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https://github.com/metosin/reitit

A fast data-driven routing library for Clojure/Script
https://github.com/metosin/reitit

clojure clojurescript data-driven frontend interceptors metosin-active middleware pedestal ring routing swagger

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A fast data-driven routing library for Clojure/Script

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README 

        
# reitit 



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A fast data-driven router for Clojure(Script).



* Simple data-driven [route syntax](https://cljdoc.org/d/metosin/reitit/CURRENT/doc/basics/route-syntax/)

* Route [conflict resolution](https://cljdoc.org/d/metosin/reitit/CURRENT/doc/basics/route-conflicts/)

* First-class [route data](https://cljdoc.org/d/metosin/reitit/CURRENT/doc/basics/route-data/)

* Bi-directional routing

* [Pluggable coercion](https://cljdoc.org/d/metosin/reitit/CURRENT/doc/coercion/coercion-explained) ([malli](https://github.com/metosin/malli), [schema](https://github.com/plumatic/schema) & [clojure.spec](https://clojure.org/about/spec))

* Helpers for [ring](https://cljdoc.org/d/metosin/reitit/CURRENT/doc/ring/ring-router), [http](https://cljdoc.org/d/metosin/reitit/CURRENT/doc/http/interceptors/), [pedestal](https://cljdoc.org/d/metosin/reitit/CURRENT/doc/http/pedestal/) & [frontend](https://cljdoc.org/d/metosin/reitit/CURRENT/doc/frontend/basics/)

* Friendly [Error Messages](https://cljdoc.org/d/metosin/reitit/CURRENT/doc/basics/error-messages/)

* Extendable

* Modular

* [Fast](https://cljdoc.org/d/metosin/reitit/CURRENT/doc/misc/performance)



Presentations:

* [Reitit, The Ancient Art of Data-Driven](https://www.slideshare.net/mobile/metosin/reitit-clojurenorth-2019-141438093), Clojure/North 2019, [video](https://youtu.be/cSntRGAjPiM)

* [Faster and Friendlier Routing with Reitit 0.3.0](https://www.metosin.fi/blog/faster-and-friendlier-routing-with-reitit030/)

* [Welcome Reitit 0.2.0!](https://www.metosin.fi/blog/reitit020/)

* [Data-Driven Ring with Reitit](https://www.metosin.fi/blog/reitit-ring/)

* [Reitit, Data-Driven Routing with Clojure(Script)](https://www.metosin.fi/blog/reitit/)



**Status:** [stable](https://github.com/metosin/open-source#project-lifecycle-model)



## [Full Documentation](https://cljdoc.org/d/metosin/reitit/CURRENT)



There is [#reitit](https://clojurians.slack.com/messages/reitit/) in [Clojurians Slack](http://clojurians.net/) for discussion & help.



## Main Modules



* `metosin/reitit` - all bundled

* `metosin/reitit-core` - the routing core

* `metosin/reitit-ring` - a [ring router](https://cljdoc.org/d/metosin/reitit/CURRENT/doc/ring/ring-router/)

* `metosin/reitit-middleware` - [common middleware](https://cljdoc.org/d/metosin/reitit/CURRENT/doc/ring/default-middleware/)

* `metosin/reitit-spec` [clojure.spec](https://clojure.org/about/spec) coercion

* `metosin/reitit-malli` [malli](https://github.com/metosin/malli) coercion

* `metosin/reitit-schema` [Schema](https://github.com/plumatic/schema) coercion

* `fi.metosin/reitit-openapi` [OpenAPI](https://www.openapis.org/) apidocs *

* `metosin/reitit-swagger` [Swagger2](https://swagger.io/) apidocs

* `metosin/reitit-swagger-ui` Integrated [Swagger UI](https://github.com/swagger-api/swagger-ui)

* `metosin/reitit-frontend` Tools for [frontend routing]((https://cljdoc.org/d/metosin/reitit/CURRENT/doc/frontend/basics/))

* `metosin/reitit-http` http-routing with Interceptors

* `metosin/reitit-interceptors` - [common interceptors](https://cljdoc.org/d/metosin/reitit/CURRENT/doc/http/default-interceptors/)

* `metosin/reitit-sieppari` support for [Sieppari](https://github.com/metosin/sieppari)

* `metosin/reitit-dev` - development utilities



 * - This is not a typo; the new `reitit-openapi` was released under the new, verified `fi.metosin` group. Existing

   modules will continue to be released under `metosin` for compatibility purposes.



## Extra modules



* `reitit-pedestal` support for [Pedestal](http://pedestal.io)



## Latest version



All main modules bundled:



```clj

[metosin/reitit "0.7.1"]

```



Optionally, the parts can be required separately.



Malli requires Clojure 1.11.



Malli is tested with the LTS releases Java 8, 11, 17 and 21.



