| /* |
| Licensed to the 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. |
| The 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 utils |
| |
| import ( |
| "errors" |
| "fmt" |
| "regexp" |
| "strings" |
| ) |
| |
| var ( |
| ipRegex, _ = regexp.Compile(`^((25[0-5]|2[0-4]\d|((1\d{2})|([1-9]?\d)))\.){3}(25[0-5]|2[0-4]\d|((1\d{2})|([1-9]?\d)))`) |
| ) |
| |
| // HashString hashes a string to a unique hashcode. |
| func HashString(s string) int { |
| val := []byte(s) |
| var h int |
| |
| for idx := range val { |
| h = 31*h + int(val[idx]) |
| } |
| |
| return h |
| } |
| |
| func StrJoin(str, key string, value interface{}) string { |
| if key == "" || value == "" { |
| return str |
| } |
| |
| return str + key + ": " + fmt.Sprint(value) + ", " |
| } |
| |
| func VerifyIP(ip string) error { |
| if strings.Contains(ip, ";") { |
| return errors.New("multiple IP addr does not support") |
| } |
| ips := ipRegex.FindAllString(ip, -1) |
| if len(ips) == 0 { |
| return errors.New("IP addr error") |
| } |
| |
| if len(ips) > 1 { |
| return errors.New("multiple IP addr does not support") |
| } |
| return nil |
| } |