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Fix race handling contact sync with verified info (#1419)

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When processing a contact sync with embedded identity key verification info, we
were running overlapping async fetch/save operations on the same conversation
model, causing a race that tends to clobber updates to the contact info.

In this change we extend the application-level contact info handler to block on
a subsequent call to the verification handler, which effectively serializes the
fetch/save calls, and relieves the need for the message receiver to trigger a
seperate event concerning the verification info on contact sync messages.

Fixes #1408

// FREEBIE
This commit is contained in:
Lilia 2017-09-01 16:42:41 +02:00 • committed by Scott Nonnenberg
commit 51cd28bb4a
3 changed files with 14 additions and 26 deletions
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14
js/libtextsecure.js
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@ -38784,10 +38784,7 @@ MessageReceiver.prototype.extend({
throw new Error('Got empty SyncMessage');
}
},
handleVerified: function(envelope, verified, options) {
options = options || {};
_.defaults(options, {viaContactSync: false});
handleVerified: function(envelope, verified) {
var ev = new Event('verified');
ev.confirm = this.removeFromCache.bind(this, envelope);
ev.verified = {
@ -38795,7 +38792,6 @@ MessageReceiver.prototype.extend({
destination: verified.destination,
identityKey: verified.identityKey.toArrayBuffer()
};
ev.viaContactSync = options.viaContactSync;
return this.dispatchAndWait(ev);
},
handleRead: function(envelope, read) {
@ -38825,14 +38821,6 @@ MessageReceiver.prototype.extend({
ev.contactDetails = contactDetails;
results.push(this.dispatchAndWait(ev));
if (contactDetails.verified) {
results.push(this.handleVerified(
envelope,
contactDetails.verified,
{viaContactSync: true}
));
}
contactDetails = contactBuffer.next();
}