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Copy pathHttpClient.cs
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293 lines (241 loc) · 8.71 KB
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/*
* Copyright (C) 2011 uhttpsharp project - http://github.com/raistlinthewiz/uhttpsharp
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
using System.Text;
using System.Net;
using System.Reflection;
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Net.Sockets;
using System.Threading.Tasks;
using uhttpsharp.Clients;
using uhttpsharp.Headers;
using uhttpsharp.RequestProviders;
using uhttpsharp.Logging;
namespace uhttpsharp
{
internal sealed class HttpClientHandler
{
private const string CrLf = "\r\n";
private static readonly byte[] CrLfBuffer = Encoding.UTF8.GetBytes(CrLf);
private static readonly ILog Logger = LogProvider.GetCurrentClassLogger();
private readonly IClient _client;
private readonly Func<IHttpContext, Task> _requestHandler;
private readonly IHttpRequestProvider _requestProvider;
private readonly EndPoint _remoteEndPoint;
private DateTime _lastOperationTime;
private Stream _stream;
public HttpClientHandler(IClient client, Func<IHttpContext, Task> requestHandler, IHttpRequestProvider requestProvider)
{
_remoteEndPoint = client.RemoteEndPoint;
_client = client;
_requestHandler = requestHandler;
_requestProvider = requestProvider;
Logger.InfoFormat("Got Client {0}", _remoteEndPoint);
Task.Factory.StartNew(Process);
UpdateLastOperationTime();
}
private async Task InitializeStream()
{
if (Client is ClientSslDecorator)
{
await ((ClientSslDecorator)Client).AuthenticateAsServer().ConfigureAwait(false);
}
_stream = new BufferedStream(_client.Stream, 8096);
}
private async void Process()
{
try
{
await InitializeStream();
while (_client.Connected)
{
// TODO : Configuration.
var limitedStream = new NotFlushingStream(new LimitedStream(_stream));
var request = await _requestProvider.Provide(new MyStreamReader(limitedStream)).ConfigureAwait(false);
if (request != null)
{
UpdateLastOperationTime();
var context = new HttpContext(request, _client.RemoteEndPoint);
Logger.InfoFormat("{1} : Got request {0}", request.Uri, _client.RemoteEndPoint);
await _requestHandler(context).ConfigureAwait(false);
if (context.Response != null)
{
var streamWriter = new StreamWriter(limitedStream) { AutoFlush = false };
streamWriter.NewLine = "\r\n";
await WriteResponse(context, streamWriter).ConfigureAwait(false);
await limitedStream.ExplicitFlushAsync().ConfigureAwait(false);
if (!request.Headers.KeepAliveConnection() || context.Response.CloseConnection)
{
_client.Close();
}
}
UpdateLastOperationTime();
}
else
{
_client.Close();
}
}
}
catch (Exception e)
{
// Hate people who make bad calls.
Logger.WarnException(string.Format("Error while serving : {0}", _remoteEndPoint), e);
_client.Close();
}
Logger.InfoFormat("Lost Client {0}", _remoteEndPoint);
}
private async Task WriteResponse(HttpContext context, StreamWriter writer)
{
IHttpResponse response = context.Response;
IHttpRequest request = context.Request;
// Headers
await writer.WriteLineAsync(string.Format("HTTP/1.1 {0} {1}",
(int)response.ResponseCode,
response.ResponseCode))
.ConfigureAwait(false);
foreach (var header in response.Headers)
{
await writer.WriteLineAsync(string.Format("{0}: {1}", header.Key, header.Value)).ConfigureAwait(false);
}
// Cookies
if (context.Cookies.Touched)
{
await writer.WriteAsync(context.Cookies.ToCookieData())
.ConfigureAwait(false);
}
// Empty Line
await writer.WriteLineAsync().ConfigureAwait(false);
writer.Flush();
// Body
await response.WriteBody(writer).ConfigureAwait(false);
await writer.FlushAsync().ConfigureAwait(false);
}
public IClient Client
{
get { return _client; }
}
public void ForceClose()
{
_client.Close();
}
public DateTime LastOperationTime
{
get
{
return _lastOperationTime;
}
}
private void UpdateLastOperationTime()
{
// _lastOperationTime = DateTime.Now;
}
}
internal class NotFlushingStream : Stream
{
private readonly Stream _child;
public NotFlushingStream(Stream child)
{
_child = child;
}
public void ExplicitFlush()
{
_child.Flush();
}
public Task ExplicitFlushAsync()
{
return _child.FlushAsync();
}
public override void Flush()
{
// _child.Flush();
}
public override long Seek(long offset, SeekOrigin origin)
{
return _child.Seek(offset, origin);
}
public override void SetLength(long value)
{
_child.SetLength(value);
}
public override int Read(byte[] buffer, int offset, int count)
{
return _child.Read(buffer, offset, count);
}
public override int ReadByte()
{
return _child.ReadByte();
}
public override void Write(byte[] buffer, int offset, int count)
{
_child.Write(buffer, offset, count);
}
public override void WriteByte(byte value)
{
_child.WriteByte(value);
}
public override bool CanRead
{
get { return _child.CanRead; }
}
public override bool CanSeek
{
get { return _child.CanSeek; }
}
public override bool CanWrite
{
get { return _child.CanWrite; }
}
public override long Length
{
get { return _child.Length; }
}
public override long Position
{
get { return _child.Position; }
set { _child.Position = value; }
}
public override int ReadTimeout
{
get { return _child.ReadTimeout; }
set { _child.ReadTimeout = value; }
}
public override int WriteTimeout
{
get { return _child.WriteTimeout; }
set { _child.WriteTimeout = value; }
}
}
public static class RequestHandlersAggregateExtensions
{
public static Func<IHttpContext, Task> Aggregate(this IList<IHttpRequestHandler> handlers)
{
return handlers.Aggregate(0);
}
private static Func<IHttpContext, Task> Aggregate(this IList<IHttpRequestHandler> handlers, int index)
{
if (index == handlers.Count)
{
return null;
}
var currentHandler = handlers[index];
var nextHandler = handlers.Aggregate(index + 1);
return context => currentHandler.Handle(context, () => nextHandler(context));
}
}
}
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