Hi everyone,
I wanted to give a try to Clojure and functional programming in general but
I can't really stop thinking "object oriented" or "with state everywhere".
After 20+ years with objects + state I guess I'm lost without them :)
The first thing I want to try is to get some data from an API that needs
OAuth authentication. I would like to hide the fact that there's an OAuth
token to be sent. In pseudo-Java I would do something like:
class MyAuthHttpClient {
private token;
public MyAuthHttpClient(String usr, String psw) {...}
public ... getResponse(Url) {
// here check if token is available and if it is expiring;
// if expiring -> fetch a new token before call the http service
// caller doesn't even know there's a token involved in the process
}
}
What's the proper way to do that in Clojure?
I guess one way would be to have a function that returns a new token given
a (possibly old) token and user+psw
(defn gettkn [usr, psw, tkn] (return a new token if tkn is expiring or tkn if
not expiring))
(def wrap-gettkn (partial gettkn "myuser" "mypass"))
(defn geturl [url, tkn] client/get url {:oauth-token (wrap-gettkn tkn)})
I can "save" usr and psw, but I always have to "keep" the tkn around at
every level;
while I would like the token to be "hidden" to the "geturl" clients (just
like I did in the "private token" in the pseudo-Java).
What's the proper way of doing something like this in Clojure?
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