gzip, and deflate should only gzip/deflate in mvc

handle exceptions from the application better

CompressR.sln

@@ -20,6 +20,7 @@ EndProject
 Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Solution Items", "Solution Items", "{84E10868-C75C-4FDF-8AE1-465F1593A211}"
 	ProjectSection(SolutionItems) = preProject
 		appveyor.yml = appveyor.yml
+		gulpfile.js = gulpfile.js
 	EndProjectSection
 EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "CompressR.WebApiUnitTests", "src\CompressR.WebApiUnitTests\CompressR.WebApiUnitTests.csproj", "{61D97564-ACF6-4396-AB96-2D29CDCC3814}"

gulpfile.js

@@ -5,7 +5,7 @@ var download = require("gulp-download");
 var del = require('del');
 var assemblyInfo = require('gulp-dotnet-assembly-info');
 var xunit = xunit = require('gulp-xunit-runner');
-var version = '1.2.2';
+var version = '1.5.1';
 
 gulp.task('clean', ()=>{
     return del(['src/**/obj/', 'src/**/bin/Release', 'nuget.exe', 'nupkgs'])

src/CompressR.MVC/BaseCompressAttribute.cs

@@ -0,0 +1,20 @@
+using System;
+using System.Collections.Generic;
+using System.IO.Compression;
+using System.Text;
+
+namespace CompressR.MVC
+{
+    [AttributeUsage(AttributeTargets.Class | AttributeTargets.Method, AllowMultiple = false, Inherited = true)]
+    public abstract class BaseCompressAttribute : System.Web.Mvc.ActionFilterAttribute
+    {
+        protected bool RequireCompression { get; set; }
+
+        public CompressionLevel CompressionLevel { get; set; } = CompressionLevel.Optimal;
+
+        protected BaseCompressAttribute(bool requireCompression = false)
+        {
+            RequireCompression = requireCompression;
+        }
+    }
+}

src/CompressR.MVC/CompressAttribute.cs

@@ -7,18 +7,16 @@ using System.Web.Mvc;
 namespace CompressR.MVC
 {
     [AttributeUsage(AttributeTargets.Class | AttributeTargets.Method, AllowMultiple = false, Inherited = false)]
-    public sealed class CompressAttribute : System.Web.Mvc.ActionFilterAttribute
+    public sealed class CompressAttribute : BaseCompressAttribute
     {
-        private bool RequireCompression { get; set; }
-
         public CompressAttribute(bool requireCompression = false)
+            : base(requireCompression)
         {
-            RequireCompression = requireCompression;
         }
 
-        public override void OnActionExecuting(ActionExecutingContext filterContext)
+        public override void OnResultExecuted(ResultExecutedContext filterContext)
         {
-            CompressFactory.Compress(filterContext, RequireCompression);
+            CompressFactory.Compress(filterContext, RequireCompression, CompressionLevel);
         }
     }
 }

src/CompressR.MVC/CompressFactory.cs

@@ -1,21 +1,25 @@
-using CompressR.Exceptions;
-using System;
+using System;
 using System.Collections.Generic;
 using System.IO.Compression;
 using System.Linq;
 using System.Text;
+using CompressR.Exceptions;
 
 namespace CompressR.MVC
 {
     public static class CompressFactory
     {
-        public static void Compress(string compression, System.Web.Mvc.ActionExecutingContext filterContext, bool requireCompression)
+        public static void Compress(System.Web.Mvc.ResultExecutedContext filterContext, bool requireCompression, string compression, CompressionLevel compressLevel = CompressionLevel.Optimal)
         {
+            if(filterContext.Exception != null && !filterContext.ExceptionHandled)
+            {
+                return;
+            }
             var context = filterContext.RequestContext.HttpContext;
             var compressionAccepted = context.Request.Headers.Get(Constants.AcceptEncoding)?.Split(',').Trim().Any(a => string.Equals(a, compression, StringComparison.OrdinalIgnoreCase)) ?? false;
-            if (!compressionAccepted)
+            if(!compressionAccepted)
             {
-                if (requireCompression)
+                if(requireCompression)
                 {
                     throw new CompressRException("Compression required but client did not send accept header");
                 }
@@ -25,18 +29,20 @@ namespace CompressR.MVC
                 }
             }
 
-
-
-            HandleCompression(compression, filterContext);
+            HandleCompression(compression, filterContext, compressLevel);
         }
 
-        public static void Compress(System.Web.Mvc.ActionExecutingContext filterContext, bool requireCompression)
+        public static void Compress(System.Web.Mvc.ResultExecutedContext filterContext, bool requireCompression, CompressionLevel compressLevel = CompressionLevel.Optimal)
         {
+            if(filterContext.Exception != null && !filterContext.ExceptionHandled)
+            {
+                return;
+            }
             var context = filterContext.RequestContext.HttpContext;
             var compressionAlgorithm = context.Request.Headers.Get(Constants.AcceptEncoding)?.Split(',').Trim().Intersect(Constants.Compressors, StringComparer.OrdinalIgnoreCase)?.FirstOrDefault();
-            if (!string.IsNullOrWhiteSpace(compressionAlgorithm))
+            if(!string.IsNullOrWhiteSpace(compressionAlgorithm))
             {
-                HandleCompression(compressionAlgorithm, filterContext);
+                HandleCompression(compressionAlgorithm, filterContext, compressLevel);
             }
             else if(requireCompression)
             {
@@ -44,19 +50,24 @@ namespace CompressR.MVC
             }
         }
 
