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Issue #1909 - Guard against empty update manifest URL

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When installing an incompatible add-on, the add-ons manager checks first if a newer and compatible version of that add-on is available by sending a request either to the AUS or the provided update URL in the manifest.

If there's no update URL in the manifest and if the application does not provide an add-on update URL via preferences, the add-ons manager will error out and fail to notify that the said add-on is incompatible.

This commit addresses that by:
(a) preventing substitutions on the update manifest URL - this throws an error if it's empty; and
(b) failing early in the add-on update checker if the update manifest URL is empty and sends out an error notification
This commit is contained in:
FranklinDM 2022-05-23 21:58:07 +08:00 • committed by roytam1
commit 7b3f9fb7c0
2 changed files with 13 additions and 1 deletions
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8
toolkit/mozapps/extensions/internal/AddonUpdateChecker.jsm
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@ -611,6 +611,14 @@ function UpdateParser(aId, aUpdateKey, aUrl, aObserver) {
let requireBuiltIn = Services.prefs.getBoolPref(PREF_UPDATE_REQUIREBUILTINCERTS, true);
logger.debug("Requesting " + aUrl);
if (!aUrl) {
logger.warn("Request failed: empty update manifest URL");
this._doneAt = new Error("UP_emptyManifestURL");
this.notifyError(AddonUpdateChecker.ERROR_DOWNLOAD_ERROR);
return;
}
try {
this.request = new ServiceRequest();
this.request.open("GET", this.url, true);