I have a classified clojure web app I want to host on Heroku. The domain is registered at Godaddy.
What would be the most effective and efficient way to have multiple subdomains:
Users, all logic, should be shared across subdomains, so I'd love to have only one code base.
It would be easy to redirect subdomains to first level folder like this:
paris.classapp.com -> classapp.com/paris/
But I want users to keep seeing the subdomain while browsing the site, like this:
paris.classapp.com/cars/blue-car-to-sell
As opposed to this:classapp.com/paris/cars/blue-car-to-sell
What should I do?
Heroku support wildcard subdomains: https://devcenter.heroku.com/articles/custom-domains#wildcard-domains.
You will have in the host header the original domain, which you can use with something like (completely untested):
(GET "/" {{host "host"} :headers} (str "Welcomed to " host))
You could also create your own routing MW (completely untested):
(defn domain-routing [domain-routes-map]
(fn [req]
(when-let [route (get domain-routes-map (get-in req [:headers "host"]))]
(route req))))
And use it with something like:
(defroutes paris
(GET "/" [] "I am in Paris"))
(defroutes new-new-york
(GET "/" [] "I am in New New York"))
(def my-domain-specific-routes
(domain-routing {"paris.example.com" paris "newnewyork.example.com" new-new-york}))
And yet another option is to create a "mod-rewrite" MW that modifies the uri before getting to the Compojure routes:
(defn subdomain-mw [handler]
(fn [req]
(let [new-path (str (subdomain-from-host (get-in req [:headers "host"])
"/"
(:uri req))]
(handler (assoc req :uri new-path))))
(defroutes my-routes
(GET "/:subdomain/" [subdomain] (str "Welcomed to " subdomain))
Pick the one that suits your requirements.