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Caching WCF javascript proxy on browser

, 4 Apr 2012 CPOL
WCF Javascript Proxies (Service.svc/js) are never cached. They get generated and downloaded on every page view thus increasing page download time and server CPU. Here's an HttpModule to cache WCF Javascript Proxy on browser and respond with HTTP 304, if unchanged.
WcfJavascriptProxyCaching.zip
WcfJavascriptProxyCaching
WcfJavascriptProxyCaching.suo
WcfService1
App_Data
bin
WcfService1.dll
WcfService1.pdb
Global.asax
obj
Debug
DesignTimeResolveAssemblyReferencesInput.cache
TempPE
WcfService1.dll
WcfService1.pdb
Properties
Service1.svc
WcfService1.csproj.user
<?xml version="1.0" encoding="utf-8"?>
<Project ToolsVersion="4.0" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
  <PropertyGroup>
    <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
    <Platform Condition=" '$(Platform)' == '' ">AnyCPU</Platform>
    <ProductVersion>
    </ProductVersion>
    <SchemaVersion>2.0</SchemaVersion>
    <ProjectGuid>{82030C51-136B-4B72-AAC0-6B568D10A2FD}</ProjectGuid>
    <ProjectTypeGuids>{349c5851-65df-11da-9384-00065b846f21};{fae04ec0-301f-11d3-bf4b-00c04f79efbc}</ProjectTypeGuids>
    <OutputType>Library</OutputType>
    <AppDesignerFolder>Properties</AppDesignerFolder>
    <RootNamespace>WcfService1</RootNamespace>
    <AssemblyName>WcfService1</AssemblyName>
    <TargetFrameworkVersion>v3.5</TargetFrameworkVersion>
    <UseIISExpress>true</UseIISExpress>
  </PropertyGroup>
  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
    <DebugSymbols>true</DebugSymbols>
    <DebugType>full</DebugType>
    <Optimize>false</Optimize>
    <OutputPath>bin\</OutputPath>
    <DefineConstants>DEBUG;TRACE</DefineConstants>
    <ErrorReport>prompt</ErrorReport>
    <WarningLevel>4</WarningLevel>
  </PropertyGroup>
  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
    <DebugType>pdbonly</DebugType>
    <Optimize>true</Optimize>
    <OutputPath>bin\</OutputPath>
    <DefineConstants>TRACE</DefineConstants>
    <ErrorReport>prompt</ErrorReport>
    <WarningLevel>4</WarningLevel>
  </PropertyGroup>
  <ItemGroup>
    <Reference Include="System" />
    <Reference Include="System.Configuration" />
    <Reference Include="System.Core" />
    <Reference Include="System.Data" />
    <Reference Include="System.Drawing" />
    <Reference Include="System.EnterpriseServices" />
    <Reference Include="System.Runtime.Serialization" />
    <Reference Include="System.ServiceModel" />
    <Reference Include="System.ServiceModel.Web" />
    <Reference Include="System.Web" />
    <Reference Include="System.Web.Extensions" />
    <Reference Include="System.Web.Mobile" />
    <Reference Include="System.Web.Services" />
    <Reference Include="System.Xml" />
    <Reference Include="System.Xml.Linq" />
  </ItemGroup>
  <ItemGroup>
    <Content Include="Default.aspx" />
    <Content Include="Global.asax" />
    <Content Include="Service1.svc" />
    <Content Include="Web.config" />
    <Content Include="Web.Debug.config">
      <DependentUpon>Web.config</DependentUpon>
    </Content>
    <Content Include="Web.Release.config">
      <DependentUpon>Web.config</DependentUpon>
    </Content>
  </ItemGroup>
  <ItemGroup>
    <Compile Include="Default.aspx.cs">
      <DependentUpon>Default.aspx</DependentUpon>
      <SubType>ASPXCodeBehind</SubType>
    </Compile>
    <Compile Include="Default.aspx.designer.cs">
      <DependentUpon>Default.aspx</DependentUpon>
    </Compile>
    <Compile Include="Global.asax.cs">
      <DependentUpon>Global.asax</DependentUpon>
    </Compile>
    <Compile Include="JavascriptProxyCacheModule.cs" />
    <Compile Include="Service1.svc.cs">
      <DependentUpon>Service1.svc</DependentUpon>
    </Compile>
    <Compile Include="IService1.cs" />
    <Compile Include="Properties\AssemblyInfo.cs" />
  </ItemGroup>
  <ItemGroup>
    <Folder Include="App_Data\" />
  </ItemGroup>
  <Import Project="$(MSBuildBinPath)\Microsoft.CSharp.targets" />
  <Import Project="$(MSBuildExtensionsPath32)\Microsoft\VisualStudio\v10.0\WebApplications\Microsoft.WebApplication.targets" />
  <ProjectExtensions>
    <VisualStudio>
      <FlavorProperties GUID="{349c5851-65df-11da-9384-00065b846f21}">
        <WebProjectProperties>
          <UseIIS>True</UseIIS>
          <AutoAssignPort>True</AutoAssignPort>
          <DevelopmentServerPort>62071</DevelopmentServerPort>
          <DevelopmentServerVPath>/</DevelopmentServerVPath>
          <IISUrl>http://localhost:60462/</IISUrl>
          <NTLMAuthentication>False</NTLMAuthentication>
          <UseCustomServer>False</UseCustomServer>
          <CustomServerUrl>
          </CustomServerUrl>
          <SaveServerSettingsInUserFile>False</SaveServerSettingsInUserFile>
          <EnableWcfTestClientForSVCDefaultValue>True</EnableWcfTestClientForSVCDefaultValue>
        </WebProjectProperties>
      </FlavorProperties>
    </VisualStudio>
  </ProjectExtensions>
  <!-- To modify your build process, add your task inside one of the targets below and uncomment it. 
       Other similar extension points exist, see Microsoft.Common.targets.
  <Target Name="BeforeBuild">
  </Target>
  <Target Name="AfterBuild">
  </Target>
  -->
</Project>

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This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

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About the Author

Omar Al Zabir
Architect BT, UK (ex British Telecom)
United Kingdom United Kingdom

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Web04 | 2.8.141022.2 | Last Updated 4 Apr 2012
Article Copyright 2012 by Omar Al Zabir
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