/**
* Applies HTTP content negotiation.
* If the negotiation is successfull, this method will set the appropriate redirect
* in the OutputPage object and return. Otherwise, an HttpError is thrown.
*
* @param WebRequest $request
* @param OutputPage $output
* @param EntityId $id The ID of the entity to show
* @param int $revision The desired revision
*
* @throws HttpError
*/
public function httpContentNegotiation(WebRequest $request, OutputPage $output, EntityId $id, $revision = 0)
{
$headers = $request->getAllHeaders();
if (isset($headers['ACCEPT'])) {
$parser = new HttpAcceptParser();
$accept = $parser->parseWeights($headers['ACCEPT']);
} else {
// anything goes
$accept = array('*' => 0.1);
$defaultFormat = $this->entityDataFormatProvider->getFormatName($this->defaultFormat);
$defaultMime = $this->entityDataFormatProvider->getMimeType($defaultFormat);
// prefer the default
if ($defaultMime != null) {
$accept[$defaultMime] = 1;
}
}
$mimeTypes = $this->entityDataFormatProvider->getSupportedMimeTypes();
$mimeTypes[] = 'text/html';
// HTML is handled by the normal page URL
$negotiator = new HttpAcceptNegotiator($mimeTypes);
$format = $negotiator->getBestSupportedKey($accept, null);
if ($format === null) {
$mimeTypes = implode(', ', $this->entityDataFormatProvider->getSupportedMimeTypes());
throw new HttpError(406, wfMessage('wikibase-entitydata-not-acceptable')->params($mimeTypes));
}
$format = $this->getCanonicalFormat($format);
$url = $this->uriManager->getDocUrl($id, $format, $revision);
$output->redirect($url, 303);
}
/**
* @dataProvider provideGetBestSupportedKey
*/
public function testGetBestSupportedKey($supported, $accepted, $default, $expected)
{
$negotiator = new HttpAcceptNegotiator($supported);
$actual = $negotiator->getBestSupportedKey($accepted, $default);
$this->assertEquals($expected, $actual);
}