PHP开源系统学习之fluxbb_2
谴责下某位同学,转载了我的上一篇文章,也不给个原文地址,希望这次再来转时能加上。
//检查登录,在common.php判断
//cookie串: 2|dc4fab5bb354be5104bae0affe2c1b615c565cf5|1384165106|eb084e693bb241a29e9986b62e69cf5f465f354d
//cookie有效期大于当前时间=》继续判断:用户cookie中保存的用户ID、生存周期、及预设置的cookie密钥,经过特殊处理后与$cookie['cookie_hash']比较
function check_cookie(&$pun_user)
{
global $db, $db_type, $pun_config, $cookie_name, $cookie_seed; $now = time(); // If the cookie is set and it matches the correct pattern, then read the values from it
if (isset($_COOKIE[$cookie_name]) && preg_match('%^(\d+)\|([0-9a-fA-F]+)\|(\d+)\|([0-9a-fA-F]+)$%', $_COOKIE[$cookie_name], $matches))
{
$cookie = array(
'user_id' => intval($matches[1]),
'password_hash' => $matches[2],
'expiration_time' => intval($matches[3]),
'cookie_hash' => $matches[4],
);
} // If it has a non-guest user, and hasn't expired
if (isset($cookie) && $cookie['user_id'] > 1 && $cookie['expiration_time'] > $now)
{
// If the cookie has been tampered with
if (forum_hmac($cookie['user_id'].'|'.$cookie['expiration_time'], $cookie_seed.'_cookie_hash') != $cookie['cookie_hash'])
{
$expire = $now + 31536000; // The cookie expires after a year
pun_setcookie(1, pun_hash(uniqid(rand(), true)), $expire);
set_default_user(); return;
}
...............
//从上面得到的$cookie变量中的user_id,去数据库查询取到密码,特殊处理后与$cookie中的password_hash比较
// Check if there's a user with the user ID and password hash from the cookie
$result = $db->query('SELECT u.*, g.*, o.logged, o.idle FROM '.$db->prefix.'users AS u INNER JOIN '.$db->prefix.'groups AS g ON u.group_id=g.g_id LEFT JOIN '.$db->prefix.'online AS o ON o.user_id=u.id WHERE u.id='.intval($cookie['user_id'])) or error('Unable to fetch user information', __FILE__, __LINE__, $db->error());
$pun_user = $db->fetch_assoc($result); // If user authorisation failed
if (!isset($pun_user['id']) || forum_hmac($pun_user['password'], $cookie_seed.'_password_hash') !== $cookie['password_hash'])
{
$expire = $now + 31536000; // The cookie expires after a year
pun_setcookie(1, pun_hash(uniqid(rand(), true)), $expire);
set_default_user(); return;
}
//退出 "login.php?action=out&id=2&csrf_token=40ce5abbaf76ba6fe66bb8a833eb9e8d4da5c273" ,此处没有直接删除cookie
//先判断用户是否已登录,链接是否有相应的标识
if ($action == 'out')
{
if ($pun_user['is_guest'] || !isset($_GET['id']) || $_GET['id'] != $pun_user['id'] || !isset($_GET['csrf_token']) || $_GET['csrf_token'] != pun_hash($pun_user['id'].pun_hash(get_remote_address())))
{
header('Location: index.php');
exit;
} // Remove user from "users online" list
$db->query('DELETE FROM '.$db->prefix.'online WHERE user_id='.$pun_user['id']) or error('Unable to delete from online list', __FILE__, __LINE__, $db->error()); // Update last_visit (make sure there's something to update it with)
if (isset($pun_user['logged']))
$db->query('UPDATE '.$db->prefix.'users SET last_visit='.$pun_user['logged'].' WHERE id='.$pun_user['id']) or error('Unable to update user visit data', __FILE__, __LINE__, $db->error()); pun_setcookie(1, pun_hash(uniqid(rand(), true)), time() + 31536000); redirect('index.php', $lang_login['Logout redirect']);
}
//get_remote_address()取远程IP,区分了是否用了代理
function get_remote_address()
{
$remote_addr = $_SERVER['REMOTE_ADDR']; // If we are behind a reverse proxy try to find the real users IP
if (defined('FORUM_BEHIND_REVERSE_PROXY'))
{
if (isset($_SERVER['HTTP_X_FORWARDED_FOR']))
{
// The general format of the field is:
// X-Forwarded-For: client1, proxy1, proxy2
// where the value is a comma+space separated list of IP addresses, the left-most being the farthest downstream client,
// and each successive proxy that passed the request adding the IP address where it received the request from.
