Mirror of roytam1's UXP fork just in case Moonchild and Tobin decide to go after him
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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/. */
/**
* The AddonUpdateChecker is responsible for retrieving the update information
* from an add-on's remote update manifest.
*/
"use strict";
const Cc = Components.classes;
const Ci = Components.interfaces;
const Cu = Components.utils;
this.EXPORTED_SYMBOLS = [ "AddonUpdateChecker" ];
const TIMEOUT = 60 * 1000;
const PREFIX_NS_RDF = "http://www.w3.org/1999/02/22-rdf-syntax-ns#";
const PREFIX_NS_EM = "http://www.mozilla.org/2004/em-rdf#";
const PREFIX_ITEM = "urn:mozilla:item:";
const PREFIX_EXTENSION = "urn:mozilla:extension:";
const PREFIX_THEME = "urn:mozilla:theme:";
const TOOLKIT_ID = "toolkit@mozilla.org"
#ifdef MOZ_PHOENIX_EXTENSIONS
const FIREFOX_ID = "{ec8030f7-c20a-464f-9b0e-13a3a9e97384}"
#endif
const XMLURI_PARSE_ERROR = "http://www.mozilla.org/newlayout/xml/parsererror.xml"
const PREF_UPDATE_REQUIREBUILTINCERTS = "extensions.update.requireBuiltInCerts";
Components.utils.import("resource://gre/modules/Services.jsm");
Components.utils.import("resource://gre/modules/XPCOMUtils.jsm");
XPCOMUtils.defineLazyModuleGetter(this, "AddonManager",
"resource://gre/modules/AddonManager.jsm");
XPCOMUtils.defineLazyModuleGetter(this, "AddonRepository",
"resource://gre/modules/addons/AddonRepository.jsm");
// Shared code for suppressing bad cert dialogs.
XPCOMUtils.defineLazyGetter(this, "CertUtils", function certUtilsLazyGetter() {
let certUtils = {};
Components.utils.import("resource://gre/modules/CertUtils.jsm", certUtils);
return certUtils;
});
var gRDF = Cc["@mozilla.org/rdf/rdf-service;1"].
getService(Ci.nsIRDFService);
Cu.import("resource://gre/modules/Log.jsm");
const LOGGER_ID = "addons.update-checker";
// Create a new logger for use by the Addons Update Checker
// (Requires AddonManager.jsm)
var logger = Log.repository.getLogger(LOGGER_ID);
/**
* A serialisation method for RDF data that produces an identical string
* for matching RDF graphs.
* The serialisation is not complete, only assertions stemming from a given
* resource are included, multiple references to the same resource are not
* permitted, and the RDF prolog and epilog are not included.
* RDF Blob and Date literals are not supported.
*/
function RDFSerializer() {
this.cUtils = Cc["@mozilla.org/rdf/container-utils;1"].
getService(Ci.nsIRDFContainerUtils);
this.resources = [];
}
RDFSerializer.prototype = {
INDENT: " ", // The indent used for pretty-printing
resources: null, // Array of the resources that have been found
/**
* Escapes characters from a string that should not appear in XML.
*
* @param aString
* The string to be escaped
* @return a string with all characters invalid in XML character data
* converted to entity references.
*/
escapeEntities: function RDFS_escapeEntities(aString) {
aString = aString.replace(/&/g, "&");
aString = aString.replace(/</g, "&lt;");
aString = aString.replace(/>/g, "&gt;");
return aString.replace(/"/g, "&quot;");
},
/**
* Serializes all the elements of an RDF container.
*
* @param aDs
* The RDF datasource
* @param aContainer
* The RDF container to output the child elements of
* @param aIndent
* The current level of indent for pretty-printing
* @return a string containing the serialized elements.
*/
serializeContainerItems: function RDFS_serializeContainerItems(aDs, aContainer,
aIndent) {
var result = "";
var items = aContainer.GetElements();
while (items.hasMoreElements()) {
var item = items.getNext().QueryInterface(Ci.nsIRDFResource);
result += aIndent + "<RDF:li>\n"
result += this.serializeResource(aDs, item, aIndent + this.INDENT);
result += aIndent + "</RDF:li>\n"
}
return result;
},
/**
* Serializes all em:* (see EM_NS) properties of an RDF resource except for
* the em:signature property. As this serialization is to be compared against
* the manifest signature it cannot contain the em:signature property itself.
