Golang cors.New函数代码示例

func main() {
	// Create a REST API handler
	api := rest.New()

	// Add a resource on /users[/:user_id]
	users := api.Bind("users", rest.NewResource(user, mem.NewHandler(), rest.Conf{
		// We allow all REST methods
		// (rest.ReadWrite is a shortcut for []rest.Mode{Create, Read, Update, Delete, List})
		AllowedModes: rest.ReadWrite,
	}))

	// Bind a sub resource on /users/:user_id/posts[/:post_id]
	// and reference the user on each post using the "user" field of the posts resource.
	posts := users.Bind("posts", "user", rest.NewResource(post, mem.NewHandler(), rest.Conf{
		// Posts can only be read, created and deleted, not updated
		AllowedModes: []rest.Mode{rest.Read, rest.List, rest.Create, rest.Delete},
	}))

	// Add a friendly alias to public posts
	// (equivalent to /users/:user_id/posts?filter=public=true)
	posts.Alias("public", url.Values{"filter": []string{"public=true"}})

	// Add cors support
	h := cors.New(cors.Options{OptionsPassthrough: true}).Handler(api)

	// Bind the API under /api/ path
	http.Handle("/api/", http.StripPrefix("/api/", h))

	// Serve it
	log.Print("Serving API on http://localhost:8080")
	if err := http.ListenAndServe(":8080", nil); err != nil {
		log.Fatal(err)
	}
}

func main() {
	r := mux.NewRouter().StrictSlash(true)

	var mgoConn = os.Getenv("MGOCONN")

	if mgoConn == "" {
		log.Fatal("No connection string found.")
	}

	log.Println(mgoConn)

	db := db.NewDatabase(mgoConn, "house")

	tc := controllers.NewTransactionController(db)
	hc := controllers.NewHomeController()

	r.HandleFunc("/", hc.HomeHandler).Methods("GET")
	r.HandleFunc("/transactions", tc.GetTransactionsHandler).Methods("GET")
	r.HandleFunc("/transactions/{id}", tc.GetTransactionHandler).Methods("GET")
	r.HandleFunc("/transactions", tc.PostTransactionHandler).Methods("POST")
	http.Handle("/", r)
	log.Println("Listening on port 8080")

	c := cors.New(cors.Options{
		AllowedOrigins: []string{"*"},
	})

	handler := c.Handler(r)
	log.Fatal(http.ListenAndServe(":8080", handler))
}

func Start(pipe *xeth.XEth, config RpcConfig) error {
	if rpclistener != nil {
		if fmt.Sprintf("%s:%d", config.ListenAddress, config.ListenPort) != rpclistener.Addr().String() {
			return fmt.Errorf("RPC service already running on %s ", rpclistener.Addr().String())
		}
		return nil // RPC service already running on given host/port
	}

	l, err := newStoppableTCPListener(fmt.Sprintf("%s:%d", config.ListenAddress, config.ListenPort))
	if err != nil {
		glog.V(logger.Error).Infof("Can't listen on %s:%d: %v", config.ListenAddress, config.ListenPort, err)
		return err
	}
	rpclistener = l

	var handler http.Handler
	if len(config.CorsDomain) > 0 {
		var opts cors.Options
		opts.AllowedMethods = []string{"POST"}
		opts.AllowedOrigins = []string{config.CorsDomain}

		c := cors.New(opts)
		handler = newStoppableHandler(c.Handler(JSONRPC(pipe)), l.stop)
	} else {
		handler = newStoppableHandler(JSONRPC(pipe), l.stop)
	}

	go http.Serve(l, handler)

	return nil
}

// NewAPI instantiates a new API with a resolver. Sync determines whether to
// sync the underlying repo with a remote origin
func NewAPI(resolver Resolver) http.Handler {
	api := API{resolver: resolver}
	router := httprouter.New()
	router.GET("/", Index)
	router.POST("/token", api.tokenFn())
	router.GET("/files/*path", api.wrap(GetFile))
	router.DELETE("/files/*path", api.wrap(DeleteFile))

