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a few more async optimizations

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LukePulverenti Luke Pulverenti luke pulverenti
2012-08-21 22:50:59 -04:00
parent 1c5f728ec2
commit fbf8cc833c
37 changed files with 249 additions and 311 deletions
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55
MediaBrowser.Common/Net/Handlers/StaticFileHandler.cs
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@@ -102,33 +102,30 @@ namespace MediaBrowser.Common.Net.Handlers
protected override Task<DateTime?> GetLastDateModified()
{
return Task.Run<DateTime?>(() =>
DateTime? value = null;
EnsureSourceStream();
if (SourceStream != null)
{
EnsureSourceStream();
value = File.GetLastWriteTime(Path);
}
if (SourceStream == null)
{
return null;
}
return File.GetLastWriteTime(Path);
});
return Task.FromResult<DateTime?>(value);
}
public override Task<string> GetContentType()
{
return Task.Run(() =>
{
return MimeTypes.GetMimeType(Path);
});
return Task.FromResult<string>(MimeTypes.GetMimeType(Path));
}
protected override Task PrepareResponse()
{
return Task.Run(() => { EnsureSourceStream(); });
EnsureSourceStream();
return Task.FromResult<object>(null);
}
protected async override Task WriteResponseToOutputStream(Stream stream)
protected override Task WriteResponseToOutputStream(Stream stream)
{
if (IsRangeRequest)
{
@@ -137,22 +134,22 @@ namespace MediaBrowser.Common.Net.Handlers
// If the requested range is "0-" and we know the total length, we can optimize by avoiding having to buffer the content into memory
if (requestedRange.Value == null && TotalContentLength != null)
{
await ServeCompleteRangeRequest(requestedRange, stream);
return ServeCompleteRangeRequest(requestedRange, stream);
}
else if (TotalContentLength.HasValue)
{
// This will have to buffer a portion of the content into memory
await ServePartialRangeRequestWithKnownTotalContentLength(requestedRange, stream);
return ServePartialRangeRequestWithKnownTotalContentLength(requestedRange, stream);
}
else
{
// This will have to buffer the entire content into memory
await ServePartialRangeRequestWithUnknownTotalContentLength(requestedRange, stream);
return ServePartialRangeRequestWithUnknownTotalContentLength(requestedRange, stream);
}
}
else
{
await SourceStream.CopyToAsync(stream);
return SourceStream.CopyToAsync(stream);
}
}
@@ -170,7 +167,7 @@ namespace MediaBrowser.Common.Net.Handlers
/// Handles a range request of "bytes=0-"
/// This will serve the complete content and add the content-range header
/// </summary>
private async Task ServeCompleteRangeRequest(KeyValuePair<long, long?> requestedRange, Stream responseStream)
private Task ServeCompleteRangeRequest(KeyValuePair<long, long?> requestedRange, Stream responseStream)
{
long totalContentLength = TotalContentLength.Value;
@@ -187,7 +184,7 @@ namespace MediaBrowser.Common.Net.Handlers
SourceStream.Position = rangeStart;
}
await SourceStream.CopyToAsync(responseStream);
return SourceStream.CopyToAsync(responseStream);
}
/// <summary>
@@ -196,7 +193,7 @@ namespace MediaBrowser.Common.Net.Handlers
private async Task ServePartialRangeRequestWithUnknownTotalContentLength(KeyValuePair<long, long?> requestedRange, Stream responseStream)
{
// Read the entire stream so that we can determine the length
byte[] bytes = await ReadBytes(SourceStream, 0, null);
byte[] bytes = await ReadBytes(SourceStream, 0, null).ConfigureAwait(false);
long totalContentLength = bytes.LongLength;
@@ -208,7 +205,7 @@ namespace MediaBrowser.Common.Net.Handlers
HttpListenerContext.Response.ContentLength64 = rangeLength;
HttpListenerContext.Response.Headers["Content-Range"] = string.Format("bytes {0}-{1}/{2}", rangeStart, rangeEnd, totalContentLength);
await responseStream.WriteAsync(bytes, Convert.ToInt32(rangeStart), Convert.ToInt32(rangeLength));
await responseStream.WriteAsync(bytes, Convert.ToInt32(rangeStart), Convert.ToInt32(rangeLength)).ConfigureAwait(false);
}
/// <summary>
@@ -222,14 +219,14 @@ namespace MediaBrowser.Common.Net.Handlers
long rangeLength = 1 + rangeEnd - rangeStart;
// Only read the bytes we need
byte[] bytes = await ReadBytes(SourceStream, Convert.ToInt32(rangeStart), Convert.ToInt32(rangeLength));
byte[] bytes = await ReadBytes(SourceStream, Convert.ToInt32(rangeStart), Convert.ToInt32(rangeLength)).ConfigureAwait(false);
// Content-Length is the length of what we're serving, not the original content
HttpListenerContext.Response.ContentLength64 = rangeLength;
HttpListenerContext.Response.Headers["Content-Range"] = string.Format("bytes {0}-{1}/{2}", rangeStart, rangeEnd, totalContentLength);
await responseStream.WriteAsync(bytes, 0, Convert.ToInt32(rangeLength));
await responseStream.WriteAsync(bytes, 0, Convert.ToInt32(rangeLength)).ConfigureAwait(false);
}
/// <summary>
@@ -252,9 +249,9 @@ namespace MediaBrowser.Common.Net.Handlers
using (MemoryStream ms = new MemoryStream())
{
int read;
while ((read = await input.ReadAsync(buffer, 0, buffer.Length)) > 0)
while ((read = await input.ReadAsync(buffer, 0, buffer.Length).ConfigureAwait(false)) > 0)
{
await ms.WriteAsync(buffer, 0, read);
await ms.WriteAsync(buffer, 0, read).ConfigureAwait(false);
}
return ms.ToArray();
}
@@ -265,9 +262,9 @@ namespace MediaBrowser.Common.Net.Handlers
using (MemoryStream ms = new MemoryStream())
{
int read = await input.ReadAsync(buffer, 0, buffer.Length);
int read = await input.ReadAsync(buffer, 0, buffer.Length).ConfigureAwait(false);
await ms.WriteAsync(buffer, 0, read);
await ms.WriteAsync(buffer, 0, read).ConfigureAwait(false);
return ms.ToArray();
}