reitit/CHANGELOG.md

## UNRELEASED

### `reitit-core`

* `reitit.core/Expand` can be extended, fixes [#201](https://github.com/metosin/reitit/issues/201).
* new snappy Java-backed `SegmentTrie` routing algorithm and data structure backing `reitit.core/segment-router`, making wildcard routing 2x faster on the JVM
* `reitit.core/linear-router` uses the segment router behind the scenes, 2-4x faster on the JVM too.

### `reitit-ring`

* new options `:inject-match?` and `:inject-router?` on `reitit.ring/ring-handler` to optionally not to inject `Router` and `Match` into the request. See [performance guide](https://metosin.github.io/reitit/performance.html#faster!) for details.

### `reitit-http`

* new options `:inject-match?` and `:inject-router?` on `reitit.http/ring-handler` and `reitit.http/routing-interceptor` to optionally not to inject `Router` and `Match` into the request. See [performance guide](https://metosin.github.io/reitit/performance.html#faster!) for details.

### dependencies 

* updated:

```clj
[metosin/spec-tools "0.8.3"] is available but we use "0.8.2"
```

## 0.2.10 (2018-12-30)

### `reitit-core`

* `segment-router` doesn't accept empty segments as path-parameters, fixes [#181](https://github.com/metosin/reitit/issues/181).
* path-params are decoded correctly with `r/match-by-name`, fixes [#192](https://github.com/metosin/reitit/issues/192).
* new `:quarantine-router`, which is uses by default if there are any path conflicts: uses internally `:mixed-router` for non-conflicting routes and `:linear-router` for conflicting routes.

```clj
(-> [["/joulu/kinkku"]   ;; linear-router
     ["/joulu/:torttu"]  ;; linear-router
     ["/tonttu/:id"]     ;; segment-router
     ["/manna/puuro"]    ;; lookup-router
     ["/sinappi/silli"]] ;; lookup-router
    (r/router {:conflicts nil})
    (r/router-name))
; => :quarantine-router
```

* `reitit.interceptor/transform-butlast` helper to transform the interceptor chains (last one is usually the handler).

## `reitit-middleware`

* `reitit.ring.middleware.dev/print-request-diffs` middleware transformation function to print out request diffs between middleware to the console
  * read the [docs](https://metosin.github.io/reitit/ring/transforming_middleware_chain.html#printing-request-diffs)
  * see [example app](https://github.com/metosin/reitit/tree/master/examples/ring-swagger)

<img src="https://metosin.github.io/reitit/images/ring-request-diff.png" width=320>

## `reitit-interceptors`

* `reitit.http.interceptors.dev/print-context-diffs` interceptor transformation function to print out context diffs between interceptor steps to the console:
  * read the [docs](https://metosin.github.io/reitit/http/transforming_interceptor_chain.html#printing-context-diffs)
  * see [example app](https://github.com/metosin/reitit/tree/master/examples/http-swagger)

<img src="https://metosin.github.io/reitit/images/http-context-diff.png" width=320>

## `reitit-sieppari`

* New version of Sieppari allows interceptors to run on ClojureScript too.

### `reitit-pedestal`

* new optional module for [Pedestal](http://pedestal.io/) integration. See [the docs](https://metosin.github.io/reitit/http/pedestal.html).

### dependencies

* updated:

```clj
[metosin/muuntaja "0.6.3"] is available but we use "0.6.1"
[metosin/sieppari "0.0.0-alpha6"] is available but we use "0.0.0-alpha7"
```

## 0.2.9 (2018-11-21)

### `reitit-spec`

* support for vector data-specs for request & response parameters by [Heikki Hämäläinen](https://github.com/hjhamala).

## 0.2.8 (2018-11-18)

### `reitit-core`

* Added support for composing middleware & interceptor transformations, fixes [#167](https://github.com/metosin/reitit/issues/167).

