func Example() {
	// Create file watcher
	watcher, err := fsnotify.NewWatcher()
	if err != nil {
		log.Fatalln(err)
	}
	defer watcher.Close()

	// Watch dir
	err = watcher.Watch("/path/to/watched/dir")
	if err != nil {
		log.Fatalln(err)
	}

	// Start LiveReload server
	lr, err := lrserver.New(lrserver.DefaultName, lrserver.DefaultPort)
	if err != nil {
		log.Fatalln(err)
	}
	go lr.ListenAndServe()

	// Start goroutine that requests reload upon watcher event
	go func() {
		for {
			event := <-watcher.Event
			lr.Reload(event.Name)
		}
	}()

	// Start serving html
	http.HandleFunc("/", func(rw http.ResponseWriter, req *http.Request) {
		rw.Write([]byte(html))
	})
	http.ListenAndServe(":3000", nil)
}
Beispiel #2
0
func ExampleNewWatcher() {
	watcher, err := fsnotify.NewWatcher()
	if err != nil {
		log.Fatal(err)
	}

	go func() {
		for {
			select {
			case ev := <-watcher.Event:
				log.Println("event:", ev)
			case err := <-watcher.Error:
				log.Println("error:", err)
			}
		}
	}()

	err = watcher.Watch("/tmp/foo")
	if err != nil {
		log.Fatal(err)
	}
}
Beispiel #3
0
// run executes the main loop of the chatterbox daemon
func (d *Daemon) run() error {
	profile := new(proto.Profile)
	if err := persistence.UnmarshalFromFile(d.OurChatterboxProfilePath(), profile); err != nil {
		return err
	}

	ourConn, err := d.cc.DialServer(d.Dename, d.ServerAddressTCP, int(d.ServerPortTCP),
		(*[32]byte)(&d.ServerTransportPK), (*[32]byte)(&profile.UserIDAtServer),
		(*[32]byte)(&d.TransportSecretKeyForServer))
	if err != nil {
		return err
	}
	defer ourConn.Close()

	notifies := make(chan *util.EnvelopeWithId)
	replies := make(chan *proto.ServerToClient)

	connToServer := &util.ConnectionToServer{
		InBuf:        d.inBuf,
		Conn:         ourConn,
		ReadReply:    replies,
		ReadEnvelope: notifies,
	}

	go connToServer.ReceiveMessages()

	prekeyPublics, prekeySecrets, err := d.updatePrekeys(connToServer)
	if err != nil {
		return err
	}

	watcher, err := fsnotify.NewWatcher()
	if err != nil {
		return err
	}
	defer watcher.Close()

	initFn := func(path string, f os.FileInfo, err error) error {
		if f.IsDir() {
			return d.processOutboxDir(path)
		}
		return d.processOutboxDir(filepath.Dir(path))
	}

	err = WatchDir(watcher, d.OutboxDir(), initFn)
	if err != nil {
		return err
	}

	if err = util.EnablePush(connToServer); err != nil {
		return err
	}

	d.requestAllMessages(connToServer)

	for {
		select {
		case <-d.stop:
			return nil
		case ev := <-watcher.Event:
			// event in the directory structure; watch any new directories
			if _, err = os.Stat(ev.Name); err == nil {
				err = WatchDir(watcher, ev.Name, initFn)
				if err != nil {
					log.Printf("watch %s: %s", ev.Name, err) // TODO
				}
				d.processOutboxDir(ev.Name)
			}
		case envelopewithid := <-connToServer.ReadEnvelope:
			envelope := envelopewithid.Envelope
			id := envelopewithid.Id
			msgHash := sha256.Sum256(envelope)
			// assume it's the first message we're receiving from the person; try to decrypt
			message, ratch, index, err := d.decryptFirstMessage(envelope, prekeyPublics, prekeySecrets)
			if err == nil {
				// assumption was correct, found a prekey that matched
				if err := StoreRatchet(d, message.Dename, ratch); err != nil {
					return err
				}

				newPrekeyPublics := append(prekeyPublics[:index], prekeyPublics[index+1:]...)
				newPrekeySecrets := append(prekeySecrets[:index], prekeySecrets[index+1:]...)
				if err = StorePrekeys(d, newPrekeyPublics, newPrekeySecrets); err != nil {
					return err
				}
				//TODO: Update prekeys by removing index, store // is this done? What does it mean?
				if err := d.saveMessage(message); err != nil {
					return err
				}
				if err := util.DeleteMessages(connToServer, []*[32]byte{id}); err != nil {
					return err
				}
			} else { // try decrypting with a ratchet
				ratchets, err := AllRatchets(d, d.fillAuth, d.checkAuth)
				if err != nil {
					return err
				}

				// TODO: figure out what here should be atomic and comment
				if message, ratch, err := decryptMessage(envelope, ratchets); err == nil {
					if err := d.saveMessage(message); err != nil {
						return err
					}
					if err := StoreRatchet(d, message.Dename, ratch); err != nil {
						return err
					}
				} else {
					log.Printf("failed to decrypt %x: %s", msgHash, err)
				}
				if err := util.DeleteMessages(connToServer, []*[32]byte{id}); err != nil {
					return err
				}
			}
		case err := <-watcher.Error:
			if err != nil {
				return err
			}
		}
	}

}