/**
* Write in specific format
*
* @param DataService &$dataService Dataservice
* @param RequestDescription &$requestDescription Request description object
* @param Object &$odataModelInstance OData model instance
* @param String $responseContentType Content type of the response
* @param String $responseFormat Output format
*
* @return nothing
*/
public static function write(DataService &$dataService, RequestDescription &$requestDescription, &$odataModelInstance, $responseContentType, $responseFormat)
{
$responseBody = null;
$dataServiceVersion = $requestDescription->getResponseDataServiceVersion();
if ($responseFormat == ResponseFormat::METADATA_DOCUMENT) {
// /$metadata
$writer = new MetadataWriter($dataService->getMetadataQueryProviderWrapper());
$responseBody = $writer->writeMetadata();
$dataServiceVersion = $writer->getDataServiceVersion();
} else {
if ($responseFormat == ResponseFormat::TEXT) {
// /Customer('ALFKI')/CompanyName/$value
// /Customers/$count
$responseBody = utf8_encode($requestDescription->getTargetResult());
} else {
if ($responseFormat == ResponseFormat::BINARY) {
// Binary property or media resource
$targetKind = $requestDescription->getTargetKind();
if ($targetKind == RequestTargetKind::MEDIA_RESOURCE) {
$eTag = $dataService->getStreamProvider()->getStreamETag($requestDescription->getTargetResult(), $requestDescription->getResourceStreamInfo());
$dataService->getHost()->setResponseETag($eTag);
$responseBody = $dataService->getStreamProvider()->getReadStream($requestDescription->getTargetResult(), $requestDescription->getResourceStreamInfo());
} else {
$responseBody = $requestDescription->getTargetResult();
}
if (is_null($responseContentType)) {
$responseContentType = ODataConstants::MIME_APPLICATION_OCTETSTREAM;
}
} else {
$writer = null;
$absoluteServiceUri = $dataService->getHost()->getAbsoluteServiceUri()->getUrlAsString();
if ($responseFormat == ResponseFormat::ATOM || $responseFormat == ResponseFormat::PLAIN_XML) {
if (is_null($odataModelInstance)) {
$writer = new \ODataProducer\Writers\ServiceDocument\Atom\ServiceDocumentWriter($dataService->getMetadataQueryProviderWrapper(), $absoluteServiceUri);
} else {
$isPostV1 = $requestDescription->getResponseDataServiceVersion()->compare(new Version(1, 0)) == 1;
$writer = new ODataWriter($absoluteServiceUri, $isPostV1, 'atom');
}
} else {
if ($responseFormat == ResponseFormat::JSON) {
if (is_null($odataModelInstance)) {
$writer = new \ODataProducer\Writers\ServiceDocument\Json\ServiceDocumentWriter($dataService->getMetadataQueryProviderWrapper(), $absoluteServiceUri);
} else {
$isPostV1 = $requestDescription->getResponseDataServiceVersion()->compare(new Version(1, 0)) == 1;
$writer = new ODataWriter($absoluteServiceUri, $isPostV1, 'json');
}
}
}
$responseBody = $writer->writeRequest($odataModelInstance);
}
}
}
$dataService->getHost()->setResponseStatusCode(HttpStatus::CODE_OK);
$dataService->getHost()->setResponseContentType($responseContentType);
$dataService->getHost()->setResponseVersion($dataServiceVersion->toString() . ';');
$dataService->getHost()->setResponseCacheControl(ODataConstants::HTTPRESPONSE_HEADER_CACHECONTROL_NOCACHE);
$dataService->getHost()->getWebOperationContext()->outgoingResponse()->setStream($responseBody);
}
/**
* Process the given request Uri and creates an instance of
* RequestDescription from the processed uri.
*
* @param Url &$absoluteRequestUri The absolute request uri.
* @param DataService &$dataService Reference to the data service
* instance.
*
* @return RequestDescription
*
* @throws ODataException If any exception occurs while processing the segments
* or incase of any version incompatibility.