*
* @param aDs
* The RDF datasource
* @param aResource
* The RDF resource that contains the properties to serialize
* @param aIndent
* The current level of indent for pretty-printing
* @return a string containing the serialized properties.
* @throws if the resource contains a property that cannot be serialized
*/
serializeResourceProperties: function RDFS_serializeResourceProperties(aDs,
aResource,
aIndent) {
var result = "";
var items = [];
var arcs = aDs.ArcLabelsOut(aResource);
while (arcs.hasMoreElements()) {
var arc = arcs.getNext().QueryInterface(Ci.nsIRDFResource);
if (arc.ValueUTF8.substring(0, PREFIX_NS_EM.length) != PREFIX_NS_EM)
continue;
var prop = arc.ValueUTF8.substring(PREFIX_NS_EM.length);
if (prop == "signature")
continue;
var targets = aDs.GetTargets(aResource, arc, true);
while (targets.hasMoreElements()) {
var target = targets.getNext();
if (target instanceof Ci.nsIRDFResource) {
var item = aIndent + "<em:" + prop + ">\n";
item += this.serializeResource(aDs, target, aIndent + this.INDENT);
item += aIndent + "</em:" + prop + ">\n";
items.push(item);
}
else if (target instanceof Ci.nsIRDFLiteral) {
items.push(aIndent + "<em:" + prop + ">" +
this.escapeEntities(target.Value) + "</em:" + prop + ">\n");
}
else if (target instanceof Ci.nsIRDFInt) {
items.push(aIndent + "<em:" + prop + " NC:parseType=\"Integer\">" +
target.Value + "</em:" + prop + ">\n");
}
else {
throw Components.Exception("Cannot serialize unknown literal type");
}
}
}
items.sort();
result += items.join("");
return result;
},
/**
* Recursively serializes an RDF resource and all resources it links to.
* This will only output EM_NS properties and will ignore any em:signature
* property.
*
* @param aDs
* The RDF datasource
* @param aResource
* The RDF resource to serialize
* @param aIndent
* The current level of indent for pretty-printing. If undefined no
* indent will be added
* @return a string containing the serialized resource.
* @throws if the RDF data contains multiple references to the same resource.
*/
serializeResource: function RDFS_serializeResource(aDs, aResource, aIndent) {
if (this.resources.indexOf(aResource) != -1 ) {
// We cannot output multiple references to the same resource.
throw Components.Exception("Cannot serialize multiple references to " + aResource.Value);
}
if (aIndent === undefined)
aIndent = "";
this.resources.push(aResource);
var container = null;
var type = "Description";
if (this.cUtils.IsSeq(aDs, aResource)) {
type = "Seq";
container = this.cUtils.MakeSeq(aDs, aResource);
}
else if (this.cUtils.IsAlt(aDs, aResource)) {
type = "Alt";
container = this.cUtils.MakeAlt(aDs, aResource);
}
else if (this.cUtils.IsBag(aDs, aResource)) {
type = "Bag";
container = this.cUtils.MakeBag(aDs, aResource);
}
var result = aIndent + "<RDF:" + type;
if (!gRDF.IsAnonymousResource(aResource))
result += " about=\"" + this.escapeEntities(aResource.ValueUTF8) + "\"";
result += ">\n";
if (container)
result += this.serializeContainerItems(aDs, container, aIndent + this.INDENT);
result += this.serializeResourceProperties(aDs, aResource, aIndent + this.INDENT);
result += aIndent + "</RDF:" + type + ">\n";
return result;
}
}
/**
* Parses an RDF style update manifest into an array of update objects.
*
* @param aId
* The ID of the add-on being checked for updates
* @param aUpdateKey
* An optional update key for the add-on
* @param aRequest
* The XMLHttpRequest that has retrieved the update manifest
* @return an array of update objects
* @throws if the update manifest is invalid in any way
*/
function parseRDFManifest(aId, aUpdateKey, aRequest) {
function EM_R(aProp) {
return gRDF.GetResource(PREFIX_NS_EM + aProp);
}
function getValue(aLiteral) {
if (aLiteral instanceof Ci.nsIRDFLiteral)
return aLiteral.Value;
if (aLiteral instanceof Ci.nsIRDFResource)
return aLiteral.Value;
if (aLiteral instanceof Ci.nsIRDFInt)
return aLiteral.Value;
return null;
}
function getProperty(aDs, aSource, aProperty) {
return getValue(aDs.GetTarget(aSource, EM_R(aProperty), true));
}
function getBooleanProperty(aDs, aSource, aProperty) {
let propValue = aDs.GetTarget(aSource, EM_R(aProperty), true);
if (!propValue)
return undefined;
return getValue(propValue) == "true";
}
function getRequiredProperty(aDs, aSource, aProperty) {
let value = getProperty(aDs, aSource, aProperty);
if (!value)
throw Components.Exception("Update manifest is missing a required " + aProperty + " property.");
return value;
}
let rdfParser = Cc["@mozilla.org/rdf/xml-parser;1"].
