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Added auto-detection of client-capabilities to determine whether to use gzip or deflate

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LukePulverenti Luke Pulverenti luke pulverenti 2012-08-09 08:59:54 -04:00
parent 174f6f7c51
commit 027d1724e5
2 changed files with 78 additions and 33 deletions
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80
MediaBrowser.Common/Net/Handlers/BaseHandler.cs
View file

@ -3,6 +3,7 @@ using System.Collections.Generic;
using System.Collections.Specialized; using System.Collections.Specialized;
using System.IO; using System.IO;
using System.IO.Compression; using System.IO.Compression;
using System.Net;
namespace MediaBrowser.Common.Net.Handlers namespace MediaBrowser.Common.Net.Handlers
{ {
@ -46,7 +47,7 @@ namespace MediaBrowser.Common.Net.Handlers
/// <summary> /// <summary>
/// The action to write the response to the output stream /// The action to write the response to the output stream
/// </summary> /// </summary>
public virtual Action<Stream> WriteStream public Action<Stream> WriteStream
{ {
get get
{ {
@ -125,11 +126,84 @@ namespace MediaBrowser.Common.Net.Handlers
} }
} }
private bool ClientSupportsCompression
{
get
{
string enc = RequestContext.Request.Headers["Accept-Encoding"] ?? string.Empty;
return enc.IndexOf("deflate", StringComparison.OrdinalIgnoreCase) != -1 || enc.IndexOf("gzip", StringComparison.OrdinalIgnoreCase) != -1;
}
}
private string CompressionMethod
{
get
{
string enc = RequestContext.Request.Headers["Accept-Encoding"] ?? string.Empty;
if (enc.IndexOf("deflate", StringComparison.OrdinalIgnoreCase) != -1)
{
return "deflate";
}
if (enc.IndexOf("gzip", StringComparison.OrdinalIgnoreCase) != -1)
{
return "gzip";
}
return null;
}
}
protected virtual void PrepareResponseBeforeWriteOutput(HttpListenerResponse response)
{
// Don't force this to true. HttpListener will default it to true if supported by the client.
if (!UseChunkedEncoding)
{
response.SendChunked = false;
}
if (ContentLength.HasValue)
{
response.ContentLength64 = ContentLength.Value;
}
if (CompressResponse && ClientSupportsCompression)
{
response.AddHeader("Content-Encoding", CompressionMethod);
}
TimeSpan cacheDuration = CacheDuration;
if (cacheDuration.Ticks > 0)
{
CacheResponse(response, cacheDuration, LastDateModified);
}
}
private void CacheResponse(HttpListenerResponse response, TimeSpan duration, DateTime? dateModified)
{
DateTime lastModified = dateModified ?? DateTime.Now;
response.Headers[HttpResponseHeader.CacheControl] = "public, max-age=" + Convert.ToInt32(duration.TotalSeconds);
response.Headers[HttpResponseHeader.Expires] = DateTime.Now.Add(duration).ToString("r");
response.Headers[HttpResponseHeader.LastModified] = lastModified.ToString("r");
}
private void WriteReponse(Stream stream) private void WriteReponse(Stream stream)
{ {
if (CompressResponse) PrepareResponseBeforeWriteOutput(RequestContext.Response);
if (CompressResponse && ClientSupportsCompression)
{ {
CompressedStream = new DeflateStream(stream, CompressionLevel.Fastest, false); if (CompressionMethod.Equals("deflate", StringComparison.OrdinalIgnoreCase))
{
CompressedStream = new DeflateStream(stream, CompressionLevel.Fastest, false);
}
else
{
CompressedStream = new GZipStream(stream, CompressionLevel.Fastest, false);
}
WriteResponseToOutputStream(CompressedStream); WriteResponseToOutputStream(CompressedStream);
} }

31
MediaBrowser.Common/Net/RequestContext.cs
View file

@ -1,8 +1,8 @@
using System; using System;
using System.Linq; using System.Linq;
using System.Net; using System.Net;
using MediaBrowser.Common.Net.Handlers;
using MediaBrowser.Common.Logging; using MediaBrowser.Common.Logging;
using MediaBrowser.Common.Net.Handlers;
namespace MediaBrowser.Common.Net namespace MediaBrowser.Common.Net
{ {
@ -62,26 +62,6 @@ namespace MediaBrowser.Common.Net
if (statusCode == 200 || statusCode == 206) if (statusCode == 200 || statusCode == 206)
{ {
// Don't force this to true. HttpListener will default it to true if supported by the client.
if (!handler.UseChunkedEncoding)
{
Response.SendChunked = false;
}
if (handler.ContentLength.HasValue)
{
Response.ContentLength64 = handler.ContentLength.Value;
}
if (handler.CompressResponse)
{
Response.AddHeader("Content-Encoding", "deflate");
}
if (cacheDuration.Ticks > 0)
{
CacheResponse(Response, cacheDuration, handler.LastDateModified);
}
handler.WriteStream(Response.OutputStream); handler.WriteStream(Response.OutputStream);
} }
else else
@ -91,15 +71,6 @@ namespace MediaBrowser.Common.Net
} }
} }
private void CacheResponse(HttpListenerResponse response, TimeSpan duration, DateTime? dateModified)
{
DateTime lastModified = dateModified ?? DateTime.Now;
response.Headers[HttpResponseHeader.CacheControl] = "public, max-age=" + Convert.ToInt32(duration.TotalSeconds);
response.Headers[HttpResponseHeader.Expires] = DateTime.Now.Add(duration).ToString("r");
response.Headers[HttpResponseHeader.LastModified] = lastModified.ToString("r");
}
private bool IsCacheValid(DateTime ifModifiedSince, TimeSpan cacheDuration, DateTime? dateModified) private bool IsCacheValid(DateTime ifModifiedSince, TimeSpan cacheDuration, DateTime? dateModified)
{ {
if (dateModified.HasValue) if (dateModified.HasValue)