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example of ring, compojure and hiccup

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live.clj
Clojure
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(use 'ring.util.response
'ring.adapter.jetty)
 
 
;;;;; handler
(defn hello-handler [req]
(->
(response "Hello")
(content-type "text/html")))
 
(hello-handler {:uri "/index"})
 
(def s (run-jetty hello-handler {:port 8080 :join? false}))
(.stop s)
;;(.start s)
;;http://localhost:8080/
 
 
(-> "a b c d"
.toUpperCase
(.replace "A" "X")
(.split " ")
first)
 
(defn wrap-do-nothing [handler]
(fn [req]
(handler req)))
 
(wrap-do-nothing hello-handler)
 
((wrap-do-nothing hello-handler) {:uri "index"})
 
 
;(run-jetty (wrap-do-nothing hello-handler) {:port 3001 })
(def s (run-jetty (wrap-do-nothing hello-handler) {:port 8080 :join? false}))
 
(defn wrap-add-header [handler]
(fn [request]
(let [resp (handler request)
headers (:headers resp)]
(assoc resp :headers
(assoc headers "X-Test" "My server!")))))
 
(defn name-handler [{params :params}]
(response (str "Hello " (get params "name"))))
(def s (run-jetty name-handler {:port 8080 :join? false}))
;; http://localhost:8080/?name=tzach
(.stop s)
 
(use 'ring.middleware.params)
(def s (run-jetty (wrap-params name-handler) {:port 8080 :join? false}))
(.stop s)
 
 
(defn name-handler2 [{params :params}]
(response (str "Hello " (:name params))))
 
(source wrap-keyword-params)
 
(use 'ring.middleware.keyword-params)
(def s (run-jetty
(-> name-handler2
wrap-keyword-params
wrap-params)
{:port 8080 :join? false}))
 
 
;;;;; routing
(not-found "Page not found")
 
(defn route-handler [req]
(case (:uri req)
"/haifa" (response "hello Haifa")
"/yagur" (response "hello Yagur")
(not-found "Page not found")))
 
(route-handler {:uri "/haifa"})
 
(use 'compojure.core)
 
(def haifa-route
(GET "/haifa" request "hello Haifa"))
 
(haifa-route {:uri "/haifa" :request-method :get})
;; {:status 200, :headers {"Content-Type" "text/html; charset=utf-8"}, :body "hello Haifa"}
 
(haifa-route {:uri "/ibm" :request-method :get})
;; nil
 
 
(def all-routes
(routes
(GET "/haifa" _ "hello Haifa")
(GET "/yagur" _ "hello Yagur")))
 
(all-routes {:uri "/haifa" :request-method :get})
;; {:status 200, :headers {"Content-Type" "text/html; charset=utf-8"}, :body "hello Haifa"}
(all-routes {:uri "/yagur" :request-method :get})
;; {:status 200, :headers {"Content-Type" "text/html; charset=utf-8"}, :body "blue"}
(all-routes {:uri "/tel aviv" :request-method :get})
;; nil
 
(defroutes all-routes
(GET "/haifa" _ "hello Haifa")
(GET "/yagur" _ "hello Yagur"))
 
 
(require '[compojure.route :as route])
 
(defroutes all-routes
(GET "/haifa" _ "hello Haifa")
(GET "/yagur" _ "hello Yagur")
(route/not-found "sorry, no page found"))
 
(all-routes {:uri "/tel aviv" :request-method :get})
;; {:status 404, :headers {"Content-Type" "text/html; charset=utf-8"}, :body "sorry, no page found"}
 
 
;; Deconstruction
(require '[clojure.string :as str])
 
(defroutes all-routes
(GET "/:location" [location]
(str "hello " (str/capitalize location)))
(route/not-found "sorry, no page found"))
 
(all-routes {:uri "/haifa" :request-method :get})
 
(defroutes all-routes
(GET "/:location" [location]
(str "hello " (str/capitalize location)))
(GET "/:location/rev" [location]
(str "hello " (->> location
reverse
(reduce str)
str/capitalize)))
(route/not-found "sorry, no page found"))
 
(all-routes {:uri "/haifa/rev" :request-method :get})
;;{:status 200, :headers {"Content-Type" "text/html; charset=utf-8"}, :body "hello Afiah"}
 
 
(defroutes all-routes
(context "/:location" [location]
(GET "/" []
(str "hello " (str/capitalize location)))
(GET "/rev" []
(str "hello " (->> location
reverse
(reduce str)
str/capitalize))))
(route/not-found "sorry, no page found"))
 
 
(all-routes {:uri "/haifa/rev" :request-method :get})
 
;;;;; Hiccup
(use 'hiccup.core)
 
; literals:
(html "Hello, world!")
(html 1)
 
(html [:p "Hello, world!"])
(html [:h1 "Hello," " world!"]
[:p "Greetings from your computer!"])
 
(html [:div {:class "grid_8 alpha"}
[:p "Trendy grid system time"]])
 
; => "<div class=\"grid_8 alpha\">
;<p>Trendy grid system time</p></div>"
; the same html using the CSS like shortcuts:
(html [:div.grid_8.alpha
[:p "Trendy grid system time"]])
 
(html (interpose " " (range 5)))
; => "0 1 2 3 4"
(html [:ul (map (fn [name] [:li name])
["Croaker" "Raven" "Murgen" "One-Eye"])])
; "<ul><li>Croaker</li><li>Raven</li><li>Murgen</li><li>One-Eye</li></ul">
 
(use 'hiccup.page 'hiccup.form 'hiccup.element)
(defn example-elements []
(html5
[:header "elements"]
[:body
(ordered-list (map #(* 2 %) (range 1 6)))
(unordered-list (map #(* 3 %) (range 1 3)))
[:p (link-to "/index" "back")]
[:p (link-to "http://google.com" "Google")]]
))
 
(example-elements)
 
(def s (run-jetty (fn [_] (response (example-elements))) {:port 8080 :join? false}))
(.stop s)
 
(defn example-form []
(html5
[:header "form element"]
[:body
[:p (label "check" "check") (check-box "check" true) (check-box "check" false) ]
[:p (drop-down "drop" ["tzach" "yossi"] )]
[:p (drop-down "drop" (range 1 5))]
[:p
(label "radio" "radio")
(radio-button 1 false 1)
(radio-button 1 true 2)]
[:p (text-area "test" "I'm a political text")]]
))
 
(def s (run-jetty (fn [_] (response (example-form))) {:port 8080 :join? false}))
(.stop s)

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