-        private static void HandleCompression(string compression, System.Web.Mvc.ActionExecutingContext filterContext)
+        private static void HandleCompression(string compression, System.Web.Mvc.ResultExecutedContext filterContext, CompressionLevel compressLevel = CompressionLevel.Optimal)
         {
             var context = filterContext.RequestContext.HttpContext;
-            switch (compression)
+            HandleCompression(compression, filterContext.RequestContext.HttpContext, compressLevel);
+        }
+
+        private static void HandleCompression(string compression, System.Web.HttpContextBase context, CompressionLevel compressLevel)
+        {
+            switch(compression)
             {
                 case Constants.Gzip:
-                    context.Response.Filter = new GZipStream(context.Response.Filter, CompressionMode.Compress);
+                    context.Response.Filter = new GZipStream(context.Response.Filter, compressLevel);
                     context.Response.AppendHeader(Constants.ContentEncoding, Constants.Gzip);
                     context.Response.Cache.VaryByHeaders[Constants.AcceptEncoding] = true;
                     break;
 
                 case Constants.Deflate:
-                    context.Response.Filter = new DeflateStream(context.Response.Filter, CompressionMode.Compress);
+                    context.Response.Filter = new DeflateStream(context.Response.Filter, compressLevel);
                     context.Response.AppendHeader(Constants.ContentEncoding, Constants.Deflate);
                     context.Response.Cache.VaryByHeaders[Constants.AcceptEncoding] = true;
                     break;

src/CompressR.MVC/CompressR.MVC.projitems

@@ -9,6 +9,7 @@
     <Import_RootNamespace>CompressR.MVC</Import_RootNamespace>
   </PropertyGroup>
   <ItemGroup>
+    <Compile Include="$(MSBuildThisFileDirectory)BaseCompressAttribute.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)CompressAttribute.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)CompressFactory.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Constants.cs" />

src/CompressR.MVC/Constants.cs

@@ -1,8 +1,4 @@
-using System;
-using System.Collections.Generic;
-using System.Text;
-
-namespace CompressR.MVC
+namespace CompressR.MVC
 {
     public struct Constants
     {

src/CompressR.MVC/DeflateAttribute.cs

@@ -1,17 +1,16 @@
 using System;
 using System.IO.Compression;
 using System.Linq;
+using System.Web.Mvc;
 
 namespace CompressR.MVC
 {
     [AttributeUsage(AttributeTargets.Class | AttributeTargets.Method, AllowMultiple = false, Inherited = false)]
-    public sealed class DeflateAttribute : System.Web.Mvc.ActionFilterAttribute
+    public sealed class DeflateAttribute : BaseCompressAttribute
     {
-        private bool RequireCompression { get; set; }
-
         public DeflateAttribute(bool requireCompression = false)
+            : base(requireCompression)
         {
-            RequireCompression = requireCompression;
         }
 
         /// <summary>
@@ -19,9 +18,10 @@ namespace CompressR.MVC
         /// an action method.
         /// </summary>
         /// <param name="filterContext"></param>
-        public override void OnActionExecuting(System.Web.Mvc.ActionExecutingContext filterContext)
+
+        public override void OnResultExecuted(ResultExecutedContext filterContext)
         {
-            CompressFactory.Compress(Constants.Deflate, filterContext, RequireCompression);
+            CompressFactory.Compress(filterContext, RequireCompression, Constants.Deflate, CompressionLevel);
         }
     }
 }

src/CompressR.MVC/Extensions.cs

@@ -1,6 +1,4 @@
-using System;
-using System.Collections.Generic;
-using System.Text;
+using System.Collections.Generic;
 
 namespace CompressR.MVC
 {
@@ -8,7 +6,7 @@ namespace CompressR.MVC
     {
         public static IEnumerable<string> Trim(this IEnumerable<string> arr)
         {
-            foreach (var item in arr)
+            foreach(var item in arr)
             {
                 yield return item.Trim();
             }

src/CompressR.MVC/GzipAttribute.cs

@@ -1,27 +1,20 @@
 using System;
 using System.IO.Compression;
 using System.Linq;
+using System.Web.Mvc;
 
 namespace CompressR.MVC
 {
-    [AttributeUsage(AttributeTargets.Class | AttributeTargets.Method, AllowMultiple = false, Inherited = false)]
-    public sealed class GzipAttribute : System.Web.Mvc.ActionFilterAttribute
+    public sealed class GzipAttribute : BaseCompressAttribute
     {
-        private bool RequireCompression { get; set; }
-
         public GzipAttribute(bool requireCompression = false)
+            : base(requireCompression)
         {
-            RequireCompression = requireCompression;
         }
 
