[TOC]
看了前面的目录结构介绍，我们知道`mobile`目录是代表前端app，`web`目录是代表后台的。
现在举例一个链接地址:
[http://guli.com/app/index.php?i=4&c=entry&m=ewei\_shopv2&do=mobile&r=shop.category&mid=2985&v=159279](http://guli.com/app/index.php?i=4&c=entry&m=ewei_shopv2&do=mobile&r=shop.category&mid=2985&v=159279)
参数r前的链接是微擎的路由规则，具体参考微擎的官方文档教程，这里就不做解释了。链接中的
`r=shop.category&mid=2985&v=159279` ,其中的` r=shop.category`，这里是人人商城的路由访问地
址现在先看看人人商城路由的的路由加载原理:
**1**.路由一开始访问，首先进入的是 ` ewei_shopv2/site.php `文件，根据 参数 do 来访问后台，还是mobile前端，
而执行图中红框划着对应的方法
**2**.方法中的 m('route')->run(); ,是调用路由的加载, m('route') 是指加载 ewei_shopv2/core/model 目录下的
route.php,打开这个文件，就一个run方法,代码都是处理路由相关的，看以下代码注释
```
class Route_EweiShopV2Model {
function run($isweb = true)
{
global $_GPC, $_W;
//加载第三方类库插件
// autoload
if (version_compare(EWEI_SHOPV2_VERSION, '3.14.0', '>=')) {
@include_once EWEI_SHOPV2_PATH . 'vendor/autoload.php';
}
//page.php 文件是包含对加载，渲染模板的一些方法
require_once IA_ROOT . "/addons/ewei_shopv2/core/inc/page.php";
//判断是访问app端还是后台。加载对应文件，此2个文件都是处理加载插件，权限等
if ($isweb) {
require_once EWEI_SHOPV2_CORE . "inc/page_web.php";
require_once EWEI_SHOPV2_CORE . "inc/page_web_com.php";
} else{
require_once EWEI_SHOPV2_CORE . "inc/page_mobile.php";
require_once EWEI_SHOPV2_CORE . "inc/page_mobile_login.php";
}
//处理链接中的参数r
$r = str_replace("//", "/", trim($_GPC['r'], "/"));
$routes = explode('.', $r);
$segs = count($routes);
$method = "main";
$root = $isweb ? EWEI_SHOPV2_CORE_WEB : EWEI_SHOPV2_CORE_MOBILE;
$isMerch = false;
$isNewstore = false;
//如果参数r为空，则设置默认路由
if(strexists($_W['siteurl'] ,"web/merchant.php")) {
if(empty($r)) {
$r = "merch.manage";
$routes = explode('.', $r);
}
$isMerch = true;
$isplugin = true;
} else if(strexists($_W['siteurl'] ,"web/newstoreant.php")) {
if(empty($r)) {
$r = "newstore.manage";
$routes = explode('.', $r);
}
$isNewstore = true;
$isplugin = true;
} else{
$isplugin = !empty($r) && is_dir(EWEI_SHOPV2_PLUGIN . $routes[0]);
}
//判断参数r是否访问插件模块
if ($isplugin) {
if ($isweb) {
require_once EWEI_SHOPV2_CORE . "inc/page_web_plugin.php";
} else {
require_once EWEI_SHOPV2_CORE . "inc/page_mobile_plugin.php";
require_once EWEI_SHOPV2_CORE . "inc/page_mobile_plugin_login.php";
require_once EWEI_SHOPV2_CORE . "inc/page_mobile_plugin_pf.php";
}
//core目录为人人商城的核心目录
$_W['plugin'] = $routes[0];
$root = EWEI_SHOPV2_PLUGIN . $routes[0] . "/core/" . ( $isweb ? "web" : "mobile") . "/";
if($isMerch){
$_W['plugin'] ="merch";
$root = EWEI_SHOPV2_PLUGIN . "merch/core/web/manage/";
} else if($isNewstore){
$_W['plugin'] ="newstore";
$root = EWEI_SHOPV2_PLUGIN . "newstore/core/web/manage/";
}
else{
$routes = array_slice($routes, 1);
}
$segs = count($routes);
} else if($routes[0]=='system'){
require_once EWEI_SHOPV2_CORE . "inc/page_system.php";
}
//$segs 为参数r , 按"." 字符explode处理后得到的数组
switch ($segs) {
case 0: {
//数组个数为空访问默认首页
$file = $root . "index.php";
$class = "Index";
}
case 1: {
$file = $root . $routes[0] . ".php";
//数组个数为1个时访问指定模块
if (is_file($file)) {
$class = ucfirst($routes[0]);
} elseif (is_dir($root . $routes[0])) {
