/**
* 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);
}
/**
* Output entity data.
*
* @param string $format The name (mime type of file extension) of the format to use
* @param EntityRevision $entityRevision The entity
* @param RedirectRevision|null $followedRedirect The redirect that led to the entity, or null
* @param EntityId[] $incomingRedirects Incoming redirects to include in the output
* @param string|null $flavor The type of the output provided by serializer
*
* @return array tuple of ( $data, $contentType )
* @throws MWException
*/
public function getSerializedData($format, EntityRevision $entityRevision, RedirectRevision $followedRedirect = null, array $incomingRedirects = array(), $flavor = null)
{
$formatName = $this->entityDataFormatProvider->getFormatName($format);
if ($formatName === null) {
throw new MWException("Unsupported format: {$format}");
}
$serializer = $this->createApiSerializer($formatName);
if ($serializer !== null) {
$data = $this->getApiSerialization($entityRevision, $serializer);
$contentType = $serializer->getIsHtml() ? 'text/html' : $serializer->getMimeType();
} else {
$rdfBuilder = $this->createRdfBuilder($formatName, $flavor);
if ($rdfBuilder === null) {
throw new MWException("Could not create serializer for {$formatName}");
}
$data = $this->rdfSerialize($entityRevision, $followedRedirect, $incomingRedirects, $rdfBuilder, $flavor);
$mimeTypes = $this->rdfWriterFactory->getMimeTypes($formatName);
$contentType = reset($mimeTypes);
}
return array($data, $contentType);
}
