web api 压缩

 1 using System.Web.Http.Filters;
 2 using System;
 3 using System.Net.Http.Headers;
 4 using System.Text;
 5 using System.Collections.Generic;
 6 using System.Web.Http;
 7 using System.Web.Http.Controllers;
 8 using System.Linq.Expressions;
 9 using System.Linq;
10 using System.Reflection;
11 using System.Collections;
12 using System.Threading;
13 using System.Net.Http.Formatting;
14 using System.Net;
15 using System.Threading.Tasks;
16 using System.Runtime.Caching;
17 using System.IO;
18 using Ionic.Zip;
19 using System.Net.Http;
20 
21 
22 namespace Compress
23 {
24     public class DeflateCompressionAttribute : System.Web.Http.Filters.ActionFilterAttribute
25     {
26         public override void OnActionExecuted(HttpActionExecutedContext actContext)
27         {
28             var content = actContext.Response.Content;
29             var bytes = content == null ? null : content.ReadAsByteArrayAsync().Result;
30             var zlibbedContent = bytes == null ? new byte[0] :
31             CompressionHelper.DeflateByte(bytes);
32             actContext.Response.Content = new ByteArrayContent(zlibbedContent);
33             actContext.Response.Content.Headers.Remove("Content-Type");
34             actContext.Response.Content.Headers.Add("Content-encoding", "gzip");
35             actContext.Response.Content.Headers.Add("Content-Type", "application/json");
36             base.OnActionExecuted(actContext);
37         }
38     }
39 
40     public class CompressionHelper
41     {
42         public static byte[] DeflateByte(byte[] str)
43         {
44             if (str == null)
45             {
46                 return null;
47             }
48 
49             using (var output = new MemoryStream())
50             {
51                 using (
52                     var compressor = new Ionic.Zlib.GZipStream(
53                     output, Ionic.Zlib.CompressionMode.Compress,
54                     Ionic.Zlib.CompressionLevel.BestSpeed))
55                 {
56                     compressor.Write(str, 0, str.Length);
57                 }
58 
59                 return output.ToArray();
60             }
61         }
62     }
63 
64     // [DeflateCompressionAttribute]
65         //public ActionResult Index()
66         //{
67         //    return View();
68         //}
69 
70 
71 }