-        /// <summary>
-        /// Override to compress the content that is generated by
-        /// an action method.
-        /// </summary>
-        /// <param name="filterContext"></param>
-        public override void OnActionExecuting(System.Web.Mvc.ActionExecutingContext filterContext)
+        public override void OnResultExecuted(ResultExecutedContext filterContext)
         {
-            CompressFactory.Compress(Constants.Gzip, filterContext, RequireCompression);
+            CompressFactory.Compress(filterContext, RequireCompression, Constants.Gzip, CompressionLevel);
         }
     }
 }

src/CompressR.MVC5/CompressR.MVC5.nuspec

@@ -14,7 +14,7 @@
     <copyright>Copyright 2016</copyright>
     <tags>Compression MVC</tags>
     <dependencies>
-      <dependency id="Microsoft.AspNet.Mvc" version="(5.0.0, 6.0.0]" />
+      <dependency id="Microsoft.AspNet.Mvc" version="[5.0.0, 6.0.0)" />
     </dependencies>
   </metadata>
 </package>

src/CompressR.MVCUnitTests/CompressR.MVCUnitTests.csproj

@@ -33,8 +33,45 @@
     <WarningLevel>4</WarningLevel>
   </PropertyGroup>
   <ItemGroup>
+    <Reference Include="Castle.Core, Version=3.3.0.0, Culture=neutral, PublicKeyToken=407dd0808d44fbdc, processorArchitecture=MSIL">
+      <HintPath>..\..\packages\Castle.Core.3.3.3\lib\net45\Castle.Core.dll</HintPath>
+      <Private>True</Private>
+    </Reference>
+    <Reference Include="Microsoft.Web.Infrastructure, Version=1.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL">
+      <HintPath>..\..\packages\Microsoft.Web.Infrastructure.1.0.0.0\lib\net40\Microsoft.Web.Infrastructure.dll</HintPath>
+      <Private>True</Private>
+    </Reference>
+    <Reference Include="Moq, Version=4.5.10.0, Culture=neutral, PublicKeyToken=69f491c39445e920, processorArchitecture=MSIL">
+      <HintPath>..\..\packages\Moq.4.5.10\lib\net45\Moq.dll</HintPath>
+      <Private>True</Private>
+    </Reference>
     <Reference Include="System" />
     <Reference Include="System.Core" />
+    <Reference Include="System.Web" />
+    <Reference Include="System.Web.Helpers, Version=3.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL">
+      <HintPath>..\..\packages\Microsoft.AspNet.WebPages.3.2.3\lib\net45\System.Web.Helpers.dll</HintPath>
+      <Private>True</Private>
+    </Reference>
+    <Reference Include="System.Web.Mvc, Version=5.2.3.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL">
+      <HintPath>..\..\packages\Microsoft.AspNet.Mvc.5.2.3\lib\net45\System.Web.Mvc.dll</HintPath>
+      <Private>True</Private>
+    </Reference>
+    <Reference Include="System.Web.Razor, Version=3.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL">
+      <HintPath>..\..\packages\Microsoft.AspNet.Razor.3.2.3\lib\net45\System.Web.Razor.dll</HintPath>
+      <Private>True</Private>
+    </Reference>
+    <Reference Include="System.Web.WebPages, Version=3.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL">
+      <HintPath>..\..\packages\Microsoft.AspNet.WebPages.3.2.3\lib\net45\System.Web.WebPages.dll</HintPath>
+      <Private>True</Private>
+    </Reference>
+    <Reference Include="System.Web.WebPages.Deployment, Version=3.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL">
+      <HintPath>..\..\packages\Microsoft.AspNet.WebPages.3.2.3\lib\net45\System.Web.WebPages.Deployment.dll</HintPath>
+      <Private>True</Private>
+    </Reference>
+    <Reference Include="System.Web.WebPages.Razor, Version=3.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL">
+      <HintPath>..\..\packages\Microsoft.AspNet.WebPages.3.2.3\lib\net45\System.Web.WebPages.Razor.dll</HintPath>
+      <Private>True</Private>
+    </Reference>
     <Reference Include="System.Xml.Linq" />
     <Reference Include="System.Data.DataSetExtensions" />
     <Reference Include="Microsoft.CSharp" />
@@ -60,6 +97,7 @@
   </ItemGroup>
   <ItemGroup>
     <Compile Include="Class1.cs" />
+    <Compile Include="CompressionFactoryTests.cs" />
     <Compile Include="Properties\AssemblyInfo.cs" />
   </ItemGroup>
   <ItemGroup>
@@ -70,6 +108,10 @@
       <Project>{256f0ecd-0310-4de9-8334-31a3d3867925}</Project>
       <Name>CompressR.MVC5</Name>
     </ProjectReference>
+    <ProjectReference Include="..\CompressR\CompressR.csproj">
+      <Project>{c94378c3-4aa8-4f49-8720-77d14b62f72e}</Project>
+      <Name>CompressR</Name>
+    </ProjectReference>
   </ItemGroup>
   <ItemGroup>
     <Service Include="{82A7F48D-3B50-4B1E-B82E-3ADA8210C358}" />

