Slim 框架学习，第二十天 _Router（十一）

导读：今天继续学习Slim/Route.php 类剩余的功能。前面的章节，已经对每个方法都说过了。今天只剩一个__invoke 方法了

__invoke

/**
     * 根据当前请求和响应对象 调用 能调用的路由
     * Dispatch route callable against current Request and Response objects
     *
     * 该方法调用可调用的路由对象。
     * 如果为路由注册了中间件，则每个可调用的中间件，将被按顺序调用
     * This method invokes the route object's callable. If middleware is * registered for the route, each callable middleware is invoked in * the order specified. * * @param ServerRequestInterface $request The current Request object * @param ResponseInterface $response The current Response object * @return \Psr\Http\Message\ResponseInterface * @throws \Exception if the route callable throws an exception */ public function __invoke(ServerRequestInterface $request, ResponseInterface $response) { //这里得到的是容器的闭包对象 /** * object(Closure)#19 (2) { ["this"]=> object(Slim\Container)#3 (7) { ["defaultSettings":"Slim\Container":private]=> array(7) { ["httpVersion"]=> string(3) "1.1" ["responseChunkSize"]=> int(4096) ["outputBuffering"]=> string(6) "append" ["determineRouteBeforeAppMiddleware"]=> bool(false) ["displayErrorDetails"]=> bool(false) ["addContentLengthHeader"]=> bool(true) ["routerCacheFile"]=> bool(false) } **/ $this->callable = $this->resolveCallable($this->callable); /** @var InvocationStrategyInterface $handler */ /** * ["foundHandler"]=> object(Closure)#12 (1) { ["this"]=> object(Slim\DefaultServicesProvider)#7 (0) { } } */ $handler = isset($this->container) ? $this->container->get('foundHandler') : new RequestResponse(); $newResponse = $handler($this->callable, $request, $response, $this->arguments); if ($newResponse instanceof ResponseInterface) { // if route callback returns a ResponseInterface, then use it $response = $newResponse; } elseif (is_string($newResponse)) { // if route callback returns a string, then append it to the response if ($response->getBody()->isWritable()) { $response->getBody()->write($newResponse); } } return $response; }

下面看一下，最后返回的对象

object(Slim\Http\Response)#26 (5) {
  ["status":protected]=>
  int(200)
  ["reasonPhrase":protected]=>
  string(0) ""
  ["protocolVersion":protected]=>
  string(3) "1.1"
  ["headers":protected]=>
  object(Slim\Http\Headers)#27 (1) {
    ["data":protected]=>
    array(1) {
      ["content-type"]=>
      array(2) {
        ["value"]=>
        array(1) {
          [0]=>
          string(24) "text/html; charset=UTF-8"
        }
        ["originalKey"]=>
        string(12) "Content-Type"
      }
    }
  }
  ["body":protected]=>
  object(Slim\Http\Body)#25 (7) {
    ["stream":protected]=>
    resource(37) of type (stream)
    ["meta":protected]=>
    array(6) {
      ["wrapper_type"]=>
      string(3) "PHP"
      ["stream_type"]=>
      string(4) "TEMP"
      ["mode"]=>
      string(3) "w+b"
      ["unread_bytes"]=>
      int(0)
      ["seekable"]=>
      bool(true)
      ["uri"]=>
      string(10) "php://temp"
    }
    ["readable":protected]=>
    NULL
    ["writable":protected]=>
    bool(true)
    ["seekable":protected]=>
    NULL
    ["size":protected]=>
    NULL
    ["isPipe":protected]=>
    NULL
  }
}

最终返回的是 Slim\Http\Response 对象

至此，该类就学完了