通过外部类修改Slim 3中的响应对象

我的slim应用程序有一个问题,我想发送json响应,但需要自定义标题。我的代码如下:

指数php

require 'vendor/autoload.php';
require 'app/config.php';
require 'app/libs/api.cs.php';

$app = new Slim\App(    
    [
        "settings" => $config,
        "apics" => function() { return new APIHelper(); } //This is a class that contain a "helper" for api responses
    ]
  );

require 'app/dependences.php';
require 'app/middleware.php';
require 'app/loader.php';
require 'app/routes.php';

// Run app
$app->run();

app/libs/api。反恐精英。php(“助手”)

<?php
class APIHelper
{
    public function sendResponse($response, $status='success' ,$code = 200, $message = "", $data = null)
    {
      $arrResponse = array();  
      $arrResponse['status'] = $status;
      $arrResponse['code'] = $code;
      $arrResponse['message'] = $message;  
      $arrResponse['data'] = $data;
       return $response
        ->withHeader('Access-Control-Allow-Origin', '*')
        ->withHeader('Access-Control-Allow-Headers', 'X-Requested-With, Content-Type, Accept, Origin, Authorization, AeroTkn')
        ->withHeader('Access-Control-Allow-Methods', 'GET, POST, PUT, DELETE, OPTIONS')
        ->withHeader('Content-Type','application/json')
        ->withHeader('X-Powered-By','My API Server')
        ->withJson($arrResponse,$code);
    }
}

我的路线文件(app/routes.php)

$app->group('/foo', function () {
  $this->get('', function ($req, $res, $args) {
    return $this->apics->sendResponse($res, 'success' ,200, "Foo API Index By Get", null);
});

  $this->post('', function ($req, $res, $args) {
    try{
        $oBody = $req->getParsedBody();
        return $this->apics->sendResponse($res, 'success' ,200, "Foo API POST Response", $oBody);        
      }
      catch(\Exception $ex){
        return $this->apics->sendResponse($res, 'error' ,500, "Process Error", array('error' => $ex->getMessage()));
    }   
  });
});

标题:

connection →Keep-Alive
content-type →text/html
date →Wed, 30 Aug 2017 02:22:56 GMT
keep-alive →timeout=2, max=500
server →Apache
transfer-encoding →chunked

{"status":"success","code":200,"message":"Foo API POST Response","data":{"one":"1", "two":"2"}}

我试图把这个类作为一个中间件,但我对这些主题有些困惑。

你能帮我告诉我这些方法是好是坏吗。