[mod_python] Apache directory listing

On May 29, 2007, at 4:23 PM, Graham Dumpleton wrote:

> On 30/05/07, Aaron Gallagher <habnabit at gmail.com> wrote:
>> Also, I seem to actually be having bizarre problems with my
>> redirects. When I request /a/b/c/d/, my handler catches the bad URL
>> and executes this code:
>> req.internal_redirect('/?__404')
>> return apache.DONE
>>
>> What happens is I get a page that has a text/plain mime type with a
>> 200 response code that looks essentially like this (stripping out a
>> lot of HTML):
>> Page not found: /d/
>> Page not found: /c/d/
>> Page not found: /b/c/d/
>> Page not found: /a/b/c/d/
>>
>> I found that after the redirect, the handler (which is a
>> fixuphandler) doesn't recur, but return apache.DONE, and then another
>> handler is called. My only thought could be that this is intrinsic to
>> the fixuphandler, but that seems silly. Skipping the redirect and
>> just returning 404 seems to work, and it doesn't return four not
>> found pages.
>>
>> What do I need to do to fix this?
>
> This is probably the problem with autoindex I briefly mentioned. To do
> an index it actually does a sub request as far as the fixup handler
> phase for every item which it might list in the index to determine if
> it has access rights and should be listing it. If you have handlers
> for these phases it will trigger them for the subrequest as well which
> might cause issues. One can detect if such a handler is called in
> subrequest by looking whether req.prev or req.main (cant remember
> which), is not None.

I just tried this, and whenever I tried to access req.prev or  
req.main (even req.next), the request would be scrapped and a new one  
created, that would get to the same point before starting again. I  
would have thousands of lines of "Debug: preparing to redirect"  
before I would just have to cancel the page from loading.

> When I get a chance to at least get directory index to week as you
> indicate what you want, then we can start stepping through these
> others issues.
>
> Graham

Aaron Gallagher
<habnabit at gmail.com>