*/
public static function process(Url &$absoluteRequestUri, DataService &$dataService)
{
$absoluteRequestUri = $dataService->getHost()->getAbsoluteRequestUri();
$absoluteServiceUri = $dataService->getHost()->getAbsoluteServiceUri();
$requestUriSegments = array_slice($absoluteRequestUri->getSegments(), $absoluteServiceUri->getSegmentCount());
$segmentDescriptors = null;
try {
$segmentDescriptors = SegmentParser::parseRequestUriSegements($requestUriSegments, $dataService->getMetadataQueryProviderWrapper(), true);
} catch (ODataException $odataException) {
throw $odataException;
}
$requestDescription = new RequestDescription($segmentDescriptors, $absoluteRequestUri);
$requestTargetKind = $requestDescription->getTargetKind();
if ($requestTargetKind != RequestTargetKind::METADATA && $requestTargetKind != RequestTargetKind::BATCH && $requestTargetKind != RequestTargetKind::SERVICE_DIRECTORY) {
if ($requestTargetKind != RequestTargetKind::PRIMITIVE_VALUE && $requestTargetKind != RequestTargetKind::MEDIA_RESOURCE) {
$requestDescription->setContainerName($requestDescription->getIdentifier());
} else {
// http://odata/NW.svc/Orders/$count
// http://odata/NW.svc/Orders(123)/Customer/CustomerID/$value
// http://odata/NW.svc/Employees(1)/$value
// http://odata/NW.svc/Employees(1)/ThumbNail_48X48/$value
$requestDescription->setContainerName($segmentDescriptors[count($segmentDescriptors) - 2]->getIdentifier());
}
if ($requestDescription->getIdentifier() === ODataConstants::URI_COUNT_SEGMENT) {
if (!$dataService->getServiceConfiguration()->getAcceptCountRequests()) {
ODataException::createBadRequestError(Messages::dataServiceConfigurationCountNotAccepted());
}
$requestDescription->setRequestCountOption(RequestCountOption::VALUE_ONLY);
// use of $count requires request DataServiceVersion
// and MaxDataServiceVersion
// greater than or equal to 2.0
$requestDescription->raiseResponseVersion(2, 0, $dataService);
$requestDescription->raiseMinimumVersionRequirement(2, 0, $dataService);
} else {
if ($requestDescription->isNamedStream()) {
$requestDescription->raiseMinimumVersionRequirement(3, 0, $dataService);
} else {
if ($requestDescription->getTargetKind() == RequestTargetKind::RESOURCE) {
if (!$requestDescription->isLinkUri()) {
$resourceSetWrapper = $requestDescription->getTargetResourceSetWrapper();
//assert($resourceSetWrapper != null)
$hasNamedStream = $resourceSetWrapper->hasNamedStreams($dataService->getMetadataQueryProviderWrapper());
$hasBagProperty = $resourceSetWrapper->hasBagProperty($dataService->getMetadataQueryProviderWrapper());
if ($hasNamedStream || $hasBagProperty) {
$requestDescription->raiseResponseVersion(3, 0, $dataService);
}
}
} else {
if ($requestDescription->getTargetKind() == RequestTargetKind::BAG) {
$requestDescription->raiseResponseVersion(3, 0, $dataService);
}
}
}
}
}
return $requestDescription;
}
/**
* Checks whether client request contains any odata query options.
*
* @return void
*
* @throws ODataException Throws bad request error if client request
* includes any odata query option.
*/
private function _checkForEmptyQueryArguments()
{
$dataServiceHost = $this->_dataService->getHost();
if (!is_null($dataServiceHost->getQueryStringItem(ODataConstants::HTTPQUERY_STRING_FILTER)) || !is_null($dataServiceHost->getQueryStringItem(ODataConstants::HTTPQUERY_STRING_EXPAND)) || !is_null($dataServiceHost->getQueryStringItem(ODataConstants::HTTPQUERY_STRING_INLINECOUNT)) || !is_null($dataServiceHost->getQueryStringItem(ODataConstants::HTTPQUERY_STRING_ORDERBY)) || !is_null($dataServiceHost->getQueryStringItem(ODataConstants::HTTPQUERY_STRING_SELECT)) || !is_null($dataServiceHost->getQueryStringItem(ODataConstants::HTTPQUERY_STRING_SKIP)) || !is_null($dataServiceHost->getQueryStringItem(ODataConstants::HTTPQUERY_STRING_SKIPTOKEN)) || !is_null($dataServiceHost->getQueryStringItem(ODataConstants::HTTPQUERY_STRING_TOP))) {
ODataException::createBadRequestError(Messages::queryProcessorNoQueryOptionsApplicable());
}
}
/**
* Builds the string corresponding to query parameters for top level results
* (result set identified by the resource path) to be put in next page link.
*
* @return string/NULL string representing the query parameters in the URI
* query parameter format, NULL if there
* is no query parameters
* required for the next link of top level result set.
