/**
* Middleware callback used to check MIME types are OK.
* It is not intended that you call this function yourself.
* @throws \InvalidArgumentException Exception thrown if callback invoked incorrectly.
*/
public function callbackCheckFormats()
{
// get the acceptable MIME type from route info
$args = func_get_args();
if (count($args) === 0 || !$args[0] instanceof \Slim\Route) {
throw new \InvalidArgumentException('This method should not be invoked outside of the Slim Framework');
}
$route = $args[0];
$id = $this->app->request()->getMethod() . $route->getPattern();
$acceptableMime = $this->routeInfo[$id]['mimeTypes'];
// perform MIME-type matching on the requested and available formats
// note that if there are no q-values, the *LAST* type "wins"
$conneg = new \ptlis\ConNeg\Negotiation();
$this->mimeBest = $conneg->mimeBest($_SERVER['HTTP_ACCEPT'], $acceptableMime);
if (!$this->mimeBest) {
// TODO: need to verify that this is the expected return if there are no matches
$this->outputError(406, 'Not Acceptable', '</p><p>This service cannot return information in the format(s) you requested.', 'Sorry, we cannot serve you data in your requested format');
}
// store alternative MIME types
foreach ($conneg->mimeAll('*/*', $acceptableMime) as $type) {
$type = $type->getClientPreference();
// TODO: this stores objects of type ptlis\ConNeg\Preference\Preference
// but we want to have a list of content types
if ($type != $this->mimeBest) {
$this->mimeAlternatives[] = $type;
}
}
// return best match
return $this->mimeBest;
}
/**
* @dataProvider mimeProvider
*
* @param string $clientField
* @param string $serverField
* @param string $best
* @param MatchedPreferenceInterface[] $all
*/
public function testBest($clientField, $serverField, $best, array $all)
{
$negotiate = new Negotiation();
$resultType = $negotiate->mimeBest($clientField, $serverField);
$this->assertEquals($best, $resultType);
}