	router.POST("/blobs", api.wrap(CreateBlob))
	router.GET("/blobs/:sha", api.wrap(GetBlob))

	router.POST("/trees", api.wrap(CreateTree))
	router.GET("/trees/:sha", api.wrap(GetTree))

	router.POST("/commits", api.wrap(CreateCommit))
	router.GET("/commits/:sha", api.wrap(GetCommit))

	router.GET("/refs/*ref", api.wrap(GetRef))
	router.PATCH("/refs/*ref", api.wrap(UpdateRef))

	corsHandler := cors.New(cors.Options{
		AllowedMethods:   []string{"GET", "POST", "PATCH", "PUT", "DELETE"},
		AllowedHeaders:   []string{"Accept", "Authorization", "Content-Type"},
		AllowCredentials: true,
	})

	return corsHandler.Handler(router)
}

func main() {
	// middleware
	middle := interpose.New()
	middle.Use(adaptors.FromNegroni(cors.New(cors.Options{
		// CORS
		AllowedOrigins: []string{"*"},
	})))

	// router
	router := pat.New()
	middle.UseHandler(router)

	router.Get("/", http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		url := r.URL.Query().Get("url")

		if url != "" {
			encoded := imgbase64.FromRemote(url)
			fmt.Fprint(w, encoded)
		} else {
			fmt.Fprint(w, "/?url=<your-image-url> returns the base64 data-URI of that image.")
		}
	}))

	// listen
	port := os.Getenv("PORT")
	if port == "" {
		port = "5000"
	}
	log.Print("listening...")
	http.ListenAndServe(":"+port, middle)
}

func main() {
	flag.Parse()
	if *helpFlag {
		fmt.Fprintf(os.Stderr, "Usage of %s\n", os.Args[0])
		flag.PrintDefaults()
		os.Exit(1)
	}
	config := loadConfig(*configFile)

	logger := setupLogging(config.Log.File)

	mysqlDbmap := iamok.PrepareDBMap(config.MySql.ConnectionString)
	defer mysqlDbmap.Db.Close()

	mysqlDbmap.TraceOn("[gorp]", &Foo{})

	router := iamok.NewRouter()

	//Logs the http requests status
	logHandler := handlers.LoggingHandler(logger, router)
	c := cors.New(cors.Options{
		AllowedMethods: []string{"GET", "POST", "DELETE", "OPTIONS", "PUT"},
		AllowedHeaders: []string{"X-Requested-With", "Accept", "Content-Type"},
		Debug:          true,
	}) //for accepting CORS requests
	http.ListenAndServe(":8080", iamok.RecoveryHandler{Handler: c.Handler(logHandler)})
}

// Route handler for the server
func Handler() http.Handler {
	router := mux.NewRouter()

	// Set up the websocket server
	wsServer, err := socketio.NewServer(nil)
	if err != nil {
		log.Fatal(err)
	}
	wsServer.On("connection", func(so socketio.Socket) {
		log.Println("on connection")
		socket = so
	})
	router.Handle("/socket.io/", wsServer)

	// GET /clients
	// List all registered registration IDs
	router.HandleFunc("/clients", ListClients).Methods("GET")

	// POST /message
	// Send a new message
	router.HandleFunc("/message", SendMessage).Methods("POST")

	c := cors.New(cors.Options{
		AllowCredentials: true,
	})
	return c.Handler(router)
}

func main() {
	fmt.Println("Welcome to Sample bank Server:::::::")
	fmt.Println(time.Now())
	///DO db stuff
	appDb := AppDb{}
	appDb.initDb()
	appDb.initSchema()
	// appDb.createDummyData()

	c := cors.New(cors.Options{
		AllowedOrigins: []string{"http://localhost:3500"},
	})