src/CompressR.MVCUnitTests/CompressionFactoryTests.cs

@@ -0,0 +1,189 @@
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.IO.Compression;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.Web;
+using System.Web.Mvc;
+using System.Web.Routing;
+using Moq;
+using Xunit;
+
+namespace CompressR.MVCUnitTests
+{
+    public class CompressionFactoryTests
+    {
+        [Fact]
+        public void ShouldThrowWhenRequired()
+        {
+            var request = new Mock<HttpRequestBase>();
+            request.Setup(a => a.Headers).Returns(new System.Collections.Specialized.NameValueCollection() { });
+            var httpContext = new Moq.Mock<HttpContextBase>();
+            httpContext.Setup(a => a.Request).Returns(request.Object);
+            Assert.Throws(typeof(CompressR.Exceptions.CompressRException), () =>
+            {
+                CompressR.MVC.CompressFactory.Compress(new System.Web.Mvc.ResultExecutedContext()
+                {
+                    HttpContext = httpContext.Object
+                }, true);
+            });
+        }
+
+        [Fact]
+        public void ShouldNotThrowButAlsoNotCompressIfFalse()
+        {
+            var request = new Mock<HttpRequestBase>();
+            request.Setup(a => a.Headers).Returns(new System.Collections.Specialized.NameValueCollection() { });
+            var httpContext = new Moq.Mock<HttpContextBase>();
+            httpContext.Setup(a => a.Request).Returns(request.Object);
+            var response = new Mock<HttpResponseBase>();
+            httpContext.Setup(a => a.Response).Returns(response.Object);
+            var contextObject = httpContext.Object;
+            CompressR.MVC.CompressFactory.Compress(new System.Web.Mvc.ResultExecutedContext()
+            {
+                HttpContext = contextObject
+            }, false);
+            Assert.Null(contextObject.Response.Filter);
+        }
+
+        [Fact]
+        public void ShouldGzipWhenRequested()
+        {
+            var request = new Mock<HttpRequestBase>();
+            request.Setup(a => a.Headers).Returns(new System.Collections.Specialized.NameValueCollection() { ["Accept-Encoding"] = "gzip" });
+            var requestContextBase = new Mock<HttpContextBase>();
+            requestContextBase.Setup(a => a.Request).Returns(request.Object);
+            var requestContext = new Mock<RequestContext>();
+            requestContext.Setup(a => a.HttpContext).Returns(requestContextBase.Object);
+            var cachePolicy = new Mock<HttpCachePolicyBase>();
+            cachePolicy.Setup(a => a.VaryByHeaders).Returns(new HttpCacheVaryByHeaders());
+            //var httpContext = new Moq.Mock<ActionExecutingContext>();
+            var response = new Mock<HttpResponseBase>();
+            response.Setup(a => a.Headers).Returns(new System.Collections.Specialized.NameValueCollection());
+            response.SetupProperty(a => a.Filter, new MemoryStream(Encoding.UTF8.GetBytes("awesome")) { });
+            response.Setup(a => a.Cache).Returns(cachePolicy.Object);
+            var responseContext = new Mock<HttpContextBase>();
+            responseContext.Setup(a => a.Response).Returns(response.Object);
+
+            requestContextBase.Setup(a => a.Response).Returns(response.Object);
+            var httpContext = new ResultExecutedContext()
+            {
+                RequestContext = new System.Web.Routing.RequestContext()
+                {
+                    HttpContext = requestContextBase.Object
+                }
+            };
+
+            //httpContext.Setup(a=>a.RequestContext.Filter).Returns(new MemoryStream(Encoding.UTF8.GetBytes("awesome")) { } );
+            //var response = new Mock<HttpResponseBase>();
+            //httpContext.Setup(a => a.Response).Returns(response.Object);
+            //var contextObject = httpContext;
+            CompressR.MVC.CompressFactory.Compress(httpContext, false);
+            Assert.IsType<GZipStream>(httpContext.RequestContext.HttpContext.Response.Filter);
+        }
+
+        [Fact]
+        public void ShouldNotGzipWhenExceptionNotHandled()
+        {
+            var request = new Mock<HttpRequestBase>();
+            request.Setup(a => a.Headers).Returns(new System.Collections.Specialized.NameValueCollection() { ["Accept-Encoding"] = "gzip" });
+            var requestContextBase = new Mock<HttpContextBase>();
+            requestContextBase.Setup(a => a.Request).Returns(request.Object);
+            var requestContext = new Mock<RequestContext>();
+            requestContext.Setup(a => a.HttpContext).Returns(requestContextBase.Object);
+            var cachePolicy = new Mock<HttpCachePolicyBase>();
+            cachePolicy.Setup(a => a.VaryByHeaders).Returns(new HttpCacheVaryByHeaders());
+            //var httpContext = new Moq.Mock<ActionExecutingContext>();
+            var response = new Mock<HttpResponseBase>();
+            response.Setup(a => a.Headers).Returns(new System.Collections.Specialized.NameValueCollection());
