| //Copyright 2017 Huawei Technologies Co., Ltd |
| // |
| //Licensed 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 urlvalidator |
| |
| import ( |
| "net/url" |
| "regexp" |
| "strings" |
| ) |
| |
| const ( |
| URL string = `^(([1-9]\d?|1\d\d|2[01]\d|22[0-3])(\.(1?\d{1,2}|2[0-4]\d|25[0-5])){2}(\.([0-9]\d?|1\d\d|2[0-4]\d|25[0-4])))(:(\d{1,5}))$` |
| PATTERN string = `#%` |
| ) |
| |
| var ( |
| rxURL = regexp.MustCompile(URL) |
| ) |
| var ( |
| rxURI = regexp.MustCompile(PATTERN) |
| ) |
| |
| // IsURL check if the string is an URL. |
| func IsURL(str string) bool { |
| if str == "" || len(str) >= 2083 || len(str) <= 3 || strings.HasPrefix(str, ".") { |
| return false |
| } |
| u, err := url.Parse(str) |
| if err != nil { |
| return false |
| } |
| if strings.HasPrefix(u.Host, ".") { |
| return false |
| } |
| if u.Host == "" && (u.Path != "" && !strings.Contains(u.Path, ".")) { |
| return false |
| } |
| return rxURL.MatchString(str) |
| |
| } |
| func IsRequestURI(uri string) bool { |
| if uri == "" || len(uri) >= 2048 || len(uri) <= 3 || strings.HasPrefix(uri, ".") { |
| return false |
| } |
| if strings.HasSuffix(uri, ";") || strings.HasSuffix(uri, "&") || strings.HasSuffix(uri, "?") || strings.HasSuffix(uri, "+") || strings.HasSuffix(uri, "@") || strings.Contains(uri, "//") { |
| return false |
| } |
| return !rxURI.MatchString(uri) |
| } |