createInstance(Ci.nsIRDFXMLParser);
let ds = Cc["@mozilla.org/rdf/datasource;1?name=in-memory-datasource"].
createInstance(Ci.nsIRDFDataSource);
rdfParser.parseString(ds, aRequest.channel.URI, aRequest.responseText);
// Differentiating between add-on types is deprecated
let extensionRes = gRDF.GetResource(PREFIX_EXTENSION + aId);
let themeRes = gRDF.GetResource(PREFIX_THEME + aId);
let itemRes = gRDF.GetResource(PREFIX_ITEM + aId);
let addonRes = ds.ArcLabelsOut(extensionRes).hasMoreElements() ? extensionRes
: ds.ArcLabelsOut(themeRes).hasMoreElements() ? themeRes
: itemRes;
// If we have an update key then the update manifest must be signed
if (aUpdateKey) {
let signature = getProperty(ds, addonRes, "signature");
if (!signature)
throw Components.Exception("Update manifest for " + aId + " does not contain a required signature");
let serializer = new RDFSerializer();
let updateString = null;
try {
updateString = serializer.serializeResource(ds, addonRes);
}
catch (e) {
throw Components.Exception("Failed to generate signed string for " + aId + ". Serializer threw " + e,
e.result);
}
let result = false;
try {
let verifier = Cc["@mozilla.org/security/datasignatureverifier;1"].
getService(Ci.nsIDataSignatureVerifier);
result = verifier.verifyData(updateString, signature, aUpdateKey);
}
catch (e) {
throw Components.Exception("The signature or updateKey for " + aId + " is malformed." +
"Verifier threw " + e, e.result);
}
if (!result)
throw Components.Exception("The signature for " + aId + " was not created by the add-on's updateKey");
}
let updates = ds.GetTarget(addonRes, EM_R("updates"), true);
// A missing updates property doesn't count as a failure, just as no avialable
// update information
if (!updates) {
logger.warn("Update manifest for " + aId + " did not contain an updates property");
return [];
}
if (!(updates instanceof Ci.nsIRDFResource))
throw Components.Exception("Missing updates property for " + addonRes.Value);
let cu = Cc["@mozilla.org/rdf/container-utils;1"].
getService(Ci.nsIRDFContainerUtils);
if (!cu.IsContainer(ds, updates))
throw Components.Exception("Updates property was not an RDF container");
let results = [];
let ctr = Cc["@mozilla.org/rdf/container;1"].
createInstance(Ci.nsIRDFContainer);
ctr.Init(ds, updates);
let items = ctr.GetElements();
while (items.hasMoreElements()) {
let item = items.getNext().QueryInterface(Ci.nsIRDFResource);
let version = getProperty(ds, item, "version");
if (!version) {
logger.warn("Update manifest is missing a required version property.");
continue;
}
logger.debug("Found an update entry for " + aId + " version " + version);
let targetApps = ds.GetTargets(item, EM_R("targetApplication"), true);
while (targetApps.hasMoreElements()) {
let targetApp = targetApps.getNext().QueryInterface(Ci.nsIRDFResource);
let appEntry = {};
try {
appEntry.id = getRequiredProperty(ds, targetApp, "id");
appEntry.minVersion = getRequiredProperty(ds, targetApp, "minVersion");
appEntry.maxVersion = getRequiredProperty(ds, targetApp, "maxVersion");
}
catch (e) {
logger.warn(e);
continue;
}
let result = {
id: aId,
version: version,
multiprocessCompatible: getBooleanProperty(ds, item, "multiprocessCompatible"),
updateURL: getProperty(ds, targetApp, "updateLink"),
updateHash: getProperty(ds, targetApp, "updateHash"),
updateInfoURL: getProperty(ds, targetApp, "updateInfoURL"),
strictCompatibility: !!getBooleanProperty(ds, targetApp, "strictCompatibility"),
targetApplications: [appEntry]
};
if (result.updateURL && AddonManager.checkUpdateSecurity &&
result.updateURL.substring(0, 6) != "https:" &&
(!result.updateHash || result.updateHash.substring(0, 3) != "sha")) {
logger.warn("updateLink " + result.updateURL + " is not secure and is not verified" +
" by a strong enough hash (needs to be sha1 or stronger).");
delete result.updateURL;
delete result.updateHash;
}
results.push(result);
}
}
return results;
}
/**