+            response.SetupProperty(a => a.Filter, new MemoryStream(Encoding.UTF8.GetBytes("awesome")) { });
+            response.Setup(a => a.Cache).Returns(cachePolicy.Object);
+            var responseContext = new Mock<HttpContextBase>();
+            responseContext.Setup(a => a.Response).Returns(response.Object);
+
+            requestContextBase.Setup(a => a.Response).Returns(response.Object);
+            var httpContext = new ResultExecutedContext()
+            {
+                RequestContext = new System.Web.Routing.RequestContext()
+                {
+                    HttpContext = requestContextBase.Object
+                },
+                Exception = new Exception(),
+                ExceptionHandled = false
+            };
+            CompressR.MVC.CompressFactory.Compress(httpContext, false);
+            Assert.IsNotType<GZipStream>(httpContext.RequestContext.HttpContext.Response.Filter);
+        }
+
+        [Fact]
+        public void ShouldGzipWhenExceptionHandled()
+        {
+            var request = new Mock<HttpRequestBase>();
+            request.Setup(a => a.Headers).Returns(new System.Collections.Specialized.NameValueCollection() { ["Accept-Encoding"] = "gzip" });
+            var requestContextBase = new Mock<HttpContextBase>();
+            requestContextBase.Setup(a => a.Request).Returns(request.Object);
+            var requestContext = new Mock<RequestContext>();
+            requestContext.Setup(a => a.HttpContext).Returns(requestContextBase.Object);
+            var cachePolicy = new Mock<HttpCachePolicyBase>();
+            cachePolicy.Setup(a => a.VaryByHeaders).Returns(new HttpCacheVaryByHeaders());
+            //var httpContext = new Moq.Mock<ActionExecutingContext>();
+            var response = new Mock<HttpResponseBase>();
+            response.Setup(a => a.Headers).Returns(new System.Collections.Specialized.NameValueCollection());
+            response.SetupProperty(a => a.Filter, new MemoryStream(Encoding.UTF8.GetBytes("awesome")) { });
+            response.Setup(a => a.Cache).Returns(cachePolicy.Object);
+            var responseContext = new Mock<HttpContextBase>();
+            responseContext.Setup(a => a.Response).Returns(response.Object);
+
+            requestContextBase.Setup(a => a.Response).Returns(response.Object);
+            var httpContext = new ResultExecutedContext()
+            {
+                RequestContext = new System.Web.Routing.RequestContext()
+                {
+                    HttpContext = requestContextBase.Object
+                },
+                Exception = new Exception(),
+                ExceptionHandled = true
+            };
+            CompressR.MVC.CompressFactory.Compress(httpContext, false);
+            Assert.IsType<GZipStream>(httpContext.RequestContext.HttpContext.Response.Filter);
+        }
+
+        [Fact]
+        public void ShouldDeflateWhenRequested()
+        {
+            var request = new Mock<HttpRequestBase>();
+            request.Setup(a => a.Headers).Returns(new System.Collections.Specialized.NameValueCollection() { ["Accept-Encoding"] = "deflate" });
+            var requestContextBase = new Mock<HttpContextBase>();
+            requestContextBase.Setup(a => a.Request).Returns(request.Object);
+            var requestContext = new Mock<RequestContext>();
+            requestContext.Setup(a => a.HttpContext).Returns(requestContextBase.Object);
+            var cachePolicy = new Mock<HttpCachePolicyBase>();
+            cachePolicy.Setup(a => a.VaryByHeaders).Returns(new HttpCacheVaryByHeaders());
+            //var httpContext = new Moq.Mock<ActionExecutingContext>();
+            var response = new Mock<HttpResponseBase>();
+            response.Setup(a => a.Headers).Returns(new System.Collections.Specialized.NameValueCollection());
+            response.SetupProperty(a => a.Filter, new MemoryStream(Encoding.UTF8.GetBytes("awesome")) { });
+            response.Setup(a => a.Cache).Returns(cachePolicy.Object);
+            var responseContext = new Mock<HttpContextBase>();
+            responseContext.Setup(a => a.Response).Returns(response.Object);
+
+            requestContextBase.Setup(a => a.Response).Returns(response.Object);
+            var httpContext = new ResultExecutedContext()
+            {
+                RequestContext = new System.Web.Routing.RequestContext()
+                {
+                    HttpContext = requestContextBase.Object
+                }
+            };
+
+            //httpContext.Setup(a=>a.RequestContext.Filter).Returns(new MemoryStream(Encoding.UTF8.GetBytes("awesome")) { } );
+            //var response = new Mock<HttpResponseBase>();
+            //httpContext.Setup(a => a.Response).Returns(response.Object);
+            //var contextObject = httpContext;
+            CompressR.MVC.CompressFactory.Compress(httpContext, false);
+            Assert.IsType<DeflateStream>(httpContext.RequestContext.HttpContext.Response.Filter);
+        }
+    }
+}

