public void DeleteStream(object entity, DataServiceOperationContext operationContext)
{
var attachment = entity as Attachment;
if (attachment == null)
{
throw new DataServiceException(500, "No such attachment");
}
try
{
// Delete the requested file by using the key value.
attachment.Person = null;
attachment.PersonWithAvatar = null;
attachment.Discussion = null;
attachment.ArgPoint = null;
var mediaData = attachment.MediaData;
attachment.MediaData = null;
if (mediaData != null)
context.DeleteObject(mediaData);
context.DeleteObject(attachment);
}
catch (IOException ex)
{
throw new DataServiceException("Error during attachment removal: ", ex);
}
}
public Stream GetReadStream(object entity, string etag, bool?
checkETagForEquality,
DataServiceOperationContext operationContext)
{
if (checkETagForEquality != null)
{
// This stream provider implementation does not support
// ETag headers for media resources. This means that we do not track
// concurrency for a media resource and last-in wins on updates.
throw new DataServiceException(400,
"This sample service does not support the ETag header for a media resource.");
}
Attachment attach = entity as Attachment;
if (attach == null)
{
throw new DataServiceException(500, "No such attachment");
}
if (attach.MediaData == null || attach.MediaData.Data == null)
{
throw new DataServiceException(500, "Cannot find requested media resource");
}
return new MemoryStream(attach.MediaData.Data);
}
public override Stream GetWriteStream(object entity, string etag, bool? checkETagForEquality, DataServiceOperationContext operationContext)
{
var attachment = entity as Attachment;
var tempFile = Path.Combine(Path.GetTempPath(), attachment.Id);
return new FileStream(tempFile, FileMode.Create, FileAccess.ReadWrite);
}
Dictionary<string, string> GetQueryParameterBag(DataServiceOperationContext serviceOperationContext)
{
Dictionary<string, string> ParameterBag = null;
string query = serviceOperationContext.AbsoluteRequestUri.Query;
if (!string.IsNullOrEmpty(query))
{
ParameterBag = new Dictionary<string, string>();
query = query.Remove(0, 1);
string[] param = query.Split('&');
string paramName;
string paramValue;
foreach (var item in param)
{
//Skip OData supported parameters [see Ronald`s Comment]
if (!item.StartsWith("$"))
{
paramName = item.Substring(0, item.IndexOf("="));
paramValue = item.Substring(item.IndexOf("=") + 1);
ParameterBag.Add(paramName, paramValue);
}
}
}
return ParameterBag;
}
//Named Resource using .NET Framework 4.0
public Stream GetReadStream40(object entity, ResourceProperty resourceProperty, string etag, bool? checkETagForEquality, DataServiceOperationContext operationContext)
{
vProductCatalog image = entity as vProductCatalog;
//ThumbnailPhoto and LargePhoto
string imageFilePath = HostingEnvironment.MapPath("~/ProductImages/" + resourceProperty.Name);
if (checkETagForEquality != null)
{
// This stream provider implementation does not support
// ETag headers for media resources. This means that we do not track
// concurrency for a media resource and last-in wins on updates.
throw new DataServiceException(400, "This sample service does not support the ETag header for a media resource.");
}
if (image == null)
{
throw new DataServiceException(500, "Internal Server Error.");
}
// Build the full path to the stored image file, which includes the entity key.
string fullImageFilePath = string.Format(@"{0}\{1}.gif", imageFilePath, this.ProductPhotoID(image.ProductID));
if (!File.Exists(fullImageFilePath))
{
throw new DataServiceException(500, "The image could not be found.");
}
// Return a stream that contains the requested file.
return new FileStream(fullImageFilePath, FileMode.Open);
}
private static void FixUpDataServiceUrisForCuratedFeedName(
DataServiceOperationContext operationContext,
string curatedFeedName)
{
// AVERT YOUR EYES!
// This is an *evil* hack to get proper URIs into the data servive's output, e.g. /api/v2/curated-feeds/{name}.
