new router implementation

router.go

@@ -0,0 +1,83 @@
+package main
+
+import (
+	"log"
+	"net/http"
+	"strings"
+)
+
+type Route struct {
+	path    []string
+	handler http.Handler
+}
+
+type Router struct {
+	routes map[string][]Route
+}
+
+func NewRouter() *Router {
+	return &Router{make(map[string][]Route)}
+}
+
+func (router *Router) Options(path string, handler http.HandlerFunc) {
+	router.Handle("OPTIONS", path, handler)
+}
+
+func (router *Router) Get(path string, handler http.HandlerFunc) {
+	router.Handle("GET", path, handler)
+}
+
+func (router *Router) Head(path string, handler http.HandlerFunc) {
+	router.Handle("HEAD", path, handler)
+}
+
+func (router *Router) Post(path string, handler http.HandlerFunc) {
+	router.Handle("POST", path, handler)
+}
+
+func (router *Router) Put(path string, handler http.HandlerFunc) {
+	router.Handle("PUT", path, handler)
+}
+
+func (router *Router) Delete(path string, handler http.HandlerFunc) {
+	router.Handle("DELETE", path, handler)
+}
+
+func (router *Router) Trace(path string, handler http.HandlerFunc) {
+	router.Handle("TRACE", path, handler)
+}
+
+func (router *Router) Connect(path string, handler http.HandlerFunc) {
+	router.Handle("Connect", path, handler)
+}
+
+func (router *Router) Handle(method string, uri string, handler http.HandlerFunc) {
+	routes := router.routes[method]
+	path := strings.Split(uri, "/")
+	routes = append(routes, Route{path, handler})
+	router.routes[method] = routes
+}
+
+func (router *Router) ServeHTTP(w http.ResponseWriter, r *http.Request) {
+	method := r.Method
+	uri := r.RequestURI
+	path := strings.Split(uri, "/")
+
+	log.Printf("%s %s", method, uri)
+
+ROUTE:
+	for _, route := range router.routes[method] {
+		if len(route.path) != len(path) {
+			continue
+		}
+		for i := 0; i < len(route.path); i++ {
+			if !strings.HasPrefix(route.path[i], ":") && route.path[i] != path[i] {
+				continue ROUTE
+			}
+		}
+		route.handler.ServeHTTP(w, r)
+		return
+	}
+
+	http.Error(w, "404 not found", 404)
+}