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Code Issues Projects Releases Packages Wiki Activity Actions

avoid fetching notes twice in UrlPreviewService

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Hazelnoot 2025-05-05 10:32:06 -04:00
parent 70d75f1d57
commit 633718ffe9
1 changed files with 14 additions and 9 deletions
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23
packages/backend/src/server/web/UrlPreviewService.ts
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@ -160,10 +160,13 @@ export class UrlPreviewService {
summary.thumbnail = this.wrap(summary.thumbnail);
// Summaly cannot always detect links to a fedi post, so do some additional tests to try and find missed cases.
summary.activityPub ??= await this.inferActivityPubLink(summary);
if (!summary.activityPub) {
await this.inferActivityPubLink(summary);
}
if (summary.activityPub) {
summary.haveNoteLocally = !!await this.apDbResolverService.getNoteFromApId(summary.activityPub);
// Avoid duplicate checks in case inferActivityPubLink already set this.
summary.haveNoteLocally ||= !!await this.apDbResolverService.getNoteFromApId(summary.activityPub);
}
// Await this to avoid hammering redis when a bunch of URLs are fetched at once
@ -261,12 +264,14 @@ export class UrlPreviewService {
}
}
private async inferActivityPubLink(summary: LocalSummalyResult): Promise<string | null> {
private async inferActivityPubLink(summary: LocalSummalyResult) {
// Match canonical URI first.
// This covers local and remote links.
const isCanonicalUri = !!await this.apDbResolverService.getNoteFromApId(summary.url);
if (isCanonicalUri) {
return summary.url;
summary.activityPub = summary.url;
summary.haveNoteLocally = true;
return;
}
// Try public URL next.
@ -284,17 +289,17 @@ export class UrlPreviewService {
// Older versions did not validate URL, so do it now to avoid impersonation.
const matchByUrl = urlMatches.find(({ uri }) => this.apUtilityService.haveSameAuthority(uri, summary.url));
if (matchByUrl) {
return matchByUrl.uri;
summary.activityPub = matchByUrl.uri;
summary.haveNoteLocally = true;
return;
}
// Finally, attempt a signed GET in case it's a direct link to an instance with authorized fetch.
const instanceActor = await this.systemAccountService.getInstanceActor();
const remoteObject = await this.apRequestService.signedGet(summary.url, instanceActor).catch(() => null);
if (remoteObject) {
return remoteObject.id;
summary.activityPub = remoteObject.id;
return;
}
// No match :(
return null;
}
}