/
hub.go
165 lines (138 loc) · 3.1 KB
/
hub.go
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package stream
import (
"github.com/gorilla/websocket"
"io/ioutil"
"os"
"os/signal"
"sync"
"time"
)
const (
writeWait = 10 * time.Second
maxMessageSize = 512
pongWait = 60 * time.Second
pingPeriod = (pongWait * 9) / 10
)
type Hub struct {
sessions map[*Client]bool
subscribers map[string]func(client *Client, msg Message)
sync.Mutex
broadcast chan []byte
interrupt chan os.Signal
}
func NewHub() *Hub {
interrupt := make(chan os.Signal, 1)
signal.Notify(interrupt, os.Interrupt)
hub := &Hub{
sessions: make(map[*Client]bool),
broadcast: make(chan []byte, maxMessageSize),
subscribers: make(map[string]func(client *Client, msg Message)),
interrupt: interrupt,
}
go hub.Run()
return hub
}
func (h *Hub) AddClient(client *Client) {
defer func() {
delete(h.sessions, client)
log.Infof("websocket session from ip: %s closed", client.Ip)
}()
h.sessions[client] = true
switch client.ConnType {
//case SOCKJS:
// log.Infof("new sockjs session established, from ip: %s", client.Ip)
//
// for {
// if msg, err := client.Session.Recv(); err == nil {
// h.Recv(client, []byte(msg))
// continue
// }
// break
// }
case WEBSOCK:
log.Infof("new websocket xsession established, from ip: %s", client.Ip)
//client.Connect.SetReadLimit(maxMessageSize)
client.Connect.SetReadDeadline(time.Now().Add(pongWait))
client.Connect.SetPongHandler(func(string) error {
client.Connect.SetReadDeadline(time.Now().Add(pongWait));
return nil
})
for {
op, r, err := client.Connect.NextReader()
if err != nil {
break
}
switch op {
case websocket.TextMessage:
message, err := ioutil.ReadAll(r)
if err != nil {
break
}
h.Recv(client, message)
}
}
default:
log.Warningf("unknown conn type %s", client.ConnType)
}
}
func (h *Hub) Run() {
for {
select {
case m := <-h.broadcast:
for client := range h.sessions {
client.Send <- m
}
case <-h.interrupt:
//fmt.Println("Close websocket client session")
for client := range h.sessions {
client.Close()
delete(h.sessions, client)
}
}
}
}
func (h *Hub) Recv(client *Client, b []byte) {
//fmt.Printf("client(%v), message(%v)\n", client, string(b))
msg, err := NewMessage(b)
if err != nil {
log.Error(err.Error())
return
}
switch msg.Command {
case "client_info":
client.UpdateInfo(msg)
default:
for command, f := range h.subscribers {
if msg.Command == command {
f(client, msg)
}
}
}
}
func (h *Hub) Send(client *Client, message []byte) {
client.Send <- message
}
func (h *Hub) Broadcast(message []byte) {
h.Lock()
h.broadcast <- message
h.Unlock()
}
func (h *Hub) Clients() (clients []*Client) {
clients = []*Client{}
for c := range h.sessions {
clients = append(clients, c)
}
return
}
func (h *Hub) Subscribe(command string, f func(client *Client, msg Message)) {
log.Infof("subscribe %s", command)
if h.subscribers[command] != nil {
delete(h.subscribers, command)
}
h.subscribers[command] = f
}
func (h *Hub) UnSubscribe(command string) {
if h.subscribers[command] != nil {
delete(h.subscribers, command)
}
}