$file = $root . $routes[0] . "/index.php";
$class = "Index";
} else {
$method = $routes[0];
$file = $root . "index.php";
$class = "Index";
}
$_W['action'] = $routes[0];
}
break;
case 2: {
$_W['action'] = $routes[0] . "." . $routes[1];
$file = $root . $routes[0] . "/" . $routes[1] . ".php";
//数组个数为2时, 例如 r=order.list ，这里会判断 order/list 是否为一个目录,如果是，则会访问 order/list /index.php
//如果order/list 不是一个目录，list是一个文件，那就访问order/list,php
if (is_file($file)) {
$class = ucfirst($routes[1]);
} elseif (is_dir($root . $routes[0] . "/" . $routes[1])) {
$file = $root . $routes[0] . "/" . $routes[1] . "/index.php";
$class = "Index";
} else {
//又或者order不是目录，是一个文件
$file = $root . $routes[0] . ".php";
if (is_file($file)) {
$method = $routes[1];
$class = ucfirst($routes[0]);
} elseif (is_dir($root . $routes[0])) {
$method = $routes[1];
$file = $root . $routes[0] . "/index.php";
$class = "Index";
} else {
$file = $root . "index.php";
$class = "Index";
}
}
$_W['action'] = $routes[0] . "." . $routes[1];
break;
}
case 3: {
//和上面的 数组个数为2时 处理情况一样，不在赘述
$_W['action'] = $routes[0] . "." . $routes[1] . "." . $routes[2];
$file = $root . $routes[0] . "/" . $routes[1] . "/" . $routes[2] . ".php";
if (is_file($file)) {
$class = ucfirst($routes[2]);
} elseif (is_dir($root . $routes[0] . "/" . $routes[1] . "/" . $routes[2])) {
$file = $root . $routes[0] . "/" . $routes[1] . "/" . $routes[2] . "/index.php";
$class = "Index";
} else {
$method = $routes[2];
$file = $root . $routes[0] . "/" . $routes[1] . ".php";
if (is_file($file)) {
$class = ucfirst($routes[1]);
} elseif (is_dir($root . $routes[0] . "/" . $routes[1])) {
$file = $root . $routes[0] . "/" . $routes[1] . "/index.php";
$class = "Index";
}
$_W['action'] = $routes[0] . "." . $routes[1];
}
break;
}
case 4: {
$_W['action'] = $routes[0] . "." . $routes[1] . "." . $routes[2];
$method = $routes[3];
$class = ucfirst($routes[2]);
$file = $root . $routes[0] . "/" . $routes[1] . "/" . $routes[2] . ".php";
break;
}
}
if (!is_file($file)) {
show_message("未找到控制器 {$r}");
}
$_W['routes'] = $r;
$_W['isplugin'] = $isplugin;
$_W['controller'] = $routes[0];
//读取网站整体配置，保存在cache
$global_set= m('cache')->getArray('globalset');
if(empty($global_set)){
$global_set = m('common')->setGlobalSet();
}
if(!is_array($global_set)){
$global_set = array();
}
empty($global_set['trade']['credittext']) && $global_set['trade']['credittext'] = "积分";
empty($global_set['trade']['moneytext']) && $global_set['trade']['moneytext'] = "余额";
$GLOBALS["_S"] = $_W['shopset'] = $global_set;
include $file;
//判断访问通过app端还是pc的，
if (isset($_GPC['r']) && strpos($_GPC['r'], 'pc') !== false) {
//Controller为pc端的控制器
$class = ucfirst($class) . "Controller";
} else {
//EweiShopV2Page为app端的控制器
$class = ucfirst($class) . "_EweiShopV2Page";
}
//执行已加载对应控制器的方法
$instance = new $class();
if (!method_exists($instance, $method)) {
show_message("控制器 {$_W['controller']} 方法 {$method} 未找到!");
}
$response = $instance->$method();
if (!empty($response)) {
echo $response;
}
die;
}
}