### `reitit-spec`

* Spec problems are exposed as-is into request & response coercion errors, enabling pretty-printers like [expound](https://github.com/bhb/expound) to be used:

```clj
(require '[reitit.ring :as ring])
(require '[reitit.ring.middleware.exception :as exception])
(require '[reitit.ring.coercion :as coercion])
(require '[expound.alpha :as expound])

(defn coercion-error-handler [status]
  (let [printer (expound/custom-printer {:theme :figwheel-theme, :print-specs? false})
        handler (exception/create-coercion-handler status)]
    (fn [exception request]
      (printer (-> exception ex-data :problems))
      (handler exception request))))

(def app
  (ring/ring-handler
    (ring/router
      ["/plus"
       {:get
        {:parameters {:query {:x int?, :y int?}}
         :responses {200 {:body {:total pos-int?}}}
         :handler (fn [{{{:keys [x y]} :query} :parameters}]
                    {:status 200, :body {:total (+ x y)}})}}]
      {:data {:coercion reitit.coercion.spec/coercion
              :middleware [(exception/create-exception-middleware
                             (merge
                               exception/default-handlers
                               {:reitit.coercion/request-coercion (coercion-error-handler 400)
                                :reitit.coercion/response-coercion (coercion-error-handler 500)}))
                           coercion/coerce-request-middleware
                           coercion/coerce-response-middleware]}})))

(app
  {:uri "/plus"
   :request-method :get
   :query-params {"x" "1", "y" "fail"}})

(app
  {:uri "/plus"
   :request-method :get
   :query-params {"x" "1", "y" "-2"}})
```

### `reitit-swagger`

* `create-swagger-handler` support now 3-arity ring-async, thanks to [Miloslav Nenadál](https://github.com/nenadalm)

## 0.2.7 (2018-11-11)

### `reitit-spec`

* Fixes [spec coercion issue with aliased specs](https://github.com/metosin/spec-tools/issues/145)

* updated deps:

```clj
[metosin/spec-tools "0.8.2"] is available but we use "0.8.1"
```

## 0.2.6 (2018-11-09)

### `reitit-core`

* Faster path-parameter decoding: doing less work when parameters don't need decoding. Wildcard-routing is now 10-15% faster in perf tests (opensensors & github api).
* Fixed a ClojureScript compiler warning about private var usage. [#169](https://github.com/metosin/reitit/issues/169)

### `reitit-ring`

* `redirect-trailing-slash-handler` can strip multiple slashes from end of the uri, by [Hannu Hartikainen](https://github.com/dancek).
* Fixed a ClojureScript compiler warning about `satisfies?` being a macro.

* updated deps:

```clj
[ring "1.7.1"] is available but we use "1.7.0"
```

### `reitit-spec`

* updated deps:

```clj
[metosin/spec-tools "0.8.1"] is available but we use "0.8.0"
```

### `reitit-schema`

* updated deps:

```clj
[metosin/schema-tools "0.10.5"] is available but we use "0.10.4"
```

### `reitit-sieppari`

* updated deps:

```clj
[metosin/sieppari "0.0.0-alpha6"] is available but we use "0.0.0-alpha5"
```

## 0.2.5 (2018-10-30)

### `reitit-ring`

* router is injected into request also in the default branch
* new `reitit.ring/redirect-trailing-slash-handler` to [handle trailing slashes](https://metosin.github.io/reitit/ring/slash_handler.html) with style!
  * Fixes [#92](https://github.com/metosin/reitit/issues/92), thanks to [valerauko](https://github.com/valerauko).

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

(def app
  (ring/ring-handler
    (ring/router
      [["/ping" (constantly {:status 200, :body ""})]
       ["/pong/" (constantly {:status 200, :body ""})]])
    (ring/redirect-trailing-slash-handler)))

(app {:uri "/ping/"})
; {:status 308, :headers {"Location" "/ping"}, :body ""}

(app {:uri "/pong"})
; {:status 308, :headers {"Location" "/pong/"}, :body ""}
```

* updated deps:

```clj
[ring/ring-core "1.7.1"] is available but we use "1.7.0"
```

### `reitit-http`

* router is injected into request also in the default branch

## 0.2.4 (2018-10-21)

### `reitit-ring`

* New option `:not-found-handler` in `reitit.ring/create-resource-handler` to set how 404 is handled. Fixes [#89](https://github.com/metosin/reitit/issues/89), thanks to [valerauko](https://github.com/valerauko).

### `reitit-spec`

* Latest features from [spec-tools](https://github.com/metosin/spec-tools)
  * Swagger enchancements
  * Better spec coercion via `st/coerce` using spec walking & inference: many simple specs (core predicates, `spec-tools.core/spec`, `s/and`, `s/or`, `s/coll-of`, `s/keys`, `s/map-of`, `s/nillable` and `s/every`) can be transformed without needing spec to be wrapped. Fallbacks to old conformed based approach.
  * [example app](https://github.com/metosin/reitit/blob/master/examples/ring-spec-swagger/src/example/server.clj).
  
* updated deps:

