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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.IO.Pipes;
using System.Threading;
using System.Threading.Tasks;
namespace Thrift.Transport.Client
{
// ReSharper disable once InconsistentNaming
public class TNamedPipeTransport : TTransport
{
private NamedPipeClientStream PipeStream;
private int ConnectTimeout;
public TNamedPipeTransport(string pipe, int timeout = Timeout.Infinite)
: this(".", pipe, timeout)
{
}
public TNamedPipeTransport(string server, string pipe, int timeout = Timeout.Infinite)
{
var serverName = string.IsNullOrWhiteSpace(server) ? server : ".";
ConnectTimeout = (timeout > 0) ? timeout : Timeout.Infinite;
PipeStream = new NamedPipeClientStream(serverName, pipe, PipeDirection.InOut, PipeOptions.None);
}
public override bool IsOpen => PipeStream != null && PipeStream.IsConnected;
public override async Task OpenAsync(CancellationToken cancellationToken)
{
if (IsOpen)
{
throw new TTransportException(TTransportException.ExceptionType.AlreadyOpen);
}
await PipeStream.ConnectAsync( ConnectTimeout, cancellationToken);
}
public override void Close()
{
if (PipeStream != null)
{
PipeStream.Dispose();
PipeStream = null;
}
}
public override async ValueTask<int> ReadAsync(byte[] buffer, int offset, int length, CancellationToken cancellationToken)
{
if (PipeStream == null)
{
throw new TTransportException(TTransportException.ExceptionType.NotOpen);
}
return await PipeStream.ReadAsync(buffer, offset, length, cancellationToken);
}
public override async Task WriteAsync(byte[] buffer, int offset, int length, CancellationToken cancellationToken)
{
if (PipeStream == null)
{
throw new TTransportException(TTransportException.ExceptionType.NotOpen);
}
// if necessary, send the data in chunks
// there's a system limit around 0x10000 bytes that we hit otherwise
// MSDN: "Pipe write operations across a network are limited to 65,535 bytes per write. For more information regarding pipes, see the Remarks section."
var nBytes = Math.Min(15 * 4096, length); // 16 would exceed the limit
while (nBytes > 0)
{
await PipeStream.WriteAsync(buffer, offset, nBytes, cancellationToken);
offset += nBytes;
length -= nBytes;
nBytes = Math.Min(nBytes, length);
}
}
public override async Task FlushAsync(CancellationToken cancellationToken)
{
if (cancellationToken.IsCancellationRequested)
{
await Task.FromCanceled(cancellationToken);
}
}
protected override void Dispose(bool disposing)
{
PipeStream.Dispose();
}
}
}
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