fix: handle firehose subscription error reconnect (Close #44) (#46)

This commit is contained in:
Edison Lee 2023-06-16 05:52:04 +08:00 committed by GitHub
parent 3e4011acc2
commit f4b8159264
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
5 changed files with 23 additions and 12 deletions

View File

@ -20,3 +20,6 @@ FEEDGEN_PUBLISHER_DID="did:plc:abcde...."
# Only use this if you want a service did different from did:web
# FEEDGEN_SERVICE_DID="did:plc:abcde..."
# Delay between reconnect attempts to the firehose subscription endpoint (in milliseconds)
FEEDGEN_SUBSCRIPTION_RECONNECT_DELAY=3000

View File

@ -15,4 +15,5 @@ export type Config = {
subscriptionEndpoint: string
serviceDid: string
publisherDid: string
subscriptionReconnectDelay: number
}

View File

@ -15,6 +15,8 @@ const run = async () => {
'wss://bsky.social',
publisherDid:
maybeStr(process.env.FEEDGEN_PUBLISHER_DID) ?? 'did:example:alice',
subscriptionReconnectDelay:
maybeInt(process.env.FEEDGEN_SUBSCRIPTION_RECONNECT_DELAY) ?? 3000,
hostname,
serviceDid,
})

View File

@ -63,7 +63,7 @@ export class FeedGenerator {
async start(): Promise<http.Server> {
await migrateToLatest(this.db)
this.firehose.run()
this.firehose.run(this.cfg.subscriptionReconnectDelay)
this.server = this.app.listen(this.cfg.port, this.cfg.listenhost)
await events.once(this.server, 'listening')
return this.server

View File

@ -36,7 +36,8 @@ export abstract class FirehoseSubscriptionBase {
abstract handleEvent(evt: RepoEvent): Promise<void>
async run() {
async run(subscriptionReconnectDelay: number) {
try {
for await (const evt of this.sub) {
try {
await this.handleEvent(evt)
@ -48,6 +49,10 @@ export abstract class FirehoseSubscriptionBase {
await this.updateCursor(evt.seq)
}
}
} catch (err) {
console.error('repo subscription errored', err)
setTimeout(() => this.run(subscriptionReconnectDelay), subscriptionReconnectDelay)
}
}
async updateCursor(cursor: number) {