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Change initial key backup to background

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Alters the APIs used for initial key backup so that the actual upload happens in
the background after all session are marked for backup.
This commit is contained in:
J. Ryan Stinnett
2019-01-09 04:58:29 -06:00
parent 5cfd082b00
commit 25681e888c
2 changed files with 18 additions and 10 deletions
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8
src/client.js
View File

@@ -997,12 +997,16 @@ MatrixClient.prototype.sendKeyBackup = function(roomId, sessionId, version, data
);
};
MatrixClient.prototype.backupAllGroupSessions = function(version) {
/**
* Marks all group sessions as needing to be backed up and schedules them to
* upload in the background as soon as possible.
*/
MatrixClient.prototype.scheduleAllGroupSessionsForBackup = async function() {
if (this._crypto === null) {
throw new Error("End-to-end encryption disabled");
}
return this._crypto.backupAllGroupSessions(version);
await this._crypto.scheduleAllGroupSessionsForBackup();
};
MatrixClient.prototype.isValidRecoveryKey = function(recoveryKey) {

20
src/crypto/index.js
View File

@@ -988,15 +988,17 @@ Crypto.prototype.importRoomKeys = function(keys) {
/**
* Schedules sending all keys waiting to be sent to the backup, if not already
* scheduled. Retries if necessary.
*
* @param {number} maxDelay Maximum delay to wait in ms. 0 means no delay.
*/
Crypto.prototype.scheduleKeyBackupSend = async function() {
Crypto.prototype.scheduleKeyBackupSend = async function(maxDelay = 10000) {
if (this._sendingBackups) return;
try {
// wait between 0 and 10 seconds, to avoid backup
// wait between 0 and `maxDelay` seconds, to avoid backup
// requests from different clients hitting the server all at
// the same time when a new key is sent
const delay = Math.random() * 10000;
const delay = Math.random() * maxDelay;
await Promise.delay(delay);
let numFailures = 0; // number of consecutive failures
while (1) {
@@ -1118,7 +1120,11 @@ Crypto.prototype.backupGroupSession = async function(
this.scheduleKeyBackupSend();
};
Crypto.prototype.backupAllGroupSessions = async function(version) {
/**
* Marks all group sessions as needing to be backed up and schedules them to
* upload in the background as soon as possible.
*/
Crypto.prototype.scheduleAllGroupSessionsForBackup = async function() {
await this._cryptoStore.doTxn(
'readwrite',
[
@@ -1137,10 +1143,8 @@ Crypto.prototype.backupAllGroupSessions = async function(version) {
const remaining = await this._cryptoStore.countSessionsNeedingBackup();
this.emit("crypto.keyBackupSessionsRemaining", remaining);
let numKeysBackedUp;
do {
numKeysBackedUp = await this._backupPendingKeys(KEY_BACKUP_KEYS_PER_REQUEST);
} while (numKeysBackedUp > 0);
// Schedule keys to upload in the background as soon as possible.
this.scheduleKeyBackupSend(0 /* maxDelay */);
};
/* eslint-disable valid-jsdoc */ //https://github.com/eslint/eslint/issues/7307