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My application has a custom HttpModule that we use for some advanced logging. All it does is add a couple of custom headers to the HTTP response.

The problem I'm having is that when this module is enabled, .CSS files are being returned with an HTTP header of Cache-Control: no-cache. When I turn off the module, I get what I'm expecting which is Cache-Control:max-age=2419200.

I have my cache enabled with:

<staticContent>
    <clientCache cacheControlMode="UseMaxAge" cacheControlMaxAge="28.00:00:00"/>
</staticContent>

I tried to comment out the adding of the custom headers in our HttpModule, but that didn't work.

Also, this is only causing problems for the .CSS files. .JS, .PNG, and .GIF for example are all working as I would expect. I can't seem to figure out why .CSS is special.

Not sure why just having that module is causing the cache header to work like that. Any thoughts?

I tried this on IIS7 and IIS7.5. (Actually it is running in Windows Azure but I don't think that makes a difference).

Edits: The web.config is very large. I don't want to put the whole thing here. Here is more it:

<system.webServer>
    <handlers>
        <add name="pngHandler" path="*.png" verb="*" type="CompanyXXX.Applications.Portal.PngHttpHandler,Portal.System" modules="ManagedPipelineHandler" scriptProcessor="" resourceType="Unspecified" requireAccess="Script" preCondition="" />
        <add name="gifHandler" path="*.gif" verb="*" type="CompanyXXX.Applications.Portal.GifHttpHandler,Portal.System" modules="ManagedPipelineHandler" scriptProcessor="" resourceType="Unspecified" requireAccess="Script" preCondition="" />
        <add name="ScriptResource" preCondition="integratedMode" verb="GET,HEAD" path="ScriptResource.axd" type="System.Web.Handlers.ScriptResourceHandler, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" />
    </handlers>
    <modules>
        <add name="CookieManagerModule" type="CompanyXXX.Web.CookieManagerModule, Framework.Web" preCondition="" />
        <add name="AuthenticationModule" type="CompanyXXX.Applications.Portal.AuthenticationModule,Portal.System" preCondition="" />
        <add name="ScriptModule" type="System.Web.Handlers.ScriptModule, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" preCondition=""/>
        <add name="LoggingModule" type="CompanyXXX.Applications.Portal.LoggingModule,Portal.System"/>
        <add name="RequestReduce" type="RequestReduce.Module.RequestReduceModule, RequestReduce" />
    </modules>
    <validation validateIntegratedModeConfiguration="false" />
    <urlCompression doDynamicCompression="true" doStaticCompression="true" dynamicCompressionBeforeCache="false"/>
    <httpCompression sendCacheHeaders="true">
        <scheme name="gzip" dll="%Windir%\system32\inetsrv\gzip.dll" />
    </httpCompression>
    <staticContent>
        <clientCache cacheControlMode="UseMaxAge" cacheControlMaxAge="28.00:00:00"/>
    </staticContent>
</system.webServer>

As for the code, I can't post it here. All I can say is that it only adds 3 headers to the response.

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1 回答 1

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我有一个类似的问题。

将应用程序池从 pipelineMode 更改为Classic，您可以在 Files 的 Response headers 中看到 Cache control max age 标签。

对于经典模式，您需要将处理程序保留在

      <system.Web><httpHandlers> <!--add here--></httpHandlers></system.Web>
于 2012-09-14T12:30:48.820 回答