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Ensure that we always enqueue in the same order received

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This commit is contained in:
Scott Nonnenberg 2018-08-02 09:24:38 -07:00
parent 1d7987108b
commit baf419b7b6
1 changed files with 6 additions and 1 deletions
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7
libtextsecure/message_receiver.js
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@ -138,6 +138,8 @@ MessageReceiver.prototype.extend({
},
handleRequest(request) {
this.incoming = this.incoming || [];
const lastPromise = _.last(this.incoming);
// We do the message decryption here, instead of in the ordered pending queue,
// to avoid exposing the time it took us to process messages through the time-to-ack.
@ -165,8 +167,11 @@ MessageReceiver.prototype.extend({
}
return this.addToCache(envelope, plaintext).then(
() => {
async () => {
request.respond(200, 'OK');
// To ensure that we queue in the same order we receive messages
await lastPromise;
this.queueEnvelope(envelope);
},
error => {