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server.go
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server.go
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/*
Example nexus WAMP router that handles websockets (with/out TLS), TCP
rawsockets (with/out TLS), and unix rawsockets.
*/
package main
import (
"log"
"os"
"os/signal"
"path"
"time"
"github.com/gammazero/nexus/router"
"github.com/gammazero/nexus/wamp"
)
const (
wsAddr = "127.0.0.1:8000"
tcpAddr = "127.0.0.1:8001"
wsAddrTLS = "127.0.0.1:8100"
tcpAddrTLS = "127.0.0.1:8101"
unixAddr = "/tmp/exmpl_nexus_sock"
certFile = "cert.pem"
keyFile = "rsakey.pem"
)
func main() {
// Create router instance.
routerConfig := &router.Config{
RealmConfigs: []*router.RealmConfig{
&router.RealmConfig{
URI: wamp.URI("nexus.examples"),
AnonymousAuth: true,
AllowDisclose: true,
},
},
}
nxr, err := router.NewRouter(routerConfig, nil)
if err != nil {
log.Fatal(err)
}
defer nxr.Close()
// Create websocket server.
wss := router.NewWebsocketServer(nxr)
// Enable websocket compression, which is used if clients request it.
wss.Upgrader.EnableCompression = true
// Configure server to send and look for client tracking cookie.
wss.EnableTrackingCookie = true
// Set keep-alive period to 30 seconds.
wss.KeepAlive = 30 * time.Second
// Create rawsocket server.
rss := router.NewRawSocketServer(nxr, 0, 0)
// ---- Start servers ----
// Run websocket server.
wsCloser, err := wss.ListenAndServe(wsAddr)
if err != nil {
log.Fatal(err)
}
defer wsCloser.Close()
log.Printf("Websocket server listening on ws://%s/", wsAddr)
// Run TCP rawsocket server.
tcpCloser, err := rss.ListenAndServe("tcp", tcpAddr)
if err != nil {
log.Fatal(err)
}
defer tcpCloser.Close()
log.Printf("RawSocket TCP server listening on tcp://%s/", tcpAddr)
// Run unix rawsocket server.
unixCloser, err := rss.ListenAndServe("unix", unixAddr)
if err != nil {
log.Fatal(err)
}
defer unixCloser.Close()
log.Printf("RawSocket unix server listening on unix://%s", unixAddr)
// ---- Start TLS servers ----
var certPath, keyPath string
if _, err = os.Stat(certFile); os.IsNotExist(err) {
certPath = path.Join("server", certFile)
keyPath = path.Join("server", keyFile)
} else {
certPath = certFile
keyPath = keyFile
}
// Run TLS websocket server.
wsTlsCloser, err := wss.ListenAndServeTLS(wsAddrTLS, nil, certPath, keyPath)
if err != nil {
log.Fatal(err)
}
defer wsTlsCloser.Close()
log.Printf("TLS Websocket server listening on wss://%s/", wsAddrTLS)
// Run TLS TCP rawsocket server.
tcpTlsCloser, err := rss.ListenAndServeTLS("tcp", tcpAddrTLS, nil, certPath, keyPath)
if err != nil {
log.Fatal(err)
}
defer tcpTlsCloser.Close()
log.Printf("TLS RawSocket TCP server listening on tcps://%s/", tcpAddrTLS)
// Wait for SIGINT (CTRL-c), then close servers and exit.
shutdown := make(chan os.Signal, 1)
signal.Notify(shutdown, os.Interrupt)
<-shutdown
// Servers close at exit due to defer calls.
}