## Quick start



```clj

(require '[reitit.core :as r])



(def router

  (r/router

    [["/api/ping" ::ping]

     ["/api/orders/:id" ::order]]))



(r/match-by-path router "/api/ping")

; #Match{:template "/api/ping"

;        :data {:name ::ping}

;        :result nil

;        :path-params {}

;        :path "/api/ping"}



(r/match-by-name router ::order {:id 2})

; #Match{:template "/api/orders/:id",

;        :data {:name ::order},

;        :result nil,

;        :path-params {:id 2},

;        :path "/api/orders/2"}

```



## Ring example



A Ring routing app with input & output coercion using [data-specs](https://github.com/metosin/spec-tools/blob/master/README.md#data-specs).



```clj

(require '[muuntaja.core :as m])

(require '[reitit.ring :as ring])

(require '[reitit.coercion.spec])

(require '[reitit.ring.coercion :as rrc])

(require '[reitit.ring.middleware.muuntaja :as muuntaja])

(require '[reitit.ring.middleware.parameters :as parameters])



(def app

  (ring/ring-handler

    (ring/router

      ["/api"

       ["/math" {:get {:parameters {:query {:x int?, :y int?}}

                       :responses  {200 {:body {:total int?}}}

                       :handler    (fn [{{{:keys [x y]} :query} :parameters}]

                                     {:status 200

                                      :body   {:total (+ x y)}})}}]]

      ;; router data affecting all routes

      {:data {:coercion   reitit.coercion.spec/coercion

              :muuntaja   m/instance

              :middleware [parameters/parameters-middleware

                           rrc/coerce-request-middleware

                           muuntaja/format-response-middleware

                           rrc/coerce-response-middleware]}})))

```



Valid request:



```clj

(app {:request-method :get

      :uri "/api/math"

      :query-params {:x "1", :y "2"}})

; {:status 200

;  :body {:total 3}}

```



Invalid request:



```clj

(app {:request-method :get

      :uri "/api/math"

      :query-params {:x "1", :y "a"}})

;{:status 400,

; :body {:type :reitit.coercion/request-coercion,

;        :coercion :spec,

;        :spec "(spec-tools.core/spec {:spec (clojure.spec.alpha/keys :req-un [:$spec20745/x :$spec20745/y]), :type :map, :keys #{:y :x}, :keys/req #{:y :x}})",

;        :problems [{:path [:y],

;                    :pred "clojure.core/int?",

;                    :val "a",

;                    :via [:$spec20745/y],

;                    :in [:y]}],

;        :value {:x "1", :y "a"},

;        :in [:request :query-params]}}

```



## More examples



* [`reitit-ring` with coercion, swagger and default middleware](https://github.com/metosin/reitit/blob/master/examples/ring-malli-swagger/src/example/server.clj)

* [`reitit-frontend`, the easy way](https://github.com/metosin/reitit/blob/master/examples/frontend/src/frontend/core.cljs)

* [`reitit-frontend` with Keechma-style controllers](https://github.com/metosin/reitit/blob/master/examples/frontend-controllers/src/frontend/core.cljs)

* [`reitit-http` with Pedestal](https://github.com/metosin/reitit/blob/master/examples/pedestal/src/example/server.clj)

* [`reitit-http` with Sieppari](https://github.com/metosin/reitit/blob/master/examples/http/src/example/server.clj)



All examples are in https://github.com/metosin/reitit/tree/master/examples



## External resources

* Simple web application using Ring/Reitit and Integrant: https://github.com/PrestanceDesign/usermanager-reitit-integrant-example

* A simple Clojure backend using Reitit to serve up a RESTful API: [startrek](https://github.com/dharrigan/startrek). Technologies include:

    * [Donut System](https://github.com/donut-party/system)

    * [next-jdbc](https://github.com/seancorfield/next-jdbc)

    * [JUXT Clip](https://github.com/juxt/clip)

    * [Flyway](https://github.com/flyway/flyway)

    * [HoneySQL](https://github.com/seancorfield/honeysql)

    * [Babashka](https://babashka.org)

* https://www.learnreitit.com/

* Lipas, liikuntapalvelut: https://github.com/lipas-liikuntapaikat/lipas

* Implementation of the Todo-Backend API spec, using Clojure, Ring/Reitit and next-jdbc: https://github.com/PrestanceDesign/todo-backend-clojure-reitit

* Ping CRM, a single page app written in Clojure Ring, Reitit, Integrant and next.jdbc: https://github.com/prestancedesign/clojure-inertia-pingcrm-demo



## More info



[Check out the full documentation!](https://cljdoc.org/d/metosin/reitit/CURRENT/)



Join [#reitit](https://clojurians.slack.com/messages/reitit/) channel in [Clojurians slack](http://clojurians.net/).



Roadmap is mostly written in [issues](https://github.com/metosin/reitit/issues).



## Special thanks



* Existing Clojure(Script) routing libs, especially to

[Ataraxy](https://github.com/weavejester/ataraxy), [Bide](https://github.com/funcool/bide), [Bidi](https://github.com/juxt/bidi), [calfpath](https://github.com/ikitommi/calfpath), [Compojure](https://github.com/weavejester/compojure), [Keechma](https://keechma.com/) and

[Pedestal](https://github.com/pedestal/pedestal/tree/master/route).

* [Compojure-api](https://github.com/metosin/compojure-api), [Kekkonen](https://github.com/metosin/kekkonen), [Ring-swagger](https://github.com/metosin/ring-swagger) and [Yada](https://github.com/juxt/yada) and for ideas, coercion & stuff.

* [Schema](https://github.com/plumatic/schema) and [clojure.spec](https://clojure.org/about/spec) for the validation part.

* [httprouter](https://github.com/julienschmidt/httprouter) for ideas and a good library to benchmark against



## License



Copyright © 2017-2023 [Metosin Oy](http://www.metosin.fi)



Distributed under the Eclipse Public License, the same as Clojure.