package main import ( "encoding/json" "fmt" "log" "strings" consul "github.com/hashicorp/consul/api" ) func dnToConsul(dn string) (string, error) { if strings.Contains(dn, "/") { return "", fmt.Errorf("DN %s contains a /", dn) } rdns := strings.Split(dn, ",") // Reverse rdns for i, j := 0, len(rdns)-1; i < j; i, j = i+1, j-1 { rdns[i], rdns[j] = rdns[j], rdns[i] } return strings.Join(rdns, "/"), nil } func consulToDN(key string) (string, string) { path := strings.Split(key, "/") dn := "" for _, cpath := range path { if cpath == "" { continue } kv := strings.Split(cpath, "=") if len(kv) == 2 && kv[0] == "attribute" { return dn, kv[1] } if dn != "" { dn = "," + dn } dn = cpath + dn } // TODO don't panic, handle this log.Panicf("Consul key %s does not end with attribute=something", key) panic("unreachable") } func parseValue(value []byte) ([]string, error) { val := []string{} err := json.Unmarshal(value, &val) if err == nil { return val, nil } val2 := "" err = json.Unmarshal(value, &val2) if err == nil { return []string{val2}, nil } return nil, fmt.Errorf("Not a string or list of strings: %s", value) } func parseConsulResult(data []*consul.KVPair) (map[string]Entry, error) { aggregator := map[string]Entry{} for _, kv := range data { dn, attr := consulToDN(kv.Key) if _, exists := aggregator[dn]; !exists { aggregator[dn] = Entry{} } value, err := parseValue(kv.Value) if err != nil { return nil, err } aggregator[dn][attr] = value } return aggregator, nil } type DNComponent struct { Type string Value string } func parseDN(dn string) ([]DNComponent, error) { rdns := strings.Split(dn, ",") ret := []DNComponent{} for _, rdn := range rdns { splits := strings.Split(rdn, "=") if len(splits) != 2 { return nil, fmt.Errorf("Wrong DN component: %s (expected type=value)", rdn) } ret = append(ret, DNComponent{ Type: splits[0], Value: splits[1], }) } return ret, nil }