// Without this, the URIs in the data service will be wrong, and won't work if a client tried to use them.
var fixedUpSeriveUri = operationContext.AbsoluteServiceUri.AbsoluteUri.Replace("/api/v2/curated-feed/", "/api/v2/curated-feeds/" + curatedFeedName + "/");
var fixedUpRequestUri = operationContext.AbsoluteRequestUri.AbsoluteUri.Replace("/api/v2/curated-feed/", "/api/v2/curated-feeds/" + curatedFeedName + "/");
// The URI needs to be fixed up both on the actual IDataService host (hostInterface) and the service host wrapper (hostWrapper)
// Null checks aren't really worth much here. If it does break, it'll result in a 500 to the client.
var hostInterfaceField = operationContext.GetType().GetField("hostInterface", BindingFlags.NonPublic | BindingFlags.Instance);
var hostInterface = hostInterfaceField.GetValue(operationContext);
var hostWrapperField = operationContext.GetType().GetField("hostWrapper", BindingFlags.NonPublic | BindingFlags.Instance);
var hostWrapper = hostWrapperField.GetValue(operationContext);
// Fix up the service URIs
var interfaceServiceUriField = hostInterface.GetType().GetField("absoluteServiceUri", BindingFlags.NonPublic | BindingFlags.Instance);
interfaceServiceUriField.SetValue(hostInterface, new Uri(fixedUpSeriveUri));
var wrapperServiceUriField = hostWrapper.GetType().GetField("absoluteServiceUri", BindingFlags.NonPublic | BindingFlags.Instance);
wrapperServiceUriField.SetValue(hostWrapper, new Uri(fixedUpSeriveUri));
// Fix up the request URIs
var interfaceRequestUriField = hostInterface.GetType().GetField("absoluteRequestUri", BindingFlags.NonPublic | BindingFlags.Instance);
interfaceRequestUriField.SetValue(hostInterface, new Uri(fixedUpRequestUri));
var wrapperRequestUriField = hostWrapper.GetType().GetField("absoluteRequestUri", BindingFlags.NonPublic | BindingFlags.Instance);
wrapperRequestUriField.SetValue(hostWrapper, new Uri(fixedUpRequestUri));
// Take a shower.
}
public Uri GetReadStreamUri(object entity, DataServiceOperationContext operationContext)
{
var publishedPackage = (PublishedPackage)entity;
string absoluteUri = HttpContext.Current.Request.Url.AbsoluteUri;
string siteRoot = absoluteUri.Substring(0, absoluteUri.IndexOf("/FeedService.svc/Packages"));
string relativeUri = string.Format("{0}/Package/Download/{1}/{2}", siteRoot, publishedPackage.Id, publishedPackage.Version);
return new Uri(relativeUri);
}
/// <summary>Initalizes a new <see cref="ProcessRequestArgs"/> instance.</summary>
/// <param name="requestUri">The uri for this request.</param>
/// <param name="isBatchOperation">True if this request is a operation specified within a batch request, otherwise false.</param>
/// <param name="operationContext">Context about the current operation being processed.</param>
internal ProcessRequestArgs(Uri requestUri, bool isBatchOperation, DataServiceOperationContext operationContext)
{
System.Diagnostics.Debug.Assert(requestUri != null, "requestUri != null");
this.requestUri = requestUri;
this.isBatchOperation = isBatchOperation;
this.OperationContext = operationContext;
}
/// <summary>Initalizes a new <see cref="ProcessRequestArgs"/> instance.</summary>
/// <param name="requestUri">The uri for this request.</param>
/// <param name="isBatchOperation">True if this request is a operation specified within a batch request, otherwise false.</param>
/// <param name="operationContext">Context about the current operation being processed.</param>
internal ProcessRequestArgs(Uri requestUri, bool isBatchOperation, DataServiceOperationContext operationContext)
{
System.Diagnostics.Debug.Assert(requestUri != null, "requestUri != null");
this.requestUri = requestUri;
this.isBatchOperation = isBatchOperation;
this.OperationContext = operationContext;
}
public override Uri GetReadStreamUri(object entity, DataServiceOperationContext operationContext)
{
var package = (DataServicePackage)entity;
var vpath = GetPackageDownloadPath(package);