*/
protected function getNextPageLinkQueryParametersForRootResourceSet()
{
$queryParameterString = null;
foreach (array(ODataConstants::HTTPQUERY_STRING_FILTER, ODataConstants::HTTPQUERY_STRING_EXPAND, ODataConstants::HTTPQUERY_STRING_ORDERBY, ODataConstants::HTTPQUERY_STRING_INLINECOUNT, ODataConstants::HTTPQUERY_STRING_SELECT) as $queryOption) {
$value = $this->dataService->getHost()->getQueryStringItem($queryOption);
if (!is_null($value)) {
if (!is_null($queryParameterString)) {
$queryParameterString = $queryParameterString . '&';
}
$queryParameterString .= $queryOption . '=' . $value;
}
}
$topCountValue = $this->requestDescription->getTopOptionCount();
if (!is_null($topCountValue)) {
$remainingCount = $topCountValue - $this->requestDescription->getTopCount();
if (!is_null($queryParameterString)) {
$queryParameterString .= '&';
}
$queryParameterString .= ODataConstants::HTTPQUERY_STRING_TOP . '=' . $remainingCount;
}
if (!is_null($queryParameterString)) {
$queryParameterString .= '&';
}
return $queryParameterString;
}
/**
* Common function to handle exceptions in the data service.
*
* @param Exception $exception exception occured
* @param DataService &$dataService dataservice
*
* @return nothing
*/
public static function handleException($exception, DataService &$dataService)
{
$acceptTypesText = $dataService->getHost()->getRequestAccept();
$responseContentType = null;
try {
$responseContentType = HttpProcessUtility::selectMimeType($acceptTypesText, array(ODataConstants::MIME_APPLICATION_XML, ODataConstants::MIME_APPLICATION_JSON));
} catch (HttpHeaderFailure $exception) {
$exception = new ODataException($exception->getMessage(), $exception->getStatusCode());
} catch (\Exception $exception) {
// Never come here
}
if (is_null($responseContentType)) {
$responseContentType = ODataConstants::MIME_APPLICATION_XML;
}
if (!$exception instanceof ODataException) {
$exception = new ODataException($exception->getMessage(), HttpStatus::CODE_INTERNAL_SERVER_ERROR);
}
$dataService->getHost()->setResponseVersion(ODataConstants::DATASERVICEVERSION_1_DOT_0 . ';');
// At this point all kind of exceptions will be converted
//to 'ODataException'
if ($exception->getStatusCode() == HttpStatus::CODE_NOT_MODIFIED) {
$dataService->getHost()->setResponseStatusCode(HttpStatus::CODE_NOT_MODIFIED);
} else {
$dataService->getHost()->setResponseStatusCode($exception->getStatusCode());
$dataService->getHost()->setResponseContentType($responseContentType);
$responseBody = null;
if (strcasecmp($responseContentType, ODataConstants::MIME_APPLICATION_XML) == 0) {
$responseBody = AtomODataWriter::serializeException($exception, true);
} else {
$responseBody = JsonODataWriter::serializeException($exception, true);
}
$dataService->getHost()->getWebOperationContext()->outgoingResponse()->setStream($responseBody);
}
}
/**
* Pushes a segment for the current navigation property being written out.
* Note: Refer 'ObjectModelSerializerNotes.txt' for more details about
* 'Segment Stack' and this method.
* Note: Calls to this method should be balanced with calls to popSegment.
*
* @param ResourceProperty &$resourceProperty Current navigation property
* being written out
*
* @return true if a segment was pushed, false otherwise
*
* @throws InvalidOperationException If this function invoked with non-navigation
* property instance.
*/
private function _pushSegmentForNavigationProperty(ResourceProperty &$resourceProperty)
{
if ($resourceProperty->getTypeKind() == ResourceTypeKind::ENTITY) {
$this->assert(!empty($this->_segmentNames), '!is_empty($this->_segmentNames');
$currentResourceSetWrapper = $this->_getCurrentResourceSetWrapper();
$currentResourceType = $currentResourceSetWrapper->getResourceType();
$currentResourceSetWrapper = $this->_dataService->getMetadataQueryProviderWrapper()->getResourceSetWrapperForNavigationProperty($currentResourceSetWrapper, $currentResourceType, $resourceProperty);
$this->assert(!is_null($currentResourceSetWrapper), '!null($currentResourceSetWrapper)');
return $this->_pushSegment($resourceProperty->getName(), $currentResourceSetWrapper);
} else {
throw new InvalidOperationException('pushSegmentForNavigationProperty should not be called with non-entity type');
}
}
/**
* Gets the response format for the requested resource.
*
* @param RequestDescription &$requestDescription The request submitted by
* client and it's execution
* result.
