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From "Anders Norrbring" <li...@norrbring.se>
Subject SV: [users@httpd] Tips for redirects
Date Wed, 18 Mar 2009 07:56:28 GMT
> On Tue, Mar 17, 2009 at 12:44 PM, Anders Norrbring <lists@norrbring.se>
> wrote:
> >> On Mon, Mar 16, 2009 at 2:15 PM, Anders Norrbring
> <lists@norrbring.se>
> >> wrote:
> >> > Hi all.
> >> > I'm not really familiar with the redirects and regex's needed to
> use
> >> it, so I'd like to get some hints..
> >> >
> >> > I have a web server serving a number of websites, and while it's
> down
> >> I'd like to have some redirects set up on another machine.
> >> >
> >> > The setup I'm looking for is:
> >> >
> >> > 1. Redirect all image requests (gif, jpg and png) to a specific
> image
> >> URL.
> >> > 2. Redirect all other calls to a specific html page.
> >> >
> >> > Ideas are gratefully welcome.
> >> > Anders.
> >>
> >> Anders-
> >>
> >> For images:
> >> RewriteRule ^/.*\.(png|jpeg|jpg|gif|bmp)$ /address_of_your_image.png
> >> [L,NC,R=302]
> >>
> >> For everything else:
> >> RewriteRule ^/.*$ /down_time.html [L,R=302]
> >>
> >> That should do it, I think. You can add any other image extensions
> you
> >> might have to the list in the first one. You could probably do it by
> >> mime type, as well, but you'll probably need to do a sub-request and
> >> rewrite conditions.
> >>
> >> I actually use something very similar to the first one for battling
> >> hotlinking. I have a page on my site that describes it, and gives a
> >> detailed walk through of the regular expressions if you want to
> learn
> >> more: https://brianpmearns.com/bpm/shanghai
> >>
> >> Hope that helps.
> >>
> >> -Brian
> >>
> >> P.S., before someone else says something, the =302 probably isn't
> >> needed on the R flags, because I think Apache uses 302 as the
> default.
> >> But it might be a good idea anyway, just to make sure they don't end
> >> up as 301's, because that's not what you want (this is a temporary
> >> condition, right?)
> >
> >
> > Thanks!
> > Would I not need a 'RewriteCond' to make this work? Only the rules?
> 
> 
> RewriteCond applies a rewrite rule conditionally, so it shouldn't be
> needed if you want to apply it to all requests. That doesn't mean all
> requests will be rewritten of course, only the ones that match it. A
> RewriteCond lets you condition on things beyond just the URL. Without
> actually checking the doc, I /think/ you can use it to match against
> Mime-Type like I hinted at above. This would be useful if you want to
> match images that don't end in a normal image file extension, but it's
> going to place additional load on your server because it would need to
> go a subrequest for each request to see what the mime-type is. And
> actually in your case, since there's no server back there to actually
> check against, it won't do you any good.
> 
> So short answer, "No, you don't need a RewriteCond for this to work."
> 
> Cheers,
> -Brian


Wonderful!
It works just as I wanted to. Thank you very much Brian.

Anders.

 

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