private Stream GetWriteStreamInternal(object entity, ResourceProperty streamProperty, string etag, bool?checkETagForEquality, DataServiceOperationContext operationContext)
{
this.ThrowIfDisposed();
CheckArgumentNull(entity, "entity");
CheckArgumentNull(operationContext, "operationContext");
ValidateEntity(entity, streamProperty);
DSPMediaResource mediaResource;
if (!this.streamStorage.TryGetMediaResource(entity, streamProperty, out mediaResource))
{
mediaResource = this.streamStorage.CreateMediaResource(entity, streamProperty);
}
ValidateETag(etag, checkETagForEquality, operationContext, mediaResource);
if (operationContext.RequestMethod == "POST")
{
if (streamProperty != null)
{
throw new InvalidOperationException("POST is allowed only for default streams.");
}
string slug = operationContext.RequestHeaders["Slug"];
if (!string.IsNullOrEmpty(slug))
{
this.ApplySlugHeader(slug, entity);
}
}
else if (operationContext.RequestMethod != "PUT")
{
throw new InvalidOperationException("Unsupported http method '" + operationContext.RequestMethod + "'.");
}
mediaResource.ContentType = operationContext.RequestHeaders["Content-Type"];
if (string.IsNullOrEmpty(mediaResource.ContentType))
{
throw new InvalidOperationException("Content-Type header missing.");
}
mediaResource.Etag = DSPMediaResource.GenerateStreamETag();
return(mediaResource.GetWriteStream());
}
/// <summary>
/// Validates etag arguments
/// </summary>
/// <param name="etag">etag value</param>
/// <param name="checkETagForEquality">If the etag was sent as the value of an If-None-Match request header, the value of �checkETagForEquality� will be set to false</param>
private static void ValidateETag(string etag, bool?checkETagForEquality, DataServiceOperationContext operationContext, DSPMediaResource mediaResource)
{
if (checkETagForEquality.HasValue)
{
CheckStringArgumentNull(etag, "etag");
}
else if (!string.IsNullOrEmpty(etag))
{
throw new ArgumentException("'etag' argument should be null when 'checkETagForEquality' argument has no value");
}
// We do not check etag for POST
if (operationContext.RequestMethod.Equals("POST", StringComparison.OrdinalIgnoreCase))
{
return;
}
string currentEtag = mediaResource.Etag;
if (!operationContext.RequestMethod.Equals("GET", StringComparison.OrdinalIgnoreCase))
{
if (!string.IsNullOrEmpty(currentEtag) && !checkETagForEquality.HasValue)
{
throw new DataServiceException(400, "Since the target media resource has an etag defined, If-Match/If-Not-Match HTTP header must be specified.");
}
}
if (checkETagForEquality.HasValue)
{
if (checkETagForEquality.Value == true && etag != currentEtag)
{
throw new DataServiceException(412, "If-Match precondition failed for target media resource. Thrown by DSPStreamProvider.");
}
if (checkETagForEquality.Value == false && etag == currentEtag)
{
if (operationContext.RequestMethod.Equals("GET", StringComparison.OrdinalIgnoreCase))
{
throw new DataServiceException(304, "No Change, Thrown by DSPStreamProvider.");
}
else if (operationContext.RequestMethod.Equals("PUT", StringComparison.OrdinalIgnoreCase))
{
throw new DataServiceException(400, "If-None-Match HTTP header cannot be specified for PUT operations. Thrown by DSPStreamProvider.");
}
else if (operationContext.RequestMethod.Equals("DELETE", StringComparison.OrdinalIgnoreCase))
{
throw new DataServiceException(400, "If-None-Match HTTP header cannot be specified for DELETE operations. Thrown by DSPStreamProvider.");
}
else
{
throw new NotSupportedException();
}
}
}
}
internal static DSPServiceDefinition SetUpNamedStreamService()
{
DSPMetadata metadata = new DSPMetadata("NamedStreamIDSPContainer", "NamedStreamTest");
// entity with streams
ResourceType entityWithNamedStreams = metadata.AddEntityType("EntityWithNamedStreams", null, null, false);
metadata.AddKeyProperty(entityWithNamedStreams, "ID", typeof(int));
metadata.AddPrimitiveProperty(entityWithNamedStreams, "Name", typeof(string));
ResourceProperty streamInfo1 = new ResourceProperty("Stream1", ResourcePropertyKind.Stream, ResourceType.GetPrimitiveResourceType(typeof(Stream)));
entityWithNamedStreams.AddProperty(streamInfo1);
ResourceProperty streamInfo2 = new ResourceProperty("Stream2", ResourcePropertyKind.Stream, ResourceType.GetPrimitiveResourceType(typeof(Stream)));
entityWithNamedStreams.AddProperty(streamInfo2);
