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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/. */
"use strict";
this.EXPORTED_SYMBOLS = [ "Feeds" ];
Components.utils.import("resource://gre/modules/XPCOMUtils.jsm");
Components.utils.import("resource://gre/modules/Services.jsm");
XPCOMUtils.defineLazyModuleGetter(this, "BrowserUtils",
"resource://gre/modules/BrowserUtils.jsm");
XPCOMUtils.defineLazyModuleGetter(this, "RecentWindow",
"resource:///modules/RecentWindow.jsm");
const { interfaces: Ci, classes: Cc } = Components;
this.Feeds = {
init() {
let mm = Cc["@mozilla.org/globalmessagemanager;1"].getService(Ci.nsIMessageListenerManager);
mm.addMessageListener("WCCR:registerProtocolHandler", this);
mm.addMessageListener("WCCR:registerContentHandler", this);
Services.ppmm.addMessageListener("WCCR:setAutoHandler", this);
Services.ppmm.addMessageListener("FeedConverter:addLiveBookmark", this);
},
receiveMessage(aMessage) {
let data = aMessage.data;
switch (aMessage.name) {
case "WCCR:registerProtocolHandler": {
let registrar = Cc["@mozilla.org/embeddor.implemented/web-content-handler-registrar;1"].
getService(Ci.nsIWebContentHandlerRegistrar);
registrar.registerProtocolHandler(data.protocol, data.uri, data.title,
aMessage.target);
break;
}
case "WCCR:registerContentHandler": {
let registrar = Cc["@mozilla.org/embeddor.implemented/web-content-handler-registrar;1"].
getService(Ci.nsIWebContentHandlerRegistrar);
registrar.registerContentHandler(data.contentType, data.uri, data.title,
aMessage.target);
break;
}
case "WCCR:setAutoHandler": {
let registrar = Cc["@mozilla.org/embeddor.implemented/web-content-handler-registrar;1"].
getService(Ci.nsIWebContentConverterService);
registrar.setAutoHandler(data.contentType, data.handler);
break;
}
case "FeedConverter:addLiveBookmark": {
let topWindow = RecentWindow.getMostRecentBrowserWindow();
topWindow.PlacesCommandHook.addLiveBookmark(data.spec, data.title, data.subtitle)
.catch(Components.utils.reportError);
break;
}
}
},
/**
* isValidFeed: checks whether the given data represents a valid feed.
*
* @param aLink
* An object representing a feed with title, href and type.
* @param aPrincipal
* The principal of the document, used for security check.
* @param aIsFeed
* Whether this is already a known feed or not, if true only a security
* check will be performed.
*/
isValidFeed: function(aLink, aPrincipal, aIsFeed) {
if (!aLink || !aPrincipal)
return false;
var type = aLink.type.toLowerCase().replace(/^\s+|\s*(?:;.*)?$/g, "");
if (!aIsFeed) {
aIsFeed = (type == "application/rss+xml" ||
type == "application/atom+xml");
}
if (aIsFeed) {
// re-create the principal as it may be a CPOW.
// once this can't be a CPOW anymore, we should just use aPrincipal instead
// of creating a new one.
let principalURI = BrowserUtils.makeURIFromCPOW(aPrincipal.URI);
let principalToCheck =
Services.scriptSecurityManager.createCodebasePrincipal(principalURI, aPrincipal.originAttributes);
try {
BrowserUtils.urlSecurityCheck(aLink.href, principalToCheck,
Ci.nsIScriptSecurityManager.DISALLOW_INHERIT_PRINCIPAL);
return type || "application/rss+xml";
}
catch (ex) {
}
}
return null;
},
};