| // Licensed to Apache Software Foundation (ASF) under one or more contributor |
| // license agreements. See the NOTICE file distributed with |
| // this work for additional information regarding copyright |
| // ownership. Apache Software Foundation (ASF) licenses this file to you under |
| // the Apache License, Version 2.0 (the "License"); you may |
| // not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, |
| // software distributed under the License is distributed on an |
| // "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| // KIND, either express or implied. See the License for the |
| // specific language governing permissions and limitations |
| // under the License. |
| |
| package interceptor |
| |
| import ( |
| "encoding/base64" |
| "fmt" |
| "strings" |
| |
| "github.com/urfave/cli/v2" |
| ) |
| |
| const ( |
| endpointIDFlagName = "endpoint-id" |
| endpointNameFlagName = "endpoint-name" |
| destEndpointIDFlagName = "dest-endpoint-id" |
| destEndpointNameFlagName = "dest-endpoint-name" |
| ) |
| |
| // ParseEndpoint parses the endpoint id or endpoint name, |
| // and converts the present one to the missing one. |
| // See flags.EndpointFlags. |
| func ParseEndpoint(required bool) func(*cli.Context) error { |
| return func(ctx *cli.Context) error { |
| if err := ParseService(required)(ctx); err != nil { |
| return err |
| } |
| return parseEndpoint(required, endpointIDFlagName, endpointNameFlagName, serviceIDFlagName)(ctx) |
| } |
| } |
| |
| // ParseEndpointRelation parses the source and destination endpoint id or endpoint name, |
| // and converts the present one to the missing one. |
| // See flags.EndpointRelationFlags. |
| func ParseEndpointRelation(required bool) func(*cli.Context) error { |
| return func(ctx *cli.Context) error { |
| if err := ParseServiceRelation(required)(ctx); err != nil { |
| return err |
| } |
| if err := ParseEndpoint(required)(ctx); err != nil { |
| return err |
| } |
| return parseEndpoint(required, destEndpointIDFlagName, destEndpointNameFlagName, destServiceIDFlagName)(ctx) |
| } |
| } |
| |
| func parseEndpoint(required bool, idFlagName, nameFlagName, serviceIDFlagName string) func(*cli.Context) error { |
| return func(ctx *cli.Context) error { |
| id := ctx.String(idFlagName) |
| name := ctx.String(nameFlagName) |
| serviceID := ctx.String(serviceIDFlagName) |
| |
| if id == "" && name == "" { |
| if required { |
| return fmt.Errorf(`either flags "--%s" or "--%s" must be given`, idFlagName, nameFlagName) |
| } |
| return nil |
| } |
| |
| if id != "" { |
| parts := strings.Split(id, "_") |
| if len(parts) != 2 { |
| return fmt.Errorf("invalid endpoint id, cannot be splitted into 2 parts. %v", id) |
| } |
| s, err := base64.StdEncoding.DecodeString(parts[1]) |
| if err != nil { |
| return err |
| } |
| name = string(s) |
| } else if name != "" { |
| if serviceID == "" { |
| return fmt.Errorf(`"--%s" is specified but its related service name or id is not given`, nameFlagName) |
| } |
| id = serviceID + "_" + b64enc(name) |
| } |
| |
| if err := ctx.Set(idFlagName, id); err != nil { |
| return err |
| } |
| return ctx.Set(nameFlagName, name) |
| } |
| } |
| |
| func b64enc(text string) string { |
| return base64.StdEncoding.EncodeToString([]byte(text)) |
| } |