	// c := cors.Default()
	r := mux.NewRouter().StrictSlash(false)
	accounts := r.Path("/accounts").Subrouter()
	accounts.Methods("GET").HandlerFunc(appDb.accountsHandler)
	accounts.Methods("POST").HandlerFunc(appDb.createClientsHandler)

	account := r.PathPrefix("/accounts/{id}").Subrouter()
	account.Methods("GET").HandlerFunc(appDb.accountHandler)
	account.Methods("PUT").HandlerFunc(appDb.updateAccountHandler)
	account.Methods("DELETE").HandlerFunc(appDb.deleteHandler)

	http.ListenAndServe(":8050", c.Handler(r))
}

func (self *API) Serve() error {
	self.router = httprouter.New()

	if err := self.loadRoutes(); err != nil {
		return err
	}

	go func() {
		dc := diecast.NewServer()
		dc.Address = self.Address
		dc.Port = self.Port + 1
		dc.LogLevel = `debug`

		if err := dc.Initialize(); err == nil {
			dc.Serve()
		}
	}()

	self.cors = cors.New(cors.Options{
		AllowedOrigins: []string{`*`},
		AllowedHeaders: []string{`*`},
	})

	self.server = negroni.New()
	self.server.Use(negroni.NewRecovery())
	self.server.Use(self.cors)
	self.server.UseHandler(self.router)

	self.server.Run(fmt.Sprintf("%s:%d", self.Address, self.Port))

	return nil
}

func (s *Server) Start() error {
	n := negroni.New()
	n.Use(cors.New(cors.Options{
		AllowCredentials: true,
	}))
	/*
		n.Use(&rest.CorsMiddleware{
			RejectNonCorsRequests: false,
			OriginValidator: func(origin string, request *rest.Request) bool {
				return true
			},
			AllowedMethods: []string{"GET", "POST"},
			AllowedHeaders: []string{
				"Accept", "Content-Type", "X-Custom-Header", "Origin"},
			AccessControlAllowCredentials: true,
			AccessControlMaxAge:           3600,
		})
	*/
	n.Use(negroni.NewRecovery())
	n.Use(NewLogger())
	n.UseFunc(s.Auth.LoginRequired)
	n.UseHandler(s.Api.Handler())

	s.server = &graceful.Server{
		Timeout: 10 * time.Second,
		Server: &http.Server{
			Addr:    s.Config.BindAddress,
			Handler: n,
		},
	}

	s.listenAndGoServe()

	return nil
}

func StartHttp(cfg HttpConfig, codec codec.Codec, api shared.EthereumApi) error {
	if httpListener != nil {
		if fmt.Sprintf("%s:%d", cfg.ListenAddress, cfg.ListenPort) != httpListener.Addr().String() {
			return fmt.Errorf("RPC service already running on %s ", httpListener.Addr().String())
		}
		return nil // RPC service already running on given host/port
	}

	l, err := newStoppableTCPListener(fmt.Sprintf("%s:%d", cfg.ListenAddress, cfg.ListenPort))
	if err != nil {
		glog.V(logger.Error).Infof("Can't listen on %s:%d: %v", cfg.ListenAddress, cfg.ListenPort, err)
		return err
	}
	httpListener = l

	var handler http.Handler
	if len(cfg.CorsDomain) > 0 {
		var opts cors.Options
		opts.AllowedMethods = []string{"POST"}
		opts.AllowedOrigins = strings.Split(cfg.CorsDomain, " ")

		c := cors.New(opts)
		handler = newStoppableHandler(c.Handler(gethHttpHandler(codec, api)), l.stop)
	} else {
		handler = newStoppableHandler(gethHttpHandler(codec, api), l.stop)
	}

	go http.Serve(l, handler)

	return nil
}

// The main routine is going the "entry" point.
func main() {
	// Create a new router.
	router := mux.NewRouter()

	// RESTful defines operations
	// * GET for fetching data
	// * POST for inserting data
	// * PUT for updating existing data
	// * DELETE for deleting data
	router.HandleFunc("/contacts", ListContacts(MyContacts)).Methods("GET")
	router.HandleFunc("/contacts/{id}", UpdateContact(MyContacts)).Methods("PUT")

