Added output cache for static resources to reduce page flashes during loading.

Author: Jijie Chen

src/Papercut.Module.WebUI/Controllers/StaticContentController.cs

@@ -10,11 +10,13 @@ namespace Papercut.Module.WebUI.Controllers
     using System.Net.Http.Headers;
     using System.Reflection;
     using System.Web.Http;
-
+    using System.Web.Http.Controllers;
+    using WebApi.OutputCache.V2;
 
     public class StaticContentController: ApiController
     {
 
+        [CacheOutput(ClientTimeSpan=300, ServerTimeSpan=86400, CacheKeyGenerator=typeof(PapercutResourceKeyGenerator))]
         public HttpResponseMessage Get()
         {
             var resourceName = GetRequetedResourceName(Request.RequestUri);
@@ -88,5 +90,22 @@ static string GetMimeType(string filename)
             { "woff2", "application/font-woff2" },
         };
 
+        class PapercutResourceKeyGenerator : DefaultCacheKeyGenerator
+        {
+            static string AssemblyVersion;
+            static PapercutResourceKeyGenerator()
+            {
+                AssemblyVersion = Assembly.GetExecutingAssembly().GetName().Version.ToString();
+            }
+
+            public override string MakeCacheKey(HttpActionContext context, MediaTypeHeaderValue mediaType, bool excludeQueryString = false)
+            {
+                var requstUri = context.Request.RequestUri;
+                int hashCode = string.Concat("PapercutResource", AssemblyVersion, requstUri).GetHashCode();
+
+                return (hashCode ^ 0x10000).ToString("x2");
+            }
+        }
+
     }
 }

src/Papercut.Module.WebUI/Papercut.Module.WebUI.csproj

@@ -64,6 +64,7 @@
     <Reference Include="System.Net.Http.Formatting, Version=5.2.3.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL">
       <HintPath>..\..\packages\Microsoft.AspNet.WebApi.Client.5.2.3\lib\net45\System.Net.Http.Formatting.dll</HintPath>
     </Reference>
+    <Reference Include="System.Runtime.Caching" />
     <Reference Include="System.Security" />
     <Reference Include="System.ServiceModel" />
     <Reference Include="System.Web.Http, Version=5.2.3.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL">
@@ -73,6 +74,12 @@
       <HintPath>..\..\packages\Microsoft.AspNet.WebApi.SelfHost.5.2.3\lib\net45\System.Web.Http.SelfHost.dll</HintPath>
     </Reference>
     <Reference Include="System.Xml" />
+    <Reference Include="WebApi.OutputCache.Core, Version=1.0.0.0, Culture=neutral, processorArchitecture=MSIL">
+      <HintPath>..\..\packages\Strathweb.CacheOutput.WebApi2.0.10.0\lib\net45\WebApi.OutputCache.Core.dll</HintPath>
+    </Reference>
+    <Reference Include="WebApi.OutputCache.V2, Version=1.0.0.0, Culture=neutral, processorArchitecture=MSIL">
+      <HintPath>..\..\packages\Strathweb.CacheOutput.WebApi2.0.10.0\lib\net45\WebApi.OutputCache.V2.dll</HintPath>
+    </Reference>
   </ItemGroup>
   <ItemGroup>
     <Compile Include="Controllers\MessageController.cs" />

src/Papercut.Module.WebUI/Properties/AssemblyInfo.cs

@@ -32,5 +32,4 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("1.0.0.0")]
-[assembly: AssemblyFileVersion("1.0.0.0")]
+[assembly: AssemblyVersion("5.0.0.17")]

src/Papercut.Module.WebUI/packages.config

@@ -11,4 +11,5 @@
   <package id="MimeKit" version="1.16.2" targetFramework="net45" />
   <package id="Newtonsoft.Json" version="10.0.3" targetFramework="net45" />
   <package id="Serilog" version="2.5.0" targetFramework="net45" />
+  <package id="Strathweb.CacheOutput.WebApi2" version="0.10.0" targetFramework="net45" />
 </packages>