// entity1 with streams
ResourceType entityWithNamedStreams1 = metadata.AddEntityType("EntityWithNamedStreams1", null, null, false);
metadata.AddKeyProperty(entityWithNamedStreams1, "ID", typeof(int));
metadata.AddPrimitiveProperty(entityWithNamedStreams1, "Name", typeof(string));
ResourceProperty refStreamInfo1 = new ResourceProperty("RefStream1", ResourcePropertyKind.Stream, ResourceType.GetPrimitiveResourceType(typeof(Stream)));
entityWithNamedStreams1.AddProperty(refStreamInfo1);
// entity2 with streams
ResourceType entityWithNamedStreams2 = metadata.AddEntityType("EntityWithNamedStreams2", null, null, false);
metadata.AddKeyProperty(entityWithNamedStreams2, "ID", typeof(string));
metadata.AddPrimitiveProperty(entityWithNamedStreams2, "Name", typeof(string));
ResourceProperty collectionStreamInfo = new ResourceProperty("ColStream", ResourcePropertyKind.Stream, ResourceType.GetPrimitiveResourceType(typeof(Stream)));
entityWithNamedStreams2.AddProperty(collectionStreamInfo);
ResourceSet set1 = metadata.AddResourceSet("MySet1", entityWithNamedStreams);
ResourceSet set2 = metadata.AddResourceSet("MySet2", entityWithNamedStreams1);
ResourceSet set3 = metadata.AddResourceSet("MySet3", entityWithNamedStreams2);
// add navigation property to entityWithNamedStreams
metadata.AddResourceReferenceProperty(entityWithNamedStreams, "Ref", set2, entityWithNamedStreams1);
metadata.AddResourceSetReferenceProperty(entityWithNamedStreams, "Collection", set3, entityWithNamedStreams2);
metadata.AddResourceSetReferenceProperty(entityWithNamedStreams2, "Collection1", set2, entityWithNamedStreams1);
DSPServiceDefinition service = new DSPServiceDefinition();
service.Metadata = metadata;
service.MediaResourceStorage = new DSPMediaResourceStorage();
service.SupportMediaResource = true;
service.SupportNamedStream = true;
service.ForceVerboseErrors = true;
service.PageSizeCustomizer = (config, type) =>
{
config.SetEntitySetPageSize("MySet3", 1);
};
// populate data
DSPContext context = new DSPContext();
DSPResource entity1 = new DSPResource(entityWithNamedStreams);
{
context.GetResourceSetEntities("MySet1").Add(entity1);
entity1.SetValue("ID", 1);
entity1.SetValue("Name", "Foo");
DSPMediaResource namedStream1 = service.MediaResourceStorage.CreateMediaResource(entity1, streamInfo1);
namedStream1.ContentType = "image/jpeg";
byte[] data1 = new byte[] { 0, 1, 2, 3, 4 };
namedStream1.GetWriteStream().Write(data1, 0, data1.Length);
DSPMediaResource namedStream2 = service.MediaResourceStorage.CreateMediaResource(entity1, streamInfo2);
namedStream2.ContentType = "image/jpeg";
byte[] data2 = new byte[] { 0, 1, 2, 3, 4 };
namedStream2.GetWriteStream().Write(data2, 0, data2.Length);
}
DSPResource entity2 = new DSPResource(entityWithNamedStreams1);
{
context.GetResourceSetEntities("MySet2").Add(entity2);
entity2.SetValue("ID", 3);
entity2.SetValue("Name", "Bar");
DSPMediaResource refNamedStream1 = service.MediaResourceStorage.CreateMediaResource(entity2, refStreamInfo1);
refNamedStream1.ContentType = "image/jpeg";
byte[] data1 = new byte[] { 0, 1, 2, 3, 4 };
refNamedStream1.GetWriteStream().Write(data1, 0, data1.Length);
// set the navigation property
entity1.SetValue("Ref", entity2);
}
{
DSPResource entity3 = new DSPResource(entityWithNamedStreams2);
context.GetResourceSetEntities("MySet3").Add(entity3);
entity3.SetValue("ID", "ABCDE");
entity3.SetValue("Name", "Bar");
DSPMediaResource stream = service.MediaResourceStorage.CreateMediaResource(entity3, collectionStreamInfo);
stream.ContentType = "image/jpeg";
byte[] data1 = new byte[] { 0, 1, 2, 3, 4 };
stream.GetWriteStream().Write(data1, 0, data1.Length);
entity3.SetValue("Collection1", new List <DSPResource>()
{
entity2
});
DSPResource entity4 = new DSPResource(entityWithNamedStreams2);
context.GetResourceSetEntities("MySet3").Add(entity4);
entity4.SetValue("ID", "XYZ");
entity4.SetValue("Name", "Foo");
DSPMediaResource stream1 = service.MediaResourceStorage.CreateMediaResource(entity3, collectionStreamInfo);
stream1.ContentType = "image/jpeg";
stream1.GetWriteStream().Write(data1, 0, data1.Length);
entity4.SetValue("Collection1", new List <DSPResource>()
{
entity2
});
entity1.SetValue("Collection", new List <DSPResource>()
{
entity3, entity4
});
}
service.DataSource = context;
return(service);
}