$forwarded_for = explode(',', $_SERVER['HTTP_X_FORWARDED_FOR']);
$forwarded_for = trim($forwarded_for[0]); if (@preg_match('%^[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}$%', $forwarded_for) || @preg_match('%^((([0-9A-Fa-f]{1,4}:){7}[0-9A-Fa-f]{1,4})|(([0-9A-Fa-f]{1,4}:){6}:[0-9A-Fa-f]{1,4})|(([0-9A-Fa-f]{1,4}:){5}:([0-9A-Fa-f]{1,4}:)?[0-9A-Fa-f]{1,4})|(([0-9A-Fa-f]{1,4}:){4}:([0-9A-Fa-f]{1,4}:){0,2}[0-9A-Fa-f]{1,4})|(([0-9A-Fa-f]{1,4}:){3}:([0-9A-Fa-f]{1,4}:){0,3}[0-9A-Fa-f]{1,4})|(([0-9A-Fa-f]{1,4}:){2}:([0-9A-Fa-f]{1,4}:){0,4}[0-9A-Fa-f]{1,4})|(([0-9A-Fa-f]{1,4}:){6}((\b((25[0-5])|(1\d{2})|(2[0-4]\d)|(\d{1,2}))\b)\.){3}(\b((25[0-5])|(1\d{2})|(2[0-4]\d)|(\d{1,2}))\b))|(([0-9A-Fa-f]{1,4}:){0,5}:((\b((25[0-5])|(1\d{2})|(2[0-4]\d)|(\d{1,2}))\b)\.){3}(\b((25[0-5])|(1\d{2})|(2[0-4]\d)|(\d{1,2}))\b))|(::([0-9A-Fa-f]{1,4}:){0,5}((\b((25[0-5])|(1\d{2})|(2[0-4]\d)|(\d{1,2}))\b)\.){3}(\b((25[0-5])|(1\d{2})|(2[0-4]\d)|(\d{1,2}))\b))|([0-9A-Fa-f]{1,4}::([0-9A-Fa-f]{1,4}:){0,5}[0-9A-Fa-f]{1,4})|(::([0-9A-Fa-f]{1,4}:){0,6}[0-9A-Fa-f]{1,4})|(([0-9A-Fa-f]{1,4}:){1,7}:))$%', $forwarded_for))
$remote_addr = $forwarded_for;
}
} return $remote_addr;
}
//退出时cookie处理
pun_setcookie(1, pun_hash(uniqid(rand(), true)), time() + 31536000);
// Set a cookie, FluxBB style!
// Wrapper for forum_setcookie
//
function pun_setcookie($user_id, $password_hash, $expire)
{
global $cookie_name, $cookie_seed; forum_setcookie($cookie_name, $user_id.'|'.forum_hmac($password_hash, $cookie_seed.'_password_hash').'|'.$expire.'|'.forum_hmac($user_id.'|'.$expire, $cookie_seed.'_cookie_hash'), $expire);
} //
// Set a cookie, FluxBB style!
