91 lines
1.5 KiB
Go
91 lines
1.5 KiB
Go
package api
|
|
|
|
import (
|
|
"net/http"
|
|
|
|
"github.com/gorilla/websocket"
|
|
)
|
|
|
|
var upgrader = websocket.Upgrader{
|
|
ReadBufferSize: 1024,
|
|
WriteBufferSize: 1024,
|
|
CheckOrigin: func(r *http.Request) bool {
|
|
return true
|
|
},
|
|
}
|
|
|
|
type Client struct {
|
|
socket *websocket.Conn
|
|
send chan []byte
|
|
manager *Manager
|
|
}
|
|
|
|
type Manager struct {
|
|
clients map[*Client]bool
|
|
broadcast chan []byte
|
|
register chan *Client
|
|
unregister chan *Client
|
|
}
|
|
|
|
func NewManager() *Manager {
|
|
return &Manager{
|
|
clients: make(map[*Client]bool),
|
|
broadcast: make(chan []byte),
|
|
register: make(chan *Client),
|
|
unregister: make(chan *Client),
|
|
}
|
|
}
|
|
|
|
func (man *Manager) start() {
|
|
for {
|
|
select {
|
|
// new connection
|
|
case conn := <-man.register:
|
|
man.clients[conn] = true
|
|
|
|
// connection closed
|
|
case conn := <-man.unregister:
|
|
if _, ok := man.clients[conn]; ok {
|
|
close(conn.send)
|
|
delete(man.clients, conn)
|
|
}
|
|
|
|
// broadcast a message to all connected clients
|
|
case message := <-man.broadcast:
|
|
for client := range man.clients {
|
|
select {
|
|
case client.send <- message:
|
|
default:
|
|
man.unregister <- client
|
|
}
|
|
}
|
|
}
|
|
|
|
}
|
|
}
|
|
|
|
func (c *Client) writer() {
|
|
|
|
defer func() {
|
|
_ = c.socket.Close()
|
|
}()
|
|
|
|
for {
|
|
select {
|
|
case message, ok := <-c.send:
|
|
if !ok {
|
|
_ = c.socket.WriteMessage(websocket.CloseMessage, []byte{})
|
|
c.manager.unregister <- c
|
|
return
|
|
}
|
|
|
|
err := c.socket.WriteMessage(websocket.TextMessage, message)
|
|
if err != nil {
|
|
c.manager.unregister <- c
|
|
return
|
|
}
|
|
}
|
|
}
|
|
|
|
}
|