|
|
package wrouter
import ( "fmt" "net/http" "strings" "time"
"git.aiterp.net/gisle/wrouter/auth" )
// Route is an interface for a request handler.
type Route interface { Handle(path string, w http.ResponseWriter, req *http.Request, user *auth.User) bool }
// Router is the main structure of the wrouter package. It routes requests to the appropriate
// Route
type Router struct { paths map[Route]string routes []Route }
// Mount a router to the router, prefixing all the paths of it
func (router *Router) Mount(path string, subRouter *Router) { for _, route := range subRouter.routes { router.Route(strings.Replace(path+subRouter.paths[route], "//", "/", 1), route) } }
// Route mounts a route interface to a path
func (router *Router) Route(path string, route Route) { if router.paths == nil { router.paths = make(map[Route]string, 16) }
router.paths[route] = path router.routes = append(router.routes, route) }
// ServeHTTP serves a HTTP request using the router's routes
func (router *Router) ServeHTTP(w http.ResponseWriter, req *http.Request) { req.ParseForm() defer req.Body.Close()
// Allow REST for clients of yore
if req.Header.Get("X-Method") != "" { req.Method = strings.ToUpper(req.Header.Get("X-Method")) }
// Resolve session cookies
var user *auth.User var sess *auth.Session cookie, err := req.Cookie(auth.SessionCookieName)
if cookie != nil && err == nil { sess = auth.FindSession(cookie.Value) if sess != nil { user, _ = auth.FindUser(sess.UserID) } }
for index, route := range router.routes { path := router.paths[route]
if strings.HasPrefix(strings.ToLower(req.URL.Path), path) { // Just so the handler can replace the path properly in case of case
// insensitive clients getting fancy on it.
path = req.URL.Path[:len(path)]
// Attach a little something for testing
w.Header().Set("X-Route-Path", path) w.Header().Set("X-Route-Index", fmt.Sprint(index))
if route.Handle(path, w, req, user) { if user != nil && user.LoggedOut() { auth.CloseSession(sess.ID) }
return } } }
w.Header().Set("Content-Type", "text/plain; charset=utf-8") w.WriteHeader(404) w.Write([]byte("Not Found: " + req.URL.Path)) }
// Resource is a shorthand for creating and adding a new REST resource to the router
func (router *Router) Resource(mount string, list, create ResourceFunc, get, update, delete ResourceIDFunc) { router.Route(mount, NewResource(list, create, get, update, delete)) }
// Static is a shorthand for creating a static file server on the following path
func (router *Router) Static(mount string, filePath string) { router.Route(mount, NewStatic(filePath)) }
// Function creates a simple bare-bones handler that just runs a function, prevents
// the need for dummy interfaces
func (router *Router) Function(mount string, function FunctionHandlerFunc) { router.Route(mount, &functionHandler{function}) }
// Listen creates a http.Server with some sane defaults and pointing to this structure
// for request handling.
func (router *Router) Listen(host string, port int) (*http.Server, error) { srv := &http.Server{ Addr: fmt.Sprintf("%s:%d", host, port), ReadTimeout: 5 * time.Second, WriteTimeout: 10 * time.Second, IdleTimeout: 120 * time.Second, Handler: router, }
return srv, srv.ListenAndServe() }
|