使用php充当shell脚本(转载)
任务:过滤出2010-08-18的apache访问日志,并放到本地数据库。
解决方案:写两个php文件解决这个问题
假定linux系统
假定全utf-8
假定php已经放在$PATH里
假如有这么一个日志/site/data/log/access_log_20100818,内容示例如下:
[120.42.16.230] [-] [-] [2010-08-17 08:36:41] [GET] [www.site.com] [/membercenter/ordinary/score] [] [HTTP/1.1] [200] [2585] [-] [Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1; Trident/4.0; QQDownload 618; GTB6.5; 360SE)][121.229.144.193] [-] [-] [2010-08-17 08:36:41] [GET] [www.site.com] [/bbs/jiehunzhenhao/wosikainv_49602.html] [] [HTTP/1.1] [200] [12631] [http://www.site.com/bbs/forum/jiehunzhenhao/filter/0/orderby/2/ascdesc/desc/page/4] [Mozilla/5.0 (Windows; U; Windows NT 5.1; zh-CN; rv:1.9.2.8) Gecko/20100722 Firefox/3.6.8][121.229.144.193] [-] [-] [2010-08-17 08:36:41] [POST] [www.site.com] [/bbsmanage/moderatorsetajax] [] [HTTP/1.1] [200] [21] [http://www.site.com/bbsmanage/moderatorset?id=4650] [Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; CIBA; 360SE)][60.190.125.3] [-] [-] [2010-08-17 08:36:41] [GET] [www.site.com] [/bbs/fangchanzatan/jiangjiatong_49458.html] [] [HTTP/1.1] [200] [10435] [http://www.site.com/membercenter/ordinary/bbssend?page=6] [Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1; Trident/4.0; SE 2.X)][118.120.207.138] [-] [-] [2010-08-17 08:36:41] [GET] [www.site.com] [/bbs/jingcaitietu/tianshangrenjian_51533.html] [] [HTTP/1.1] [200] [13418] [http://www.site.com/bbs/forum/jingcaitietu/] [Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; QQDownload 627; GTB6.5; Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1) ; .NET CLR 2.0.50727)][121.229.144.193] [-] [-] [2010-08-18 08:36:41] [GET] [www.site.com] [/bbsmanage/setmoderator] [] [HTTP/1.1] [200] [451] [http://www.site.com/mange/magframe] [Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; CIBA; 360SE)][121.229.144.193] [-] [-] [2010-08-18 08:36:42] [POST] [www.site.com] [/bbsmanage/moderatorxml] [] [HTTP/1.1] [200] [3699] [http://www.site.com/bbsmanage/setmoderator] [Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; CIBA; 360SE)][60.211.96.212] [-] [-] [2010-08-18 08:36:42] [GET] [www.site.com] [/member/index/id/7651] [] [HTTP/1.1] [200] [5308] [http://www.site.com/membercenter/ordinary/friend] [Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; SE 2.X; .NET CLR 2.0.50727; .NET CLR 4.0.20506)][113.205.59.70] [-] [-] [2010-08-18 08:36:43] [POST] [www.site.com] [/register/checkcaptcha] [] [HTTP/1.1] [200] [21] [http://www.site.com/register/ordinary/member_id/8326] [Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; .NET CLR 2.0.50727; .NET CLR 3.0.04506.648)][123.4.197.242] [-] [-] [2010-08-18 08:36:43] [GET] [www.site.com] [/bbsoperate/tuijian] [?act=tuijian&id=33936] [HTTP/1.1] [200] [4448] [-] [Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; CNCDialer)]。。。。。。。。。。
当然很大,几百M。
shell_filter.php文件内容如下:
#!/usr/local/php/bin/php<?phpinclude 'CommandPublic.php'; //这是公共文件$handle = fopen("php://stdin", "r");//这里获得命令行参数if (count($argv) > 1 ) $date = $argv[1];else $date = '2010-01-01'; //迭代$j =0;while (!feof($handle)) { $buffer = fgets($handle); process($buffer);}//关闭输入流,并结束fclose($handle);//筛选处理function process($str){ global $j; global $date; $str = strval($str); $str = trim($str); $str = preg_replace('#\n|\r\n#',"", $str); //首先要确保符合日志格式 if (preg_match('#\[.*?\] \[.*?\] \[.*?\] \[.*?\] \[.*?\] \[.*?\] \[.*?\] \[.*?\] \[.*?\] \[.*?\] \[.*?\] \[.*?\] \[.*?\]#', $str)) { if (!preg_match('#::1#', $str)) { //这是无用的记录 if (preg_match('#'. $date .'#', $str)) { //关键点,匹配 $j++; echo $str . "\n"; //这里通过管道输出到下一个文件 } } }}?>
文件save_echo.php内容如下:
#!/usr/local/php/bin/php<?phpinclude 'CommandPublic.php';$db = Sys::getdb2();$handle = fopen("php://stdin", "r");$i=0;while (!feof($handle)) { $i++; $buffer = fgets($handle); process($buffer,$i);}fclose($handle);//筛选处理function process($str,$i=0){ global $db; //正则截取出各字段内容 $ip = preg_replace('#^\[(.*?)\] \[.*?\] \[.*?\] \[(.*?)\] \[(.*?)\] \[(.*?)\] \[(.*?)\] \[.*?\] \[(.*?)\] \[(.*?)\] \[(.*?)\] \[(.*?)\] \[(.*?)\]$#', '$1|$2|$3|$4|$5|$6|$7|$8|$9|$10', $str); $arr = explode('|', $ip); $engine_name=''; $result = array( 'ip'=> $arr[0], 'access_time' => $arr[1], 'get_post'=> $arr[2], 'httphost' => $arr[3], 'url'=> $arr[4], 'http_type' => $arr[5], 'code'=> $arr[6], 'length' => $arr[7], 'source'=> $arr[8], 'agent' => substr( $arr[9],0, 250), 'engine_name' => $engine_name, ); $db->insert('table1', $result); //这里只是输出到控制台给人看 echo $i .': ' .$arr[1].' '. $arr[0] . "\n";}?>
最后
进入两个php文件所在目录,
cat /site/data/log/access_log_20100812 | php shell_filter.php 2010-08-18|php save_echo.php
解释:
cat输出日志文件内容,有缓冲,机器自动处理
管道至 shell_filter.php文件的输入
shell_filter.php文件截取出2010-08-18的记录并输出,如果愿意,可以改参数为任意日期,就截取那个日期的记录
管道至 save_echo.php文件的输入
save_echo.php文件保存记录到数据库,并有控制台输出提示。