	// The info endpoint is for showing demonstration purposes only and is not subject to any task.
	router.HandleFunc("/info", InfoHandler).Methods("GET")

	// Print where to point the browser at.
	fmt.Printf("Listening on %s\n", "http://localhost:5678")

	// Cross origin resource requests
	c := cors.New(cors.Options{
		AllowedOrigins: []string{"*"},
		AllowedMethods: []string{"GET", "POST", "DELETE", "PUT"}},
	)

	// Start up the server and check for errors.
	listenOn := fmt.Sprintf("%s:%s", envHost, envPort)
	err := http.ListenAndServe(listenOn, c.Handler(router))
	if err != nil {
		log.Fatalf("Could not set up server because %s", err)
	}
}

// RunServer starts vertice httpd server.
func NewNegHandler() *negroni.Negroni {
	c := cors.New(cors.Options{
		AllowedOrigins: []string{"*"},
	})

	m := &delayedRouter{}
	for _, handler := range megdHandlerList {
		m.Add(handler.method, handler.path, handler.h)
	}

	m.Add("Get", "/", Handler(index))
	m.Add("Get", "/logs", Handler(logs))
	m.Add("Get", "/ping", Handler(ping))
	//we can use this as a single click Terminal launch for docker.
	//m.Add("Get", "/apps/{appname}/shell", websocket.Handler(remoteShellHandler))
	n := negroni.New()
	n.Use(negroni.NewRecovery())
	n.Use(c)
	n.Use(newLoggerMiddleware())
	n.UseHandler(m)
	n.Use(negroni.HandlerFunc(contextClearerMiddleware))
	n.Use(negroni.HandlerFunc(flushingWriterMiddleware))
	n.Use(negroni.HandlerFunc(errorHandlingMiddleware))
	n.Use(negroni.HandlerFunc(authTokenMiddleware))
	n.UseHandler(http.HandlerFunc(runDelayedHandler))
	return n
}

func main() {
	log.SetFlags(log.LstdFlags | log.Lshortfile)

	flag.Parse()

	// Connect to RethinkDB
	var err error
	session, err = r.Connect(r.ConnectOpts{
		Address: *rethinkAddress,
	})
	if err != nil {
		log.Fatal(err)
	}

	// Create the database and tables
	r.DbCreate(*rethinkName).Exec(session)
	r.Db(*rethinkName).TableCreate("invites").Exec(session)
	r.Db(*rethinkName).Table("invites").IndexCreate("email").Exec(session)
	r.Db(*rethinkName).Table("invites").IndexCreate("name").Exec(session)

	// Add a CORS middleware
	goji.Use(cors.New(cors.Options{
		AllowCredentials: true,
	}).Handler)

	// Add routes to goji
	goji.Get("/", index)
	goji.Post("/check", check)
	goji.Post("/free", free)
	goji.Post("/create", create)

	// Start the server
	goji.Serve()
}

func Example() {
	session, err := mgo.Dial("")
	if err != nil {
		log.Fatalf("Can't connect to MongoDB: %s", err)
	}
	db := "test_rest_layer"

	index := resource.NewIndex()

	users := index.Bind("users", user, mongo.NewHandler(session, db, "users"), resource.Conf{
		AllowedModes: resource.ReadWrite,
	})

	users.Bind("posts", "user", post, mongo.NewHandler(session, db, "posts"), resource.Conf{
		AllowedModes: resource.ReadWrite,
	})

	api, err := rest.NewHandler(index)
	if err != nil {
		log.Fatalf("Invalid API configuration: %s", err)
	}

	http.Handle("/", cors.New(cors.Options{OptionsPassthrough: true}).Handler(api))

	log.Print("Serving API on http://localhost:8080")
	if err := http.ListenAndServe(":8080", nil); err != nil {
		log.Fatal(err)
	}
}