DIYgod/RSSHub · error

Invalid type: . Valid types are

Error message

Invalid type: ${type}. Valid types are: ${validTypes}

What it means

Thrown by the ZJU math route when the numeric `:type` path parameter does not correspond to any key in `categoryMap`. The handler truncates the param to an integer, looks it up in the map, and on a miss throws with the requested type and the full list of valid types for discoverability.

Solutions

1. Read the valid types straight from the error message and use one of them (the route documents a 0–6 table).
2. If you derived the number from somewhere, verify it against the route's category table before requesting.
3. Guard non-numeric input upstream so it doesn't coerce to `NaN`/0 and silently pick the wrong category.

Example fix

// before — out-of-range / non-numeric type
// GET /zju/math/99   -> Invalid type: 99. Valid types are: 0, 1, 2, ...
// GET /zju/math/news -> Invalid type: NaN ...
// after — valid documented type
// GET /zju/math/0

function validateMathType(raw, categoryMap) {
    const type = Math.trunc(Number(raw));
    if (!Number.isFinite(type) || !categoryMap.has(type)) {
        throw new Error(`Invalid type: ${raw}. Valid: ${[...categoryMap.keys()].join(', ')}`);
    }
    return type;
}

function isValidMathType(raw: string, categoryMap: Map<number, unknown>): raw is `${number}` {
    const n = Math.trunc(Number(raw));
    return Number.isFinite(n) && categoryMap.has(n);
}

When it happens

Trigger: The caller requests a `type` value not defined in the math route's `categoryMap` — an out-of-range integer, a non-numeric string that coerces to `NaN`/0, or a category that simply isn't modeled.

Common situations: User guesses a type number outside the documented 0–6 range; passes a category name instead of its numeric code; the URL was constructed with a stale/wrong index. `Math.trunc(Number('abc'))` yielding `NaN` is a common foot-gun.

Related errors

• Invalid type: . Valid types are
• id not allowed
• Invalid category
• Invalid id
• invalid type

AI-assisted analysis of DIYgod/RSSHub@bed535e087 (2026-08-12). Data as JSON: /api/errors/ce2cae4ff11aaebd. Report an issue: GitHub.

Appendix: source

Thrown at lib/routes/zju/math/index.ts:128

        supportPodcast: false,
        supportScihub: false,
    },
    name: '数学科学学院',
    description: `| 重要通知 | 本科生 | 研究生 | 科研 | 教学 | 人事 | 公示 |
| -------- | ------ | ------ | ---- | ---- | ---- | ---- |
| 0        | 1      | 2      | 3    | 4    | 5    | 6    |`,
    maintainers: ['Alex222222222222'],
    handler,
    url: 'www.math.zju.edu.cn',
};

async function handler(ctx: Context) {
    const type = Math.trunc(Number(ctx.req.param('type')));
    const categoryInfo = categoryMap.get(type);

    if (!categoryInfo) {
        const validTypes = [...categoryMap.keys().toArray()].join(', ');
        throw new Error(`Invalid type: ${type}. Valid types are: ${validTypes}`);
    }

    const categoryUrl = new URL(categoryInfo.id, base).href;
    const newsItems = await fetchNewsItemsByCategory(categoryInfo.id);
    const items = await Promise.all(newsItems.map((item) => enrichNewsItemWithDetails(item, categoryUrl)));

    return {
        title: categoryInfo.title,
        link: categoryUrl,
        item: items,
    };
}

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