return new Uri(operationContext.AbsoluteRequestUri, vpath);
}
private void InitializeVersion(DataServiceOperationContext operationContext)
{
if (this.requestVersion == null)
{
this.requestVersion = operationContext.Host.RequestVersion;
}
if (this.requestMaxVersion == null)
{
this.requestMaxVersion = operationContext.Host.RequestMaxVersion;
}
}
public Stream GetReadStream(object entity, string etag, bool? checkETagForEquality, DataServiceOperationContext operationContext) {
if(checkETagForEquality != null) {
throw new DataServiceException(400, "This sample service does not support the ETag header for a media resource.");
}
var imageSource = entity as IImageSource;
if(imageSource == null) {
throw new DataServiceException(500, "Internal Server Error.");
}
var image = imageSource.Image;
return new MemoryStream(image);
}
public string ResolveType(string entitySetName, DataServiceOperationContext operationContext)
{
// Only be handle ProductCatalog types.
if (entitySetName == "ProductCatalog")
{
return "AdventureWorks_ODataService.ProductCatalog";
}
else
{
// This will raise an DataServiceException.
return null;
}
}
public static void CorrelateWithClientRequestId(DataServiceOperationContext context)
{
Guid guid;
string str = context.RequestHeaders.Get("client-request-id");
if (!string.IsNullOrWhiteSpace(str) && Guid.TryParse(str, out guid))
{
TraceHelper.Current.CorrelateWithActivity(guid);
if (TraceHelper.IsTestHookEnabled)
{
TraceHelper.TestHookClientRequestGuid = guid;
}
}
}
/// <summary>
/// Returns the default stream that is associated with an entity that has a binary property.
/// </summary>
/// <param name="entity">The entity for which the descriptor object should be returned.</param>
/// <param name="etag">The eTag value sent as part of the HTTP request that is sent to the data service.</param>
/// <param name="checkETagForEquality">A nullable System.Boolean value that determines the type of eTag that is used.</param>
/// <param name="operationContext">The System.Data.Services.DataServiceOperationContext instance that processes the request.</param>
/// <returns>The data System.IO.Stream that contains the binary property data of the entity.</returns>
public virtual Stream GetReadStream(object entity, string etag, bool? checkETagForEquality, DataServiceOperationContext operationContext)
{
var streameable = entity as IStreamEntity;
if (streameable == null)
return null;
using (var client = new WebClient())
{
var bytes = client.DownloadData(streameable.GetUrlForStreaming());
return new MemoryStream(bytes);
}
}
public override Stream GetReadStream(object entity, string etag, bool? checkETagForEquality, DataServiceOperationContext operationContext)
{
var streameable = entity as IStreamEntity;
if (streameable == null)
{
return null;
}
using (var client = new WebClient { Credentials = this.credentials })
{
var bytes = client.DownloadData(streameable.GetUrlForStreaming());
return new MemoryStream(bytes);
}
}
public IEnumerable<OperationWrapper> GetServiceActions(DataServiceOperationContext operationContext)
{
if (this.TryLoadActionProvider())
{
IEnumerable<ServiceAction> serviceActions = this.actionProvider.GetServiceActions(operationContext);
if (serviceActions != null)
{
foreach (ServiceAction iteratorVariable1 in serviceActions)
{
OperationWrapper iteratorVariable2 = this.dataService.Provider.ValidateOperation(iteratorVariable1);
if (iteratorVariable2 != null)
{
yield return iteratorVariable2;
}
}
}
}
}
//Named Resource using .NET Framework 4.5
public Stream GetReadStream(object entity, ResourceProperty resourceProperty, string etag, bool? checkETagForEquality, DataServiceOperationContext operationContext)
{
vProductCatalog image = entity as vProductCatalog;
if (checkETagForEquality != null)
{
// This stream provider implementation does not support
// ETag headers for media resources. This means that we do not track
// concurrency for a media resource and last-in wins on updates.
