reitit-http example

examples/http/README.md

@@ -7,7 +7,12 @@
 (start)
 ```
 
-Go with browser to http://localhost:3000
+Go with browser to:
+
+* http://localhost:3000/api/sync - synchronous
+* http://localhost:3000/api/async - with core.async
+* http://localhost:3000/api/future - with futures
+
 
 ## License
 

examples/http/project.clj

@@ -1,6 +1,7 @@
 (defproject ring-example "0.1.0-SNAPSHOT"
   :description "Reitit Ring App with Swagger"
   :dependencies [[org.clojure/clojure "1.9.0"]
+                 [org.clojure/core.async "0.4.474"]
                  [ring "1.6.3"]
                  [metosin/reitit "0.2.0-SNAPSHOT"]]
   :repl-options {:init-ns example.server})

examples/http/src/example/server.clj

@@ -1,17 +1,46 @@
 (ns example.server
   (:require [reitit.http :as http]
             [reitit.ring :as ring]
+            [clojure.core.async :as a]
             [reitit.interceptor.sieppari]
             [ring.adapter.jetty :as jetty]))
 
+(defn -interceptor [f x]
+  {:enter (fn [ctx] (f (update-in ctx [:request :via] (fnil conj []) x)))
+   :leave (fn [ctx] (f (update-in ctx [:response :body] str "\n<- " x)))})
+
+(def interceptor (partial -interceptor identity))
+(def future-interceptor (partial -interceptor #(future %)))
+(def async-interceptor (partial -interceptor #(a/go %)))
+
+(defn -handler [f {:keys [via]}]
+  (f {:status 200,
+      :body (str (apply str (map #(str "-> " % "\n") via)) "   hello!")}))
+
+(def handler (partial -handler identity))
+(def future-handler (partial -handler #(future %)))
+(def async-handler (partial -handler #(a/go %)))
+
 (def app
   (http/ring-handler
     (http/router
-      ["/" {:get (fn [request]
-                   {:status 200
-                    :body "hello!"})}])
-    (ring/routes
-      (ring/create-default-handler))
+      ["/api"
+       {:interceptors [(interceptor :api)]}
+
+       ["/sync"
+        {:interceptors [(interceptor :sync)]
+         :get {:interceptors [(interceptor :hello)]
+               :handler handler}}]
+
+       ["/async"
+        {:interceptors [(async-interceptor :async)]
+         :get {:interceptors [(async-interceptor :async-hello)]
+               :handler async-handler}}]
+       ["/future"
+        {:interceptors [(future-interceptor :sync)]
+         :get {:interceptors [(future-interceptor :hello)]
+               :handler future-handler}}]])
+    (ring/create-default-handler)
     {:executor reitit.interceptor.sieppari/executor}))
 
 (defn start []