src/CompressR.MVCUnitTests/packages.config

@@ -1,5 +1,11 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
+  <package id="Castle.Core" version="3.3.3" targetFramework="net452" />
+  <package id="Microsoft.AspNet.Mvc" version="5.2.3" targetFramework="net452" />
+  <package id="Microsoft.AspNet.Razor" version="3.2.3" targetFramework="net452" />
+  <package id="Microsoft.AspNet.WebPages" version="3.2.3" targetFramework="net452" />
+  <package id="Microsoft.Web.Infrastructure" version="1.0.0.0" targetFramework="net452" />
+  <package id="Moq" version="4.5.10" targetFramework="net452" />
   <package id="xunit" version="2.1.0" targetFramework="net452" />
   <package id="xunit.abstractions" version="2.0.0" targetFramework="net452" />
   <package id="xunit.assert" version="2.1.0" targetFramework="net452" />

src/CompressR.Sample/Controllers/HomeController.cs

@@ -14,7 +14,27 @@ namespace CompressR.Sample.Controllers
         {
             ViewBag.Title = "Home Page";
 
-            return View();
+            return View("index");
+        }
+        public ActionResult NoZip()
+        {
+            ViewBag.Title = "Home Page";
+
+            return View("index");
+        }
+        [Gzip]
+        public ActionResult Gzip()
+        {
+            ViewBag.Title = "Home Page";
+
+            return View("index");
+        }
+        [Deflate]
+        public ActionResult Deflate()
+        {
+            ViewBag.Title = "Home Page";
+
+            return View("index");
         }
     }
 }

src/CompressR.Sample/Controllers/ValuesController.cs

@@ -1,11 +1,11 @@
-using CompressR.WebApi;
-using System;
+using System;
 using System.Collections.Generic;
 using System.Linq;
 using System.Net;
 using System.Net.Http;
 using System.Threading.Tasks;
 using System.Web.Http;
+using CompressR.WebApi;
 
 namespace CompressR.Sample.Controllers
 {
@@ -17,6 +17,7 @@ namespace CompressR.Sample.Controllers
         {
             return new string[] { "value1", "value2" };
         }
+        [Deflate]
 
         // GET api/values/5
         public string Get(int id)
@@ -24,7 +25,7 @@ namespace CompressR.Sample.Controllers
             return "value";
         }
 
-        [Compress]
+        [Gzip]
         [HttpGet, Route("TestJsonSerialization")]
         public async Task<IHttpActionResult> TestJsonSerialization()
         {
@@ -32,7 +33,6 @@ namespace CompressR.Sample.Controllers
             {
                 A = 1,
                 B = new string[] { "1", "A", "B" }
-
             });
         }
 
@@ -44,9 +44,7 @@ namespace CompressR.Sample.Controllers
             {
                 A = 1,
                 B = new string[] { "1", "A", "B" }
-
             });
         }
-
     }
 }

src/CompressR.Sample/Web.config

@@ -56,4 +56,5 @@
       <remove name="TRACEVerbHandler" />
       <add name="ExtensionlessUrlHandler-Integrated-4.0" path="*." verb="*" type="System.Web.Handlers.TransferRequestHandler" preCondition="integratedMode,runtimeVersionv4.0" />
     </handlers>
+  <urlCompression doDynamicCompression="false" dynamicCompressionBeforeCache="false" doStaticCompression="false"/>
   </system.webServer></configuration>

src/CompressR.WebApi/BaseCompressAttribute.cs

@@ -0,0 +1,55 @@
+using System;
+using System.Collections.Generic;
+using System.IO.Compression;
+using System.Linq;
+using System.Text;
+using System.Threading;
+using System.Threading.Tasks;
+using System.Web.Http.Filters;
+using CompressR.Exceptions;
+
+namespace CompressR.WebApi
+{
+    [AttributeUsage(AttributeTargets.Class | AttributeTargets.Method, AllowMultiple = false, Inherited = true)]
+    public abstract class BaseCompressAttribute : System.Web.Http.Filters.ActionFilterAttribute
+    {
+        protected bool RequireCompression { get; set; }
+        public CompressionLevel CompressionLevel { get; set; } = CompressionLevel.Optimal;
+
+        protected BaseCompressAttribute(bool requireCompression = false)
+        {
+            RequireCompression = requireCompression;
+        }
+
+        protected async Task CompressAction(HttpActionExecutedContext actionExecutedContext, params string[] compressors)
+        {
+            if(actionExecutedContext?.Exception != null)
+            {
+                return;
+            }
+            if(actionExecutedContext?.Response?.Content == null)
+            {
+                return;
+            }
+            var acceptedEncoding = actionExecutedContext
+                .Response
+                .RequestMessage
+                .Headers
+                .AcceptEncoding
+                .Select(a => a.Value)
+                .Intersect(compressors, StringComparer.OrdinalIgnoreCase)
+                .FirstOrDefault();
+
+            if(string.IsNullOrWhiteSpace(acceptedEncoding))
+            {
+                if(RequireCompression)
+                {
+                    throw new CompressRException("Compression required but client did not send accept header");
+                }
+                return;
+            }
+
+            actionExecutedContext.Response.Content = new CompressedContent(actionExecutedContext.Response.Content, acceptedEncoding, CompressionLevel);
+        }
+    }
+}