* @param UriProcessor &$uriProcessor The reference to the
* UriProcessor.
* @param DataService &$dataService Reference to the data
* service instance
* @param string &$responseContentType On Return, this will hold
* the response content-type, a null value means the requested resource
* is named stream and IDSSP2::getStreamContentType returned null.
*
* @return ResponseFormat The format in which response needs to be serialized.
*
* @throws ODataException, HttpHeaderFailure
*/
public static function getResponseFormat(RequestDescription &$requestDescription, UriProcessor &$uriProcessor, DataService &$dataService, &$responseContentType)
{
// The Accept request-header field specifies media types which are
// acceptable for the response
$requestAcceptText = $dataService->getHost()->getRequestAccept();
$responseFormat = ResponseFormat::UNSUPPORTED;
$requestTargetKind = $requestDescription->getTargetKind();
if ($requestDescription->isLinkUri()) {
$requestTargetKind = RequestTargetKind::LINK;
}
if ($requestTargetKind == RequestTargetKind::METADATA) {
$responseContentType = HttpProcessUtility::selectMimeType($requestAcceptText, array(ODataConstants::MIME_APPLICATION_XML));
if (!is_null($responseContentType)) {
$responseFormat = ResponseFormat::METADATA_DOCUMENT;
}
} else {
if ($requestTargetKind == RequestTargetKind::SERVICE_DIRECTORY) {
$responseContentType = HttpProcessUtility::selectMimeType($requestAcceptText, array(ODataConstants::MIME_APPLICATION_XML, ODataConstants::MIME_APPLICATION_ATOMSERVICE, ODataConstants::MIME_APPLICATION_JSON));
if (!is_null($responseContentType)) {
$responseFormat = self::_getContentFormat($responseContentType);
}
} else {
if ($requestTargetKind == RequestTargetKind::PRIMITIVE_VALUE) {
$supportedResponseMimeTypes = array(ODataConstants::MIME_TEXTPLAIN);
$responseFormat = ResponseFormat::TEXT;
if ($requestDescription->getIdentifier() != '$count') {
$projectedProperty = $requestDescription->getProjectedProperty();
self::assert(!is_null($projectedProperty), '!is_null($projectedProperty)');
$type = $projectedProperty->getInstanceType();
self::assert(!is_null($type) && array_search('ODataProducer\\Providers\\Metadata\\Type\\IType', class_implements($type)) !== false, '!is_null($type) && array_search(\'ODataProducer\\Providers\\Metadata\\Type\\IType\', class_implements($type)) !== false');
if ($type instanceof Binary) {
$supportedResponseMimeTypes = array(ODataConstants::MIME_APPLICATION_OCTETSTREAM);
$responseFormat = ResponseFormat::BINARY;
}
}
$responseContentType = HttpProcessUtility::selectMimeType($requestAcceptText, $supportedResponseMimeTypes);
if (is_null($responseContentType)) {
$responseFormat = ResponseFormat::UNSUPPORTED;
}
} else {
if ($requestTargetKind == RequestTargetKind::PRIMITIVE || $requestTargetKind == RequestTargetKind::COMPLEX_OBJECT || $requestTargetKind == RequestTargetKind::BAG || $requestTargetKind == RequestTargetKind::LINK) {
$responseContentType = HttpProcessUtility::selectMimeType($requestAcceptText, array(ODataConstants::MIME_APPLICATION_XML, ODataConstants::MIME_TEXTXML, ODataConstants::MIME_APPLICATION_JSON));
if (!is_null($responseContentType)) {
$responseFormat = self::_getContentFormat($responseContentType);
}
} else {
if ($requestTargetKind == RequestTargetKind::RESOURCE) {
$responseContentType = HttpProcessUtility::selectMimeType($requestAcceptText, array(ODataConstants::MIME_APPLICATION_ATOM, ODataConstants::MIME_APPLICATION_JSON));
if (!is_null($responseContentType)) {
$responseFormat = self::_getContentFormat($responseContentType);
}
} else {
if ($requestTargetKind == RequestTargetKind::MEDIA_RESOURCE) {
$responseFormat = ResponseFormat::BINARY;
if ($requestDescription->isNamedStream() || $requestDescription->getTargetResourceType()->isMediaLinkEntry()) {
$streamInfo = $requestDescription->getResourceStreamInfo();
//Execute the query as we need media resource instance for
//further processing
$uriProcessor->execute();
$requestDescription->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
$contentType = $dataService->getStreamProvider()->getStreamContentType($requestDescription->getTargetResult(), $streamInfo);
if (!is_null($contentType)) {
$responseContentType = HttpProcessUtility::selectMimeType($requestAcceptText, array($contentType));
if (is_null($responseContentType)) {
$responseFormat = ResponseFormat::UNSUPPORTED;
}
} else {
// For NamedStream 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
$responseContentType = null;
}
} else {
ODataException::createBadRequestError(Messages::badRequestInvalidUriForMediaResource($dataService->getHost()->getAbsoluteRequestUri()->getUrlAsString()));
}
}
}
}
}
}
}
if ($responseFormat == ResponseFormat::UNSUPPORTED) {
throw new ODataException(Messages::dataServiceExceptionUnsupportedMediaType(), 415);
}
return $responseFormat;
}
/**
* This function is used to perform following checking (validation)
* for capability negotiation.
