reorganizing server-related packages

src/server/router/router.go

@@ -0,0 +1,73 @@
+package router
+
+import (
+	"net/http"
+	"regexp"
+	"strings"
+)
+
+type Handler func(*Context)
+
+type Router struct {
+	middle []Handler
+	routes []Route
+	base   string
+}
+
+type Route struct {
+	regex *regexp.Regexp
+	chain []Handler
+}
+
+func NewRouter(base string) *Router {
+	router := &Router{}
+	router.middle = make([]Handler, 0)
+	router.routes = make([]Route, 0)
+	router.base = base
+	return router
+}
+
+func (r *Router) Use(h Handler) {
+	r.middle = append(r.middle, h)
+}
+
+func (r *Router) For(path string, handler Handler) {
+	x := Route{}
+	x.regex = routeRegexp(path)
+	x.chain = append(r.middle, handler)
+
+	r.routes = append(r.routes, x)
+}
+
+func (r *Router) resolve(path string) *Route {
+	for _, route := range r.routes {
+		if route.regex.MatchString(path) {
+			return &route
+		}
+	}
+	return nil
+}
+
+func (r *Router) ServeHTTP(rw http.ResponseWriter, req *http.Request) {
+	// autoclose open base url
+	if r.base != "" && r.base == req.URL.Path {
+		http.Redirect(rw, req, r.base+"/", http.StatusFound)
+		return
+	}
+
+	path := strings.TrimPrefix(req.URL.Path, r.base)
+
+	route := r.resolve(path)
+	if route == nil {
+		rw.WriteHeader(http.StatusNotFound)
+		return
+	}
+
+	context := &Context{}
+	context.Req = req
+	context.Out = rw
+	context.Vars = regexGroups(path, route.regex)
+	context.index = -1
+	context.chain = route.chain
+	context.Next()
+}