JSON encoded exceptions in TYPO3 extbase controller with JsonView

Question

For my extbase-based TYPO3 CMS extension I created an ApiController with JsonView as view object. Returning values works like a charm, the correct header Content-type: application/json is set.

To return other responses like missing authorization messages or validation errors, I currently use:

$data = ["errors" => [
    "status" => 401,
    "message" => "Missing access token"
]];
$this->throwStatus($status, null, json_encode($data));

When I use $this->throwStatus() the header Content-type: text/html is set. Even if I manually set header("Content-type: application/json"); before using $this->throwStatus().

How can I create responses with the correct content type header?

Answer 1

Before you throw the status, try to set the headers in the response object:

$this->response->setHeader('Content-Type', 'application/json', true);
$this->response->sendHeaders();

If you are accessing your data through a dedicated pageType, you can set the header for this pageType in TypoScript:

myPageType.config.additionalHeaders {
   10 {
      header = Content-Type: application/json
      replace = 1
   }
}

I will add this to my post about the topic: https://usetypo3.com/json-view.html