/**
* Negotiates the response format.
* @param Request $request
* @param Response $response
* @throws ContentNegotiatorFilterException if none of the requested content types is accepted.
*/
protected function negotiateContentType($request, $response)
{
if (!empty($this->formatParam) && ($format = Request::get($this->formatParam)) !== null) {
if (in_array($format, $this->formats)) {
$response->format = $format;
$response->acceptMimeType = null;
$response->acceptParams = [];
return;
} else {
throw new ContentNegotiatorFilterException('The requested response format is not supported: ' . $format);
}
}
$types = $request->getAcceptableContentTypes();
if (empty($types)) {
$types['*/*'] = [];
}
foreach ($types as $type => $params) {
if (isset($this->formats[$type])) {
$response->format = $this->formats[$type];
$response->acceptMimeType = $type;
$response->acceptParams = $params;
return;
}
}
if (isset($types['*/*'])) {
// return the first format
foreach ($this->formats as $type => $format) {
$response->format = $this->formats[$type];
$response->acceptMimeType = $type;
$response->acceptParams = [];
return;
}
}
throw new ContentNegotiatorFilterException('None of your requested content types is supported.');
}