src/CompressR.WebApi/CompressAttribute.cs

@@ -1,62 +1,26 @@
-using CompressR.Exceptions;
-using System;
-using System.Collections.Generic;
-using System.IO.Compression;
-using System.Linq;
-using System.Net.Http;
-using System.Text;
-using System.Threading;
+using System.Threading;
 using System.Threading.Tasks;
-using System.Web.Http.Controllers;
 using System.Web.Http.Filters;
 
 namespace CompressR.WebApi
 {
-    [AttributeUsage(AttributeTargets.Class | AttributeTargets.Method, AllowMultiple = false, Inherited = false)]
-    public sealed class CompressAttribute : System.Web.Http.Filters.ActionFilterAttribute
+    public sealed class CompressAttribute : BaseCompressAttribute
     {
-        private bool RequireCompression { get; set; }
-
         public CompressAttribute(bool requireCompression = false)
-        {
-            RequireCompression = requireCompression;
-        }
+            : base(requireCompression) { }
 
         public override void OnActionExecuted(HttpActionExecutedContext actionExecutedContext)
         {
-            OnActionExecutedAsync(actionExecutedContext, CancellationToken.None).Wait();
-
+            base.CompressAction(actionExecutedContext, Constants.Compressors).Wait();
         }
 
-        public override async Task OnActionExecutedAsync(HttpActionExecutedContext actionExecutedContext, CancellationToken cancellationToken)
+        public override Task OnActionExecutedAsync(HttpActionExecutedContext actionExecutedContext, CancellationToken cancellationToken)
         {
-            if(actionExecutedContext.Response.Content == null)
+            if(cancellationToken.IsCancellationRequested)
             {
-                return;
+                return Task.FromResult(0);
             }
-            var acceptedEncoding = actionExecutedContext
-                .Response
-                .RequestMessage
-                .Headers
-                .AcceptEncoding
-                .Select(a => a.Value)
-                .Intersect(Constants.Compressors, StringComparer.OrdinalIgnoreCase)
-                .FirstOrDefault();
-
-            if (string.IsNullOrWhiteSpace(acceptedEncoding))
-            {
-                if (RequireCompression)
-                {
-                    throw new CompressRException("Compression required but client did not send accept header");
-                }
-                else
-                {
-                    return;
-                }
-
-            }
-
-            actionExecutedContext.Response.Content = new CompressedContent(actionExecutedContext.Response.Content, acceptedEncoding);
+            return base.CompressAction(actionExecutedContext, Constants.Compressors);
         }
     }
 }

src/CompressR.WebApi/CompressR.WebApi.csproj

@@ -53,6 +53,7 @@
     <Reference Include="System.Xml" />
   </ItemGroup>
   <ItemGroup>
+    <Compile Include="BaseCompressAttribute.cs" />
     <Compile Include="CompressedContent.cs" />
     <Compile Include="Constants.cs" />
     <Compile Include="DeflateAttribute.cs" />

src/CompressR.WebApi/CompressedContent.cs

@@ -9,12 +9,13 @@ namespace CompressR.WebApi
 {
     public class CompressedContent : HttpContent
     {
+        private readonly CompressionLevel compressionLevel;
         private readonly string _encodingType;
         private readonly HttpContent _originalContent;
 
-        public CompressedContent(HttpContent content, string encodingType = "gzip")
+        public CompressedContent(HttpContent content, string encodingType = "gzip", CompressionLevel compressionLevel = CompressionLevel.Optimal)
         {
-            if (content == null)
+            if(content == null)
             {
                 throw new ArgumentNullException("content");
             }
@@ -22,11 +23,12 @@ namespace CompressR.WebApi
             _originalContent = content;
             _encodingType = encodingType.ToLowerInvariant();
 
-            foreach (var header in _originalContent.Headers)
+            foreach(var header in _originalContent.Headers)
             {
                 Headers.TryAddWithoutValidation(header.Key, header.Value);
             }
             Headers.ContentEncoding.Add(encodingType);
+            this.compressionLevel = compressionLevel;
         }
 
         protected override bool TryComputeLength(out long length)
@@ -38,14 +40,14 @@ namespace CompressR.WebApi
         protected override Task SerializeToStreamAsync(Stream stream, TransportContext context)
         {
             Stream compressedStream = null;
-            switch (_encodingType)
+            switch(_encodingType)
             {
                 case Constants.Gzip:
-                    compressedStream = new GZipStream(stream, CompressionMode.Compress, true);
+                    compressedStream = new GZipStream(stream, compressionLevel, true);
                     break;
 
                 case Constants.Deflate:
-                    compressedStream = new DeflateStream(stream, CompressionMode.Compress, true);
+                    compressedStream = new DeflateStream(stream, compressionLevel, true);
                     break;
 
                 default:
@@ -55,7 +57,7 @@ namespace CompressR.WebApi
 
             return _originalContent.CopyToAsync(compressedStream).ContinueWith(tsk =>
             {
-                if (compressedStream != null)
+                if(compressedStream != null)
                 {
                     compressedStream.Dispose();
                 }

