Websocket Implementation for Tile38 with Golang
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
package main | |
import ( | |
"flag" | |
"github.com/gorilla/websocket" | |
"log" | |
"net/url" | |
"os" | |
"os/signal" | |
"time" | |
) | |
var addr = flag.String("addr", "localhost:9851", "http service address") | |
func main() { | |
flag.Parse() | |
log.SetFlags(0) | |
interrupt := make(chan os.Signal, 1) | |
signal.Notify(interrupt, os.Interrupt) | |
u := url.URL{Scheme: "ws", Host: *addr, Path: "/subscribe+warehouse"} | |
log.Printf("connecting to %s", u.String()) | |
c, _, err := websocket.DefaultDialer.Dial(u.String(), nil) | |
if err != nil { | |
log.Fatal("dial:", err) | |
} | |
defer c.Close() | |
done := make(chan struct{}) | |
go func() { | |
defer close(done) | |
for { | |
_, message, err := c.ReadMessage() | |
if err != nil { | |
log.Println("read:", err) | |
return | |
} | |
log.Printf("recv: %s", message) | |
} | |
}() | |
ticker := time.NewTicker(time.Second) | |
defer ticker.Stop() | |
for { | |
select { | |
case <-done: | |
return | |
case t := <-ticker.C: | |
err := c.WriteMessage(websocket.TextMessage, []byte(t.String())) | |
if err != nil { | |
log.Println("write:", err) | |
return | |
} | |
case <-interrupt: | |
log.Println("interrupt") | |
// Cleanly close the connection by sending a close message and then | |
// waiting (with timeout) for the server to close the connection. | |
err := c.WriteMessage(websocket.CloseMessage, websocket.FormatCloseMessage(websocket.CloseNormalClosure, "")) | |
if err != nil { | |
log.Println("write close:", err) | |
return | |
} | |
select { | |
case <-done: | |
case <-time.After(time.Second): | |
} | |
return | |
} | |
} | |
} |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment