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From "Jens Schleusener" <>
Subject [users@httpd] Re: How to customize error responses (while using mod_rewrite)?
Date Mon, 15 May 2017 16:32:59 GMT
On Mon, 15 May 2017, Eric Covener wrote:

> On Mon, May 15, 2017 at 10:46 AM, Jens Schleusener
> <> wrote:
>> Unfortunately for the RewriteRule directive for e.g. a Rewrite flag R=4xx
>> instead of R=permanent isn't allowed (only 300-399, why?) so I had
>> considered the usage of the <If> directive but didn't find a working
>> solution.
> Other codes are allowed, but you can't do anything with the
> substitution in this case. The reason is that if you return any status
> code like this, it short-circuits the processing of the URL by the
> rest of the server, so nobody is around to convert the URL to a file
> and serve it.
> The manual says:
> Any valid HTTP response status code may be specified, using the syntax
> [R=305], with a 302 status code being used by default if none is
> specified. The status code specified need not necessarily be a
> redirect (3xx) status code. However, if a status code is outside the
> redirect range (300-399) then the substitution string is dropped
> entirely, and rewriting is stopped as if the L were used.

Thanks for the clarification. But I am a little bit slow-witted and don't 
understand what "substitution string is dropped entirely" means. I assume 
not only the further rewriting rules are skipped but unfortunately also 
the output of the defined substitution page (/https_tlsv10.html) in

  RewriteCond %{SSL:SSL_PROTOCOL} ^TLSv1$
  RewriteRule !^/https_tlsv10.html$ /https_tlsv10.html [R=412,L]

(the 412 is here just a placeholder for a really correct response status 
code) and the Apache httpd outputs "only" the standard page for an 412 

Ok, in that case one could use the ErrorDocument directive (it works for 
me principally) but how can one can achieve that that directive is not 
used globally but only specific for the above case?

The idea to set in the above RewriteRule additionally an environment 
variable for e.g. via a "E=tlsv10:1" flag and using

   <If "env('tlsv10') -eq 1">
     ErrorDocument 412 /https_tlsv10.html

seems not to work, the Apache httpd outputs the "412" standard error 



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