func publisher(chTrigger chan int, chTime chan time.Time, url, origin, connectMessage, subscribeMessage, publishMessage string) {
var err error
var ws *websocket.Conn
for {
ws, err = websocket.Dial(url, "", origin)
if err != nil {
time.Sleep(50 * time.Millisecond)
continue
}
break
}
var msg = make([]byte, 512)
if _, err := ws.Write([]byte(connectMessage)); err != nil {
fmt.Println("publisher connect write error")
log.Fatal(err)
}
if _, err = ws.Read(msg); err != nil {
fmt.Println("publisher connect read error")
log.Fatal(err)
}
if _, err := ws.Write([]byte(subscribeMessage)); err != nil {
fmt.Println("publisher subscribe write error")
log.Fatal(err)
}
if _, err = ws.Read(msg); err != nil {
fmt.Println("publisher subscribe read error")
log.Fatal(err)
}
for {
<-chTrigger
if _, err := ws.Write([]byte(publishMessage)); err != nil {
fmt.Println("publisher publish write error")
log.Fatal(err)
}
chTime <- time.Now()
if _, err = ws.Read(msg); err != nil {
fmt.Println("publisher publish read error")
log.Fatal(err)
}
if _, err = ws.Read(msg); err != nil {
fmt.Println("publisher message read error")
log.Fatal(err)
}
}
}
// This example demonstrates a trivial client.
func ExampleDial() {
origin := "http://localhost/"
url := "ws://localhost:12345/ws"
ws, err := websocket.Dial(url, "", origin)
if err != nil {
log.Fatal(err)
}
if _, err := ws.Write([]byte("hello, world!\n")); err != nil {
log.Fatal(err)
}
var msg = make([]byte, 512)
var n int
if n, err = ws.Read(msg); err != nil {
log.Fatal(err)
}
fmt.Printf("Received: %s.\n", msg[:n])
}
func subscriber(numChannels int, chSub chan struct{}, url, origin, connectMessage string) {
var err error
var ws *websocket.Conn
for {
ws, err = websocket.Dial(url, "", origin)
if err != nil {
time.Sleep(10 * time.Millisecond)
continue
}
break
}
if _, err := ws.Write([]byte(connectMessage)); err != nil {
fmt.Println("subscriber connect write error")
log.Fatal(err)
}
var msg = make([]byte, 512)
if _, err = ws.Read(msg); err != nil {
fmt.Println("subscriber connect read error")
log.Fatal(err)
}
for i := 1; i <= numChannels; i++ {
channel := fmt.Sprintf("channel%d", i)
subscribeMessage := "{\"params\": {\"channel\": \"" + channel + "\"}, \"method\": \"subscribe\"}"
if _, err := ws.Write([]byte(subscribeMessage)); err != nil {
fmt.Println("subscriber subscribe write error")
log.Fatal(err)
}
if _, err = ws.Read(msg); err != nil {
fmt.Println("subscriber subscribe read error")
log.Fatal(err)
}
}
close(chSub)
for {
if _, err = ws.Read(msg); err != nil {
fmt.Println("subscriber msg read error")
log.Fatal(err)
}
}
}
func subscriber(chSub, chMsg, chStart chan int, url, origin, connectMessage, subscribeMessage, publishMessage string) {
var err error
var ws *websocket.Conn
for {
ws, err = websocket.Dial(url, "", origin)
if err != nil {
time.Sleep(10 * time.Millisecond)
continue
}
break
}
if _, err := ws.Write([]byte(connectMessage)); err != nil {
fmt.Println("subscriber connect write error")
log.Fatal(err)
}
var msg = make([]byte, 512)
if _, err = ws.Read(msg); err != nil {
fmt.Println("subscriber connect read error")
log.Fatal(err)
}
if _, err := ws.Write([]byte(subscribeMessage)); err != nil {
fmt.Println("subscriber subscribe write error")
log.Fatal(err)
}
if _, err = ws.Read(msg); err != nil {
fmt.Println("subscriber subscribe read error")
log.Fatal(err)
}
chSub <- 1
for {
if _, err = ws.Read(msg); err != nil {
fmt.Println("subscriber msg read error")
log.Fatal(err)
}
//fmt.Println("message received")
chMsg <- 1
}
}
