jellyfin/SocketHttpListener/Net/HttpResponseStream.Managed.cs

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using System;
using System.Collections.Generic;
using System.IO;
using System.Net;
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using System.Net.Sockets;
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using System.Runtime.ExceptionServices;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
using MediaBrowser.Model.IO;
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using MediaBrowser.Model.Logging;
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using MediaBrowser.Model.Net;
using MediaBrowser.Model.System;
namespace SocketHttpListener.Net
{
// Licensed to the .NET Foundation under one or more agreements.
// See the LICENSE file in the project root for more information.
//
// System.Net.ResponseStream
//
// Author:
// Gonzalo Paniagua Javier (gonzalo@novell.com)
//
// Copyright (c) 2005 Novell, Inc. (http://www.novell.com)
//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//
internal partial class HttpResponseStream : Stream
{
private HttpListenerResponse _response;
private bool _ignore_errors;
private bool _trailer_sent;
private Stream _stream;
private readonly IMemoryStreamFactory _memoryStreamFactory;
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private readonly Socket _socket;
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private readonly bool _supportsDirectSocketAccess;
private readonly IEnvironmentInfo _environment;
private readonly IFileSystem _fileSystem;
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private readonly ILogger _logger;
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internal HttpResponseStream(Stream stream, HttpListenerResponse response, bool ignore_errors, IMemoryStreamFactory memoryStreamFactory, Socket socket, bool supportsDirectSocketAccess, IEnvironmentInfo environment, IFileSystem fileSystem, ILogger logger)
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{
_response = response;
_ignore_errors = ignore_errors;
_memoryStreamFactory = memoryStreamFactory;
_socket = socket;
_supportsDirectSocketAccess = supportsDirectSocketAccess;
_environment = environment;
_fileSystem = fileSystem;
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_logger = logger;
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_stream = stream;
}
private void DisposeCore()
{
byte[] bytes = null;
MemoryStream ms = GetHeaders(true);
bool chunked = _response.SendChunked;
if (_stream.CanWrite)
{
try
{
if (ms != null)
{
long start = ms.Position;
if (chunked && !_trailer_sent)
{
bytes = GetChunkSizeBytes(0, true);
ms.Position = ms.Length;
ms.Write(bytes, 0, bytes.Length);
}
InternalWrite(ms.GetBuffer(), (int)start, (int)(ms.Length - start));
_trailer_sent = true;
}
else if (chunked && !_trailer_sent)
{
bytes = GetChunkSizeBytes(0, true);
InternalWrite(bytes, 0, bytes.Length);
_trailer_sent = true;
}
}
catch (HttpListenerException)
{
// Ignore error due to connection reset by peer
}
}
_response.Close();
}
internal async Task WriteWebSocketHandshakeHeadersAsync()
{
if (_closed)
throw new ObjectDisposedException(GetType().ToString());
if (_stream.CanWrite)
{
MemoryStream ms = GetHeaders(closing: false, isWebSocketHandshake: true);
bool chunked = _response.SendChunked;
long start = ms.Position;
if (chunked)
{
byte[] bytes = GetChunkSizeBytes(0, true);
ms.Position = ms.Length;
ms.Write(bytes, 0, bytes.Length);
}
await InternalWriteAsync(ms.GetBuffer(), (int)start, (int)(ms.Length - start)).ConfigureAwait(false);
await _stream.FlushAsync().ConfigureAwait(false);
}
}
private MemoryStream GetHeaders(bool closing, bool isWebSocketHandshake = false)
{
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//// SendHeaders works on shared headers
//lock (_response.headers_lock)
//{
// if (_response.HeadersSent)
// return null;
// var ms = _memoryStreamFactory.CreateNew();
// _response.SendHeaders(closing, ms);
// return ms;
//}
