blocks|key|579987|text|如果您使用的是IIS，我会说把压缩留给IIS，因为它支持7%2B压缩。只有turn+it+on。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|579988|另一方面，对于控制器来说，压缩太接近金属了。理想情况下，控制器应该工作在比字节和流更高的级别。|579989|entityMap|0|LINK|mutability|MUTABLE|url|http://www.codeproject.com/Articles/186233/Utilize-gzip-compression-in-IIS^0|Z|A|0|0|0^^$0|@$1|2|3|4|5|6|7|N|8|@]|9|@$A|O|B|P|1|Q]]|C|$]]|$1|D|3|E|5|6|7|R|8|@]|9|@]|C|$]]|$1|F|3|-4|5|6|7|S|8|@]|9|@]|C|$]]]|G|$H|$5|I|J|K|C|$L|M]]]]

If you are using IIS 7+, I would say leave the compression to IIS as it supports GZIP compression. Just <a href="http://www.codeproject.com/Articles/186233/Utilize-gzip-compression-in-IIS" rel="noreferrer">turn it on</a>.

On the other hand, compression is too close to the metal for the controller. Ideally controller should work in much higher level than bytes and streams.

blocks|key|364196|text|最简单的方法是直接在IIS级别执行enable+compression。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|364197|如果您希望在应用程序级别执行此操作，则可以编写自定义委托消息处理程序，如following+post中所示|364198|public+class+CompressHandler+:+DelegatingHandler
{
++++protected+override+Task<HttpResponseMessage>+SendAsync(HttpRequestMessage+request,+CancellationToken+cancellationToken)
++++{
++++++++return+base.SendAsync(request,+cancellationToken).ContinueWith<HttpResponseMessage>((responseToCompleteTask)+=>
++++++++{
++++++++++++HttpResponseMessage+response+=+responseToCompleteTask.Result;

++++++++++++if+(response.RequestMessage.Headers.AcceptEncoding+!=+null)
++++++++++++{
++++++++++++++++string+encodingType+=+response.RequestMessage.Headers.AcceptEncoding.First().Value;

++++++++++++++++response.Content+=+new+CompressedContent(response.Content,+encodingType);
++++++++++++}

++++++++++++return+response;
++++++++},
++++++++TaskContinuationOptions.OnlyOnRanToCompletion);
++++}
}

public+class+CompressedContent+:+HttpContent
{
++++private+HttpContent+originalContent;
++++private+string+encodingType;

++++public+CompressedContent(HttpContent+content,+string+encodingType)
++++{
++++++++if+(content+==+null)
++++++++{
++++++++++++throw+new+ArgumentNullException("content");
++++++++}

++++++++if+(encodingType+==+null)
++++++++{
++++++++++++throw+new+ArgumentNullException("encodingType");
++++++++}

++++++++originalContent+=+content;
++++++++this.encodingType+=+encodingType.ToLowerInvariant();

++++++++if+(this.encodingType+!=+"gzip"+&&+this.encodingType+!=+"deflate")
++++++++{
++++++++++++throw+new+InvalidOperationException(string.Format("Encoding+'{0}'+is+not+supported.+Only+supports+gzip+or+deflate+encoding.",+this.encodingType));
++++++++}

++++++++//+copy+the+headers+from+the+original+content
++++++++foreach+(KeyValuePair<string,+IEnumerable<string>>+header+in+originalContent.Headers)
++++++++{
++++++++++++this.Headers.AddWithoutValidation(header.Key,+header.Value);
++++++++}

++++++++this.Headers.ContentEncoding.Add(encodingType);
++++}

++++protected+override+bool+TryComputeLength(out+long+length)
++++{
++++++++length+=+-1;

++++++++return+false;
++++}

++++protected+override+Task+SerializeToStreamAsync(Stream+stream,+TransportContext+context)
++++{
++++++++Stream+compressedStream+=+null;

++++++++if+(encodingType+==+"gzip")
++++++++{
++++++++++++compressedStream+=+new+GZipStream(stream,+CompressionMode.Compress,+leaveOpen:+true);
++++++++}
++++++++else+if+(encodingType+==+"deflate")
++++++++{
++++++++++++compressedStream+=+new+DeflateStream(stream,+CompressionMode.Compress,+leaveOpen:+true);
++++++++}