throw new DataServiceException(400, "This sample service does not support the ETag header for a media resource.");
}
if (image == null)
{
throw new DataServiceException(500, "Internal Server Error.");
}
// Return a stream that contains the requested ThumbnailPhoto or LargePhoto
return ProductPhoto(image.ProductID, resourceProperty.Name);
}
public IEnumerable<OperationWrapper> GetServiceActionsByBindingParameterType(DataServiceOperationContext operationContext, ResourceType bindingParameterType)
{
Func<ServiceAction, OperationWrapper> selector = null;
IEnumerable<OperationWrapper> emptyServiceOperationWrapperEnumeration = EmptyServiceOperationWrapperEnumeration;
HashSet<string> existingActionNames = new HashSet<string>(EqualityComparer<string>.Default);
do
{
IEnumerable<OperationWrapper> enumerable2;
if (!this.ServiceActionByResourceTypeCache.TryGetValue(bindingParameterType, out enumerable2))
{
if (this.TryLoadActionProvider())
{
IEnumerable<ServiceAction> serviceActionsByBindingParameterType = this.actionProvider.GetServiceActionsByBindingParameterType(operationContext, bindingParameterType);
if ((serviceActionsByBindingParameterType != null) && serviceActionsByBindingParameterType.Any<ServiceAction>())
{
if (selector == null)
{
selector = serviceAction => this.ValidateCanAdvertiseServiceAction(bindingParameterType, serviceAction, existingActionNames);
}
enumerable2 = (from serviceOperationWrapper in serviceActionsByBindingParameterType.Select<ServiceAction, OperationWrapper>(selector)
where serviceOperationWrapper != null
select serviceOperationWrapper).ToArray<OperationWrapper>();
}
}
if (enumerable2 == null)
{
enumerable2 = EmptyServiceOperationWrapperEnumeration;
}
this.ServiceActionByResourceTypeCache[bindingParameterType] = enumerable2;
}
if (enumerable2.Any<OperationWrapper>())
{
emptyServiceOperationWrapperEnumeration = emptyServiceOperationWrapperEnumeration.Concat<OperationWrapper>(enumerable2);
}
bindingParameterType = bindingParameterType.BaseType;
}
while (bindingParameterType != null);
return emptyServiceOperationWrapperEnumeration;
}
public string GetStreamContentType(object entity, DataServiceOperationContext operationContext)
{
// Get the PhotoInfo entity instance.
Attachment attach = entity as Attachment;
if (attach == null)
{
throw new DataServiceException(500, "Internal Server Error.");
}
switch ((AttachmentFormat) attach.Format)
{
case AttachmentFormat.Bmp:
return "image/x-ms-bmp";
case AttachmentFormat.Jpg:
return "image/jpeg";
case AttachmentFormat.Png:
return "image/x-png";
case AttachmentFormat.Pdf:
return "application/pdf";
default:
return "application/x-unknown";
}
}
internal MetadataProviderEdmModel(DataServiceProviderWrapper provider, DataServiceOperationContext operationContext, DataServiceStreamProviderWrapper streamProviderWrapper)
{
this.metadataProvider = provider;
this.operationContext = operationContext;
this.streamProviderWrapper = streamProviderWrapper;
this.schemaTypeCache = new Dictionary<string, IEdmSchemaType>(StringComparer.Ordinal);
this.resourceTypesPerNamespaceCache = new Dictionary<string, HashSet<ResourceType>>(StringComparer.Ordinal);
this.entityContainerCache = new Dictionary<string, MetadataProviderEdmEntityContainer>(StringComparer.Ordinal);
this.primitiveOrComplexCollectionTypeCache = new Dictionary<ResourceType, IEdmCollectionType>(EqualityComparer<ResourceType>.Default);
this.entityPrimitiveOrComplexCollectionTypeCache = new Dictionary<ResourceType, IEdmCollectionType>(EqualityComparer<ResourceType>.Default);
this.derivedTypeMappings = new Dictionary<IEdmStructuredType, List<IEdmStructuredType>>(EqualityComparer<IEdmStructuredType>.Default);
this.associationSetByKeyCache = new Dictionary<string, string>(StringComparer.Ordinal);
Version version = this.metadataProvider.Configuration.DataServiceBehavior.MaxProtocolVersion.ToVersion();
this.SetDataServiceVersion(version);
Version version2 = null;
if (!MetadataProviderUtils.DataServiceEdmVersionMap.TryGetValue(version, out version2))
{
this.SetEdmVersion(Microsoft.Data.Edm.Library.EdmConstants.EdmVersionLatest);
}
else
{
this.SetEdmVersion(version2);
}
}
/// <summary>
/// Returns the URI that is used to request the data stream that is associated with the binary property of an entity.
