Allow set return content type

[romkatsu]

Q	A
Is bugfix?	❌
New feature?	✔️
Breaks BC?	❌
Fixed issues	Allow set return content type

A single render is needed when the output should be the same regardless of the request.

[samdark]

1. What's the use-case?
2. Can it be done as ->withoutRenderers()->withRenderer()?

[romkatsu]

1. What's the use-case?

2. Can it be done as ->withoutRenderers()->withRenderer()?

1. rest api - regardless of the request you need to return errors in json format
2. No. These methods only add-remove the Renderers. The desired render is taken from the accept header

$contentType = $this->getContentType($request);
$renderer = $this->getRenderer(strtolower($contentType));

[samdark]

👍

[roxblnfk]

Suggested change

	foreach (HeaderHelper::getSortedAcceptTypes($request->getHeader('accept')) as $header) {
	foreach (HeaderHelper::getSortedAcceptTypes($request->getHeader(Header::ACCEPT)) as $header) {