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Simplified usage, and added support for setting a minimum content siz…
…e for compressing.
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src/Microsoft.AspNet.WebApi.MessageHandlers.Compression.jmconfig
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| <?xml version="1.0" encoding="utf-8"?><Configuration xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema"><DontShowAgainInSolution>false</DontShowAgainInSolution></Configuration> |
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src/Microsoft.AspNet.WebApi.MessageHandlers.Compression/ClientCompressionHandler.cs
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| namespace Microsoft.AspNet.WebApi.MessageHandlers.Compression | ||
| { | ||
| using System; | ||
| using System.Collections.Generic; | ||
| using System.Linq; | ||
| using System.Net.Http; | ||
| using System.Threading; | ||
| using System.Threading.Tasks; | ||
|
|
||
| using Microsoft.AspNet.WebApi.MessageHandlers.Compression.Interfaces; | ||
| using Microsoft.AspNet.WebApi.MessageHandlers.Compression.Models; | ||
|
|
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| /// <summary> | ||
| /// Message handler for handling gzip/deflate requests/responses on a <see cref="HttpClient"/>. | ||
| /// </summary> | ||
| public class ClientCompressionHandler : DelegatingHandler | ||
| { | ||
| /// <summary> | ||
| /// The content size threshold before compressing. | ||
| /// </summary> | ||
| private readonly int contentSizeThreshold; | ||
|
|
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| /// <summary> | ||
| /// The HTTP content operations | ||
| /// </summary> | ||
| private readonly HttpContentOperations httpContentOperations; | ||
|
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| /// <summary> | ||
| /// Initializes a new instance of the <see cref="ClientCompressionHandler" /> class. | ||
| /// </summary> | ||
| /// <param name="compressors">The compressors.</param> | ||
| public ClientCompressionHandler(params ICompressor[] compressors) | ||
| { | ||
| this.Compressors = compressors; | ||
| this.httpContentOperations = new HttpContentOperations(); | ||
| } | ||
|
|
||
| /// <summary> | ||
| /// Initializes a new instance of the <see cref="ClientCompressionHandler" /> class. | ||
| /// </summary> | ||
| /// <param name="contentSizeThreshold">The content size threshold before compressing.</param> | ||
| /// <param name="compressors">The compressors.</param> | ||
| public ClientCompressionHandler(int contentSizeThreshold, params ICompressor[] compressors) | ||
| : this(compressors) | ||
| { | ||
| this.contentSizeThreshold = contentSizeThreshold; | ||
| } | ||
|
|
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| /// <summary> | ||
| /// Initializes a new instance of the <see cref="ClientCompressionHandler" /> class. | ||
| /// </summary> | ||
| /// <param name="innerHandler">The inner handler.</param> | ||
| /// <param name="compressors">The compressors.</param> | ||
| public ClientCompressionHandler(HttpMessageHandler innerHandler, params ICompressor[] compressors) | ||
| : this(compressors) | ||
| { | ||
| this.InnerHandler = innerHandler; | ||
| } | ||
|
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| /// <summary> | ||
| /// Initializes a new instance of the <see cref="ClientCompressionHandler" /> class. | ||
| /// </summary> | ||
| /// <param name="innerHandler">The inner handler.</param> | ||
| /// <param name="contentSizeThreshold">The content size threshold before compressing.</param> | ||
| /// <param name="compressors">The compressors.</param> | ||
| public ClientCompressionHandler(HttpMessageHandler innerHandler, int contentSizeThreshold, params ICompressor[] compressors) | ||
| : this(contentSizeThreshold, compressors) | ||
| { | ||
| this.InnerHandler = innerHandler; | ||
| } | ||
|
|
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| /// <summary> | ||
| /// Gets the compressors. | ||
| /// </summary> | ||
| /// <value>The compressors.</value> | ||
| public ICollection<ICompressor> Compressors { get; private set; } | ||
|
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| /// <summary> | ||
| /// send as an asynchronous operation. | ||
| /// </summary> | ||
| /// <param name="request">The HTTP request message to send to the server.</param> | ||
| /// <param name="cancellationToken">A cancellation token to cancel operation.</param> | ||
| /// <returns>Returns <see cref="T:System.Threading.Tasks.Task`1" />. The task object representing the asynchronous operation.</returns> | ||
| protected override async Task<HttpResponseMessage> SendAsync(HttpRequestMessage request, CancellationToken cancellationToken) | ||
| { | ||
| // Compress uncompressed requests from the client to the server | ||
| if (request.Content != null && request.Headers.AcceptEncoding.Any()) | ||
| { | ||
| await this.CompressRequest(request); | ||
| } | ||
|
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| var response = await base.SendAsync(request, cancellationToken); | ||
|
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| // Decompress compressed responses to the client from the server | ||
| if (response.Content != null && response.Content.Headers.ContentEncoding.Any()) | ||
| { | ||
| await this.DecompressResponse(response); | ||
| } | ||
|
|
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| return response; | ||
| } | ||
|
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| /// <summary> | ||
| /// Compresses the content. | ||
| /// </summary> | ||
| /// <param name="request">The request.</param> | ||
| /// <returns>An async void.</returns> | ||
| private async Task CompressRequest(HttpRequestMessage request) | ||
| { | ||
| // As per RFC2616.14.3: | ||
| // Ignores encodings with quality == 0 | ||
| // If multiple content-codings are acceptable, then the acceptable content-coding with the highest non-zero qvalue is preferred. | ||
| var compressor = (from encoding in request.Headers.AcceptEncoding | ||
| let quality = encoding.Quality ?? 1.0 | ||
| where quality > 0 | ||
| join c in this.Compressors on encoding.Value.ToLowerInvariant() equals | ||
| c.EncodingType.ToLowerInvariant() | ||
| orderby quality descending | ||
| select c).FirstOrDefault(); | ||
|
|
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| if (compressor != null) | ||
| { | ||
| // Only compress response if size is larger than threshold (if set) | ||
| if (this.contentSizeThreshold == 0) | ||
| { | ||
| request.Content = new CompressedContent(request.Content, compressor); | ||
| } | ||
| else if (this.contentSizeThreshold > 0 && request.Content.Headers.ContentLength >= this.contentSizeThreshold) | ||
| { | ||
| request.Content = new CompressedContent(request.Content, compressor); | ||
| } | ||
| } | ||
| } | ||
|
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| /// <summary> | ||
| /// Decompresses the response. | ||
| /// </summary> | ||
| /// <param name="response">The response.</param> | ||
| /// <returns>An async void.</returns> | ||
| private async Task DecompressResponse(HttpResponseMessage response) | ||
| { | ||
| var encoding = response.Content.Headers.ContentEncoding.FirstOrDefault(); | ||
|
|
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| if (encoding != null) | ||
| { | ||
| var compressor = this.Compressors.FirstOrDefault(c => c.EncodingType.Equals(encoding, StringComparison.OrdinalIgnoreCase)); | ||
|
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| if (compressor != null) | ||
| { | ||
| response.Content = await this.httpContentOperations.DecompressContent(response.Content, compressor); | ||
| } | ||
| } | ||
| } | ||
| } | ||
| } |
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src/Microsoft.AspNet.WebApi.MessageHandlers.Compression/CompressionHandler.cs
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