Clever Geek Handbook

Madness: Breaking IF clause LOCATION

With nginx.conf

including the following

     location /beta/ {
        proxy_pass http://otherhost/;
      }

then both of the following search processes work:

  • curl -H 'User-Agent: Mozilla' http://localhost/beta/admin.html

  • curl -H 'User-Agent: iPhone' http://localhost/beta/admin.html

They both extract http://otherhost/admin.html

When I change nginx.conf to read:

     location /beta/ {
        if ($http_user_agent ~ iPhone ) {
        }
        proxy_pass http://otherhost/;
      }

Then it curl -H 'User-Agent: Mozilla' http://localhost/beta/admin.html

keeps working but curl -H 'User-Agent: iPhone' http://localhost/beta/admin.html

gives 404 and otherhost complains that it doesn't have a file named beta/admin.html

. This happens if if

empty or not.

AND?

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You get a little known issue: If this is evil in nginx , then if

-blocks inside location

-blocks should be avoided if at all possible (link explains why and how)



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