| /* |
| * 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 validate |
| |
| import ( |
| "regexp" |
| "strconv" |
| "strings" |
| |
| "github.com/apache/servicecomb-service-center/pkg/util" |
| ) |
| |
| type VersionRegexp struct { |
| Regex *regexp.Regexp |
| Fuzzy bool |
| } |
| |
| func (vr *VersionRegexp) MatchString(s string) bool { |
| if vr.Regex != nil && !vr.Regex.MatchString(s) { |
| return false |
| } |
| return vr.validateVersionRule(s) == nil |
| } |
| |
| func (vr *VersionRegexp) String() string { |
| if vr.Fuzzy { |
| return "the form x[.y[.z]] or x[.y[.z]]+ or x[.y[.z]]-x[.y[.z]] or 'latest' where x y and z are 0-32767 range" |
| } |
| return "the form x[.y[.z]] where x y and z are 0-32767 range" |
| } |
| |
| func (vr *VersionRegexp) validateVersionRule(versionRule string) (err error) { |
| if len(versionRule) == 0 { |
| return |
| } |
| |
| if !vr.Fuzzy { |
| _, err = VersionToInt64(versionRule) |
| return |
| } |
| |
| rangeIdx := strings.Index(versionRule, "-") |
| switch { |
| case versionRule == "latest": |
| return |
| case versionRule[len(versionRule)-1:] == "+": |
| // 取最低版本及高版本集合 |
| start := versionRule[:len(versionRule)-1] |
| _, err = VersionToInt64(start) |
| case rangeIdx > 0: |
| // 取版本范围集合 |
| start := versionRule[:rangeIdx] |
| end := versionRule[rangeIdx+1:] |
| if _, err = VersionToInt64(start); err == nil { |
| _, err = VersionToInt64(end) |
| } |
| default: |
| // 精确匹配 |
| _, err = VersionToInt64(versionRule) |
| } |
| return |
| } |
| |
| func NewVersionRegexp(fuzzy bool) (vr *VersionRegexp) { |
| vr = &VersionRegexp{Fuzzy: fuzzy} |
| if fuzzy { |
| vr.Regex, _ = regexp.Compile(`^\d+(\.\d+){0,3}\+?$|^\d+(\.\d+){0,3}-\d+(\.\d+){0,3}$|^latest$`) |
| return |
| } |
| vr.Regex, _ = regexp.Compile(`^\d+(\.\d+){0,3}$`) |
| return |
| } |
| |
| func VersionToInt64(versionStr string) (int64, error) { |
| verBytes := [4]int16{} |
| |
| for idx, i := 0, 0; i < 4 && idx < len(versionStr); i++ { |
| f := strings.IndexRune(versionStr[idx:], '.') |
| if f < 0 { |
| f = len(versionStr) - idx |
| } |
| integer, err := strconv.ParseInt(versionStr[idx:idx+f], 10, 16) |
| if err != nil { |
| return 0, err |
| } |
| verBytes[i] = int16(integer) |
| idx += f + 1 |
| } |
| ret := util.Int16ToInt64(verBytes[:]) |
| return ret, nil |
| } |