func parseCommandLine() Config {
var mainConfig Config
var config libwebsocketd.Config
// If adding new command line options, also update the help text in help.go.
// The flag library's auto-generate help message isn't pretty enough.
// server config options
portFlag := flag.Int("port", 80, "HTTP port to listen on")
addressFlag := flag.String("address", "0.0.0.0", "Interface to bind to (e.g. 127.0.0.1)")
versionFlag := flag.Bool("version", false, "Print version and exit")
licenseFlag := flag.Bool("license", false, "Print license and exit")
logLevelFlag := flag.String("loglevel", "access", "Log level, one of: debug, trace, access, info, error, fatal")
// lib config options
basePathFlag := flag.String("basepath", "/", "Base URL path (e.g /)")
reverseLookupFlag := flag.Bool("reverselookup", true, "Perform reverse DNS lookups on remote clients")
scriptDirFlag := flag.String("dir", "", "Base directory for WebSocket scripts")
devConsoleFlag := flag.Bool("devconsole", false, "Enable development console")
flag.Parse()
mainConfig.Addr = fmt.Sprintf("%s:%d", *addressFlag, *portFlag)
mainConfig.BasePath = *basePathFlag
switch *logLevelFlag {
case "debug":
mainConfig.LogLevel = libwebsocketd.LogDebug
break
case "trace":
mainConfig.LogLevel = libwebsocketd.LogTrace
break
case "access":
mainConfig.LogLevel = libwebsocketd.LogAccess
break
case "info":
mainConfig.LogLevel = libwebsocketd.LogInfo
break
case "error":
mainConfig.LogLevel = libwebsocketd.LogError
break
case "fatal":
mainConfig.LogLevel = libwebsocketd.LogFatal
break
default:
PrintHelp()
os.Exit(1)
}
config.ReverseLookup = *reverseLookupFlag
config.ScriptDir = *scriptDirFlag
config.DevConsole = *devConsoleFlag
config.StartupTime = time.Now()
if len(os.Args) == 1 {
PrintHelp()
os.Exit(1)
}
if *versionFlag {
fmt.Printf("%s %s\n", filepath.Base(os.Args[0]), libwebsocketd.Version())
os.Exit(2)
}
if *licenseFlag {
fmt.Printf("%s %s\n", filepath.Base(os.Args[0]), libwebsocketd.Version())
fmt.Printf("%s\n", libwebsocketd.License)
os.Exit(2)
}
args := flag.Args()
if len(args) < 1 && config.ScriptDir == "" {
fmt.Fprintf(os.Stderr, "Please specify COMMAND or provide --dir argument.\n")
os.Exit(1)
}
if len(args) > 0 {
if config.ScriptDir != "" {
fmt.Fprintf(os.Stderr, "Ambiguous. Provided COMMAND and --dir argument. Please only specify just one.\n")
os.Exit(1)
}
config.CommandName = args[0]
config.CommandArgs = flag.Args()[1:]
config.UsingScriptDir = false
}
if len(config.ScriptDir) > 0 {
scriptDir, err := filepath.Abs(config.ScriptDir)
if err != nil {
fmt.Fprintf(os.Stderr, "Could not resolve absolute path to dir '%s'.\n", config.ScriptDir)
os.Exit(1)
}
config.ScriptDir = scriptDir
config.UsingScriptDir = true
}
mainConfig.Config = &config
return mainConfig
}
func PrintHelp() {
msg := strings.Trim(help, " \n")
msg = strings.Replace(msg, "{{binary}}", filepath.Base(os.Args[0]), -1)
msg = strings.Replace(msg, "{{version}}", libwebsocketd.Version(), -1)
fmt.Fprintf(os.Stderr, "%s\n", msg)
}