105 lines
2.5 KiB
Go
105 lines
2.5 KiB
Go
package envoy
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import (
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"flag"
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"fmt"
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"net"
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"strconv"
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"strings"
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"github.com/hashicorp/consul/api"
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"github.com/hashicorp/go-sockaddr/template"
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)
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const defaultGatewayPort int = 443
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// ServiceAddressValue implements a flag.Value that may be used to parse an
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// addr:port string into an api.ServiceAddress.
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type ServiceAddressValue struct {
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value api.ServiceAddress
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}
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func (s *ServiceAddressValue) String() string {
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if s == nil || (s.value.Port == 0 && s.value.Address == "") {
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return fmt.Sprintf(":%d", defaultGatewayPort)
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}
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return fmt.Sprintf("%v:%d", s.value.Address, s.value.Port)
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}
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func (s *ServiceAddressValue) Value() api.ServiceAddress {
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if s == nil || s.value.Port == 0 && s.value.Address == "" {
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return api.ServiceAddress{Port: defaultGatewayPort}
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}
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return s.value
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}
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func (s *ServiceAddressValue) Set(raw string) error {
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var err error
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s.value, err = parseAddress(raw)
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return err
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}
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func parseAddress(raw string) (api.ServiceAddress, error) {
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result := api.ServiceAddress{}
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x, err := template.Parse(raw)
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if err != nil {
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return result, fmt.Errorf("Error parsing address %q: %v", raw, err)
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}
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addr, portStr, err := net.SplitHostPort(x)
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// Error message from Go's net/ipsock.go
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if err != nil {
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if !strings.Contains(err.Error(), "missing port in address") {
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return result, fmt.Errorf("Error parsing address %q: %v", x, err)
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}
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// Use the whole input as the address if there wasn't a port.
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if ip := net.ParseIP(x); ip == nil {
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return result, fmt.Errorf("Error parsing address %q: not an IP address", x)
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}
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addr = x
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}
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port := defaultGatewayPort
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if portStr != "" {
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port, err = strconv.Atoi(portStr)
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if err != nil {
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return result, fmt.Errorf("Error parsing port %q: %v", portStr, err)
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}
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}
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result.Address = addr
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result.Port = port
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return result, nil
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}
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var _ flag.Value = (*ServiceAddressValue)(nil)
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type ServiceAddressMapValue struct {
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value map[string]api.ServiceAddress
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}
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func (s *ServiceAddressMapValue) String() string {
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buf := new(strings.Builder)
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for k, v := range s.value {
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buf.WriteString(fmt.Sprintf("%v=%v:%d,", k, v.Address, v.Port))
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}
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return buf.String()
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}
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func (s *ServiceAddressMapValue) Set(raw string) error {
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if s.value == nil {
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s.value = make(map[string]api.ServiceAddress)
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}
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idx := strings.Index(raw, "=")
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if idx == -1 {
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return fmt.Errorf(`Missing "=" in argument: %s`, raw)
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}
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key, value := raw[0:idx], raw[idx+1:]
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var err error
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s.value[key], err = parseAddress(value)
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return err
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}
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var _ flag.Value = (*ServiceAddressMapValue)(nil)
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