In Go, upgrading an HTTP connection to a WebSocket connection can be done using the `golang.org/x/net/websocket` package or the popular `github.com/gorilla/websocket` package. This allows real-time, two-way communication between the server and the client. Below is an example of how to upgrade an HTTP connection to a WebSocket connection using the Gorilla WebSocket package.
package main
import (
"net/http"
"github.com/gorilla/websocket"
"log"
)
var upgrader = websocket.Upgrader{
CheckOrigin: func(r *http.Request) bool {
return true
},
}
func handleWebSocket(w http.ResponseWriter, r *http.Request) {
conn, err := upgrader.Upgrade(w, r, nil)
if err != nil {
log.Println(err)
return
}
defer conn.Close()
for {
messageType, msg, err := conn.ReadMessage()
if err != nil {
log.Println(err)
break
}
log.Printf("Received: %s", msg)
if err := conn.WriteMessage(messageType, msg); err != nil {
log.Println(err)
break
}
}
}
func main() {
http.HandleFunc("/ws", handleWebSocket)
log.Println("Server started on :8080")
if err := http.ListenAndServe(":8080", nil); err != nil {
log.Fatal("ListenAndServe:", err)
}
}
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