//
function forum_setcookie($name, $value, $expire)
{
global $cookie_path, $cookie_domain, $cookie_secure, $pun_config; if ($expire - time() - $pun_config['o_timeout_visit'] < 1)
$expire = 0; // Enable sending of a P3P header
header('P3P: CP="CUR ADM"'); if (version_compare(PHP_VERSION, '5.2.0', '>='))
setcookie($name, $value, $expire, $cookie_path, $cookie_domain, $cookie_secure, true);
else
setcookie($name, $value, $expire, $cookie_path.'; HttpOnly', $cookie_domain, $cookie_secure);
}
//定义一些通用函数,
如:error():
error('Unable to fetch user info', __FILE__, __LINE__, $db->error())
message($message, $no_back_link = false, $http_status = null)
utf8_trim( $str, $charlist=false); //去空格
redirect($destination_url, $message); //重定向
fluxbb多数页面都写在一个文件中,如login.php包括登录、退出、忘记密码等操作,通过不同的action区分。
引入公用header.php、不同页面分别替换相应的内容($pun_user变量),如title、要加载的css等。
$pun_user变量前面提到的check_cookie()函数中设置的值。
$pun_user = array();
check_cookie($pun_user);
function check_cookie(&$pun_user){} //注意后面的&地址符
check_cookie(函数中,通过cookie值来判断用户信息,如是合法的已登录用户,直接将一些值保存到$pun_user,否则设置一些默认值。通过set_default_user()函数,并记录在线用户。
//
// Fill $pun_user with default values (for guests)
//
function set_default_user()
{
global $db, $db_type, $pun_user, $pun_config; $remote_addr = get_remote_address(); // Fetch guest user
$result = $db->query('SELECT u.*, g.*, o.logged, o.last_post, o.last_search FROM '.$db->prefix.'users AS u INNER JOIN '.$db->prefix.'groups AS g ON u.group_id=g.g_id LEFT JOIN '.$db->prefix.'online AS o ON o.ident=\''.$db->escape($remote_addr).'\' WHERE u.id=1') or error('Unable to fetch guest information', __FILE__, __LINE__, $db->error());
if (!$db->num_rows($result))
exit('Unable to fetch guest information. Your database must contain both a guest user and a guest user group.'); $pun_user = $db->fetch_assoc($result); // Update online list
if (!$pun_user['logged'])
{
$pun_user['logged'] = time(); // With MySQL/MySQLi/SQLite, REPLACE INTO avoids a user having two rows in the online table
switch ($db_type)
{
case 'mysql':
case 'mysqli':
case 'mysql_innodb':
case 'mysqli_innodb':
case 'sqlite':
$db->query('REPLACE INTO '.$db->prefix.'online (user_id, ident, logged) VALUES(1, \''.$db->escape($remote_addr).'\', '.$pun_user['logged'].')') or error('Unable to insert into online list', __FILE__, __LINE__, $db->error());
break; default:
$db->query('INSERT INTO '.$db->prefix.'online (user_id, ident, logged) SELECT 1, \''.$db->escape($remote_addr).'\', '.$pun_user['logged'].' WHERE NOT EXISTS (SELECT 1 FROM '.$db->prefix.'online WHERE ident=\''.$db->escape($remote_addr).'\')') or error('Unable to insert into online list', __FILE__, __LINE__, $db->error());
break;
}
}
else
$db->query('UPDATE '.$db->prefix.'online SET logged='.time().' WHERE ident=\''.$db->escape($remote_addr).'\'') or error('Unable to update online list', __FILE__, __LINE__, $db->error()); $pun_user['disp_topics'] = $pun_config['o_disp_topics_default'];
$pun_user['disp_posts'] = $pun_config['o_disp_posts_default'];
$pun_user['timezone'] = $pun_config['o_default_timezone'];
$pun_user['dst'] = $pun_config['o_default_dst'];
$pun_user['language'] = $pun_config['o_default_lang'];
$pun_user['style'] = $pun_config['o_default_style'];
$pun_user['is_guest'] = true;
$pun_user['is_admmod'] = false;
}
//footer.php
页面header和footer内容通过$tpl_main变量保存,footer.php最后,exit($tpl_main);直接输出并终止运行。主要用到了输出缓冲的一些函数。
在整个fluxbb系统中,只看到了两个js文件,分别是common.js和minmax.js,而且两个文件都没超过3kb,其中minmax.js是在header.php引入了。想想自己,没有jquery就有点寸步难行了。
原文作者:lltong,博客园地址:http://www.cnblogs.com/lltong/
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