* Starts downloading an update manifest and then passes it to an appropriate
* parser to convert to an array of update objects
*
* @param aId
* The ID of the add-on being checked for updates
* @param aUpdateKey
* An optional update key for the add-on
* @param aUrl
* The URL of the update manifest
* @param aObserver
* An observer to pass results to
*/
function UpdateParser(aId, aUpdateKey, aUrl, aObserver) {
this.id = aId;
this.updateKey = aUpdateKey;
this.observer = aObserver;
this.url = aUrl;
let requireBuiltIn = true;
try {
requireBuiltIn = Services.prefs.getBoolPref(PREF_UPDATE_REQUIREBUILTINCERTS);
}
catch (e) {
}
logger.debug("Requesting " + aUrl);
try {
this.request = Cc["@mozilla.org/xmlextras/xmlhttprequest;1"].
createInstance(Ci.nsIXMLHttpRequest);
this.request.open("GET", this.url, true);
this.request.channel.notificationCallbacks = new CertUtils.BadCertHandler(!requireBuiltIn);
this.request.channel.loadFlags |= Ci.nsIRequest.LOAD_BYPASS_CACHE;
// Prevent the request from writing to cache.
this.request.channel.loadFlags |= Ci.nsIRequest.INHIBIT_CACHING;
this.request.overrideMimeType("text/xml");
this.request.setRequestHeader("Moz-XPI-Update", "1", true);
this.request.timeout = TIMEOUT;
var self = this;
this.request.addEventListener("load", function loadEventListener(event) { self.onLoad() }, false);
this.request.addEventListener("error", function errorEventListener(event) { self.onError() }, false);
this.request.addEventListener("timeout", function timeoutEventListener(event) { self.onTimeout() }, false);
this.request.send(null);
}
catch (e) {
logger.error("Failed to request update manifest", e);
}
}
UpdateParser.prototype = {
id: null,
updateKey: null,
observer: null,
request: null,
url: null,
/**
* Called when the manifest has been successfully loaded.
*/
onLoad: function UP_onLoad() {
let request = this.request;
this.request = null;
this._doneAt = new Error("place holder");
let requireBuiltIn = true;
try {
requireBuiltIn = Services.prefs.getBoolPref(PREF_UPDATE_REQUIREBUILTINCERTS);
}
catch (e) {
}
try {
CertUtils.checkCert(request.channel, !requireBuiltIn);
}
catch (e) {
this.notifyError(AddonUpdateChecker.ERROR_DOWNLOAD_ERROR);
return;
}
if (!Components.isSuccessCode(request.status)) {
logger.warn("Request failed: " + this.url + " - " + request.status);
this.notifyError(AddonUpdateChecker.ERROR_DOWNLOAD_ERROR);
return;
}
let channel = request.channel;
if (channel instanceof Ci.nsIHttpChannel && !channel.requestSucceeded) {
logger.warn("Request failed: " + this.url + " - " + channel.responseStatus +
": " + channel.responseStatusText);
this.notifyError(AddonUpdateChecker.ERROR_DOWNLOAD_ERROR);
return;
}
let xml = request.responseXML;
if (!xml || xml.documentElement.namespaceURI == XMLURI_PARSE_ERROR) {
logger.warn("Update manifest was not valid XML");
this.notifyError(AddonUpdateChecker.ERROR_PARSE_ERROR);
return;
}
// We currently only know about RDF update manifests
if (xml.documentElement.namespaceURI == PREFIX_NS_RDF) {
let results = null;
try {
results = parseRDFManifest(this.id, this.updateKey, request);
}
catch (e) {
logger.warn("onUpdateCheckComplete failed to parse RDF manifest", e);
this.notifyError(AddonUpdateChecker.ERROR_PARSE_ERROR);
return;
}
if ("onUpdateCheckComplete" in this.observer) {
try {
this.observer.onUpdateCheckComplete(results);
}
catch (e) {
logger.warn("onUpdateCheckComplete notification failed", e);
}
}
else {
logger.warn("onUpdateCheckComplete may not properly cancel", new Error("stack marker"));
}
return;
}
logger.warn("Update manifest had an unrecognised namespace: " + xml.documentElement.namespaceURI);
this.notifyError(AddonUpdateChecker.ERROR_UNKNOWN_FORMAT);
},
/**
* Called when the request times out
*/
onTimeout: function() {
this.request = null;
this._doneAt = new Error("Timed out");
logger.warn("Request for " + this.url + " timed out");
this.notifyError(AddonUpdateChecker.ERROR_TIMEOUT);
},
/**
* Called when the manifest failed to load.
