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-rw-r--r--browser/extensions/screenshots/domainFromUrl.js32
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diff --git a/browser/extensions/screenshots/domainFromUrl.js b/browser/extensions/screenshots/domainFromUrl.js
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+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+/** Returns the domain of a URL, but safely and in ASCII; URLs without domains
+ (such as about:blank) return the scheme, Unicode domains get stripped down
+ to ASCII */
+
+"use strict";
+
+this.domainFromUrl = (function () {
+ return function urlDomainForId(location) {
+ // eslint-disable-line no-unused-vars
+ let domain = location.hostname;
+ if (!domain) {
+ domain = location.origin.split(":")[0];
+ if (!domain) {
+ domain = "unknown";
+ }
+ }
+ if (domain.search(/^[a-z0-9._-]{1,1000}$/i) === -1) {
+ // Probably a unicode domain; we could use punycode but it wouldn't decode
+ // well in the URL anyway. Instead we'll punt.
+ domain = domain.replace(/[^a-z0-9._-]/gi, "");
+ if (!domain) {
+ domain = "site";
+ }
+ }
+ return domain;
+ };
+})();
+null;