Hello,
I try to convert my development project from Slim v2 to Slim v3 and I have a behavior which i can’t explain the reason why.
It’s written in the documentation (http://www.slimframework.com/docs/objects/response.html) that “The Content-Type of the Response is automatically set to application/json;charset=utf-8.” when we use withJson.
But I have a problem because when i get the response “Content-type” is “text/html; charset=UTF-8”
My code is very simple.
The route :
$app->get("/{memberRole:public|member|moderator|admin|superuser}/members[/{id:[0-9]+}]", '\LPDP\Controllers\membersController:getMembers' )->setName("getMembers");
The method
public function get(Request $req, Response $res, $args, $table)
{
/**
* get response error code
*/
$result = $this->conf->get('errors.REST_RESPONSE_OK');
$sqlStatement = "SELECT * FROM $table";
$this->db->exec("SET NAMES utf8");
$sdata = $this->db->prepare($sqlStatement);
$sdata->execute();
$data = $sdata->fetchAll(PDO::FETCH_CLASS);
/**
* add debug information in response
*/
$data["debug"] = "get$table";
/**
* return response
*/
return $res->withJson($data, $result["httpStatus"]);
}
The response property :
HTTP/1.1 200 OK
Server: xxxxxxxx
Date: Sat, 07 May 2016 14:04:35 GMT
Content-Type: text/html; charset=UTF-8
Transfer-Encoding: chunked
Connection: keep-alive
Vary: Accept-Encoding
X-Powered-By: PHP/5.5.35
X-Cache: HIT from Backend
Have you any idea why I don’t get the correct Content-Type ?
Thanks for your help.
Hey,
You sure it’s copy of your code - because I just tested your code and it returns normal content-type header.
Hi,
Thanks for your answer. I have two middlewares
/**
* define JWT middleware
*/
$app->add(new Slim\Middleware\JwtAuthentication([
"secure" => false,
"secret" => "key",
"rules" => [
new \Slim\Middleware\JwtAuthentication\RequestPathRule([
"path" => "/",
"passthrough" => ["/public"]
]),
new \Slim\Middleware\JwtAuthentication\RequestMethodRule([
"passthrough" => ["OPTIONS"]
])
],
"callback" => function (Request $request, Response $response, $arguments) use ($container) {
$container["jwt"] = $arguments["decoded"];
},
"error" => function (Request $request, Response $response, $arguments) use ($container) {
//TODO: complete response
$conf = $container->get('apiConfig');
$data = $conf->get('errors.REST_RESPONSE_UNAUTHORIZED');
$data["debug"] = "error-jwt";
return $response->withJson($data, $data["httpStatus"]);
}
]));
/**
* add Authentication Session middleware
*/
$app->add(new \LPDP\Middleware\AuthenticateSession());
The AuthenticateSession class is empty (just the invoke function for now without any action).
class AuthenticateSession
{
public function __invoke(ServerRequestInterface $req, ResponseInterface $res, $next)
{
$res = $next($req, $res);
return $res;
}
}
It’s strange… I use the version 3.3.0 (with composer). You are in the same version ?
Thanks you
You copied the right code? Because the mapping refers to a method named getMembers and the method you posted is named get.
Hello
I’ve a class membersController that inherit from a class controller. That’s the reason why you don’t retrieve the good name for the method 
class membersController extends controller
{
private $table = "members";
public function getMembers(Request $req, Response $res, $args)
{
parent::get($req, $res, $args, $this->table);
}
I just try to modify my code of membersController :
public function getMembers(Request $req, Response $res, $args)
{
return $res->withJson(parent::get($req, $res, $args, $this->table));
}
It’s same result 
:
HTTP/1.1 200 OK
Server: xxx
Date: Sun, 08 May 2016 13:25:44 GMT
Content-Type: text/html; charset=UTF-8
Transfer-Encoding: chunked
Connection: keep-alive
Vary: Accept-Encoding
X-Powered-By: PHP/5.5.35
X-Cache: HIT from Backend
You don’t return the response here, you just call the parent. You should put return before parent.
hi,
I tried this but same issue. I will try to rewrite my code step by step to identify the root cause and I will give you the results.
I am very busy on other things this week . I will do this weekend
thank you
Hello,
I think have the same problem; or my problem can be described exactly with this discussion title 
Here’s my minimal working example:
<?php
require ‘vendor/autoload.php’;
// Create and configure Slim app
$app = new \Slim\App;
$app->get(‘/’, function($request, $response, $args) {
$new_response = $response->withJson([‘test’, ‘test2’]);
$content_type = $new_response->getHeader(‘Content-Type’);
echo “\n” . $content_type[0];
return $new_response;
});
$app->run();
$content_type = $app->getContainer()->get(‘response’)->getHeader(‘Content-Type’);
echo “\n” . $content_type[0];
The output after execution is this:
["test","test2"]
application/json;charset=utf-8
text/html; charset=UTF-8
I’ve even tried adding a $app->add( function( ServerRequestInterface $request, ResponseInterface $response, callable $next ) { ... } )); and check the header values before and after the $next($request, $response); call.
The headers are only correct when accessing inside the specific route which was executed. Outside of it, the Content-Type is always the default text/html.
Edit: I’ve installed the framework with the suggested composer require slim/slim "^3.0" command. As of today morning, no updates are available, so I presume I’m at the current version: 3.4-0
Edit 2: One more thing worth mentioning: the browser correctly receives the Content-Type JSON header; and replacing the echos with IFs have no impact, the Content-Type is still text/html. (tested it in case somehow the echoing changes the Content-Type back to text/html)
@zeroxx1986 You dont have a problem. The behaviour is exacly as expected. Your response in the application has the right content type. Outside the application you get a new response object from the container, which has the default content type.
Ah, okay, thank you for clarifying.
I don’t understand why… But i try once again your suggestion
public function getMembers(Request $req, Response $res, $args)
{
return parent::get($req, $res, $args, $this->table);
}
It’s works now. May be, i make a mistake during the update on the server. It’s works fine now. May be, it’s because i did update Slim to the 3.4.1 version yesterday. I don’t know
Thanks