DIYgod/RSSHub · warning · Error

Invalid type parameter

Error message

Invalid type parameter

What it means

Thrown by the BUCT (Beijing University of Chemical Technology) 'gr' route when the `type` path parameter does not match either 'jzml' or 'xgzc'. The handler uses a switch statement and falls through to a `default` case that raises a plain `Error('Invalid type parameter')` instead of RSSHub's `InvalidParameterError`, so downstream it surfaces as a generic 500 rather than a clean 400. It is purely an input-validation guard: the value is never sent to the remote server.

Source

Thrown at lib/routes/buct/gr.ts:63

    switch (type) {
        case 'tzgg':
            currentUrl = `${rootUrl}/1392/list.htm`;

            break;

        case 'jzml':
            currentUrl = `${rootUrl}/jzml/list.htm`;

            break;

        case 'xgzc':
            currentUrl = `${rootUrl}/1393/list.htm`;

            break;

        default:
            throw new Error('Invalid type parameter');
    }

    const response = await got.get(currentUrl);

    const $ = load(response.data);
    const list = $('ul.wp_article_list > li.list_item')
        .toArray()
        .map((item): DataItem => ({
            pubDate: $(item).find('.Article_PublishDate').text(),
            title: $(item).find('a').attr('title')!,
            link: `${rootUrl}${$(item).find('a').attr('href')}`,
        }));

    const items = await Promise.all(
        list.map((item) =>
            cache.tryGet(item.link!, async () => {
                const detailResponse = await got.get(item.link);
                const content = load(detailResponse.data);

View on GitHub (pinned to bed535e087)

Solutions

1. Use only the two documented values: `/buct/gr/jzml` or `/buct/gr/xgzc`.
2. If you maintain this route, replace `throw new Error(...)` with `throw new InvalidParameterError('Invalid type parameter')` and enumerate allowed values in the route `description` table.
3. Verify the param against the switch's case labels (jzml, xgzc) before constructing the request.

Example fix

// before
throw new Error('Invalid type parameter');
// after
import InvalidParameterError from '@/errors/types/invalid-parameter';
throw new InvalidParameterError('Invalid type parameter. Supported: jzml, xgzc');

const BUCT_GR_TYPES = ['jzml', 'xgzc'] as const;
function validateBuctType(type: string): void {
    if (!BUCT_GR_TYPES.includes(type as any)) {
        throw new Error(`Invalid type '${type}'. Use one of: ${BUCT_GR_TYPES.join(', ')}`);
    }
}

const BUCT_GR_TYPES = ['jzml', 'xgzc'] as const;
type BuctGrType = typeof BUCT_GR_TYPES[number];
function isBuctGrType(v: string): v is BuctGrType {
    return (BUCT_GR_TYPES as readonly string[]).includes(v);
}

When it happens

Trigger: Requesting `/buct/gr/<anything-other-than-jzml-or-xgzc>`, e.g. `/buct/gr/tzgg`, `/buct/gr/news`, `/buct/gr/` (empty). Any path segment that the switch does not explicitly case.

Common situations: Copying a type value from a different BUCT route (e.g. the `bupt/jwc` route uses tzgg/xwzx), outdated third-party docs listing removed categories, URL-encoding artifacts, or a trailing slash producing an empty param.

Related errors

• Invalid type parameter
• Invalid category: ${category}
• Unsupported region code: ${region}
• Unsupported key
• Unknown type: ${type}

AI-assisted analysis of DIYgod/RSSHub@bed535e087 (2026-08-12). Data as JSON: /api/errors/f8276ecb01f5a3e7. Report an issue: GitHub.