/// <summary>
/// Customized write method (derived from ODataOutputFormatter) which translates odata context
/// and uses ODataMigration serializer provider
/// </summary>
/// <param name="context">OutputFormatterWriteContext</param>
/// <param name="selectedEncoding">Encoding</param>
/// <returns>Indication that writing is complete</returns>
public override Task WriteResponseBodyAsync(OutputFormatterWriteContext context, Encoding selectedEncoding)
{
Type type = context.ObjectType;
if (type == null)
{
throw new ArgumentNullException(nameof(type));
}
type = TypeHelper.GetTaskInnerTypeOrSelf(type);
HttpRequest request = context.HttpContext.Request;
if (request == null)
{
throw new InvalidOperationException("Write to stream async must have request");
}
try
{
HttpResponse response = context.HttpContext.Response;
Uri baseAddress = GetBaseAddressInternal(request);
MediaTypeHeaderValue contentType = GetContentType(response.Headers[HeaderNames.ContentType].FirstOrDefault());
Func <ODataSerializerContext> getODataSerializerContext = () =>
{
return(new ODataSerializerContext()
{
Request = request,
});
};
ODataSerializerProvider serializerProvider = new ODataMigrationSerializerProvider(customContainer);
WriteToStream(
type,
context.Object,
request.GetModel(),
baseAddress,
contentType,
request.GetUrlHelper(),
request,
request.Headers,
(services) => ODataMigrationMessageWrapper.Create(response.Body, response.Headers, null, services),
(edmType) => serializerProvider.GetEdmTypeSerializer(edmType),
(objectType) => serializerProvider.GetODataPayloadSerializer(objectType, request),
getODataSerializerContext);
return(Task.CompletedTask);
}
catch (Exception ex)
{
return(Task.FromException(ex));
}
}
/// <summary>
/// If the request has OData v3 headers in it, then process using V3 deserializer provider.
/// Otherwise, process as base class.
/// </summary>
/// <param name="context">InputFormatter context</param>
/// <param name="encoding">Encoding of request body</param>
/// <returns>InputFormatterResult</returns>
public override Task <InputFormatterResult> ReadRequestBodyAsync(InputFormatterContext context, Encoding encoding)
{
if (context == null)
{
throw new ArgumentNullException(nameof(context));
}
Type type = context.ModelType;
if (type == null)
{
throw new ArgumentException("Model type for this request body is null", nameof(type));
}
HttpRequest request = context.HttpContext.Request;
if (request == null)
{
throw new ArgumentNullException(nameof(request));
}
// If content length is 0 then return default value for this type
RequestHeaders contentHeaders = request.GetTypedHeaders();
object defaultValue = GetDefaultValueForType(type);
if (contentHeaders == null || contentHeaders.ContentLength == 0)
{
return(Task.FromResult(InputFormatterResult.Success(defaultValue)));
}
try
{
Func <ODataDeserializerContext> getODataDeserializerContext = () =>
{
return(new ODataDeserializerContext
{
Request = request,
});
};
Action <Exception> logErrorAction = (ex) =>
{
ILogger logger = context.HttpContext.RequestServices.GetService <ILogger>();
if (logger == null)
{
throw ex;
}
logger.LogError(ex, String.Empty);
};
List <IDisposable> toDispose = new List <IDisposable>();
IServiceProvider fakeProvider = (new ServiceCollection()).BuildServiceProvider();
ODataDeserializerProvider deserializerProvider = new ODataMigrationDeserializerProvider(fakeProvider);
object result = ReadFromStream(
type,
defaultValue,
request.GetModel(),
GetBaseAddressInternal(request),
request,
() => ODataMigrationMessageWrapper.Create(request.Body, request.Headers, request.GetODataContentIdMapping(), request.GetRequestContainer()),
(objectType) => deserializerProvider.GetEdmTypeDeserializer(objectType),
(objectType) => deserializerProvider.GetODataDeserializer(objectType, request),
getODataDeserializerContext,
(disposable) => toDispose.Add(disposable),
logErrorAction);
foreach (IDisposable obj in toDispose)
{
obj.Dispose();
}
return(Task.FromResult(InputFormatterResult.Success(result)));
}
catch (Exception ex)
{
context.ModelState.AddModelError(context.ModelName, ex, context.Metadata);
return(Task.FromResult(InputFormatterResult.Failure()));
}
}
/// <summary>
/// If the request has OData v3 headers in it, then process using V3 deserializer provider.
/// Otherwise, process as base class.
/// </summary>
/// <param name="context">InputFormatter context</param>
/// <param name="encoding">Encoding of request body</param>
/// <returns>InputFormatterResult</returns>
public override Task <InputFormatterResult> ReadRequestBodyAsync(InputFormatterContext context, Encoding encoding)
{
if (context == null)
{
throw new ArgumentNullException(nameof(context));
}
Type type = context.ModelType;
if (type == null)
{
throw new ArgumentException("Model type for this request body is null", nameof(type));
}
HttpRequest request = context.HttpContext.Request;
if (request == null)
{
throw new ArgumentNullException(nameof(request));
}
// Migration extension need AllowSynchronousIO to be true. (The value is false by default for .Net Core 3.0+, refer to https://github.com/dotnet/docs/issues/14835)
var syncIOFeature = context.HttpContext.Features.Get <IHttpBodyControlFeature>();
if (syncIOFeature != null)
{
syncIOFeature.AllowSynchronousIO = true;
}
// If content length is 0 then return default value for this type
RequestHeaders contentHeaders = request.GetTypedHeaders();
object defaultValue = GetDefaultValueForType(type);
if (contentHeaders == null || contentHeaders.ContentLength == 0)
{
return(Task.FromResult(InputFormatterResult.Success(defaultValue)));
}
try
{
Func <ODataDeserializerContext> getODataDeserializerContext = () =>
{
return(new ODataDeserializerContext
{
Request = request,
});
};
Action <Exception> logErrorAction = (ex) =>
{
ILogger logger = context.HttpContext.RequestServices.GetService <ILogger>();
if (logger == null)
{
throw ex;
}
logger.LogError(ex, String.Empty);
};
List <IDisposable> disposeList = new List <IDisposable>();
IServiceProvider fakeProvider = (new ServiceCollection()).BuildServiceProvider();
ODataDeserializerProvider deserializerProvider = new ODataMigrationDeserializerProvider(fakeProvider);
object result = ReadFromStream(
type,
defaultValue,
request.GetModel(),
GetBaseAddressInternal(request),
request,
// Use GetODataContentIdMapping() from the namespace Microsoft.AspNet.OData.Batch. Reference: https://github.com/OData/WebApi/pull/2012
() => ODataMigrationMessageWrapper.Create(request.Body, request.Headers, ODataBatchHttpRequestExtensions.GetODataContentIdMapping(request), request.GetRequestContainer()),
(objectType) => deserializerProvider.GetEdmTypeDeserializer(objectType),
(objectType) => deserializerProvider.GetODataDeserializer(objectType, request),
getODataDeserializerContext,
(disposable) => disposeList.Add(disposable),
logErrorAction);
foreach (IDisposable obj in disposeList)
{
obj.Dispose();
}
return(Task.FromResult(InputFormatterResult.Success(result)));
}
catch (Exception ex)
{
context.ModelState.AddModelError(context.ModelName, ex, context.Metadata);
return(Task.FromResult(InputFormatterResult.Failure()));
}
}