Can a reverse-proxy be setup such that internal routes do not need to adjust to the outer servers URLs?

[larry google groups]

I searched this group for:

reverse proxy route/resources

but I found not discussions on this topic, which I find surprising.

I was developing an app and testing it on my local machine. I established my routes like this:

(defroutes app-routes

  (GET "/" request (login-form request))

  (POST "/" request (login request))

  (OPTIONS "/" request (preflight request))

  (GET "/signup" request (signup-form request))

  (PUT "/signup" request (signup request))

  (OPTIONS "/signup" request (preflight request))

  (GET "/examples" [] (examples))

  (route/resources "/")

  (route/not-found "Page not found. Please go to /examples to see how you should use this software."))

(def app

  (-> app-routes

      (wrap-cookies)

      (wrap-keyword-params)

      (wrap-multipart-params)

      (wrap-nested-params)

      (wrap-params)

      (wrap-json-params)

      (wrap-content-type)

      (wrap-not-modified)))

I had a folder layout such that:

/resources

    /templates

    /public

        /img

        /js

        /css

The templates had links in them such as: 

    <link rel="stylesheet" href="/css/bootstrap.css" />

    <link rel="stylesheet" href="/css/admin.css" />

Everything worked. I then moved this to the real server where this software will live. That server is running Apache. I established a reverse proxy like this:

        ProxyPreserveHost on

        ProxyPass /api http://127.0.0.1:34000/

        ProxyPassReverse /api http://127.0.0.1:34000/

        ProxyPass /login http://127.0.0.1:34001/

        ProxyPassReverse /login http://127.0.0.1:34001/

and then none of my links to CSS or JS worked. I had to change the URLs like this:

    <link rel="stylesheet" href="/login/css/bootstrap.css" />

    <link rel="stylesheet" href="/login/css/admin.css" />

Maybe that should have been obvious to me. But I wonder if there is a way to set up a reverse proxy such that I would not have to change the URLs in my templates? Is there a way to insulate my Clojure app from whatever URLs Apache is seeing? 

[James Reeves]

A lot of reverse proxies don't alter the body of the response, as that's a strategy that's very prone to error.

I'd approach this problem by setting a configuration variable to hold the prefix, and then adding this to the URLs you generate. If you're using Hiccup, the wrap-base-url middleware can handle this for you.

- James

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