2019-06-10 11:40
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Symfony / Http-foundation组件如何处理Http请求和响应

I've been assigned to a project which needs include the Symfony components in order to re-organize its business logic. However, I got confused by looking at the Symfony HTTP-foundation document. Hope someone here could help me explain a bit how this component deals with users Http requests and responses.

Basically, what I did in the project was:

  1. having a PHP page creates the Request object with requests' URL and method

  2. Using an ApiRouter to direct the code to the desired controller

  3. Within the controller, it will send the HTTP request to the server and convert responses as a Symfony Response object base on the Request URL.


class GetLocation
public function __construct($q)
    $request = Request::create('location?v=full&q=' . 
    urlencode($q), 'GET'); //simulates a request using the url
    $rest_api = new RestApi();  //passing the request to api router


    //location router
       $location_route = new Route(
            ['controller' => 'LocationController']
       $api_routes->add('location_route', $location_route);

    //Init RequestContext object
    $context = new RequestContext();
    //generate the context from user passed $request

    // Init UrlMatcher object matches the url path with router
    // Find the current route and returns an array of attributes
    $matcher = new UrlMatcher($api_routes, $context);
    try {
        $parameters = $matcher->match($request->getPathInfo());
        extract($parameters, EXTR_SKIP);

        $response = new Response(ob_get_clean());
    } catch (ResourceNotFoundException $exception) {
        $response = new Response('Not Found', 404);
    } catch (Exception $exception) {
        $response = new Response('An error occurred', 500);

What I hope to know is whether my understanding is correct regards to the logic or not? And what does the method Request:createFromGlobal means, what are the differences between this and Request:create(URL)

Please do let me know if my question needs to be more specific.

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