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How can I communicate with the backend using ClojureScript and Figwheel?

Note. I am an experienced programmer in general and using clojure, but have never done any serious web development.

I installed the base ClojureScript project using Chestnut and went through the "Hello World" steps just fine. However, I would really like to talk with my backend. To do this, I redefined the reagent code

(defn greeting []
  [:input {:type "button"
       :value (:text @app-state)
       :on-click #(http/get {})}])

Which gets 404 response when clicked. At least I'm talking to someone. I also see evidence of my receive requests in the server.log file. However, at the moment I am struggling with several conceptual points.

First of all, http / get is a function defined in clj-http.client that was not part of the Chestnut setup. It seems that I am no longer aware if I need to go in search of libraries to send something basic, like a request for receipt.

Secondly, the file for the user namespace has the following lines, predefined by chestnut:

(def http-handler
  (wrap-reload #'mypage.server/http-handler))

(defn run []
  (figwheel/start-figwheel!))

I do not see the place where the http handler is ever used. Therefore, I do not understand what such a definition even makes.

, , Figwheel, "run", -, a) index.html b) TCP- JavaScript . . , , , Figwheel API, .

, , http-, mypage/server.clj(), - , get, , . , , get-request, , Figuheel-, . , - http, .

(defroutes routes
  (GET "/" _
    {:status 200
     :headers {"Content-Type" "text/html; charset=utf-8"}
     :body (io/input-stream (io/resource "public/index.html"))})
  (resources "/"))

(def http-handler
  (-> routes
      (wrap-defaults api-defaults)
      wrap-with-logger
      wrap-gzip))
+4
2

ClojureScript (.. Clojure), , : https://github.com/r0man/cljs-http

+1

, , .

  • Clojurescript JavaScript ( ) Google Closure. , , JavaScript- AJAX , JS. - . docs https://developers.google.com/closure/library/docs/xhrio. http Ajax clojurescript, ? clojurescript , Google, , , , ( - , ), (? ) .

  • Figwheel - , , dev, , HTTP-, . , cljs, front-end, figwheel --- . Figwheel , , , .

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