Nginx proxy_pass filtered by HTTP verbs.

nginx.conf

# From http://stackoverflow.com/questions/8591600/nginx-proxy-pass-based-on-whether-request-method-is-post-put-or-delete

server {
  location / {
    # This proxy_pass is used for requests that don't
    # match the limit_except
    proxy_pass http://127.0.0.1:8080;

    # For requests that *aren't* a PUT, POST, or DELETE,
    # pass to :9080
    limit_except PUT POST DELETE {
      proxy_pass http://127.0.0.1:9080;
    }
  }
}