*/
onError: function UP_onError() {
if (!Components.isSuccessCode(this.request.status)) {
logger.warn("Request failed: " + this.url + " - " + this.request.status);
}
else if (this.request.channel instanceof Ci.nsIHttpChannel) {
try {
if (this.request.channel.requestSucceeded) {
logger.warn("Request failed: " + this.url + " - " +
this.request.channel.responseStatus + ": " +
this.request.channel.responseStatusText);
}
}
catch (e) {
logger.warn("HTTP Request failed for an unknown reason");
}
}
else {
logger.warn("Request failed for an unknown reason");
}
this.request = null;
this._doneAt = new Error("UP_onError");
this.notifyError(AddonUpdateChecker.ERROR_DOWNLOAD_ERROR);
},
/**
* Helper method to notify the observer that an error occured.
*/
notifyError: function UP_notifyError(aStatus) {
if ("onUpdateCheckError" in this.observer) {
try {
this.observer.onUpdateCheckError(aStatus);
}
catch (e) {
logger.warn("onUpdateCheckError notification failed", e);
}
}
},
/**
* Called to cancel an in-progress update check.
*/
cancel: function UP_cancel() {
if (!this.request) {
logger.error("Trying to cancel already-complete request", this._doneAt);
return;
}
this.request.abort();
this.request = null;
this._doneAt = new Error("UP_cancel");
this.notifyError(AddonUpdateChecker.ERROR_CANCELLED);
}
};
/**
* Tests if an update matches a version of the application or platform
*
* @param aUpdate
* The available update
* @param aAppVersion
* The application version to use
* @param aPlatformVersion
* The platform version to use
* @param aIgnoreMaxVersion
* Ignore maxVersion when testing if an update matches. Optional.
* @param aIgnoreStrictCompat
* Ignore strictCompatibility when testing if an update matches. Optional.
* @param aCompatOverrides
* AddonCompatibilityOverride objects to match against. Optional.
* @return true if the update is compatible with the application/platform
*/
function matchesVersions(aUpdate, aAppVersion, aPlatformVersion,
aIgnoreMaxVersion, aIgnoreStrictCompat,
aCompatOverrides) {
if (aCompatOverrides) {
let override = AddonRepository.findMatchingCompatOverride(aUpdate.version,
aCompatOverrides,
aAppVersion,
aPlatformVersion);
if (override && override.type == "incompatible")
return false;
}
if (aUpdate.strictCompatibility && !aIgnoreStrictCompat)
aIgnoreMaxVersion = false;
let result = false;
for (let app of aUpdate.targetApplications) {
if (app.id == Services.appinfo.ID) {
return (Services.vc.compare(aAppVersion, app.minVersion) >= 0) &&
(aIgnoreMaxVersion || (Services.vc.compare(aAppVersion, app.maxVersion) <= 0));
}
#ifdef MOZ_PHOENIX_EXTENSIONS
if (app.id == FIREFOX_ID) {
return (Services.vc.compare(aAppVersion, app.minVersion) >= 0) &&
(aIgnoreMaxVersion || (Services.vc.compare(aAppVersion, app.maxVersion) <= 0));
}
#endif
if (app.id == TOOLKIT_ID) {
result = (Services.vc.compare(aPlatformVersion, app.minVersion) >= 0) &&
(aIgnoreMaxVersion || (Services.vc.compare(aPlatformVersion, app.maxVersion) <= 0));
}
}
return result;
}
this.AddonUpdateChecker = {
// These must be kept in sync with AddonManager
// The update check timed out
ERROR_TIMEOUT: -1,
// There was an error while downloading the update information.
ERROR_DOWNLOAD_ERROR: -2,
// The update information was malformed in some way.
ERROR_PARSE_ERROR: -3,
// The update information was not in any known format.
