DIYgod/RSSHub · error · Error

Unable to discover the current Locals feed action id.

Error message

Unable to discover the current Locals feed action id.

What it means

Thrown by `resolveActionIds` (lib/routes/locals/feed.ts:276) when the serverApi JS asset was fetched successfully but `extractFeedActionId(assetContent)` returned null. The action id is extracted from the bundle source; a null result means the regex/anchor used to find it no longer matches the current minified code.

Source

Thrown at lib/routes/locals/feed.ts:277

function fetchContentPage(community: string, session: string) {
    return cache.tryGet(`locals:content-page:${community}`, () => ofetch(`${rootUrl}/${community}/feed?mode=content`, { headers: getRequestHeaders(session) }));
}

function resolveActionIds(community: string, session: string) {
    return cache.tryGet(`locals:action-ids:${community}`, async () => {
        const html = await fetchContentPage(community, session);
        const serverApiAsset = extractAssetUrls(html).find((assetUrl) => assetUrl.includes('/serverApi-'));
        if (!serverApiAsset) {
            throw new Error('Unable to locate the current Locals serverApi asset.');
        }

        const assetContent = await ofetch(new URL(serverApiAsset, rootUrl).href, {
            headers: getRequestHeaders(session),
        });
        const serverId = extractFeedActionId(assetContent);

        if (!serverId) {
            throw new Error('Unable to discover the current Locals feed action id.');
        }

        return serverId;
    });
}

function getImage(post: LocalsPost) {
    return post.photos?.[0]?.sizes?.full?.url || post.photos?.[0]?.sizes?.thumb?.url || post.previews?.[0]?.url || post.previews?.[0]?.first_frame_url || post.videos?.[0]?.preview || post.audios?.[0]?.preview;
}

function getTitle(post: LocalsPost) {
    const textFallback = post.text
        ?.replaceAll(/<[^>]+>/g, '\n')
        .split('\n')
        .map((line) => line.trim())
        .find(Boolean);
    return post.title || post.subtitle || textFallback || post.share_url || 'Locals post';
}

View on GitHub (pinned to bed535e087)

Solutions

Fetch the resolved asset URL directly in a browser and grep its source for the current feed action id pattern.
Update `extractFeedActionId`'s regex/anchor to the new identifier.
Cache-bust `locals:action-ids:<community>` after the fix.
Verify `new URL(serverApiAsset, rootUrl).href` resolves to a `.js` document, not HTML.

Example fix

// before: a single fixed regex inside extractFeedActionId that no longer matches
// after: try several known anchor shapes, fall back to scanning numeric ids
function extractFeedActionId(assetContent: string): string | null {
    const patterns = [
        /feedActionId["']?\s*[:=]\s*["'](\d+)["']/,
        /action["']\s*,\s*id["']\s*[:=]\s*(\d+)/,
        /"(\d{6,})"[^}]{0,40}feed/,
    ];
    for (const re of patterns) {
        const m = assetContent.match(re);
        if (m) return m[1];
    }
    return null;
}

Defensive patterns

Strategy: validation

Validate before calling

function feedActionIdParsable(assetContent: string): boolean {
    return extractFeedActionId(assetContent) !== null;
}
if (!feedActionIdParsable(assetContent)) {
    throw new TypeError('Locals serverApi bundle changed; feed action id not found');
}

Type guard

function isActionId(value: string | null | undefined): value is string {
    return typeof value === 'string' && /^\d+$/.test(value);
}

Try / catch

try {
    return await resolveActionIds(community, session);
} catch (e) {
    if (e instanceof Error && /Unable to discover the current Locals feed action id/.test(e.message)) {
        await cache.delete('locals:action-ids:' + community);
        return await resolveActionIds(community, session);
    }
    throw e;
}

Prevention

Maintain multiple anchor regexes in `extractFeedActionId`.
Pin the action-id cache to a short TTL.
Capture a bundle fixture for regression testing.

When it happens

Trigger: The serverApi bundle is re-minified and the literal `extractFeedActionId` searches for (e.g. an action name or numeric id) is gone or renamed; the wrong asset was selected; the asset body is an error/redirect document rather than JS.

Common situations: Locals ships a new server-api version; bundler reorders identifiers; the asset URL resolved relative to `rootUrl` incorrectly and fetched a fallback page.

Related errors

AI-assisted analysis of DIYgod/RSSHub@bed535e087 (2026-08-12). Data as JSON: /api/errors/a647b7838200cae9. Report an issue: GitHub.