+
+
+
+
+
+
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+
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+
+
+
+ Default handler
+By default, if no routes match, nil is returned, which is not valid response in Ring:
(require '[reitit.ring :as ring])
+
+(defn handler [_]
+ {:status 200, :body ""})
+
+(def app
+ (ring/ring-handler
+ (ring/router
+ ["/ping" handler])))
+
+(app {:uri "/invalid"})
+; nil
+Setting the default-handler as a second argument to ring-handler:
(def app
+ (ring/ring-handler
+ (ring/router
+ ["/ping" handler])
+ (constantly {:status 404, :body ""})))
+
+(app {:uri "/invalid"})
+; {:status 404, :body ""}
+To get more correct http error responses, ring/create-default-handler can be used. It differentiates :not-found (no route matched), :method-not-accepted (no method matched) and :not-acceptable (handler returned nil).
With defaults:
+(def app
+ (ring/ring-handler
+ (ring/router
+ [["/ping" {:get handler}]
+ ["/pong" (constantly nil)]])
+ (ring/create-default-handler)))
+
+(app {:request-method :get, :uri "/ping"})
+; {:status 200, :body ""}
+
+(app {:request-method :get, :uri "/"})
+; {:status 404, :body ""}
+
+(app {:request-method :post, :uri "/ping"})
+; {:status 405, :body ""}
+
+(app {:request-method :get, :uri "/pong"})
+; {:status 406, :body ""}
+With custom responses:
+(def app
+ (ring/ring-handler
+ (ring/router
+ [["/ping" {:get handler}]
+ ["/pong" (constantly nil)]])
+ (ring/create-default-handler
+ {:not-found (constantly {:status 404, :body "kosh"})
+ :method-not-allowed (constantly {:status 405, :body "kosh"})
+ :not-acceptable (constantly {:status 406, :body "kosh"})})))
+
+(app {:request-method :get, :uri "/ping"})
+; {:status 200, :body ""}
+
+(app {:request-method :get, :uri "/"})
+; {:status 404, :body "kosh"}
+
+(app {:request-method :post, :uri "/ping"})
+; {:status 405, :body "kosh"}
+
+(app {:request-method :get, :uri "/pong"})
+; {:status 406, :body "kosh"}
+
+
+
+
+
+ results matching ""
+
+
+
+