func LoadConfiguration(path string) (config *Configuration, err error) {
configPath := path
if configPath == "" {
configPath = defaultPath()
}
log.Info("Reading configuration file %s", configPath)
configBuf, err := ioutil.ReadFile(configPath)
if err != nil {
// failure to read a configuration file is only a fatal error if
// the user specified one explicitly
if path != "" {
err = fmt.Errorf("Failed to read configuration file %s: %v", configPath, err)
return
}
}
// deserialize/parse the config
config = new(Configuration)
if err = yaml.Unmarshal(configBuf, &config); err != nil {
err = fmt.Errorf("Error parsing configuration file %s: %v", configPath, err)
return
}
return
}
func Main() {
// parse command line opts
opts, err := parseArgs()
if err != nil {
fmt.Println(err)
os.Exit(1)
}
// set up logging
if opts.logto != "" {
log.LogTo(opts.logto)
}
// set up tls configuration
tlsName, _, err := net.SplitHostPort(opts.serverAddr)
if err != nil {
fmt.Printf("Failed to parse server address: %v: %v\n", opts.serverAddr, err)
os.Exit(1)
}
tlsCfg, err := tls.ClientTrusted(tlsName)
if err != nil {
fmt.Printf("Failed to create TLS configuration for name %v: %v\n", tlsName, err)
os.Exit(1)
}
// load configuration file
config, err := LoadConfiguration(opts.configPath)
if err != nil {
fmt.Printf("Error loading confuration: %v", err)
os.Exit(1)
}
// override authtoken with command line option
if opts.authtoken != "" {
config.AuthToken = opts.authtoken
}
// connect to srvdir service
authExtra := srvdir_proto.NewAuthExtra(config.AuthToken, version)
c, err := tunnel.DialTLSReconnecting("tcp", opts.serverAddr, tlsCfg, authExtra)
if err != nil {
fmt.Printf("Failed to setup tunnel connection to %v: %v\n", opts.serverAddr, err)
os.Exit(1)
}
if err := SaveAuthToken(opts.configPath, config.AuthToken); err != nil {
log.Warn("Failed to save authtoken to config file: %v", err)
}
routes := make([]Route, len(opts.dirs))
for i, d := range opts.dirs {
httpOpts := &proto.HTTPOptions{Subdomain: d.subdomain, Auth: opts.auth}
tun, err := c.ListenHTTPS(httpOpts, nil)
if err != nil {
fmt.Printf("Failed to listen on subdomain '%v': %v\n", d.subdomain, err)
os.Exit(1)
}
path := d.path
go func() {
log.Info("Serving %s on %s", path, tun.Addr().String())
fs := FileServer(Dir(path), opts.index, opts.readOnly, opts.tmpl)
if err := http.Serve(tun, fs); err != nil {
fmt.Printf("Failed to start static http server for directory %v: %v\n", path, err)
os.Exit(1)
}
}()
routes[i] = Route{
addr: tun.Addr().String(),
path: path,
}
}
// run the console UI
if opts.logto != "stdout" {
ui(routes)
} else {
select {}
}
}