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// SendHeaders works on shared headers
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lock (_response._headersLock)
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{
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if (_response.SentHeaders)
{
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return null;
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}
MemoryStream ms = new MemoryStream();
_response.SendHeaders(closing, ms, isWebSocketHandshake);
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return ms;
}
}
private static byte[] s_crlf = new byte[] { 13, 10 };
private static byte[] GetChunkSizeBytes(int size, bool final)
{
string str = String.Format("{0:x}\r\n{1}", size, final ? "\r\n" : "");
return Encoding.ASCII.GetBytes(str);
}
internal void InternalWrite(byte[] buffer, int offset, int count)
{
if (_ignore_errors)
{
try
{
_stream.Write(buffer, offset, count);
}
catch { }
}
else
{
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_stream.Write(buffer, offset, count);
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}
}
internal Task InternalWriteAsync(byte[] buffer, int offset, int count) =>
_ignore_errors ? InternalWriteIgnoreErrorsAsync(buffer, offset, count) : _stream.WriteAsync(buffer, offset, count);
private async Task InternalWriteIgnoreErrorsAsync(byte[] buffer, int offset, int count)
{
try { await _stream.WriteAsync(buffer, offset, count).ConfigureAwait(false); }
catch { }
}
private void WriteCore(byte[] buffer, int offset, int size)
{
if (size == 0)
return;
byte[] bytes = null;
MemoryStream ms = GetHeaders(false);
bool chunked = _response.SendChunked;
if (ms != null)
{
long start = ms.Position; // After the possible preamble for the encoding
ms.Position = ms.Length;
if (chunked)
{
bytes = GetChunkSizeBytes(size, false);
ms.Write(bytes, 0, bytes.Length);
}
int new_count = Math.Min(size, 16384 - (int)ms.Position + (int)start);
ms.Write(buffer, offset, new_count);
size -= new_count;
offset += new_count;
InternalWrite(ms.GetBuffer(), (int)start, (int)(ms.Length - start));
ms.SetLength(0);
ms.Capacity = 0; // 'dispose' the buffer in ms.
}
else if (chunked)
{
bytes = GetChunkSizeBytes(size, false);
InternalWrite(bytes, 0, bytes.Length);
}
if (size > 0)
InternalWrite(buffer, offset, size);
if (chunked)
InternalWrite(s_crlf, 0, 2);
}
private IAsyncResult BeginWriteCore(byte[] buffer, int offset, int size, AsyncCallback cback, object state)
{
if (_closed)
{
HttpStreamAsyncResult ares = new HttpStreamAsyncResult(this);
ares._callback = cback;
ares._state = state;
ares.Complete();
return ares;
}
byte[] bytes = null;
MemoryStream ms = GetHeaders(false);
bool chunked = _response.SendChunked;
if (ms != null)
{
long start = ms.Position;
ms.Position = ms.Length;
if (chunked)
{
bytes = GetChunkSizeBytes(size, false);
ms.Write(bytes, 0, bytes.Length);
}
ms.Write(buffer, offset, size);
buffer = ms.GetBuffer();
offset = (int)start;
size = (int)(ms.Position - start);
}
else if (chunked)
{
bytes = GetChunkSizeBytes(size, false);
InternalWrite(bytes, 0, bytes.Length);
}
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return _stream.BeginWrite(buffer, offset, size, cback, state);
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}
private void EndWriteCore(IAsyncResult asyncResult)
{
if (_closed)
return;
if (_ignore_errors)
{
try
{
_stream.EndWrite(asyncResult);
if (_response.SendChunked)
_stream.Write(s_crlf, 0, 2);
}
catch { }
}
else
{
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_stream.EndWrite(asyncResult);
if (_response.SendChunked)
_stream.Write(s_crlf, 0, 2);
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}
}
public Task TransmitFile(string path, long offset, long count, FileShareMode fileShareMode, CancellationToken cancellationToken)
{
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//if (_supportsDirectSocketAccess && offset == 0 && count == 0 && !_response.SendChunked)
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//{