```clj
[metosin/spec-tools "0.8.0"] is available but we use "0.7.1"
```

## 0.2.3 (2018-09-24)

### `reitit-ring`

* `ring-handler` takes optionally a 3rd argument, an options map which can be used to se top-level middleware, applied before any routing is done:

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

(defn wrap [handler id]
  (fn [request]
    (handler (update request ::acc (fnil conj []) id))))

(defn handler [{:keys [::acc]}]
  {:status 200, :body (conj acc :handler)})

(def app
  (ring/ring-handler
    (ring/router
      ["/api" {:middleware [[mw :api]]}
       ["/get" {:get handler}]])
    (ring/create-default-handler)
    {:middleware [[mw :top]]}))

(app {:request-method :get, :uri "/api/get"})
; {:status 200, :body [:top :api :ok]}

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

(-> app (ring/get-router))
; #object[reitit.core$single_static_path_router]
```

* `:options` requests are served for all routes by default with 200 OK to better support things like [CORS](https://en.wikipedia.org/wiki/Cross-origin_resource_sharing)
  * the default handler is not documented in Swagger
  * new router option `:reitit.ring/default-options-handler` to change this behavior. Setting `nil` disables this.

* updated deps:

```clj
[ring/ring-core "1.7.0"] is available but we use "1.6.3"
```

### `reitit-http`

* `:options` requests are served for all routes by default with 200 OK to better support things like [CORS](https://en.wikipedia.org/wiki/Cross-origin_resource_sharing)
  * the default handler is not documented in Swagger
  * new router option `:reitit.http/default-options-handler` to change this behavior. Setting `nil` disables this.

### `reitit-middleware`

* fix `reitit.ring.middleware.parameters/parameters-middleware`

* updated deps:

```clj
[metosin/muuntaja "0.6.1"] is available but we use "0.6.0"
```

### `reitit-swagger-ui`

* updated deps:

```clj
[metosin/jsonista "0.2.2"] is available but we use "0.2.1"
```

## 0.2.2 (2018-09-09)

* better documentation for interceptors
* sample apps:
  * [Sieppari, reitit-http & swagger](https://github.com/metosin/reitit/blob/master/examples/http-swagger/src/example/server.clj)
  * [Pedestal, reitit-http & swagger](https://github.com/metosin/reitit/blob/master/examples/pedestal-swagger/src/example/server.clj)

### `reitit-middleware`

* new middleware `reitit.ring.middleware.parameters/parameters-middleware` to wrap query & form params.

### `reitit-interceptors`

* new module like `reitit-middleware` but for interceptors. See the [Docs](https://metosin.github.io/reitit/http/default_interceptors.html).

## 0.2.1 (2018-09-04)

### `reitit-schema`

* updated deps:

```clj
[metosin/schema-tools "0.10.4"] is available but we use "0.10.3"
```

### `reitit-middleware`

* updated deps:

```clj
[metosin/muuntaja "0.6.0"] is available but we use "0.6.0-alpha5"
```

## 0.2.0 (2018-09-03)

Sample apps demonstraing the current status of `reitit`:

* [`reitit-ring` with coercion, swagger and default middleware](https://github.com/metosin/reitit/blob/master/examples/ring-swagger/src/example/server.clj)
* [`reitit-frontend`, the easy way](https://github.com/metosin/reitit/blob/master/examples/frontend/src/frontend/core.cljs)
* [`reitit-frontent` 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)

### `reitit-core`

* **BREAKING**: the router option key to extract body format has been renamed: `:extract-request-format` => `:reitit.coercion/extract-request-format`
  * should only concern you if you are not using [Muuntaja](https://github.com/metosin/muuntaja).
* the `r/routes` returns just the path + data tuples as documented, not the compiled route results. To get the compiled results, use `r/compiled-routes` instead.
* new [faster](https://github.com/metosin/reitit/blob/master/perf-test/clj/reitit/impl_perf_test.clj) and more correct encoders and decoders for query & path params.
  * all path-parameters are now decoded correctly with `reitit.impl/url-decode`, thanks to [Matthew Davidson](https://github.com/KingMob)!
  * query-parameters are encoded with `reitit.impl/form-encode`, so spaces are `+` instead of `%20`.
* correctly read `:header` params from request `:headers`, not `:header-params`
* welcome route name conflict resolution! If router has routes with same names, router can't be created. fix 'em.
* sequential child routes are allowed, enabling this:

```clj
(-> ["/api"
     (for [i (range 4)]
       [(str "/" i)])]
    (r/router)
    (r/routes))
;[["/api/0" {}]
; ["/api/1" {}]
; ["/api/2" {}]
; ["/api/3" {}]]
```

