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better error handling in key backup, cleanup and not overuse observables

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This commit is contained in:
Bruno Windels 2022-01-31 14:37:05 +01:00
parent 7eb0d347f5
commit a757fb3696
1 changed files with 30 additions and 20 deletions
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48
src/matrix/e2ee/megolm/keybackup/KeyBackup.ts
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@ -37,8 +37,11 @@ type Olm = typeof OlmNamespace;
const KEYS_PER_REQUEST = 20;
export class KeyBackup {
public readonly operationInProgress = new ObservableValue<AbortableOperation<Promise<boolean>, Progress> | undefined>(undefined);
public readonly needsNewKey = new ObservableValue(false);
public readonly operationInProgress = new ObservableValue<AbortableOperation<Promise<void>, Progress> | undefined>(undefined);
private _cancelled = false;
private _needsNewKey = false;
private _error?: Error;
constructor(
private readonly backupInfo: BackupInfo,
@ -49,6 +52,10 @@ export class KeyBackup {
private readonly platform: Platform,
) {}
get cancelled(): boolean { return this._cancelled; }
get needsNewKey(): boolean { return this._needsNewKey; }
get error(): Error | undefined { return this._error; }
async getRoomKey(roomId: string, sessionId: string, log: ILogItem): Promise<IncomingRoomKey | undefined> {
const sessionResponse = await this.hsApi.roomKeyForRoomAndSession(this.backupInfo.version, roomId, sessionId, {log}).response();
if (!sessionResponse.session_data) {
@ -69,15 +76,27 @@ export class KeyBackup {
flush(log: ILogItem): void {
if (!this.operationInProgress.get()) {
log.wrapDetached("flush key backup", async log => {
const operation = this._flush(log);
if (this._needsNewKey) {
log.set("needsNewKey", this._needsNewKey);
return;
}
this._cancelled = false;
this._error = undefined;
const operation = this._runFlushOperation(log);
this.operationInProgress.set(operation);
try {
const success = await operation.result;
// stop key backup if the version was changed
if (!success) {
this.needsNewKey.set(true);
}
await operation.result;
} catch (err) {
if (err.name === "HomeServerError" && err.errcode === "M_WRONG_ROOM_KEYS_VERSION") {
log.set("wrong_version", true);
this._needsNewKey = true;
} else {
this._cancelled = true;
// TODO should really also use AbortError in storage
if (err.name !== "AbortError" || (err.name === "StorageError" && err.errcode === "AbortError")) {
this._error = err;
}
}
log.catch(err);
}
this.operationInProgress.set(undefined);
@ -85,7 +104,7 @@ export class KeyBackup {
}
}
private _flush(log: ILogItem): AbortableOperation<Promise<boolean>, Progress> {
private _runFlushOperation(log: ILogItem): AbortableOperation<Promise<void>, Progress> {
return new AbortableOperation(async (setAbortable, setProgress) => {
let total = 0;
let amountFinished = 0;
@ -102,21 +121,12 @@ export class KeyBackup {
const keysNeedingBackup = (await txn.inboundGroupSessions.getFirstNonBackedUpSessions(KEYS_PER_REQUEST))
.map(entry => new StoredRoomKey(entry));
if (keysNeedingBackup.length === 0) {
return true;
return;
}
const payload = await this.encodeKeysForBackup(keysNeedingBackup);
const uploadRequest = this.hsApi.uploadRoomKeysToBackup(this.backupInfo.version, payload, {log});
setAbortable(uploadRequest);
try {
await uploadRequest.response();
} catch (err) {
if (err.name === "HomeServerError" && err.errcode === "M_WRONG_ROOM_KEYS_VERSION") {
log.set("wrong_version", true);
return false;
} else {
throw err;
}
}
await this.markKeysAsBackedUp(keysNeedingBackup, setAbortable);
amountFinished += keysNeedingBackup.length;
setProgress(new Progress(total, amountFinished));