如何在路由执行前后修改slim v3响应体？

Question

我无法在苗条的v3中得到反应体,它总是空白.我的代码是:

<?php

use \Psr\Http\Message\ServerRequestInterface as Request;
use \Psr\Http\Message\ResponseInterface as Response;
use \Slim\App as Slim;

require 'vendor/autoload.php';

$config['determineRouteBeforeAppMiddleware'] = true;

$app = new Slim(['settings' => $config]);

$mw = (function (Request $request, Response $response, callable $next) {
    $response = $response->withStatus(200)->write(' before ');
    $response = $next($request, $response);
    $body = $response->getBody()->getContents();
    $response = $response->withJson(array('data' => $body)); // output should be {"data":" Hello, User  seq1  seq2 "}
    return $response;
});

$mw1 = (function (Request $request, Response $response, callable $next) {
    $response = $next($request, $response);
    $response = $response->withStatus(200)->write(' seq1 ');
    return $response;
});

$mw2 = (function (Request $request, Response $response, callable $next) {
    $response = $next($request, $response);
    $response->withStatus(200)->write(' seq2 ');
    return $response;

});

$app->add($mw);

$app->get('/hello/{name}', function (Request $request, Response $response) {
    $name = $request->getAttribute('name');
    $response->getBody()->write(" Hello, $name ");
    return $response;
})->add($mw1)->add($mw2);

$app->run();

我想做的是以下内容:

• 我不想在每个路由的末尾添加withJson()来编码我的json并输出到客户端(浏览器).我希望中间件在(任何)路由执行结束后为我处理这个问题.
• 我想得到最后的主体并将其分配给数组,如$ data ['data'] = $ body,然后json对其进行编码并返回修改后的响应.

PS Slim v2比Slim v3容易得多

Answer 1

尝试改变getContents()为__toString()在中间件mw.应该进行的另一项更改是mw2:您必须返回创建的新响应.

查看完整代码:

<?php

use \Psr\Http\Message\ServerRequestInterface as Request;
use \Psr\Http\Message\ResponseInterface as Response;
use \Slim\App as Slim;

require 'vendor/autoload.php';

$config['determineRouteBeforeAppMiddleware'] = true;

$app = new Slim(['settings' => $config]);

$mw = (function (Request $request, Response $response, callable $next) {
    $response = $response->withStatus(200)->write(' before ');
    $response = $next($request, $response);
    $body = $response->getBody()->__toString();
    $response = $response->withJson(array('data' => $body)); // output should be {"data":" Hello, User  seq1  seq2 "}
    return $response;
});

$mw1 = (function (Request $request, Response $response, callable $next) {
    $response = $next($request, $response);
    $response = $response->withStatus(200)->write(' seq1 ');
    return $response;
});

$mw2 = (function (Request $request, Response $response, callable $next) {
    $response = $next($request, $response);
    $response = $response->withStatus(200)->write(' seq2 ');
    return $response;

});

$app->add($mw);

$app->get('/hello/{name}', function (Request $request, Response $response) {
    $name = $request->getAttribute('name');
    $response->getBody()->write(" Hello, $name ");
    return $response;
})->add($mw1)->add($mw2);

$app->run();

我希望它可以帮到你.

PS:我更喜欢Slim 3:D