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wshub.go
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wshub.go
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package main
import (
"fmt"
"time"
"github.com/gorilla/websocket"
"github.com/zignig/cohort/world"
)
// player hub
type hub struct {
// Registered connections.
connections map[*connection]bool
// Inbound messages from the connections.
broadcast chan []byte
// Register requests from the connections.
register chan *connection
// Unregister requests from connections.
unregister chan *connection
world *world.World
}
// readPump pumps messages from the websocket connection to the hub.
func (c *connection) readPump() {
defer func() {
u.h.unregister <- c
c.ws.Close()
}()
//
c.ws.SetReadLimit(maxMessageSize)
c.ws.SetReadDeadline(time.Now().Add(pongWait))
c.ws.SetPongHandler(func(string) error { c.ws.SetReadDeadline(time.Now().Add(pongWait)); return nil })
for {
_, message, err := c.ws.ReadMessage()
if err != nil {
break
}
// push the data into the player object
c.play.InMess <- message
//h.broadcast <- message
}
}
// write writes a message with the given message type and payload.
func (c *connection) write(mt int, payload []byte) error {
c.ws.SetWriteDeadline(time.Now().Add(writeWait))
return c.ws.WriteMessage(mt, payload)
}
const (
// Time allowed to write a message to the peer.
writeWait = 10 * time.Second
// Time allowed to read the next pong message from the peer.
pongWait = 60 * time.Second
// Send pings to peer with this period. Must be less than pongWait.
pingPeriod = (pongWait * 9) / 10
// Maximum message size allowed from peer.
maxMessageSize = 512
)
// writePump pumps messages from the hub to the websocket connection.
func (c *connection) writePump() {
ticker := time.NewTicker(pingPeriod)
defer func() {
ticker.Stop()
c.ws.Close()
}()
for {
select {
case message := <-c.play.OutMess:
if err := c.write(websocket.TextMessage, message); err != nil {
return
}
case message, ok := <-c.send:
if !ok {
c.write(websocket.CloseMessage, []byte{})
return
}
if err := c.write(websocket.TextMessage, message); err != nil {
return
}
case <-ticker.C:
if err := c.write(websocket.PingMessage, []byte{}); err != nil {
return
}
}
}
}
// lifted from The Gorilla WebSocket Authors. All rights reserved.
type connection struct {
// The websocket connection.
ws *websocket.Conn
play *world.Player
// Buffered channel of outbound messages.
send chan []byte
}
func NewConnection(h *hub, conn *websocket.Conn) (c *connection) {
c = &connection{send: make(chan []byte, 256), ws: conn}
newPlayer := h.world.NewPlayer()
c.play = newPlayer
// start the player gorouting
go newPlayer.Run()
return c
}
func NewHub(w *world.World) (h *hub) {
h = &hub{}
h.broadcast = make(chan []byte)
h.register = make(chan *connection)
h.unregister = make(chan *connection)
h.connections = make(map[*connection]bool)
h.world = w
return h
}
func (h *hub) run() {
for {
select {
case c := <-h.register:
fmt.Println("new connection")
h.connections[c] = true
c.send <- []byte("load")
case c := <-h.unregister:
if _, ok := h.connections[c]; ok {
c.play.Closer <- true
delete(h.connections, c)
close(c.send)
}
//case m := <-h.broadcast:
//fmt.Println(string(m))
//for c := range h.connections {
// select {
// case c.send <- m:
// default:
// close(c.send)
// delete(h.connections, c)
// }
//}
}
}
}