/
hub.go
104 lines (82 loc) · 1.54 KB
/
hub.go
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// Copyright 2014 The Yxorp Authors. All rights reserved.
package main
import (
"net/http"
"time"
"github.com/gorilla/websocket"
)
type Hub struct {
Conns map[*websocket.Conn]bool
chAdd chan *websocket.Conn
chDel chan *websocket.Conn
chMsg chan interface{}
}
func NewHub() *Hub {
h := &Hub{
Conns: make(map[*websocket.Conn]bool),
chAdd: make(chan *websocket.Conn, 8),
chDel: make(chan *websocket.Conn, 8),
chMsg: make(chan interface{}, 8),
}
go func() {
for {
select {
case c := <-h.chAdd:
h.Conns[c] = true
case c := <-h.chDel:
delete(h.Conns, c)
case v := <-h.chMsg:
for c := range h.Conns {
c.WriteJSON(v)
}
}
}
}()
return h
}
func (h *Hub) Add(c *websocket.Conn) {
h.chAdd <- c
c.SetPongHandler(func(string) error {
c.SetReadDeadline(time.Now().Add(5 * time.Second))
return nil
})
go func() {
defer func() {
h.chDel <- c
c.Close()
}()
for {
_, _, err := c.ReadMessage()
if err != nil {
return
}
}
}()
go func() {
defer func() {
c.Close()
}()
for {
<-time.After(3 * time.Second)
err := c.WriteMessage(websocket.PingMessage, nil)
if err != nil {
return
}
}
}()
}
func (h *Hub) Send(v interface{}) {
h.chMsg <- v
}
var hub = NewHub()
func handleConnect(w http.ResponseWriter, r *http.Request) {
conn, err := websocket.Upgrade(w, r, nil, 1024, 1024)
if _, ok := err.(websocket.HandshakeError); ok {
http.Error(w, "", 400)
return
}
catch(err)
hub.Add(conn)
err = conn.WriteJSON([]interface{}{"HELO"})
catch(err)
}