Re: first time without state - and I'm lost
Hi @Scaramacci,
If you are starting out, it's always best to keep things as bare as
possible until you discover a better way.
If as you say you can save the usr/pwd, and the decision to keep or replace
the token is entirely left to the token provider, then I think something
like the following below, may be suitable.
For anyone interested in learning the ins and outs of OO vs Functional,
static typing vs. dynamic, I highly recommend the Programming Languages
Specialization on Coursera.
(defonce user-tokens (atom {:users {}))
(defn get-updated-token [usr pwd tok]
;; Returns tok if still valid or a new token if expired/expiring.
)
(defn get-token [usr, psw]
(let [f (fn f [tok]
[tok, (fn [] (f (get-updated-token usr psw tok)))])]
(let [path [:users usr]
[_ thunk] (or (get-in @user-tokens path) (f nil))]
(first (swap! user-tokens assoc-in path (thunk))
(defn geturl [url]
(client/get url {:oauth-token (get-token "user" "pwd")}))
On Tuesday, May 12, 2020 at 3:27:01 AM UTC-4, Scaramaccai wrote:
>
>
> (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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Re: first time without state - and I'm lost
Hi @Scaramaccai,
If you are starting out, it's always best to keepthings as bare as possible
until you discover a better way.
If as you say you can save the usr/pwd, and the decision to keep or replace
the token is entirely left to the token provider, then I think something
like the following may be suitable.
For anyone interested in learning the ins and outs of OO vs Functional,
static typing vs. dynamic, I highly recommend the Programming Languages
Specialization on Coursera.
(defonce user-tokens (atom {:users {}))
;; Returns tok if still valid or a new token if expired/expiring.
(defn get-updated-token [usr pwd tok]
;; ...
)
(defn get-token [usr, psw]
(let [f (fn f [tok]
[tok, (fn [] (f (get-updated-token usr psw tok)))])
path [:users usr]
[tok thunk] (or (get-in @user-tokens path) (f nil))]
(first (swap! user-tokens assoc-in path (thunk)
(defn geturl [url]
(client/get url {:oauth-token (get-token "user" "pwd")}))
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Re: first time without state - and I'm lost
Hi @Scaramaccai,
If you are starting out, it's always best to keepthings as bare as possible
until you discover a better way.
If as you say you can save the usr/pwd, and the decision to keep or replace
the token is entirely left to the token provider, then I think something
like the following may be suitable.
For anyone interested in learning the ins and outs of OO vs Functional,
static typing vs. dynamic, I highly recommend the Programming Languages
Specialization on Coursera.
(defonce user-tokens (atom {:users {}))
(defn get-updated-token [usr pwd tok]
;; Returns tok if still valid or a new token if expired/expiring.
)
(defn get-token [usr, psw]
(let [f (fn f [tok]
[tok, (fn [] (f (get-updated-token usr psw tok)))])
path [:users usr]
[tok thunk] (or (get-in @user-tokens path) (f nil))]
(first (swap! user-tokens assoc-in path (thunk)
(defn geturl [url]
(client/get url {:oauth-token (get-token "user" "pwd")}))
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Re: first time without state - and I'm lost
Hi @Scaramaccai,
If you are starting out, it's always best to keep things as bare as
possible until you discover a better way.
If as you say you can save the usr/pwd, and the decision to keep or replace
the token is entirely left to the token provider, then I think something
like the following may be suitable.
For anyone interested in learning the ins and outs of OO vs Functional,
static typing vs. dynamic, I highly recommend the Programming Languages
Specialization on Coursera.
(defonce user-tokens (atom {:users {}))
(defn get-updated-token [usr pwd tok]
;; Return tok if still valid or a new token
)
(defn get-token [usr, psw]
(let [f (fn f [tok]
[tok, (fn [] (f (get-updated-token usr psw tok)))])
path [:users usr]
[_ thunk] (or (get-in @user-tokens path) (f nil))
[token thunk'] (thunk)]
(do (swap! user-tokens assoc-in path thunk')
token)))
(defn geturl [url]
(client/get url {:oauth-token (get-token "user" "pwd")}))
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Re: first time without state - and I'm lost
Hi @Scaramaccai,
If you are starting out, it's always best to keep things as bare as
possible until you discover a better way.
If as you say you can save the usr/pwd, and the decision to keep or replace
the token is entirely left to the token provider, then I think something
like the following may be suitable.
For anyone interested in learning the ins and outs of OO vs Functional,
static typing vs. dynamic, I highly recommend the Programming Languages
Specialization on Coursera.
(defonce user-tokens (atom {:users {}))
(defn get-updated-token [usr pwd tok]
;; Returns tok if still valid or a new token
)
(defn get-token [usr, psw]
(let [f (fn f [tok]
[tok, (fn [] (f (get-updated-token usr psw tok)))])
path [:users usr]
thunk (or (get-in @user-tokens path) (f nil))
[token thunk'] (thunk)]
(do (swap! user-tokens assoc-in path thunk')
token)))
(defn geturl [url]
(client/get url {:oauth-token (get-token "user" "pwd")}))
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