/// <summary> /// If the provider implements IConcurrencyProvider, then this method passes the etag values /// to the provider, otherwise compares the etag itself. /// </summary> /// <param name="resourceCookie">etag values for the given resource.</param> /// <param name="container">container for the given resource.</param> internal void SetETagValues(object resourceCookie, ResourceSetWrapper container) { Debug.Assert(resourceCookie != null, "resourceCookie != null"); Debug.Assert(container != null, "container != null"); DataServiceHostWrapper host = this.service.OperationContext.Host; Debug.Assert(String.IsNullOrEmpty(host.RequestIfNoneMatch), "IfNoneMatch header cannot be specified for Update/Delete operations"); // Resolve the cookie first to the actual resource type object actualEntity = this.ResolveResource(resourceCookie); Debug.Assert(actualEntity != null, "actualEntity != null"); ResourceType resourceType = WebUtil.GetNonPrimitiveResourceType(this.service.Provider, actualEntity); Debug.Assert(resourceType != null, "resourceType != null"); IList <ResourceProperty> etagProperties = this.service.Provider.GetETagProperties(container.Name, resourceType); if (etagProperties.Count == 0) { if (!String.IsNullOrEmpty(host.RequestIfMatch)) { throw DataServiceException.CreateBadRequestError(Strings.Serializer_NoETagPropertiesForType); } // If the type has no etag properties, then we do not need to do any etag checks return; } // If the provider implements IConcurrencyProvider, then we need to call the provider // and pass the etag values. Else, we need to compare the etag values ourselves. IDataServiceUpdateProvider concurrencyProvider = this.updateProvider as IDataServiceUpdateProvider; if (concurrencyProvider != null) { bool?checkForEquality = null; IEnumerable <KeyValuePair <string, object> > etagValues = null; if (!String.IsNullOrEmpty(host.RequestIfMatch)) { checkForEquality = true; etagValues = ParseETagValue(etagProperties, host.RequestIfMatch); } else { etagValues = new KeyValuePair <string, object> [0]; } concurrencyProvider.SetConcurrencyValues(resourceCookie, checkForEquality, etagValues); } else if (String.IsNullOrEmpty(host.RequestIfMatch)) { throw DataServiceException.CreateBadRequestError(Strings.DataService_CannotPerformOperationWithoutETag(resourceType.FullName)); } else if (host.RequestIfMatch != XmlConstants.HttpAnyETag) { // Compare If-Match header value with the current etag value, if the If-Match header value is not equal to '*' string etagValue = WebUtil.GetETagValue(resourceCookie, resourceType, etagProperties, this.service, false /*getMethod*/); Debug.Assert(!String.IsNullOrEmpty(etagValue), "etag value can never be null"); if (etagValue != host.RequestIfMatch) { throw DataServiceException.CreatePreConditionFailedError(Strings.Serializer_ETagValueDoesNotMatch); } } }
internal ODataResponseMessage(DataServiceHostWrapper host) { this.host = host; }
/// <summary> /// Creates a new instance of the host wrapper to cache the request headers and to validate the data from the host interface. /// </summary> internal void InitializeAndCacheHeaders() { Debug.Assert(this.hostInterface != null, "this.hostInterface != null"); this.hostWrapper = new DataServiceHostWrapper(this.hostInterface); }
internal ODataRequestMessage(DataServiceHostWrapper host) { this.host = host; this.ContentType = this.host.RequestContentType; }