php处理restful请求的路由类分享
php处理restful请求的路由类分享
发布时间:2016-12-29 来源:查字典编辑
摘要:复制代码代码如下:

复制代码 代码如下:

<?php

class Router {

// 路由表

private $routers = array(

array("name"=>"userlist", "pattern"=>"get /user", "action"=>"User#get"),

array("name"=>"userinfo", "pattern"=>"get /user/:s", "action"=>"User#getById"),

array("name"=>"useradd", "pattern"=>"post /user", "action"=>"User#add"),

array("name"=>"userupdate", "pattern"=>"update /user", "action"=>"User#update"),

array("name"=>"userdel", "pattern"=>"delete /user/:id", "action"=>"User#delete")

);

// 入口

public function dispatch() {

$url = $_SERVER["REQUEST_URI"];

$method = $_SERVER["REQUEST_METHOD"];

foreach ($this->routers as $router) {

$pattern = $router["pattern"];

$pats = explode(" ", $pattern);

if (strcasecmp($pats[0], $method) == 0) {

// 是否与当前路由匹配

$params = $this->checkUrl($method, strtolower($url), strtolower($pats[1]));

if ($params != null) {

array_shift($params);

$action = $router["action"];

// 寻找到第一个匹配的路由即执行,然后返回

return $this->invoke($action, $params);

}

}

}

echo "404 error";

// error 404

}

private function invoke($action, $params) {

$acts = explode("#", $action);

$className = $acts[0]."Action";

$methodName = $acts[1];

$actionDir = dirname(__FILE__).DIRECTORY_SEPARATOR."action";

// 载入action文件

$classFile = $actionDir.DIRECTORY_SEPARATOR.$className.".php";

if (! file_exists($classFile)) {

// 404 error

echo "404 error, no action found";

return;

} else {

require "$classFile";

// 使用反射执行方法

$rc = new ReflectionClass($className);

if (! $rc->hasMethod($methodName)) {

// 404 error

echo "404 error, no method found";

return;

} else {

$instance = $rc->newInstance();

$method = $rc->getMethod($methodName);

$method->invokeArgs($instance, $params);

}

}

}

// 正则匹配检查,并提取出参数

private function checkUrl($method, $str, $pattern) {

//echo "check $str with $pattern <br>";

$ma = array();

$pattern = ltrim(rtrim($pattern, "/"));

$pattern = "/".str_replace("/", "/", $pattern)."/?$/";

$pattern = str_replace(":s", "([^/]+)", $pattern);

//echo "pattern $pattern<br>";

//$str = "/".$str."$/";

if (preg_match($pattern, $str, $ma) > 0) {

return $ma;

}

return null;

}

}

?>

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