multihop, but with memcached

[Adam Wiggins]

In the config below, the request has three branches through which it may travel:

- Request is a GET, serve from memcached if the key exists.
- Request is a GET, memcached returns a 4040, so fallback to the app server.
- Request is a POST, PUT, or DELETE, so go straight to the app server.

My question is, how can I unify the second two branches, so as not to
duplicate all the config directives for that branch?

location / {
   if ($request_method = GET) {
      set $memcached_key $uri;
      memcached_pass 127.0.0.1:11211;
      error_page 404 502 = @myapp;
      break;
   }

   # app config block
   proxy_set_header Host $host;
   proxy_set_header X-Real-IP $remote_addr;
   proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
   proxy_pass http://myapp_mongrels;
}

location @myapp {
   # app config block (duplicate)
   proxy_set_header Host $host;
   proxy_set_header X-Real-IP $remote_addr;
   proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
   proxy_pass http://myapp_mongrels;
}