Standard Ring middleware functions for handling JSON requests and responses.
To install, add the following to your project :dependencies:
[ring/ring-json "0.5.1"]
The wrap-json-response middleware will convert any response with a
collection as a body (e.g. map, vector, set, seq, etc) into JSON:
(require '[ring.middleware.json :refer [wrap-json-response]]
'[ring.util.response :refer [response]])
(defn handler [request]
(response {:foo "bar"}))
(def app
(wrap-json-response handler))The wrap-json-body middleware will parse the body of any request
with a JSON content-type into a Clojure data structure, and assign it
to the :body key.
This is the preferred way of handling JSON requests.
(use '[ring.middleware.json :only [wrap-json-body]]
'[ring.util.response :only [response]])
(defn handler [request]
(prn (get-in request [:body "user"]))
(response "Uploaded user."))
(def app
(wrap-json-body handler {:keywords? true :bigdecimals? true}))The wrap-json-params middleware is an alternative to
wrap-json-body for when it's convenient to treat a JSON request as a
map of parameters. Rather than replace the :body key, the parsed
data structure will be assigned to the :json-params. The parameters
will also be merged into the standard :params map.
(require '[ring.middleware.json :refer [wrap-json-params]]
'[ring.util.response :refer [response]])
(defn handler [request]
(prn (get-in request [:params "user"]))
(response "Uploaded user."))
(def app
(wrap-json-params handler))Note that Ring parameter maps use strings for keys. For consistency,
this means that wrap-json-params does not have a :keywords?
option. Instead, use the standard Ring wrap-keyword-params function:
(require '[ring.middleware.keyword-params :refer [wrap-keyword-params]])
(def app
(-> handler
wrap-keyword-params
wrap-json-params))Copyright © 2021 James Reeves
Distributed under the MIT License, the same as Ring.