100 lines
2.8 KiB
C#
100 lines
2.8 KiB
C#
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// StreamContent.cs
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//
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// Authors:
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// Marek Safar <marek.safar@gmail.com>
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//
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// Copyright (C) 2011 Xamarin Inc (http://www.xamarin.com)
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//
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// Permission is hereby granted, free of charge, to any person obtaining
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// a copy of this software and associated documentation files (the
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// "Software"), to deal in the Software without restriction, including
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// without limitation the rights to use, copy, modify, merge, publish,
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// distribute, sublicense, and/or sell copies of the Software, and to
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// permit persons to whom the Software is furnished to do so, subject to
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// the following conditions:
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//
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// The above copyright notice and this permission notice shall be
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// included in all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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//
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using System.IO;
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using System.Threading;
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using System.Threading.Tasks;
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namespace System.Net.Http
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{
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public class StreamContent : HttpContent
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{
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readonly Stream content;
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readonly int bufferSize;
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readonly CancellationToken cancellationToken;
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public StreamContent (Stream content)
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: this (content, 16 * 1024)
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{
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}
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public StreamContent (Stream content, int bufferSize)
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{
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if (content == null)
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throw new ArgumentNullException ("content");
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if (bufferSize <= 0)
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throw new ArgumentOutOfRangeException ("bufferSize");
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this.content = content;
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this.bufferSize = bufferSize;
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}
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//
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// Workarounds for poor .NET API
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// Instead of having SerializeToStreamAsync with CancellationToken as public API. Only LoadIntoBufferAsync
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// called internally from the send worker can be cancelled and user cannot see/do it
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//
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internal StreamContent (Stream content, CancellationToken cancellationToken)
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: this (content)
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{
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// We don't own the token so don't worry about disposing it
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this.cancellationToken = cancellationToken;
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}
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protected override Task<Stream> CreateContentReadStreamAsync ()
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{
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return Task.FromResult (content);
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}
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protected override void Dispose (bool disposing)
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{
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if (disposing) {
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content.Dispose ();
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}
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base.Dispose (disposing);
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}
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protected internal override Task SerializeToStreamAsync (Stream stream, TransportContext context)
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{
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return content.CopyToAsync (stream, bufferSize, cancellationToken);
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}
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protected internal override bool TryComputeLength (out long length)
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{
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if (!content.CanSeek) {
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length = 0;
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return false;
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}
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length = content.Length;
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return true;
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}
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}
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}
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