/// </summary>
/// <param name="entity">The entity that has the associated binary data stream.</param>
/// <param name="operationContext">The System.Data.Services.DataServiceOperationContext
/// instance used by the data service to process the request.</param>
/// <returns>A System.Uri value that is used to request the binary data stream.</returns>
public virtual Uri GetReadStreamUri(object entity, DataServiceOperationContext operationContext)
{
var streameable = entity as IStreamEntity;
return streameable != null ? streameable.GetUrlForStreaming() : null;
}
internal void AssertDebugStateDuringRequestProcessing(DataServiceOperationContext operationContext)
{
}
/// <summary>
/// This method is invoked by the data services framework to obtain metadata about the stream associated with the specified entity.
/// </summary>
/// <param name="entity">The entity for which the descriptor object should be returned.</param>
/// <param name="operationContext">The System.Data.Services.DataServiceOperationContext instance that processes the request.</param>
public virtual void DeleteStream(object entity, DataServiceOperationContext operationContext)
{
throw new NotImplementedException();
}
/// <summary>
/// Returns a namespace-qualified type name that represents the type that the data service
/// runtime must create for the Media Link Entry that is associated with the data stream
/// for the Media Resource that is being inserted.
/// </summary>
/// <param name="entitySetName">Fully-qualified entity set name.</param>
/// <param name="operationContext">The System.Data.Services.DataServiceOperationContext
/// instance that is used by the data service to process the request.</param>
/// <returns>A namespace-qualified type name.</returns>
public virtual string ResolveType(string entitySetName, DataServiceOperationContext operationContext)
{
throw new NotImplementedException();
}
/// <summary>
/// Returns the stream that the data service uses to write the contents of a binary property that is associated with an entity.
/// </summary>
/// <param name="entity">The entity that has the associated binary stream.</param>
/// <param name="etag">The eTag value that is sent as part of the HTTP request that is sent to the data service.</param>
/// <param name="checkETagForEquality">A nullable System.Boolean value that determines the type of eTag is used.</param>
/// <param name="operationContext">The System.Data.Services.DataServiceOperationContext
/// instance that is used by the data service to process the request.</param>
/// <returns>A valid System.Stream the data service uses to write the contents of a
/// binary property that is associated with the entity.</returns>
public virtual Stream GetWriteStream(object entity, string etag, bool? checkETagForEquality, DataServiceOperationContext operationContext)
{
throw new NotImplementedException();
}
internal static Uri GetResultUri(DataServiceOperationContext operationContext)
{
UriBuilder builder = new UriBuilder(operationContext.AbsoluteRequestUri) {
Query = null
};
if (builder.Path.EndsWith("()", StringComparison.Ordinal))
{
builder.Path = builder.Path.Substring(0, builder.Path.Length - 2);
}
return builder.Uri;
}
public virtual string GetStreamContentType(object entity, DataServiceOperationContext operationContext)
{
return ContentType;
}
/// <summary>
/// Constructs a new instance of DataServicePipelineEventArgs object
/// </summary>
/// <param name="operationContext">Context for the operation which the current event is fired for.</param>
internal DataServiceProcessingPipelineEventArgs(DataServiceOperationContext operationContext)
{
Debug.Assert(operationContext != null, "operationContext != null");
this.operationContext = operationContext;
}
internal static Uri GetAbsoluteUriFromReference(string reference, DataServiceOperationContext operationContext)
{
return GetAbsoluteUriFromReference(reference, operationContext.AbsoluteServiceUri, operationContext.Host.RequestVersion);
}
internal void AssertDebugStateDuringRequestProcessing(DataServiceOperationContext operationContext)
{
}
public virtual string GetStreamETag(object entity, DataServiceOperationContext operationContext)
{
return ETag;
}
internal DataServiceProcessingPipelineEventArgs(DataServiceOperationContext operationContext)
{
this.operationContext = operationContext;
}
/// <summary>
/// Returns the eTag of the data stream that is associated with the specified entity.
