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// Licensed to the Apache Software Foundation(ASF) under one
// or more contributor license agreements.See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License. You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied. See the License for the
// specific language governing permissions and limitations
// under the License.
using System;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
using Microsoft.AspNetCore.Http;
using Microsoft.Extensions.Logging;
using Thrift.Processor;
using Thrift.Protocol;
using Thrift.Transport.Client;
namespace Thrift.Transport.Server
{
// ReSharper disable once InconsistentNaming
public class THttpServerTransport
{
protected const string ContentType = "application/x-thrift";
/* never used
private readonly ILogger _logger;
private readonly RequestDelegate _next;
*/
protected Encoding Encoding = Encoding.UTF8;
protected TProtocolFactory InputProtocolFactory;
protected TProtocolFactory OutputProtocolFactory;
protected TTransportFactory InputTransportFactory;
protected TTransportFactory OutputTransportFactory;
protected ITAsyncProcessor Processor;
protected TConfiguration Configuration;
public THttpServerTransport(
ITAsyncProcessor processor,
TConfiguration config,
RequestDelegate next = null,
ILoggerFactory loggerFactory = null)
: this(processor, config, new TBinaryProtocol.Factory(), null, next, loggerFactory)
{
}
public THttpServerTransport(
ITAsyncProcessor processor,
TConfiguration config,
TProtocolFactory protocolFactory,
TTransportFactory transFactory = null,
RequestDelegate next = null,
ILoggerFactory loggerFactory = null)
: this(processor, config, protocolFactory, protocolFactory, transFactory, transFactory, next, loggerFactory)
{
}
public THttpServerTransport(
ITAsyncProcessor processor,
TConfiguration config,
TProtocolFactory inputProtocolFactory,
TProtocolFactory outputProtocolFactory,
TTransportFactory inputTransFactory = null,
TTransportFactory outputTransFactory = null,
RequestDelegate next = null,
ILoggerFactory loggerFactory = null)
{
// loggerFactory == null is not illegal anymore
Processor = processor ?? throw new ArgumentNullException(nameof(processor));
Configuration = config; // may be null
InputProtocolFactory = inputProtocolFactory ?? throw new ArgumentNullException(nameof(inputProtocolFactory));
OutputProtocolFactory = outputProtocolFactory ?? throw new ArgumentNullException(nameof(outputProtocolFactory));
InputTransportFactory = inputTransFactory;
OutputTransportFactory = outputTransFactory;
// never used
_ = next;
_ = loggerFactory;
/* never used
_next = next;
_logger = (loggerFactory != null) ? loggerFactory.CreateLogger<THttpServerTransport>() : new NullLogger<THttpServerTransport>();
*/
}
public async Task Invoke(HttpContext context)
{
await ProcessRequestAsync(context, context.RequestAborted); //TODO: check for correct logic
}
public async Task ProcessRequestAsync(HttpContext context, CancellationToken cancellationToken)
{
var transport = new TStreamTransport(context.Request.Body, context.Response.Body, Configuration);
try
{
var intrans = (InputTransportFactory != null) ? InputTransportFactory.GetTransport(transport) : transport;
var outtrans = (OutputTransportFactory != null) ? OutputTransportFactory.GetTransport(transport) : transport;
var input = InputProtocolFactory.GetProtocol(intrans);
var output = OutputProtocolFactory.GetProtocol(outtrans);
context.Response.ContentType = ContentType;
while (await Processor.ProcessAsync(input, output, cancellationToken))
{
if (!context.Response.HasStarted) // oneway method called
await context.Response.Body.FlushAsync(cancellationToken);
}
}
catch (TTransportException)
{
if (!context.Response.HasStarted) // if something goes bust, let the client know
context.Response.StatusCode = 500; // internal server error
}
catch (TProtocolException)
{
if (!context.Response.HasStarted) // if something goes bust, let the client know
context.Response.StatusCode = 400; // bad request, e.g. required field missing
}
finally
{
transport.Close();
}
}
}
}
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