/**
* Gets the response format for the requested resource.
*
* @param RequestDescription $request The request submitted by client and it's execution result.
* @param UriProcessor $uriProcessor The reference to the UriProcessor.
* @param IService $service Reference to the service implementation instance
*
* @return string the response content-type, a null value means the requested resource
* is named stream and IDSSP2::getStreamContentType returned null
*
* @throws ODataException, HttpHeaderFailure
*/
public static function getResponseContentType(RequestDescription $request, UriProcessor $uriProcessor, IService $service)
{
// The Accept request-header field specifies media types which are acceptable for the response
$host = $service->getHost();
$requestAcceptText = $host->getRequestAccept();
$requestVersion = $request->getResponseVersion();
//if the $format header is present it overrides the accepts header
$format = $host->getQueryStringItem(ODataConstants::HTTPQUERY_STRING_FORMAT);
if (!is_null($format)) {
//There's a strange edge case..if application/json is supplied and it's V3
if ($format == MimeTypes::MIME_APPLICATION_JSON && $requestVersion == Version::v3()) {
//then it's actual minimalmetadata
//TODO: should this be done with the header text too?
$format = MimeTypes::MIME_APPLICATION_JSON_MINIMAL_META;
}
$requestAcceptText = ServiceHost::translateFormatToMime($requestVersion, $format);
}
//The response format can be dictated by the target resource kind. IE a $value will be different then expected
//getTargetKind doesn't deal with link resources directly and this can change things
$targetKind = $request->isLinkUri() ? TargetKind::LINK() : $request->getTargetKind();
switch ($targetKind) {
case TargetKind::METADATA():
return HttpProcessUtility::selectMimeType($requestAcceptText, array(MimeTypes::MIME_APPLICATION_XML));
case TargetKind::SERVICE_DIRECTORY():
return HttpProcessUtility::selectMimeType($requestAcceptText, array(MimeTypes::MIME_APPLICATION_XML, MimeTypes::MIME_APPLICATION_ATOMSERVICE, MimeTypes::MIME_APPLICATION_JSON, MimeTypes::MIME_APPLICATION_JSON_FULL_META, MimeTypes::MIME_APPLICATION_JSON_NO_META, MimeTypes::MIME_APPLICATION_JSON_MINIMAL_META, MimeTypes::MIME_APPLICATION_JSON_VERBOSE));
case TargetKind::PRIMITIVE_VALUE():
$supportedResponseMimeTypes = array(MimeTypes::MIME_TEXTPLAIN);
if ($request->getIdentifier() != '$count') {
$projectedProperty = $request->getProjectedProperty();
self::assert(!is_null($projectedProperty), '!is_null($projectedProperty)');
$type = $projectedProperty->getInstanceType();
self::assert(!is_null($type) && $type instanceof IType, '!is_null($type) && $type instanceof IType');
if ($type instanceof Binary) {
$supportedResponseMimeTypes = array(MimeTypes::MIME_APPLICATION_OCTETSTREAM);
}
}
return HttpProcessUtility::selectMimeType($requestAcceptText, $supportedResponseMimeTypes);
case TargetKind::PRIMITIVE():
case TargetKind::COMPLEX_OBJECT():
case TargetKind::BAG():
case TargetKind::LINK():
return HttpProcessUtility::selectMimeType($requestAcceptText, array(MimeTypes::MIME_APPLICATION_XML, MimeTypes::MIME_TEXTXML, MimeTypes::MIME_APPLICATION_JSON, MimeTypes::MIME_APPLICATION_JSON_FULL_META, MimeTypes::MIME_APPLICATION_JSON_NO_META, MimeTypes::MIME_APPLICATION_JSON_MINIMAL_META, MimeTypes::MIME_APPLICATION_JSON_VERBOSE));
case TargetKind::RESOURCE():
return HttpProcessUtility::selectMimeType($requestAcceptText, array(MimeTypes::MIME_APPLICATION_ATOM, MimeTypes::MIME_APPLICATION_JSON, MimeTypes::MIME_APPLICATION_JSON_FULL_META, MimeTypes::MIME_APPLICATION_JSON_NO_META, MimeTypes::MIME_APPLICATION_JSON_MINIMAL_META, MimeTypes::MIME_APPLICATION_JSON_VERBOSE));
case TargetKind::MEDIA_RESOURCE():
if (!$request->isNamedStream() && !$request->getTargetResourceType()->isMediaLinkEntry()) {
throw ODataException::createBadRequestError(Messages::badRequestInvalidUriForMediaResource($host->getAbsoluteRequestUri()->getUrlAsString()));
}
$uriProcessor->execute();
$request->setExecuted();
// DSSW::getStreamContentType can throw error in 2 cases
// 1. If the required stream implementation not found
// 2. If IDSSP::getStreamContentType returns NULL for MLE
$responseContentType = $service->getStreamProviderWrapper()->getStreamContentType($request->getTargetResult(), $request->getResourceStreamInfo());
// Note StreamWrapper::getStreamContentType can return NULL if the requested named stream has not
// yet been uploaded. But for an MLE if IDSSP::getStreamContentType returns NULL then StreamWrapper will throw error
if (!is_null($responseContentType)) {
$responseContentType = HttpProcessUtility::selectMimeType($requestAcceptText, array($responseContentType));
}
return $responseContentType;
}
//If we got here, we just don't know what it is...
throw new ODataException(Messages::unsupportedMediaType(), 415);
}
