/
main.go
91 lines (74 loc) · 1.95 KB
/
main.go
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package main
import (
"context"
"log"
"net/http"
"os"
"os/signal"
"time"
"github.com/gorilla/mux"
"github.com/gorilla/websocket"
)
var address = ":9090"
var upgrader = websocket.Upgrader{
ReadBufferSize: 1024,
WriteBufferSize: 1024,
}
func reader(connection *websocket.Conn) {
for {
messageType, messageBytes, err := connection.ReadMessage()
if err != nil {
log.Println(err)
return
}
log.Println(string(messageBytes))
if err := connection.WriteMessage(messageType, messageBytes); err != nil {
log.Println(err)
return
}
}
}
func wsEndpoint(w http.ResponseWriter, r *http.Request) {
// allow any connection to ws endpoint... TODO: fix
upgrader.CheckOrigin = func(r *http.Request) bool { return true }
websocket, err := upgrader.Upgrade(w, r, nil)
if err != nil {
log.Println(err)
}
log.Println("Client successfully connected to WebSocket...")
reader(websocket)
}
func main() {
logger := log.New(os.Stdout, "notifications ", log.LstdFlags)
router := mux.NewRouter()
router.HandleFunc("/", wsEndpoint)
// create a new server
server := http.Server{
Addr: address,
Handler: router,
ErrorLog: logger,
ReadTimeout: 5 * time.Second,
WriteTimeout: 10 * time.Second,
IdleTimeout: 120 * time.Second, // keeps the connection open for specified time
}
// start the server
go func() {
logger.Println("Starting server on port", address)
err := server.ListenAndServe()
if err != nil {
logger.Printf("Error starting server: %s\n", err)
os.Exit(1)
}
}()
// gracefully shutdown the server and catch interrupt or kill
c := make(chan os.Signal, 1)
signal.Notify(c, os.Interrupt)
signal.Notify(c, os.Kill)
// block until signal is received
sig := <-c
log.Println("Got signal:", sig)
// gracefully shutdown the server, waiting max 30 seconds for current operations to complete
ctx, cancel := context.WithTimeout(context.Background(), 30*time.Second)
defer cancel()
server.Shutdown(ctx)
}