The main advantages of using database storage sessions include persistence, scalability, and security. 1. Persistence: Even if the server restarts, the session data can remain unchanged. 2. Scalability: Applicable to distributed systems, ensuring that session data is synchronized between multiple servers. 3. Security: The database provides encrypted storage to protect sensitive information.

Implementing custom session processing in PHP can be done by implementing the SessionHandlerInterface interface. The specific steps include: 1) Creating a class that implements SessionHandlerInterface, such as CustomSessionHandler; 2) Rewriting methods in the interface (such as open, close, read, write, destroy, gc) to define the life cycle and storage method of session data; 3) Register a custom session processor in a PHP script and start the session. This allows data to be stored in media such as MySQL and Redis to improve performance, security and scalability.

SessionID is a mechanism used in web applications to track user session status. 1. It is a randomly generated string used to maintain user's identity information during multiple interactions between the user and the server. 2. The server generates and sends it to the client through cookies or URL parameters to help identify and associate these requests in multiple requests of the user. 3. Generation usually uses random algorithms to ensure uniqueness and unpredictability. 4. In actual development, in-memory databases such as Redis can be used to store session data to improve performance and security.

Managing sessions in stateless environments such as APIs can be achieved by using JWT or cookies. 1. JWT is suitable for statelessness and scalability, but it is large in size when it comes to big data. 2.Cookies are more traditional and easy to implement, but they need to be configured with caution to ensure security.

To protect the application from session-related XSS attacks, the following measures are required: 1. Set the HttpOnly and Secure flags to protect the session cookies. 2. Export codes for all user inputs. 3. Implement content security policy (CSP) to limit script sources. Through these policies, session-related XSS attacks can be effectively protected and user data can be ensured.

Methods to optimize PHP session performance include: 1. Delay session start, 2. Use database to store sessions, 3. Compress session data, 4. Manage session life cycle, and 5. Implement session sharing. These strategies can significantly improve the efficiency of applications in high concurrency environments.

Thesession.gc_maxlifetimesettinginPHPdeterminesthelifespanofsessiondata,setinseconds.1)It'sconfiguredinphp.iniorviaini_set().2)Abalanceisneededtoavoidperformanceissuesandunexpectedlogouts.3)PHP'sgarbagecollectionisprobabilistic,influencedbygc_probabi

In PHP, you can use the session_name() function to configure the session name. The specific steps are as follows: 1. Use the session_name() function to set the session name, such as session_name("my_session"). 2. After setting the session name, call session_start() to start the session. Configuring session names can avoid session data conflicts between multiple applications and enhance security, but pay attention to the uniqueness, security, length and setting timing of session names.


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