Re: wildcard extension ASP.Net httphandler gives 401.3 ACL permission denied error on a directory

From: Dominick Baier [DevelopMentor] (dbaier_at_pleasepleasenospamdevelop.com)
Date: 10/07/05

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    Date: Thu, 06 Oct 2005 15:42:47 -0700

    Hello Ken,

    what have you set "verify if file exists" in the wildcard mapping?
    what the <authentication> mode in web.config?
    has the IUSR_ account read access to the directory in question?

    ---------------------------------------
    Dominick Baier - DevelopMentor
    http://www.leastprivilege.com

    > First a little background: I've written an httphandler to handle
    > wildcard extensions (i.e., I want to handle all URLs that come in
    > rather than just URLs w/ a specific file extension so I can give
    > friendly names to various dynamic web pages). To do this, I've
    > written an httphandler and put it in the web.config for my webapp
    > (stored in the wwwroot\webapp directory). It works great for the most
    > part; I get to handle any URLs below my webapp directory.
    >
    > The problem is, when I use a URL that references the directory, IIS
    > seems to be prompting for a username/password (it's set to use
    > anonymous and Windows authentication). If I turn off Windows
    > authentication, I just get a 401.3 error code.
    >
    > I used sysinternal's FileMon program and can see the aspnet process
    > trying to access \inetpub\wwwroot\webapp and that's why it's getting
    > the error. If I do a FileMon trace w/ wildcard extensions turned off,
    > it's the inetinfo process that accesses the \inetpub\wwwroot\webapp
    > directory instead of the aspnet process. I've tried adding the
    > ASPNET user to this directory w/ no luck. I've also tried logging in
    > as a real user w/ admin access when the prompt comes up w/ no luck.
    > I've tried adding a default home document in IIS (e.g., default.aspx)
    > so it should try loading that if it hits that directory, but it
    > doesn't do it. I put a breakpoint in my custom httphandler and it
    > never reaches it, so the problem is definitely happening in the aspnet
    > process; it also happens in Win2K/XP/2003, so it's not operating
    > system specific. If I access a URL that would map to any real
    > directory (e.g. localhost/webapp/subdir where the
    > \inetpub\wwwroot\webapp\subdir directory exists), it also prompts, so
    > this seems to only happen if the URL maps to a real directory.
    >
    > Any clues on what I should try next?
    > Or is this just a bug in ASP.Net? :-(
    > There's very little documentation on writing wildcard httphandlers...
    > thanks,
    >
    > ken
    > (remove .SPAMGUARD to reply to email)

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