ThinkPHP/Library/Think/Dispatcher.class.php

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<?php
// +----------------------------------------------------------------------
// | ThinkPHP [ WE CAN DO IT JUST THINK IT ]
// +----------------------------------------------------------------------
// | Copyright (c) 2006-2014 http://thinkphp.cn All rights reserved.
// +----------------------------------------------------------------------
// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )
// +----------------------------------------------------------------------
// | Author: liu21st <liu21st@gmail.com>
// +----------------------------------------------------------------------
namespace Think;
/**
 * ThinkPHP内置的Dispatcher类
 * 完成URL解析、路由和调度
 */
class Dispatcher {

    /**
     * URL映射到控制器
     * @access public
     * @return void
     */
    static public function dispatch() {
        $varPath        =   C('VAR_PATHINFO');
        $varAddon       =   C('VAR_ADDON');
        $varModule      =   C('VAR_MODULE');
        $varController  =   C('VAR_CONTROLLER');
        $varAction      =   C('VAR_ACTION');
        $urlCase        =   C('URL_CASE_INSENSITIVE');
        if(isset($_GET[$varPath])) { // 判断URL里面是否有兼容模式参数
            $_SERVER['PATH_INFO'] = $_GET[$varPath];
            unset($_GET[$varPath]);
        }elseif(IS_CLI){ // CLI模式下 index.php module/controller/action/params/...
            $_SERVER['PATH_INFO'] = isset($_SERVER['argv'][1]) ? $_SERVER['argv'][1] : '';
        }

        // 开启子域名部署
        if(C('APP_SUB_DOMAIN_DEPLOY')) {
            $rules      = C('APP_SUB_DOMAIN_RULES');
            if(isset($rules[$_SERVER['HTTP_HOST']])) { // 完整域名或者IP配置
                define('APP_DOMAIN',$_SERVER['HTTP_HOST']); // 当前完整域名
                $rule = $rules[APP_DOMAIN];
            }else{
                if(strpos(C('APP_DOMAIN_SUFFIX'),'.')){ // com.cn net.cn 
                    $domain = array_slice(explode('.', $_SERVER['HTTP_HOST']), 0, -3);
                }else{
                    $domain = array_slice(explode('.', $_SERVER['HTTP_HOST']), 0, -2);                    
                }
                if(!empty($domain)) {
                    $subDomain = implode('.', $domain);
                    define('SUB_DOMAIN',$subDomain); // 当前完整子域名
                    $domain2   = array_pop($domain); // 二级域名
                    if($domain) { // 存在三级域名
                        $domain3 = array_pop($domain);
                    }
                    if(isset($rules[$subDomain])) { // 子域名
                        $rule = $rules[$subDomain];
                    }elseif(isset($rules['*.' . $domain2]) && !empty($domain3)){ // 泛三级域名
                        $rule = $rules['*.' . $domain2];
                        $panDomain = $domain3;