discuz登录流程解析(版本X3.2)

discuz登录流程解析，最近在研究，Ucenter的同步登陆机制，就先从discuz的登录开始了

1.form表单提交

member.php?mod=logging&action=login&loginsubmit=yes&handlekey=login&loginhash=Lm137&inajax=1

处理脚本  source/module/member/member_logging.php

 

$ctl_obj = new logging_ctl();//初始化登陆对象,sourceclassclass_member.php=>class logging_ctl

 

$ctl_obj->setting = $_G['setting'];

$method = 'on_'.$_GET['action'];//$method='on_login';

$ctl_obj->template = 'member/login';

 

$ctl_obj->$method();//调用sourceclassclass_member.php=>on_login()

下面对sourceclassclass_member.php的on_login进行分析

 

2.sourceclassclass_member.php

   on_login函数太长，只贴出其核心部分，该函数也是登录过程中的核心函数，通过 userlogin（uc_clientcontroluser.php）进行数据分析，并对返回结果$result进行分析处理，返回结果$result['status']>0时，显示登陆成功，setloginstatus进行登录状态记录

$result = userlogin($_GET['username'], $_GET['password'], $_GET['questionid'], $_GET['answer'], $this->setting['autoidselect'] ? 'auto' : $_GET['loginfield'], $_G['clientip']);//95行左右，userlogin为核心处理函数，来至uc_clientclient.php//根据$result['status']返回值进行处理

············

if($result['status'] > 0) //当$result['status']>0时，为登陆成功

setloginstatus($result['member'], $_GET['cookietime'] ? 2592000 : 0);//记录登录状态，完成登录动作

下面对uc_clientclient.php的uc_user_login进行分析

 

3.uc_clientclient.php

函数uc_user_login通过call_user_func调用uc_clientcontroluser.php的onlogin函数

function uc_user_login($username, $password, $isuid = 0, $checkques = 0, $questionid = '', $answer = '', $ip = '') {

$isuid = intval($isuid);

$return = call_user_func(UC_API_FUNC, 'user', 'login', array('username'=>$username, 'password'=>$password, 'isuid'=>$isuid, 'checkques'=>$checkques, 'questionid'=>$questionid, 'answer'=>$answer, 'ip' => $ip));//UC_API_FUNC= uc_api_mysql，通过call_user_func回调调用uc_api_mysql,进行传参数，通过uc_api_mysql引入uc_clientcontroluser.php的onlogin函数

return UC_CONNECT == 'mysql' ? $return : uc_unserialize($return);

}

...................

function uc_api_mysql($model, $action, $args=array()) {

global $uc_controls;

if(empty($uc_controls[$model])) {

if(function_exists("mysql_connect")) {

include_once UC_ROOT.'./lib/db.class.php';

} else {

include_once UC_ROOT.'./lib/dbi.class.php';

}

include_once UC_ROOT.'./model/base.php';

include_once UC_ROOT."./control/$model.php";//引入uc_clientcontroluser.php

eval("$uc_controls['$model'] = new {$model}control();");

}

if($action{0} != '_') {

$args = uc_addslashes($args, 1, TRUE);

$action = 'on'.$action;

$uc_controls[$model]->input = $args;

return $uc_controls[$model]->$action($args);//调用uc_clientcontroluser.php的onlogin函数传参数

} else {

return '';

}

}

 

 

4.uc_clientcontroluser.php

onlogin函数对数据进行分析，返回结果，回第2步中sourceclassclass_member.php的

function onlogin() {

$this->init_input();

$isuid = $this->input('isuid');

$username = $this->input('username');

$password = $this->input('password');

$checkques = $this->input('checkques');

$questionid = $this->input('questionid');

$answer = $this->input('answer');

$ip = $this->input('ip');

 

$this->settings['login_failedtime'] = is_null($this->settings['login_failedtime']) ? 5 : $this->settings['login_failedtime'];

 

if($ip && $this->settings['login_failedtime'] && !$loginperm = $_ENV['user']->can_do_login($username, $ip)) {

$status = -4;

return array($status, '', $password, '', 0);

}

 

if($isuid == 1) {

$user = $_ENV['user']->get_user_by_uid($username);

} elseif($isuid == 2) {

$user = $_ENV['user']->get_user_by_email($username);

} else {

$user = $_ENV['user']->get_user_by_username($username);

}

 

$passwordmd5 = preg_match('/^w{32}$/', $password) ? $password : md5($password);

if(empty($user)) {

$status = -1;

} elseif($user['password'] != md5($passwordmd5.$user['salt'])) {

$status = -2;

} elseif($checkques && $user['secques'] != $_ENV['user']->quescrypt($questionid, $answer)) {

$status = -3;

} else {

$status = $user['uid'];

}

if($ip && $this->settings['login_failedtime'] && $status <= 0) {

$_ENV['user']->loginfailed($username, $ip);

}

$merge = $status != -1 && !$isuid && $_ENV['user']->check_mergeuser($username) ? 1 : 0;

return array($status, $user['username'], $password, $user['email'], $merge);

}

 

 

登录解析完成完成