/// </summary>
/// <param name="entity">The entity that has the associated binary data stream.</param>
/// <param name="operationContext">The System.Data.Services.DataServiceOperationContext
/// instance used by the data service to process the request.</param>
/// <returns>ETag of the stream associated with the entity.</returns>
public virtual string GetStreamETag(object entity, DataServiceOperationContext operationContext)
{
var streameable = entity as IStreamEntity;
return streameable != null ? streameable.GetStreamETag() : null;
}
internal static void UpdateMetadataVersion(DataServiceProviderWrapper provider, DataServiceOperationContext operationContext, out Version metadataVersion, out MetadataEdmSchemaVersion edmSchemaVersion)
{
metadataVersion = Version1Dot0;
edmSchemaVersion = MetadataEdmSchemaVersion.Version1Dot0;
if (!provider.IsV1Provider)
{
edmSchemaVersion = WebUtil.RaiseMetadataEdmSchemaVersion(edmSchemaVersion, MetadataEdmSchemaVersion.Version1Dot1);
}
foreach (ResourceType type in provider.GetVisibleTypes(operationContext))
{
UpdateMetadataVersionForResourceType(type, ref metadataVersion, ref edmSchemaVersion);
}
if (provider.HasAnnotations(operationContext))
{
edmSchemaVersion = WebUtil.RaiseMetadataEdmSchemaVersion(edmSchemaVersion, MetadataEdmSchemaVersion.Version3Dot0);
}
foreach (OperationWrapper wrapper in provider.GetVisibleOperations(operationContext))
{
if (wrapper.Kind == OperationKind.Action)
{
edmSchemaVersion = WebUtil.RaiseMetadataEdmSchemaVersion(edmSchemaVersion, MetadataEdmSchemaVersion.Version3Dot0);
metadataVersion = WebUtil.RaiseVersion(metadataVersion, Version3Dot0);
break;
}
if (((wrapper.ResultKind == ServiceOperationResultKind.Void) || (wrapper.ResultKind == ServiceOperationResultKind.QueryWithSingleResult)) || (((wrapper.ResultKind == ServiceOperationResultKind.DirectValue) || (wrapper.ResultType.ResourceTypeKind == ResourceTypeKind.ComplexType)) || (wrapper.ResultType.ResourceTypeKind == ResourceTypeKind.Primitive)))
{
edmSchemaVersion = WebUtil.RaiseMetadataEdmSchemaVersion(edmSchemaVersion, MetadataEdmSchemaVersion.Version1Dot1);
break;
}
}
}
public virtual Uri GetReadStreamUri(object entity, DataServiceOperationContext operationContext)
{
throw new NotSupportedException();
}
internal ProcessRequestArgs(Uri requestUri, bool isBatchOperation, DataServiceOperationContext operationContext)
{
this.requestUri = requestUri;
this.isBatchOperation = isBatchOperation;
this.OperationContext = operationContext;
}
