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client.go
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client.go
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package server
import (
"time"
"github.com/gorilla/websocket"
"github.com/sirupsen/logrus"
"github.com/tmitchel/sidebar"
)
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
)
type client struct {
conn *websocket.Conn
send chan sidebar.WebsocketMessage
hub *chathub
User sidebar.User
}
// readPump listens for messages on the Websocket connection and
// send them to the chathub for broadcasting.
func (c *client) readPump() {
defer func() {
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 {
// var msg sidebar.ChatMessage
// if err := c.conn.ReadJSON(&msg); err != nil {
// if websocket.IsCloseError(err, websocket.CloseNormalClosure, websocket.CloseNoStatusReceived, websocket.CloseGoingAway) {
// logrus.Error("websocket closed by client")
// } else {
// logrus.Errorf("websocket error %v", err)
// }
// return
// }
// storedMsg, err := c.hub.db.CreateMessage(&msg)
// if err != nil {
// logrus.Errorf("error storing message %v", err)
// }
// if storedMsg != nil {
// c.hub.broadcast <- *storedMsg
// }
// }
}
// writePump listens for the chathub to broadcast a message then
// sends it out on the Websocket connection.
func (c *client) writePump() {
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 {
c.conn.WriteMessage(websocket.CloseMessage, []byte{})
}
if err := c.conn.WriteJSON(message); err != nil {
logrus.Errorf("Error writing to websocket %v", err)
}
case <-ticker.C:
c.conn.SetWriteDeadline(time.Now().Add(writeWait))
if err := c.conn.WriteMessage(websocket.PingMessage, nil); err != nil {
logrus.Errorf("Error writing ping message. %v", err)
return
}
}
}
}