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雙noopener noreferrer我在字符串的URL類似以下內容：爪哇 - OWASP的Html消毒劑顯示URL
"<a style=\"color: #800000; background-color: #ffcc00;\" title=\"Test12\" href=\"http://www.google.com\" target=\"_blank\" rel=\"noopener noreferrer\">www.google.com</a>"
消毒後，我的字符串變成：
"<a style="color: #800000; background-color: #ffcc00;" title="Test12" href="http://www.google.com" target="_blank" rel="noopener noreferrer noopener noreferrer">www.google.com</a>"
請注意，在相對屬性它具有雙重noopener noreferrer noopener的noreferrer
String [] allowElements = {"b", "i", "font", "s", "u", "o", "sup", "sub", "ins", "del", "strong", "strike", "tt",
"code", "big", "small", "br", "span", "em", "li", "ul", "ol", "a", "p", "target"};
String [] allowAttributes = {"style", "href", "target", "rel", "title", "_blank"};
PolicyFactory policy = new HtmlPolicyBuilder().allowUrlProtocols("http", "https")
.allowElements(allowElements)
.allowAttributes(allowAttributes)
.onElements(allowElements)
.toFactory();
final String sanitized = policy.sanitize(value);
System.err.println(sanitized);
這是爲什麼？