99 lines
2.1 KiB
Go
99 lines
2.1 KiB
Go
package websocket
|
|
|
|
import (
|
|
"log"
|
|
"time"
|
|
|
|
"github.com/google/uuid"
|
|
|
|
"github.com/gorilla/websocket"
|
|
)
|
|
|
|
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 = 1024
|
|
)
|
|
|
|
func NewClient(conn *websocket.Conn, hub *Hub) (*Client, error) {
|
|
clientID := uuid.New()
|
|
return &Client{
|
|
id: clientID.String(),
|
|
conn: conn,
|
|
hub: hub,
|
|
send: make(chan []byte, 100),
|
|
}, nil
|
|
}
|
|
|
|
type Client struct {
|
|
id string
|
|
conn *websocket.Conn
|
|
// Buffered channel of outbound messages.
|
|
send chan []byte
|
|
|
|
hub *Hub
|
|
}
|
|
|
|
func (c *Client) Go() {
|
|
go c.clientReader()
|
|
go c.clientWriter()
|
|
}
|
|
|
|
// clientReader waits for options changes from the client. The client can at any time
|
|
// change the log level and binary name it watches.
|
|
func (c *Client) clientReader() {
|
|
defer func() {
|
|
c.hub.unregister <- c
|
|
c.conn.Close()
|
|
}()
|
|
c.conn.SetReadLimit(maxMessageSize)
|
|
c.conn.SetReadDeadline(time.Now().Add(pongWait))
|
|
c.conn.SetPongHandler(func(string) error { c.conn.SetReadDeadline(time.Now().Add(pongWait)); return nil })
|
|
for {
|
|
mt, _, err := c.conn.ReadMessage()
|
|
if err != nil {
|
|
break
|
|
}
|
|
if mt == websocket.CloseMessage {
|
|
break
|
|
}
|
|
}
|
|
}
|
|
|
|
// clientWriter
|
|
func (c *Client) clientWriter() {
|
|
ticker := time.NewTicker(pingPeriod)
|
|
defer func() {
|
|
ticker.Stop()
|
|
c.conn.Close()
|
|
}()
|
|
for {
|
|
select {
|
|
case message, ok := <-c.send:
|
|
c.conn.SetWriteDeadline(time.Now().Add(writeWait))
|
|
if !ok {
|
|
// The hub closed the channel.
|
|
c.conn.WriteMessage(websocket.CloseMessage, []byte{})
|
|
return
|
|
}
|
|
|
|
if err := c.conn.WriteMessage(websocket.TextMessage, message); err != nil {
|
|
log.Printf("error sending message: %v", err)
|
|
return
|
|
}
|
|
case <-ticker.C:
|
|
c.conn.SetWriteDeadline(time.Now().Add(writeWait))
|
|
if err := c.conn.WriteMessage(websocket.PingMessage, nil); err != nil {
|
|
return
|
|
}
|
|
}
|
|
}
|
|
}
|