Zack Williams | e940c7a | 2019-08-21 14:25:39 -0700 | [diff] [blame] | 1 | /* |
| 2 | Copyright 2015 The Kubernetes Authors. |
| 3 | |
| 4 | Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | you may not use this file except in compliance with the License. |
| 6 | You may obtain a copy of the License at |
| 7 | |
| 8 | http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | |
| 10 | Unless required by applicable law or agreed to in writing, software |
| 11 | distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | See the License for the specific language governing permissions and |
| 14 | limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | package net |
| 18 | |
| 19 | import ( |
| 20 | "strings" |
| 21 | |
| 22 | "k8s.io/apimachinery/pkg/util/sets" |
| 23 | ) |
| 24 | |
| 25 | var validSchemes = sets.NewString("http", "https", "") |
| 26 | |
| 27 | // SplitSchemeNamePort takes a string of the following forms: |
| 28 | // * "<name>", returns "", "<name>","", true |
| 29 | // * "<name>:<port>", returns "", "<name>","<port>",true |
| 30 | // * "<scheme>:<name>:<port>", returns "<scheme>","<name>","<port>",true |
| 31 | // |
| 32 | // Name must be non-empty or valid will be returned false. |
| 33 | // Scheme must be "http" or "https" if specified |
| 34 | // Port is returned as a string, and it is not required to be numeric (could be |
| 35 | // used for a named port, for example). |
| 36 | func SplitSchemeNamePort(id string) (scheme, name, port string, valid bool) { |
| 37 | parts := strings.Split(id, ":") |
| 38 | switch len(parts) { |
| 39 | case 1: |
| 40 | name = parts[0] |
| 41 | case 2: |
| 42 | name = parts[0] |
| 43 | port = parts[1] |
| 44 | case 3: |
| 45 | scheme = parts[0] |
| 46 | name = parts[1] |
| 47 | port = parts[2] |
| 48 | default: |
| 49 | return "", "", "", false |
| 50 | } |
| 51 | |
| 52 | if len(name) > 0 && validSchemes.Has(scheme) { |
| 53 | return scheme, name, port, true |
| 54 | } else { |
| 55 | return "", "", "", false |
| 56 | } |
| 57 | } |
| 58 | |
| 59 | // JoinSchemeNamePort returns a string that specifies the scheme, name, and port: |
| 60 | // * "<name>" |
| 61 | // * "<name>:<port>" |
| 62 | // * "<scheme>:<name>:<port>" |
| 63 | // None of the parameters may contain a ':' character |
| 64 | // Name is required |
| 65 | // Scheme must be "", "http", or "https" |
| 66 | func JoinSchemeNamePort(scheme, name, port string) string { |
| 67 | if len(scheme) > 0 { |
| 68 | // Must include three segments to specify scheme |
| 69 | return scheme + ":" + name + ":" + port |
| 70 | } |
| 71 | if len(port) > 0 { |
| 72 | // Must include two segments to specify port |
| 73 | return name + ":" + port |
| 74 | } |
| 75 | // Return name alone |
| 76 | return name |
| 77 | } |