func urlsFromStrings(input string, tlsInfo transport.TLSInfo) ([]url.URL, error) {
urls := []url.URL{}
for _, addr := range strings.Split(input, ",") {
addrURL := url.URL{Scheme: "http", Host: addr}
if !tlsInfo.Empty() {
addrURL.Scheme = "https"
}
urls = append(urls, addrURL)
}
return urls, nil
}
func listener(addr, cafile, certfile, keyfile string) (net.Listener, error) {
rex := regexp.MustCompile("(?:([a-z]+)://)?(.*)")
groups := rex.FindStringSubmatch(addr)
var l net.Listener
var err error
switch {
case groups == nil:
return nil, fmt.Errorf("bad listener address")
case groups[1] == "", groups[1] == "tcp":
if l, err = net.Listen("tcp", groups[2]); err != nil {
return nil, err
}
case groups[1] == "fd":
if l, err = fdListener(groups[2]); err != nil {
return nil, err
}
default:
return nil, fmt.Errorf("bad listener scheme")
}
tlsinfo := transport.TLSInfo{
CAFile: cafile,
CertFile: certfile,
KeyFile: keyfile,
}
if !tlsinfo.Empty() {
cfg, err := tlsinfo.ServerConfig()
if err != nil {
return nil, err
}
l = tls.NewListener(l, cfg)
}
return l, nil
}
// URLsFromFlags decides what URLs should be using two different flags
// as datasources. The first flag's Value must be of type URLs, while
// the second must be of type IPAddressPort. If both of these flags
// are set, an error will be returned. If only the first flag is set,
// the underlying url.URL objects will be returned unmodified. If the
// second flag happens to be set, the underlying IPAddressPort will be
// converted to a url.URL and returned. The Scheme of the returned
// url.URL will be http unless the provided TLSInfo object is non-empty.
// If neither of the flags have been explicitly set, the default value
// of the first flag will be returned unmodified.
func URLsFromFlags(fs *flag.FlagSet, urlsFlagName string, addrFlagName string, tlsInfo transport.TLSInfo) ([]url.URL, error) {
visited := make(map[string]struct{})
fs.Visit(func(f *flag.Flag) {
visited[f.Name] = struct{}{}
})
_, urlsFlagIsSet := visited[urlsFlagName]
_, addrFlagIsSet := visited[addrFlagName]
if addrFlagIsSet {
if urlsFlagIsSet {
return nil, fmt.Errorf("Set only one of flags -%s and -%s", urlsFlagName, addrFlagName)
}
addr := *fs.Lookup(addrFlagName).Value.(*IPAddressPort)
addrURL := url.URL{Scheme: "http", Host: addr.String()}
if !tlsInfo.Empty() {
addrURL.Scheme = "https"
}
return []url.URL{addrURL}, nil
}
return []url.URL(*fs.Lookup(urlsFlagName).Value.(*URLsValue)), nil
}
func NewRemoteManager(listenAddr, cafile, certfile, keyfile string) (subnet.Manager, error) {
tls := transport.TLSInfo{
CAFile: cafile,
CertFile: certfile,
KeyFile: keyfile,
}
t, err := NewTransport(tls)
if err != nil {
return nil, err
}
var scheme string
if tls.Empty() && tls.CAFile == "" {
scheme = "http://"
} else {
scheme = "https://"
}
return &RemoteManager{
base: scheme + listenAddr + "/v1",
transport: t,
}, nil
}