($log_file, "r+")) {
fseek($fp, $pointer);
while (!feof($fp)) {
//if ($lines_processed>100) exit;
$lines_processed++;
$log_line = trim(fgets($fp));
if (!empty($log_line)) {
preg_match_all($pattern, $log_line, $matches);
//print_r($matches);
$size = $matches[5][0];
$matches[3][0] = str_replace("GET ", "", $matches[3][0]);
$matches[3][0] = str_replace("HTTP/1.1", "", $matches[3][0]);
$matches[3][0] = str_replace(".jpg/", ".jpg", $matches[3][0]);
if (substr($matches[3][0],0,3) == "/t/") {
$get = explode("-",end(explode("/",$matches[3][0])));
$imgid = $get[0];
$type='thumb';
}
elseif (substr($matches[3][0], 0, 5) == "/img/") {
$get1 = explode("/", $matches[3][0]);
$get2 = explode("-", $get1[2]);
$imgid = $get2[0];
$type='raw';
}
echo $matches[3][0];
// put here your sql insert or update
$imgid=(int) $imgid;
if (isset($type) && $imgid!=1) {
switch ($type) {
case 'thumb':
//use the second slave in the registry
$sql=$db->slave_query("INSERT INTO hotlink SET thumbviews=1, imageid=".$imgid." ON DUPLICATE KEY UPDATE thumbviews=thumbviews+1 ",2);
echo "INSERT INTO hotlink SET thumbviews=1, imageid=".$imgid." ON DUPLICATE KEY UPDATE thumbviews=thumbviews+1";
break;
case 'raw':
//use the second slave in the registry
$sql=$db->slave_query("INSERT INTO hotlink SET rawviews=1, imageid=".$imgid." ON DUPLICATE KEY UPDATE rawviews=rawviews+1",2);
echo "INSERT INTO hotlink SET rawviews=1, imageid=".$imgid." ON DUPLICATE KEY UPDATE rawviews=rawviews+1";
break;
}
}
// $imgid - image ID
// $size - image size
$timestamp = strtotime("now");
if (($timestamp - $last_time) > 30) {
file_put_contents($pid_file, $timestamp . " " . ftell($fp));
$last_time = $timestamp;
}
}
}
file_put_contents($pid_file, (strtotime("now") - 95) . " " . ftell($fp));
fclose($fp);
}
?>
【问题讨论】：