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[GopherJS] WebSocket Client Example With Echo Server
source link: http://siongui.github.io/2017/05/18/go-websocket-client-example-with-echo-server/
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[GopherJS] WebSocket Client Example With Echo Server
May 18, 2017
Simple example of a WebSocket client via GopherJS and Golang. Connect and send a message to the WebSocket server that echos everything from clients.
The WebSocket echo server is provided by websocket.org and the address is wss://echo.websocket.org.
Run Code on GopherJS Playground
package main
import (
"fmt"
"github.com/gopherjs/gopherjs/js"
)
func main() {
ws := js.Global.Get("WebSocket").New("wss://echo.websocket.org")
ws.Call("addEventListener", "open", func(e *js.Object) {
fmt.Println("Connection open ...")
ws.Call("send", "Hello WebSockets!")
})
ws.Call("addEventListener", "message", func(e *js.Object) {
fmt.Println("Received Message: " + e.Get("data").String())
ws.Call("close")
})
ws.Call("addEventListener", "close", func(e *js.Object) {
fmt.Println("Connection closed.")
})
}
Console output:
Connection open ... Received Message: Hello WebSockets! Connection closed.
References:
[2]JavaScript Tips and Gotchas · gopherjs/gopherjs Wiki · GitHub
[4]A VPN-server, using websockets : golang
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