ASP.NET Handle PUT/DELETE verbs

Question

This applies to ASP.NET in general but also Web API.

How can we handle PUT/DELETE verbs without enabling RAMMFAR (RunAllManagedModulesForAllRequests).

I can't configure the handler mapping within IIS as my site is hosted on an Azure Web Role and any changes I make will not be persisted.

Ben Foster · Accepted Answer · 2012-06-22 14:42:54Z

19

@Alexander's answer put me on the right track. Had to add the following to get DELETE/PUT handled by ASP.NET:

  <system.webServer>
    <modules runAllManagedModulesForAllRequests="false"/>
    <handlers>
      <remove name="ExtensionlessUrl-Integrated-4.0" />
      <add name="ExtensionlessUrl-Integrated-4.0" 
           path="*." 
           verb="GET,HEAD,POST,DEBUG,DELETE,PUT" 
           type="System.Web.Handlers.TransferRequestHandler" 
           preCondition="integratedMode,runtimeVersionv4.0" />
    </handlers>
  </system.webServer>

answered Jun 22, 2012 at 14:42

Ben Foster

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3 Comments

Stijn Over a year ago

Please add this: "You can modify the IIS Express "applicationHost.config" in the %userprofile%\documents\IISExpress\config” folder."

G-Mac Over a year ago

I had everything shown above except the <modules> element. When I added that, it started working.

Typel Over a year ago

Is this version specific? In IIS 8.0 it causes a 500 Internal Server Error

Henrik Frystyk Nielsen · Accepted Answer · 2012-06-24 02:42:00Z

4

FWIW, we have modified the MVC/Web API project templates to allow all the common HTTP verbs using exactly the mechanism above. The change will be available in the next official drop (which will be RTM). That will it work by default.

answered Jun 24, 2012 at 2:42

Henrik Frystyk Nielsen

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1 Comment

Jason Over a year ago

I created a new MVC4 app in VS 2012 and copied the settings from the web.config.

Alexander Zeitler · Accepted Answer · 2014-07-10 22:08:40Z

2

Already tried to allow the verbs in System.WebServer section in web.config?

Something like this:

<System.WebServer>
     <handlers>
        <remove name="ExtensionlessUrlHandler-Integrated-4.0" />
        <add name="ExtensionlessUrlHandler-Integrated-4.0" 
        path="*." 
        verb="GET,HEAD,POST,DEBUG,PUT,DELETE" 
        modules="IsapiModule" 
        scriptProcessor="C:\Windows\Microsoft.NET\Framework64\v4.0.30319\aspnet_isapi.dll" 
        resourceType="Unspecified" 
        requireAccess="Script" 
        preCondition="classicMode,runtimeVersionv4.0,bitness64" 
        responseBufferLimit="0" />
    </handlers>
</System.WebServer>

edited Jul 10, 2014 at 22:08

answered Jun 22, 2012 at 13:48

Alexander Zeitler

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5 Comments

Ben Foster Over a year ago

Unfortunately this does not appear to work - I still get a 404.

Alexander Zeitler Over a year ago

Please add this one <remove name="WebDAV" />

Ben Foster Over a year ago

That didn't make any difference but your answer did prompt me to look in applicationHost.config. I've posted what ended up working for me.

Aliostad Over a year ago

I never had to do it. I found it in IIS express FAQ learn.iis.net/page.aspx/901/iis-express-faq

Josh Over a year ago

Don't see how this would ever work with <handlers></handler>. Typo?

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