/
main.go
94 lines (82 loc) · 2.13 KB
/
main.go
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// Modified from https://github.com/orus-io/nats-websocket-gw/blob/master/cmd/nats-websocket-gw/main.go
// Copyright 2018 Antmanler
// Copyright (c) 2017 orus-io
package main
import (
"fmt"
"log"
"net"
"net/http"
"os"
"github.com/antmanler/gnatsd-gw/gnatsdgw"
fwd "github.com/antmanler/gnatsd-gw/gnatsdgw/server"
"github.com/antmanler/gnatsd-gw/gnatsdgw/ws"
"github.com/gorilla/websocket"
)
func usage() {
fmt.Printf(`Usage: %s [ --help ] [ --no-origin-check ] [ --trace ]
`, os.Args[0])
}
func main() {
options := &fwd.Options{
Logger: simpleLogger{},
Handlers: fwd.Handlers{
OnInfo: func(client fwd.Forwarder, cmd *fwd.InfoCmd) (newCmd *fwd.InfoCmd, err error) {
log.Printf("INFO: %s\n", cmd.Payload)
if val, ok := client.Get(gnatsdgw.B2CConnKey); ok {
log.Printf("Backend: %s\n", val.(net.Conn).RemoteAddr())
}
if val, ok := client.Get(gnatsdgw.C2BConnKey); ok {
log.Printf("HOST: %s\n", val.(*ws.Conn).Request.Host)
}
return
},
},
}
var upgrader *websocket.Upgrader
for _, arg := range os.Args[1:] {
switch arg {
case "--help":
usage()
return
case "--no-origin-check":
upgrader = &websocket.Upgrader{
ReadBufferSize: 1024,
WriteBufferSize: 1024,
CheckOrigin: func(r *http.Request) bool { return true },
}
case "--trace":
options.Trace = true
default:
fmt.Printf("Invalid args: %s\n\n", arg)
usage()
return
}
}
handler, err := ws.NewHandler(
options,
func() (net.Conn, error) {
return net.Dial("tcp", "localhost:4222")
},
upgrader,
nil,
)
if err != nil {
log.Fatalln(err)
}
http.Handle("/nats", handler)
http.ListenAndServe("0.0.0.0:8910", nil)
}
type simpleLogger struct{}
func (simpleLogger) Debugf(format string, args ...interface{}) {
log.Println(fmt.Sprintf("D "+format, args...))
}
func (simpleLogger) Infof(format string, args ...interface{}) {
log.Println(fmt.Sprintf("I "+format, args...))
}
func (simpleLogger) Warningf(format string, args ...interface{}) {
log.Println(fmt.Sprintf("W "+format, args...))
}
func (simpleLogger) Errorf(format string, args ...interface{}) {
log.Println(fmt.Sprintf("E "+format, args...))
}