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HttpResponse.cs
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144 lines (119 loc) · 5.2 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;
using System.Collections.Generic;
using System.IO;
using System.Runtime.Remoting.Messaging;
using System.Threading.Tasks;
namespace uhttpsharp
{
public interface IHttpResponse
{
Task WriteResponse(StreamWriter writer);
bool CloseConnection { get; }
}
public sealed class HttpResponse : IHttpResponse
{
private static readonly Dictionary<int, string> ResponseTexts =
new Dictionary<int, string>
{
{200, "OK"},
{302, "Found"},
{303, "See Other"},
{400, "BadRequest"},
{404, "Not Found"},
{502, "Server Busy"},
{500, "Internal Server Error"}
};
public string Protocol { get; private set; }
public string ContentType { get; private set; }
public HttpResponseCode Code { get; private set; }
private Stream ContentStream { get; set; }
private readonly Stream _headerStream = new MemoryStream();
private readonly bool _closeConnection;
private readonly List<KeyValuePair<string, string>> additionalHeaders;
public HttpResponse(HttpResponseCode code, string content, bool closeConnection)
: this(code, "text/html; charset=utf-8", StringToStream(content), closeConnection)
{
}
public HttpResponse(string contentType, Stream contentStream, bool closeConnection)
: this(HttpResponseCode.Ok, contentType, contentStream, closeConnection)
{
}
private HttpResponse(HttpResponseCode code, string contentType, Stream contentStream, bool keepAliveConnection)
{
Protocol = "HTTP/1.1";
ContentType = contentType;
Code = code;
ContentStream = contentStream;
_closeConnection = !keepAliveConnection;
additionalHeaders = new List<KeyValuePair<string, string>>();
}
public HttpResponse(HttpResponseCode code, byte[] contentStream, bool closeConnection)
: this (code, "text/html; charset=utf-8", new MemoryStream(contentStream), closeConnection)
{
}
public static HttpResponse CreateWithMessage(HttpResponseCode code, string message, bool keepAliveConnection, string body = "")
{
return new HttpResponse(
code,
string.Format(
"<html><head><title>{0}</title></head><body><h1>{0}</h1><hr>{1}</body></html>",
message, body), keepAliveConnection);
}
private static Stream StringToStream(string content)
{
var stream = new MemoryStream();
var writer = new StreamWriter(stream);
writer.Write(content);
writer.Flush();
return stream;
}
public async Task WriteResponse(StreamWriter writer)
{
WriteHeaders(new StreamWriter(_headerStream));
_headerStream.Position = 0;
await _headerStream.CopyToAsync(writer.BaseStream).ConfigureAwait(false);
ContentStream.Position = 0;
await ContentStream.CopyToAsync(writer.BaseStream).ConfigureAwait(false);
await writer.BaseStream.FlushAsync();
}
public void AddHeader(string name, string value)
{
additionalHeaders.Add(new KeyValuePair<string, string>(name, value));
}
public bool CloseConnection
{
get { return _closeConnection; }
}
private void WriteHeaders(StreamWriter tempWriter)
{
tempWriter.WriteLine("{0} {1} {2}", Protocol, (int)Code, ResponseTexts[(int)Code]);
tempWriter.WriteLine("Date: {0}", DateTime.UtcNow.ToString("R"));
tempWriter.WriteLine("Connection: {0}", _closeConnection ? "Close" : "Keep-Alive");
tempWriter.WriteLine("Content-Type: {0}", ContentType);
tempWriter.WriteLine("Content-Length: {0}", ContentStream.Length);
foreach (KeyValuePair<string, string> additionalHeader in additionalHeaders)
{
tempWriter.Write(additionalHeader.Key);
tempWriter.Write(": ");
tempWriter.WriteLine(additionalHeader.Value);
}
tempWriter.WriteLine();
tempWriter.Flush();
}
}
}