* (1) Check client request's 'DataServiceVersion' header value is
* less than or equal to the minimum version required to intercept
* the response
* (2) Check client request's 'MaxDataServiceVersion' header value is
* less than or equal to the version of protocol required to generate
* the response
* (3) Check the configured maximum protocol version is less than or equal
* to the version of protocol required to generate the response
* In addition to these checking, this function is also responsible for
* initializing the properties respresenting 'DataServiceVersion' and
* 'MaxDataServiceVersion'.
*
* @param RequestDescription $requestDescription The request description object
* @param DataService $dataService The Service to check
*
* @return void
*
* @throws ODataException If any of the above 3 check fails.
*/
public static function checkVersion(RequestDescription $requestDescription, DataService $dataService)
{
if (is_null($requestDescription->_requestDataServiceVersion)) {
$version = $dataService->getHost()->getRequestVersion();
//'DataServiceVersion' header not present in the request, so use
//default value as the maximum version number that the server can
//interpret.
if (is_null($version)) {
$knownVersions = $requestDescription::getKnownDataServiceVersions();
$version = $knownVersions[count($knownVersions) - 1];
} else {
$version = $requestDescription::_validateAndGetVersion($version, ODataConstants::ODATAVERSIONHEADER);
}
$requestDescription->_requestDataServiceVersion = $version;
}
if (is_null($requestDescription->_requestMaxDataServiceVersion)) {
$version = $dataService->getHost()->getRequestMaxVersion();
//'MaxDataServiceVersion' header not present in the request, so use
//default value as the maximum version number that the server can
//interpret.
if (is_null($version)) {
$knownVersions = $requestDescription::getKnownDataServiceVersions();
$version = $knownVersions[count($knownVersions) - 1];
} else {
$version = $requestDescription::_validateAndGetVersion($version, ODataConstants::ODATAMAXVERSIONHEADER);
}
$requestDescription->_requestMaxDataServiceVersion = $version;
}
if ($requestDescription->_requestDataServiceVersion->compare($requestDescription->_minimumRequiredClientVersion) < 0) {
ODataException::createBadRequestError(Messages::requestDescriptionDataServiceVersionTooLow($requestDescription->_requestDataServiceVersion->toString(), $requestDescription->_minimumRequiredClientVersion->toString()));
}
if ($requestDescription->_requestMaxDataServiceVersion->compare($requestDescription->_responseDataServiceVersion) < 0) {
ODataException::createBadRequestError(Messages::requestDescriptionDataServiceVersionTooLow($requestDescription->_requestMaxDataServiceVersion->toString(), $requestDescription->_responseDataServiceVersion->toString()));
}
$configuration = $dataService->getServiceConfiguration();
$maxConfiguredProtocolVersion = $configuration->getMaxDataServiceVersionObject();
if ($maxConfiguredProtocolVersion->compare($requestDescription->_responseDataServiceVersion) < 0) {
ODataException::createBadRequestError(Messages::requestDescriptionResponseVersionIsBiggerThanProtocolVersion($requestDescription->_responseDataServiceVersion->toString(), $maxConfiguredProtocolVersion->toString()));
}
}
/**
* Check whether implementor modified content type or etag header
* if so throw InvalidOperationException.
*
* @param string $methodName NAme of the method
*
* @return void
*
* @throws InvalidOperationException
*/
private function _verifyContentTypeOrETagModified($methodName)
{
if ($this->_responseContentType !== $this->_dataService->getHost()->getResponseContentType() || $this->_responseETag !== $this->_dataService->getHost()->getResponseETag()) {
throw new InvalidOperationException(Messages::dataServiceStreamProviderWrapperMustNotSetContentTypeAndEtag($methodName));
}
}