* A [Guide to compose routers](https://metosin.github.io/reitit/advanced/composing_routers.html)
* Welcome Middleware and Intercetor Registries!
  * when Keywords are used in place of middleware / interceptor, a lookup is done into Router option `::middleware/registry` (or `::interceptor/registry`) with the key. Fails fast with missing registry entries.
  * fixes [#32](https://github.com/metosin/reitit/issues/32).
  * full documentation [here](https://metosin.github.io/reitit/ring/middleware_registry.html).
  
 ```clj
(require '[reitit.ring :as ring])
(require '[reitit.middleware :as middleware])

(defn wrap-bonus [handler value]
  (fn [request]
    (handler (update request :bonus (fnil + 0) value))))

(def app
  (ring/ring-handler
    (ring/router
      ["/api" {:middleware [[:bonus 20]]}
       ["/bonus" {:middleware [:bonus10]
                 :get (fn [{:keys [bonus]}]
                        {:status 200, :body {:bonus bonus}})}]]
      {::middleware/registry {:bonus wrap-bonus
                              :bonus10 [:bonus 10]}})))

(app {:request-method :get, :uri "/api/bonus"})
; {:status 200, :body {:bonus 30}}
 ```

### `reitit-swagger`

* In case of just one swagger api per router, the swagger api doesn't have to identified, so this works now:

```clj
(require '[reitit.ring :as ring])
(require '[reitit.swagger :as swagger])
(require '[reitit.swagger-ui :as swagger-ui])

(ring/ring-handler
  (ring/router
    [["/ping"
      {:get (fn [_] {:status 200, :body "pong"})}]
     ["/swagger.json"
      {:get {:no-doc true
             :handler (swagger/create-swagger-handler)}}]])
  (swagger-ui/create-swagger-ui-handler {:path "/"}))
```

### `reitit-middleware`

* A new module with common data-driven middleware: exception handling, content negotiation & multipart requests. See [the docs](https://metosin.github.io/reitit/ring/default_middleware.html).


### `reitit-swagger-ui`

* **BREAKING**: pass swagger-ui `:config` as-is (instead of mixed-casing keys) to swagger-ui, fixes [#109](https://github.com/metosin/reitit/issues/109):
  * see [docs](https://github.com/swagger-api/swagger-ui/tree/2.x#parameters) for available parameters.

```clj
(swagger-ui/create-swagger-ui-handler
  {:path "/"
   :url "/api/swagger.json"
   :config {:jsonEditor true
            :validatorUrl nil}})
```

### `reitit-frontend`

* new module for frontend-routing. See [docs](https://metosin.github.io/reitit/frontend/basics.html) for details.

## 0.1.3 (2018-6-25)

### `reitit-core`

* `reitit.coercion/coerce!` coerced all parameters found in match, e.g. injecting in `:query-parameters` into `Match` with coerce those too if `:query` coercion is defined.
* if response coercion is not defined for a response status, response is still returned
* `spec-tools.data-spec/maybe` can be used in spec-coercion.

```clj
(def router
  (reitit.core/router
    ["/spec" {:coercion reitit.coercion.spec/coercion}
     ["/:number/:keyword" {:parameters {:path {:number int?
                                               :keyword keyword?}
                                        :query (ds/maybe {:int int?})}}]]
    {:compile reitit.coercion/compile-request-coercers}))

(-> (reitit.core/match-by-path router "/spec/10/kikka")
    (assoc :query-params {:int "10"})
    (reitit.coercion/coerce!))
; {:path {:number 10, :keyword :kikka}
;  :query {:int 10}}
```

* `reitit.core/match->path` to create full paths from match, including the query parameters:

