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