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// return TransmitFileOverSocket(path, offset, count, fileShareMode, cancellationToken);
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//}
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return TransmitFileManaged(path, offset, count, fileShareMode, cancellationToken);
}
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private readonly byte[] _emptyBuffer = new byte[] { };
private Task TransmitFileOverSocket(string path, long offset, long count, FileShareMode fileShareMode, CancellationToken cancellationToken)
{
var ms = GetHeaders(false);
byte[] preBuffer;
if (ms != null)
{
using (var msCopy = new MemoryStream())
{
ms.CopyTo(msCopy);
preBuffer = msCopy.ToArray();
}
}
else
{
return TransmitFileManaged(path, offset, count, fileShareMode, cancellationToken);
}
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_stream.Flush();
_logger.Info("Socket sending file {0}", path);
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var taskCompletion = new TaskCompletionSource<bool>();
Action<IAsyncResult> callback = callbackResult =>
{
try
{
_socket.EndSendFile(callbackResult);
taskCompletion.TrySetResult(true);
}
catch (Exception ex)
{
taskCompletion.TrySetException(ex);
}
};
var result = _socket.BeginSendFile(path, preBuffer, _emptyBuffer, TransmitFileOptions.UseDefaultWorkerThread, new AsyncCallback(callback), null);
if (result.CompletedSynchronously)
{
callback(result);
}
cancellationToken.Register(() => taskCompletion.TrySetCanceled());
return taskCompletion.Task;
}
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const int StreamCopyToBufferSize = 81920;
private async Task TransmitFileManaged(string path, long offset, long count, FileShareMode fileShareMode, CancellationToken cancellationToken)
{
var allowAsync = _environment.OperatingSystem != MediaBrowser.Model.System.OperatingSystem.Windows;
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//if (count <= 0)
//{
// allowAsync = true;
//}
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var fileOpenOptions = FileOpenOptions.SequentialScan;
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if (allowAsync)
{
fileOpenOptions |= FileOpenOptions.Asynchronous;
}
// use non-async filestream along with read due to https://github.com/dotnet/corefx/issues/6039
using (var fs = _fileSystem.GetFileStream(path, FileOpenMode.Open, FileAccessMode.Read, fileShareMode, fileOpenOptions))
{
if (offset > 0)
{
fs.Position = offset;
}
var targetStream = this;
if (count > 0)
{
if (allowAsync)
{
await CopyToInternalAsync(fs, targetStream, count, cancellationToken).ConfigureAwait(false);
}
else
{
await CopyToInternalAsyncWithSyncRead(fs, targetStream, count, cancellationToken).ConfigureAwait(false);
}
}
else
{
if (allowAsync)
{
await fs.CopyToAsync(targetStream, StreamCopyToBufferSize, cancellationToken).ConfigureAwait(false);
}
else
{
fs.CopyTo(targetStream, StreamCopyToBufferSize);
}
}
}
}
private static async Task CopyToInternalAsyncWithSyncRead(Stream source, Stream destination, long copyLength, CancellationToken cancellationToken)
{
var array = new byte[StreamCopyToBufferSize];
int bytesRead;
while ((bytesRead = source.Read(array, 0, array.Length)) != 0)
{
var bytesToWrite = Math.Min(bytesRead, copyLength);
if (bytesToWrite > 0)
{
await destination.WriteAsync(array, 0, Convert.ToInt32(bytesToWrite), cancellationToken).ConfigureAwait(false);
}
copyLength -= bytesToWrite;
if (copyLength <= 0)
{
break;
}
}
}
private static async Task CopyToInternalAsync(Stream source, Stream destination, long copyLength, CancellationToken cancellationToken)
{
var array = new byte[StreamCopyToBufferSize];
int bytesRead;
while ((bytesRead = await source.ReadAsync(array, 0, array.Length, cancellationToken).ConfigureAwait(false)) != 0)
{
var bytesToWrite = Math.Min(bytesRead, copyLength);
if (bytesToWrite > 0)
{
await destination.WriteAsync(array, 0, Convert.ToInt32(bytesToWrite), cancellationToken).ConfigureAwait(false);
}
copyLength -= bytesToWrite;
if (copyLength <= 0)
{
break;
}
}
}
}
}