DIYgod/RSSHub · error · InvalidParameterError

invalid type

Error message

invalid type

What it means

Thrown by the USTC math school route when the `type` path parameter is not found in the internal `map` of valid types. The valid types are `xyxw` (学院新闻), `tzgg` (通知公告), `xsjl` (学术交流), and `xsbg` (学术报告). This is an `InvalidParameterError`, which RSSHub maps to an HTTP 400 response, making it a user-facing validation error rather than a server crash.

Source

Thrown at lib/routes/ustc/math.ts:51

        {
            source: ['math.ustc.edu.cn/'],
            target: '/math',
        },
    ],
    name: '数学科学学院',
    maintainers: ['ne0-wu'],
    handler,
    url: 'math.ustc.edu.cn/',
    description: `| 学院新闻 | 通知公告 | 学术交流 | 学术报告 |
| -------- | -------- | -------- | -------- |
| xyxw     | tzgg     | xsjl     | xsbg     |`,
};

async function handler(ctx) {
    const type = ctx.req.param('type') ?? 'tzgg';
    const info = map.get(type);
    if (!info) {
        throw new InvalidParameterError('invalid type');
    }
    const id = info.id;

    const response = await got(`${host}/${id}/list.htm`);
    const $ = load(response.data);

    let items = $('#wp_news_w6 > .wp_article_list > .list_item')
        .toArray()
        .map((item): DataItem => {
            const elem = $(item);
            const title = elem.find('.Article_Title > a').attr('title');
            let link = elem.find('.Article_Title > a').attr('href');
            link = link!.startsWith('/') ? host + link : link;
            // Assume that the articles are published at 12:00 UTC+8
            const pubDate = timezone(parseDate(elem.find('.Article_PublishDate').text(), 'YYYY-MM-DD'), -4);
            return {
                title: title!,
                pubDate,

View on GitHub (pinned to bed535e087)

Solutions

1. Use one of the four valid type codes: `xyxw`, `tzgg`, `xsjl`, or `xsbg`.
2. Omit the type segment to use the default `tzgg`: `/ustc/math`.
3. Check the route description table in the route metadata for the current valid codes.

Example fix

// before
GET /ustc/math/news
// after
GET /ustc/math/tzgg

const VALID_TYPES = ['xyxw', 'tzgg', 'xsjl', 'xsbg'];
if (!VALID_TYPES.includes(type)) {
    throw new InvalidParameterError(`Invalid type: ${type}. Valid types: ${VALID_TYPES.join(', ')}`);
}

function isValidMathType(type: string): type is 'xyxw' | 'tzgg' | 'xsjl' | 'xsbg' {
    return ['xyxw', 'tzgg', 'xsjl', 'xsbg'].includes(type);
}

When it happens

Trigger: A request to `/ustc/math/:type` where `:type` is not one of `xyxw`, `tzgg`, `xsjl`, or `xsbg`. For example `/ustc/math/news` or `/ustc/math/XSZW`. The parameter defaults to `tzgg` when omitted, so only an explicitly wrong value triggers it.

Common situations: Typo in the type parameter, using an English word instead of the pinyin abbreviation, or an outdated bookmark pointing to a type code that was renamed or removed.

Related errors

• invalid type
• No topic named ${topic}
• 该公众号不存在，有关如何获取公众号 id，详见 https://docs.rsshub.app/routes/new-m
• 不支持指定类型！
• 不支持指定类型！

AI-assisted analysis of DIYgod/RSSHub@bed535e087 (2026-08-12). Data as JSON: /api/errors/46f9e8a67cdea51e. Report an issue: GitHub.