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53 lines
1.5 KiB
JavaScript
53 lines
1.5 KiB
JavaScript
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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"use strict";
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this.EXPORTED_SYMBOLS = [ "Feeds" ];
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Components.utils.import("resource://gre/modules/XPCOMUtils.jsm");
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XPCOMUtils.defineLazyModuleGetter(this, "BrowserUtils",
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"resource://gre/modules/BrowserUtils.jsm");
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const Ci = Components.interfaces;
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this.Feeds = {
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/**
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* isValidFeed: checks whether the given data represents a valid feed.
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*
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* @param aLink
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* An object representing a feed with title, href and type.
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* @param aPrincipal
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* The principal of the document, used for security check.
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* @param aIsFeed
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* Whether this is already a known feed or not, if true only a security
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* check will be performed.
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*/
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isValidFeed: function(aLink, aPrincipal, aIsFeed) {
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if (!aLink || !aPrincipal)
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return false;
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var type = aLink.type.toLowerCase().replace(/^\s+|\s*(?:;.*)?$/g, "");
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if (!aIsFeed) {
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aIsFeed = (type == "application/rss+xml" ||
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type == "application/atom+xml");
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}
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if (aIsFeed) {
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try {
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BrowserUtils.urlSecurityCheck(aLink.href, aPrincipal,
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Ci.nsIScriptSecurityManager.DISALLOW_INHERIT_PRINCIPAL);
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return type || "application/rss+xml";
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}
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catch(ex) {
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}
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}
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return null;
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},
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};
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