20 lines
1.0 KiB
Swift
20 lines
1.0 KiB
Swift
//
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// String+URLChecker.swift
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// NetNewsWire
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//
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// Created by Stuart Breckenridge on 3/7/20.
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// Copyright © 2020 Ranchero Software. All rights reserved.
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//
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import Foundation
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extension String {
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/// Reference: [StackOverflow](https://stackoverflow.com/questions/161738/what-is-the-best-regular-expression-to-check-if-a-string-is-a-valid-url)
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var isValidURL: Bool {
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let regEx = "^([a-zA-Z0-9\\.\\-]+(\\:[a-zA-Z0-9\\.&%\\$\\-]+)*@)*((25[0-5]|2[0-4][0-9]|[0-1]{1}[0-9]{2}|[1-9]{1}[0-9]{1}|[1-9])\\.(25[0-5]|2[0-4][0-9]|[0-1]{1}[0-9]{2}|[1-9]{1}[0-9]{1}|[1-9]|0)\\.(25[0-5]|2[0-4][0-9]|[0-1]{1}[0-9]{2}|[1-9]{1}[0-9]{1}|[1-9]|0)\\.(25[0-5]|2[0-4][0-9]|[0-1]{1}[0-9]{2}|[1-9]{1}[0-9]{1}|[0-9])|localhost|([a-zA-Z0-9\\-]+\\.)*[a-zA-Z0-9\\-]+\\.(com|edu|gov|int|mil|net|org|biz|arpa|info|name|pro|aero|coop|museum|[a-zA-Z]{2}))(\\:[0-9]+)*(/($|[a-zA-Z0-9\\.\\,\\?\\'\\\\\\+&%\\$#\\=~_\\-]+))*$"
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let predicate = NSPredicate(format:"SELF MATCHES %@", argumentArray:[regEx])
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return predicate.evaluate(with: self)
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}
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}
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