forked from timmathews/argo
/
conn.go
85 lines (71 loc) · 1.6 KB
/
conn.go
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package main
import (
"fmt"
"github.com/gorilla/websocket"
"log"
"net/http"
"time"
)
const (
// Time allowed to write a message to a receiver
writeWait = 10 * time.Second
// Time allowed to read pong from a receiver
pongWait = 60 * time.Second
// Send pings to receivers
pingPeriod = 56 * time.Second
// Max message size
maxMessageSize = 512
)
type connection struct {
ws *websocket.Conn
send chan []byte
}
func (c *connection) write(mt int, payload []byte) error {
c.ws.SetWriteDeadline(time.Now().Add(writeWait))
return c.ws.WriteMessage(mt, payload)
}
func (c *connection) writePump() {
ticker := time.NewTicker(pingPeriod)
defer func() {
ticker.Stop()
c.ws.Close()
}()
for {
select {
case message, ok := <-c.send:
if !ok {
c.write(websocket.CloseMessage, []byte{})
return
}
if err := c.write(websocket.TextMessage, message); err != nil {
return
}
case <-ticker.C:
if err := c.write(websocket.PingMessage, []byte{}); err != nil {
return
}
}
}
}
func serveWs(w http.ResponseWriter, r *http.Request) {
if r.Method != "GET" {
http.Error(w, "Method not allowed", 405)
return
}
// TODO: Add origin check / CORS support
ws, err := websocket.Upgrade(w, r, nil, 1024, 1024)
if _, ok := err.(websocket.HandshakeError); ok {
http.Error(w, "Not a websocket handshake", 400)
return
} else if err != nil {
log.Println(err)
return
}
if r.URL.Path == "/ws/v1/data" {
c := &connection{send: make(chan []byte, 256), ws: ws}
h.register <- c
go c.writePump()
} else if r.URL.Path == "/ws/v1/control" {
fmt.Println("Got registration")
}
}