Implement basic ws server and client

ws-client/main.go

@@ -0,0 +1,76 @@
+package main
+
+import (
+	"log"
+	"time"
+
+	"github.com/gorilla/websocket"
+)
+
+type WSConnection struct {
+	url     string
+	conn    *websocket.Conn
+	errChan chan error
+}
+
+func (ws *WSConnection) readMessage() {
+	log.Printf("Reading messages")
+	for {
+		_, message, err := ws.conn.ReadMessage()
+		if err != nil {
+			ws.errChan <- err
+			return
+		}
+		log.Printf("Received: %s", message)
+	}
+}
+
+func (ws *WSConnection) writeMessage(message string) {
+	err := ws.conn.WriteMessage(websocket.TextMessage, []byte(message))
+	if err != nil {
+		log.Printf("Error during message writing: %v", err)
+		ws.errChan <- err
+		return
+	}
+}
+
+func (ws *WSConnection) handleError() {
+	for {
+		err := <-ws.errChan
+		log.Println("Error during message reading:", err)
+
+		time.Sleep(5 * time.Second)
+		ws.open()
+	}
+}
+
+func (ws *WSConnection) open() {
+	log.Printf("Connecting to %s", ws.url)
+	conn, _, err := websocket.DefaultDialer.Dial(ws.url, nil)
+	if err != nil {
+		log.Println("Error during connection:", err)
+		ws.errChan <- err
+		return
+	}
+	log.Printf("Connected")
+	ws.conn = conn
+	ws.errChan = make(chan error)
+	go ws.readMessage()
+	go ws.handleError()
+}
+
+func main() {
+	log.SetFlags(log.Lmicroseconds)
+
+	wsConn := WSConnection{
+		url: "ws://localhost:8080/ws",
+	}
+	wsConn.open()
+
+	ticker := time.NewTicker(time.Second)
+	defer ticker.Stop()
+
+	for timestamp := range ticker.C {
+		wsConn.writeMessage(timestamp.String())
+	}
+}