ERROR_UNKNOWN_FORMAT: -4,
// The update information was not correctly signed or there was an SSL error.
ERROR_SECURITY_ERROR: -5,
// The update was cancelled
ERROR_CANCELLED: -6,
/**
* Retrieves the best matching compatibility update for the application from
* a list of available update objects.
*
* @param aUpdates
* An array of update objects
* @param aVersion
* The version of the add-on to get new compatibility information for
* @param aIgnoreCompatibility
* An optional parameter to get the first compatibility update that
* is compatible with any version of the application or toolkit
* @param aAppVersion
* The version of the application or null to use the current version
* @param aPlatformVersion
* The version of the platform or null to use the current version
* @param aIgnoreMaxVersion
* Ignore maxVersion when testing if an update matches. Optional.
* @param aIgnoreStrictCompat
* Ignore strictCompatibility when testing if an update matches. Optional.
* @return an update object if one matches or null if not
*/
getCompatibilityUpdate: function AUC_getCompatibilityUpdate(aUpdates, aVersion,
aIgnoreCompatibility,
aAppVersion,
aPlatformVersion,
aIgnoreMaxVersion,
aIgnoreStrictCompat) {
if (!aAppVersion)
aAppVersion = Services.appinfo.version;
if (!aPlatformVersion)
aPlatformVersion = Services.appinfo.platformVersion;
for (let update of aUpdates) {
if (Services.vc.compare(update.version, aVersion) == 0) {
if (aIgnoreCompatibility) {
for (let targetApp of update.targetApplications) {
let id = targetApp.id;
#ifdef MOZ_PHOENIX_EXTENSIONS
if (id == Services.appinfo.ID || id == FIREFOX_ID ||
id == TOOLKIT_ID)
#else
if (id == Services.appinfo.ID || id == TOOLKIT_ID)
#endif
return update;
}
}
else if (matchesVersions(update, aAppVersion, aPlatformVersion,
aIgnoreMaxVersion, aIgnoreStrictCompat)) {
return update;
}
}
}
return null;
},
/**
* Returns the newest available update from a list of update objects.
*
* @param aUpdates
* An array of update objects
* @param aAppVersion
* The version of the application or null to use the current version
* @param aPlatformVersion
* The version of the platform or null to use the current version
* @param aIgnoreMaxVersion
* When determining compatible updates, ignore maxVersion. Optional.
* @param aIgnoreStrictCompat
* When determining compatible updates, ignore strictCompatibility. Optional.
* @param aCompatOverrides
* Array of AddonCompatibilityOverride to take into account. Optional.
* @return an update object if one matches or null if not
*/
getNewestCompatibleUpdate: function AUC_getNewestCompatibleUpdate(aUpdates,
aAppVersion,
aPlatformVersion,
aIgnoreMaxVersion,
aIgnoreStrictCompat,
aCompatOverrides) {
if (!aAppVersion)
aAppVersion = Services.appinfo.version;
if (!aPlatformVersion)
aPlatformVersion = Services.appinfo.platformVersion;
let blocklist = Cc["@mozilla.org/extensions/blocklist;1"].
getService(Ci.nsIBlocklistService);
let newest = null;
for (let update of aUpdates) {
if (!update.updateURL)
continue;
let state = blocklist.getAddonBlocklistState(update, aAppVersion, aPlatformVersion);
if (state != Ci.nsIBlocklistService.STATE_NOT_BLOCKED)
continue;
if ((newest == null || (Services.vc.compare(newest.version, update.version) < 0)) &&
matchesVersions(update, aAppVersion, aPlatformVersion,
aIgnoreMaxVersion, aIgnoreStrictCompat,
aCompatOverrides)) {
newest = update;
}
}
return newest;
},
/**
* Starts an update check.
*
* @param aId
* The ID of the add-on being checked for updates
* @param aUpdateKey
* An optional update key for the add-on
* @param aUrl
* The URL of the add-on's update manifest
* @param aObserver
* An observer to notify of results
* @return UpdateParser so that the caller can use UpdateParser.cancel() to shut
* down in-progress update requests
*/
checkForUpdates: function AUC_checkForUpdates(aId, aUpdateKey, aUrl, aObserver) {
// Exclude default theme
if (aId != "{972ce4c6-7e08-4474-a285-3208198ce6fd}")
return new UpdateParser(aId, aUpdateKey, aUrl, aObserver);
}
};