[users@httpd] Re: mod_rewrite, L and F flags [RESOLVED]

[Stephen Wellington <we...@gmail.com>]

On Mon, Sep 1, 2008 at 1:59 PM, Stephen Wellington
<we...@gmail.com> wrote:
> On Mon, Sep 1, 2008 at 1:25 PM, Eric Covener <co...@gmail.com> wrote:
>> On Mon, Sep 1, 2008 at 8:01 AM, Stephen Wellington
>> <we...@gmail.com> wrote:
>>> Hi,
>>>
>>> Am having trouble with mod_rewrite and would appreciate a little help.
>>> I've tried searching Google and reading the manual but found little
>>> that helps!
>>>
>>> I am trying to achieve something like this:
>>>
>>> RewriteRule ^a.php$ b.php [L]
>>> RewriteRule ^b.php$ - [F]
>>>
>>> The intention is that requests to a.php will serve the contents of
>>> b.php, but if a user tries to go directly to b.php they are given a
>>> 403 error.  My understanding is that L flag stops further matching of
>>> rules. but this doesn't appear to work, neither does a 'solution' from
>>> Google of using the NS flag in the second rule.
>>
>> Your strings don't start with a slash, which means you're in
>> directory/location/htaccess context.
>>
>> In this context, after any rewrite occurs the entire process is
>> re-started with the new URL.  This makes 'L' work a little different
>> then in virtualhost context.
>>
>> "Remember, however, that if the RewriteRule generates an internal
>> redirect (which frequently occurs when rewriting in a per-directory
>> context), this will reinject the request and will cause processing to
>> be repeated starting from the first RewriteRule."
>>
>> Maybe you could set an environment variables [E=foo:bar] to remember
>> you've rewritten this request?
>>
>> --
>> Eric Covener
>> covener@gmail.com
>>
>
> Thank you for your help; I have taken your advice on the environment
> variables and used this:
>
> RewriteRule ^a.php$ b.php [E=foo:bar]
> RewriteCond %{ENV:foo} !="bar"
> RewriteRule ^b.php$ - [F]
>
> However requests to a.php are still returning a 403. Could you tell me
> if I'm missing the point with the way these variables work?
>
> Thank you
>

Resorted to moving the rules inside the <VirtualHost> container in the
end. Obviously not quite what I wanted as it means I now have to do a
'apache2ctl restart' whenever I change the config, but I guess that's
not the end of the world..

Setting the environment variable - the variable didn't seem to survive
(if that makes sense) after that first rule.  For instance this:

RewriteRule ^.*$ - [E=foo1:bar1]
RewriteRule ^a.php$ b.php [E=foo2:bar2]
RewriteRule ^b.php$ %{ENV:foo1}%{ENV:foo2}.php [R]

would redirect to bar1.php. So clearly the value of foo2 is being
forgotten somehow.

Thanks anyway
Steve

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