++++++++return+originalContent.CopyToAsync(compressedStream).ContinueWith(tsk+=>
++++++++{
++++++++++++if+(compressedStream+!=+null)
++++++++++++{
++++++++++++++++compressedStream.Dispose();
++++++++++++}
++++++++});
++++}
}|code-block|syntax|javascript|364199|现在剩下的就是在Application_Start中注册处理程序了|style|CODE|364200|GlobalConfiguration.Configuration.MessageHandlers.Add(new+CompressHandler());|364201|entityMap|0|LINK|mutability|MUTABLE|url|http://www.iis.net/ConfigReference/system.webServer/httpCompression|1|http://forums.asp.net/t/1771770.aspx/1^0|H|I|0|0|10|E|1|0|0|8|H|0|0^^$0|@$1|2|3|4|5|6|7|10|8|@]|9|@$A|11|B|12|1|13]]|C|$]]|$1|D|3|E|5|6|7|14|8|@]|9|@$A|15|B|16|1|17]]|C|$]]|$1|F|3|G|5|H|7|18|8|@]|9|@]|C|$I|J]]|$1|K|3|L|5|6|7|19|8|@$A|1A|B|1B|M|N]]|9|@]|C|$]]|$1|O|3|P|5|H|7|1C|8|@]|9|@]|C|$I|J]]|$1|Q|3|-4|5|6|7|1D|8|@]|9|@]|C|$]]]|R|$S|$5|T|U|V|C|$W|X]]|Y|$5|T|U|V|C|$W|Z]]]]

The easiest is to <a href="http://www.iis.net/ConfigReference/system.webServer/httpCompression">enable compression</a> directly at IIS level. 

If you want to do it at the application level you could write a custom delegating message handler as shown in the <a href="http://forums.asp.net/t/1771770.aspx/1">following post</a>:

<pre><code>public class CompressHandler : DelegatingHandler
{
 protected override Task&lt;HttpResponseMessage&gt; SendAsync(HttpRequestMessage request, CancellationToken cancellationToken)
 {
 return base.SendAsync(request, cancellationToken).ContinueWith&lt;HttpResponseMessage&gt;((responseToCompleteTask) =&gt;
 {
 HttpResponseMessage response = responseToCompleteTask.Result;

 if (response.RequestMessage.Headers.AcceptEncoding != null)
 {
 string encodingType = response.RequestMessage.Headers.AcceptEncoding.First().Value;

 response.Content = new CompressedContent(response.Content, encodingType);
 }

 return response;
 },
 TaskContinuationOptions.OnlyOnRanToCompletion);
 }
}

public class CompressedContent : HttpContent
{
 private HttpContent originalContent;
 private string encodingType;

 public CompressedContent(HttpContent content, string encodingType)
 {
 if (content == null)
 {
 throw new ArgumentNullException("content");
 }

 if (encodingType == null)
 {
 throw new ArgumentNullException("encodingType");
 }

 originalContent = content;
 this.encodingType = encodingType.ToLowerInvariant();

 if (this.encodingType != "gzip" &amp;&amp; this.encodingType != "deflate")
 {
 throw new InvalidOperationException(string.Format("Encoding '{0}' is not supported. Only supports gzip or deflate encoding.", this.encodingType));
 }

 // copy the headers from the original content
 foreach (KeyValuePair&lt;string, IEnumerable&lt;string&gt;&gt; header in originalContent.Headers)
 {
 this.Headers.AddWithoutValidation(header.Key, header.Value);
 }

 this.Headers.ContentEncoding.Add(encodingType);
 }

 protected override bool TryComputeLength(out long length)
 {
 length = -1;

 return false;
 }

 protected override Task SerializeToStreamAsync(Stream stream, TransportContext context)
 {
 Stream compressedStream = null;

 if (encodingType == "gzip")
 {
 compressedStream = new GZipStream(stream, CompressionMode.Compress, leaveOpen: true);
 }
 else if (encodingType == "deflate")
 {
 compressedStream = new DeflateStream(stream, CompressionMode.Compress, leaveOpen: true);
 }

 return originalContent.CopyToAsync(compressedStream).ContinueWith(tsk =&gt;
 {
 if (compressedStream != null)
 {
 compressedStream.Dispose();
 }
 });
 }
}
</code></pre>

All that's left now is to register the handler in <code>Application_Start</code>:

<pre><code>GlobalConfiguration.Configuration.MessageHandlers.Add(new CompressHandler());
</code></pre>

I am currently working on migrating few of my MVC3 Controllers to MVC4 Api Controllers.
I have implemented Compression mechanism for MVC3 controller Get Method Responses by inherting <code>ActionFilterAttribute</code> and overriding <code>OnActionExecutiong</code> method. After some Research I found that I need to use <code>ActionFilterMethod</code> from <code>System.Web.HttpFilters</code>. It would be great if somebody can share piece of sample code to get me started for this compressing HTTP response using GZip

Compress HTTP GET Response

我目前正在将我的几个MVC3控制器迁移到MVC4 Api控制器上。我通过继承ActionFilterAttribute和重写OnActionExecutiong方法，实现了MVC3控制器获取方法响应的压缩机制。经过一番研究后，我发现我需要使用System.Web.HttpFilters中的ActionFilterMet...

问压缩HTTP GET响应
EN

社区

活动

资源

关于

腾讯云开发者

热门产品

热门推荐

更多推荐

问压缩HTTP GET响应EN

社区

活动

资源

关于

腾讯云开发者

热门产品

热门推荐

更多推荐

问压缩HTTP GET响应
EN