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

(-> (r/router ["/:a/:b" ::route])
    (r/match-by-name! ::route {:a "olipa", :b "kerran"})
    (r/match->path))
; "/olipa/kerran"

(-> (r/router ["/:a/:b" ::route])
    (r/match-by-name! ::route {:a "olipa", :b "kerran"})
    (r/match->path {:iso "pöriläinen"}))
; "/olipa/kerran?iso=p%C3%B6ril%C3%A4inen"
```

### `reitit-spec`

* `[metosin/spec-tools "0.7.1"]` with swagger generation enhancements, see the [CHANGELOG](https://github.com/metosin/spec-tools/blob/master/CHANGELOG.md)
* if response coercion is not defined for a response status, no `:schema` is not emitted.
* updated dependencies:

```clj
[metosin/spec-tools "0.7.1"] is available but we use "0.7.0"
```

### `reitit-schema`

* if response coercion is not defined for a response status, no `:schema` is not emitted.

## 0.1.2 (2018-6-6)

### `reitit-core`

* Better handling of `nil` in route syntax:
  * explicit `nil` after path string is always handled as `nil` route
  * `nil` as path string causes the whole route to be `nil`
  * `nil` as child route is stripped away

```clj
(testing "nil routes are stripped"
  (is (= [] (r/routes (r/router nil))))
  (is (= [] (r/routes (r/router [nil ["/ping"]]))))
  (is (= [] (r/routes (r/router [nil [nil] [[nil nil nil]]]))))
  (is (= [] (r/routes (r/router ["/ping" [nil "/pong"]])))))
```
### `reitit-ring`

* Use HTTP redirect (302) with index-files in `reitit.ring/create-resource-handler`.
* `reitit.ring/create-default-handler` now conforms to [RING Spec](https://github.com/ring-clojure/ring/blob/master/SPEC), Fixes [#83](https://github.com/metosin/reitit/issues/83)

### `reitit-schema`

* updated dependencies:

```clj
[metosin/schema-tools "0.10.3"] is available but we use "0.10.2"
```

### `reitit-swagger`

* Fix Swagger-paths, by [Kirill Chernyshov](https://github.com/DeLaGuardo).

### `reitit-swagger-ui`

* Use HTTP redirect (302) with index-files in `reitit.swagger-ui/create-swagger-ui-handler`.

* updated dependencies:

```clj
[metosin/jsonista "0.2.1"] is available but we use "0.2.0"
```

## 0.1.1 (2018-5-20)

### `reitit-core`

* `linear-router` now works with unnamed catch-all parameters, e.g. `"/files/*"`
* `match-by-path` encodes parameters into strings using (internal) `reitit.impl/IntoString` protocol. Handles all of: strings, numbers, keywords, booleans, objects. Fixes [#75](https://github.com/metosin/reitit/issues/75).

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

(r/match-by-name
  (r/router
    ["/coffee/:type" ::coffee])
  ::coffee
  {:type :luwak})
;#Match{:template "/coffee/:type",
;       :data {:name :user/coffee},
;       :result nil,
;       :path-params {:type "luwak"},
;       :path "/coffee/luwak"}
```

### `reitit-ring`

* `reitit.ring/default-handler` now works correctly with async ring
* new helper `reitit.ring/router` to compose routes outside of a router.
* `reitit.ring/create-resource-handler` function to serve static routes. See [docs](https://metosin.github.io/reitit/ring/static.html).

* new dependencies:

```clj
[ring/ring-core "1.6.3"]
```

### `reitit-swagger`

* New module to produce swagger-docs from routing tree, including `Coercion` definitions. Works with both middleware & interceptors and Schema & Spec. See [docs](https://metosin.github.io/reitit/ring/swagger.html) and [example project](https://github.com/metosin/reitit/tree/master/examples/ring-swagger).

### `reitit-swagger-ui`

New module to server pre-integrated [Swagger-ui](https://github.com/swagger-api/swagger-ui). See [docs](https://metosin.github.io/reitit/ring/swagger.html#swagger-ui).

* new dependencies:

```clj
[metosin/jsonista "0.2.0"]
[metosin/ring-swagger-ui "2.2.10"]
```

### dependencies

```clj
[metosin/spec-tools "0.7.0"] is available but we use "0.6.1"
[metosin/schema-tools "0.10.2"] is available but we use "0.10.1"
```

## 0.1.0 (2018-2-19)

* First release