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add version specifier to URL preview cache

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Hazelnoot 2025-05-05 09:24:28 -04:00
parent 80819f03e7
commit 387efac23f
1 changed files with 9 additions and 6 deletions
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15
packages/backend/src/server/web/UrlPreviewService.ts
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@ -30,6 +30,9 @@ export type LocalSummalyResult = SummalyResult & {
haveNoteLocally?: boolean; haveNoteLocally?: boolean;
}; };
// Increment this to invalidate cached previews after a major change.
const cacheFormatVersion = 1;
@Injectable() @Injectable()
export class UrlPreviewService { export class UrlPreviewService {
private logger: Logger; private logger: Logger;
@ -119,10 +122,10 @@ export class UrlPreviewService {
}; };
} }
const key = `${url}@${lang}`; const cacheKey = `${url}@${lang}@${cacheFormatVersion}`;
const cached = await this.previewCache.get(key); const cached = await this.previewCache.get(cacheKey);
if (cached !== undefined) { if (cached !== undefined) {
this.logger.info(`Returning cache preview of ${key}`); this.logger.info(`Returning cache preview of ${cacheKey}`);
// Cache 7days // Cache 7days
reply.header('Cache-Control', 'max-age=604800, immutable'); reply.header('Cache-Control', 'max-age=604800, immutable');
@ -134,8 +137,8 @@ export class UrlPreviewService {
} }
this.logger.info(this.meta.urlPreviewSummaryProxyUrl this.logger.info(this.meta.urlPreviewSummaryProxyUrl
? `(Proxy) Getting preview of ${key} ...` ? `(Proxy) Getting preview of ${cacheKey} ...`
: `Getting preview of ${key} ...`); : `Getting preview of ${cacheKey} ...`);
try { try {
const summary: LocalSummalyResult = this.meta.urlPreviewSummaryProxyUrl const summary: LocalSummalyResult = this.meta.urlPreviewSummaryProxyUrl
@ -174,7 +177,7 @@ export class UrlPreviewService {
await this.inferActivityPubLink(summary); await this.inferActivityPubLink(summary);
} }
this.previewCache.set(key, summary); this.previewCache.set(cacheKey, summary);
// Cache 7days // Cache 7days
reply.header('Cache-Control', 'max-age=604800, immutable'); reply.header('Cache-Control', 'max-age=604800, immutable');