src/CompressR.WebApi/DeflateAttribute.cs

@@ -1,5 +1,4 @@
-using CompressR.Exceptions;
-using System;
+using System;
 using System.Collections.Generic;
 using System.IO.Compression;
 using System.Linq;
@@ -9,49 +8,27 @@ using System.Threading;
 using System.Threading.Tasks;
 using System.Web.Http.Controllers;
 using System.Web.Http.Filters;
+using CompressR.Exceptions;
 
 namespace CompressR.WebApi
 {
-    [AttributeUsage(AttributeTargets.Class | AttributeTargets.Method, AllowMultiple = false, Inherited = false)]
-    public sealed class DeflateAttribute : System.Web.Http.Filters.ActionFilterAttribute
+    public sealed class DeflateAttribute : BaseCompressAttribute
     {
-        private bool RequireCompression { get; set; }
-
         public DeflateAttribute(bool requireCompression = false)
-        {
-            RequireCompression = requireCompression;
-        }
+            : base(requireCompression) { }
 
         public override void OnActionExecuted(HttpActionExecutedContext actionExecutedContext)
         {
-            OnActionExecutedAsync(actionExecutedContext, CancellationToken.None).Wait();
+            base.CompressAction(actionExecutedContext, Constants.Deflate).Wait();
         }
 
-        public override async Task OnActionExecutedAsync(HttpActionExecutedContext actionExecutedContext, CancellationToken cancellationToken)
+        public override Task OnActionExecutedAsync(HttpActionExecutedContext actionExecutedContext, CancellationToken cancellationToken)
         {
-            if(actionExecutedContext.Response.Content == null)
+            if(cancellationToken.IsCancellationRequested)
             {
-                return;
+                return Task.FromResult(0);
             }
-            var acceptedEncoding = actionExecutedContext
-            .Response
-            .RequestMessage
-            .Headers
-            .AcceptEncoding
-            .Select(a => a.Value)
-            .Any(a => a.Equals(Constants.Deflate, StringComparison.OrdinalIgnoreCase));
-
-            if (!acceptedEncoding && RequireCompression)
-            {
-                throw new CompressRException("Compression required but client did not send accept header");
-            }
-
-            if (!acceptedEncoding)
-            {
-                return;
-            }
-
-            actionExecutedContext.Response.Content = new CompressedContent(actionExecutedContext.Response.Content, Constants.Deflate);
+            return base.CompressAction(actionExecutedContext, Constants.Deflate);
         }
     }
 }

src/CompressR.WebApi/GzipAttribute.cs

@@ -1,5 +1,4 @@
-using CompressR.Exceptions;
-using System;
+using System;
 using System.IO.Compression;
 using System.Linq;
 using System.Net.Http;
@@ -8,50 +7,27 @@ using System.Threading;
 using System.Threading.Tasks;
 using System.Web.Http.Controllers;
 using System.Web.Http.Filters;
+using CompressR.Exceptions;
 
 namespace CompressR.WebApi
 {
-    [AttributeUsage(AttributeTargets.Class | AttributeTargets.Method, AllowMultiple = false, Inherited = false)]
-    public sealed class GzipAttribute : System.Web.Http.Filters.ActionFilterAttribute
+    public sealed class GzipAttribute : BaseCompressAttribute
     {
-        private bool RequireCompression { get; set; }
-
         public GzipAttribute(bool requireCompression = false)
-        {
-            RequireCompression = requireCompression;
-        }
+            : base(requireCompression) { }
 
         public override void OnActionExecuted(HttpActionExecutedContext actionExecutedContext)
         {
-            OnActionExecutedAsync(actionExecutedContext, CancellationToken.None).Wait();
+            base.CompressAction(actionExecutedContext, Constants.Gzip).Wait();
         }
 
-        public override async Task OnActionExecutedAsync(HttpActionExecutedContext actionExecutedContext, CancellationToken cancellationToken)
+        public override Task OnActionExecutedAsync(HttpActionExecutedContext actionExecutedContext, CancellationToken cancellationToken)
         {
-            if(actionExecutedContext.Response.Content == null)
+            if(cancellationToken.IsCancellationRequested)
             {
-                return;
+                return Task.FromResult(0);
             }
-            var acceptedEncoding = actionExecutedContext
-            .Response
-            .RequestMessage
-            .Headers
-            .AcceptEncoding
-            .Select(a => a.Value)
-            .Any(a => a.Equals(Constants.Gzip, StringComparison.OrdinalIgnoreCase));
-
-
-            if (!acceptedEncoding && RequireCompression)
-            {
-                throw new CompressRException("Compression required but client did not send accept header");
-            }
-
-            if (!acceptedEncoding)
-            {
-                return;
-            }
-
-            actionExecutedContext.Response.Content = new CompressedContent(actionExecutedContext.Response.Content, Constants.Gzip);
+            return base.CompressAction(actionExecutedContext, Constants.Gzip);
         }
     }
 }