DIYgod/RSSHub · error · InvalidParameterError

Invalid user

Error message

Invalid user

What it means

Thrown by the itch.io devlog route as `InvalidParameterError('Invalid user')` when the `user` path param fails `isValidHost(user)` — i.e. the subdomain-style user id is not a valid hostname. The route builds `https://${user}.itch.io/${id}/devlog`, so `user` must be a syntactically valid host label.

Source

Thrown at lib/routes/itch/devlog.ts:41

        supportPodcast: false,
        supportScihub: false,
    },
    name: 'Developer Logs',
    maintainers: ['nczitzk'],
    handler,
    description: `\`User id\` is the field before \`.itch.io\` in the URL of the corresponding page, e.g. the URL of [The Baby In Yellow Devlog](https://teamterrible.itch.io/the-baby-in-yellow/devlog) is \`https://teamterrible.itch.io/the-baby-in-yellow/devlog\`, where the field before \`.itch.io\` is \`teamterrible\`.

\`Item id\` is the field between \`itch.io\` and \`/devlog\` in the URL of the corresponding page, e.g. the URL for [The Baby In Yellow Devlog](https://teamterrible.itch.io/the-baby-in-yellow/devlog) is \`https://teamterrible.itch.io/the-baby-in-yellow/devlog\`, where the field between \`itch.io\` and \`/devlog\` is \`the-baby-in-yellow\`.

So the route is [\`/itch/devlogs/teamterrible/the-baby-in-yellow\`](https://rsshub.app/itch/devlogs/teamterrible/the-baby-in-yellow).`,
};

async function handler(ctx) {
    const user = ctx.req.param('user') ?? '';
    const id = ctx.req.param('id') ?? '';
    const limit = Number.parseInt(ctx.req.query('limit')) || 20;
    if (!isValidHost(user)) {
        throw new InvalidParameterError('Invalid user');
    }

    const rootUrl = `https://${user}.itch.io/${id}/devlog`;

    const response = await got({
        method: 'get',
        url: rootUrl,
    });

    const $ = load(response.data);

    let items = $('.title')
        .toArray()
        .slice(0, limit)
        .map((item): DataItem => {
            const $item = $(item);

            return {

View on GitHub (pinned to bed535e087)

Solutions

1. Pass only the subdomain portion (the part before `.itch.io`), lowercase, hyphen-separated: `/itch/devlogs/teamterrible/the-baby-in-yellow`.
2. Do not include `https://` or `.itch.io` in the `user` param.
3. Double-check argument order: user comes first, item id second.

Example fix

// before: /itch/devlogs/https://teamterrible.itch.io/the-baby-in-yellow/devlog
// after:  /itch/devlogs/teamterrible/the-baby-in-yellow

if (!isValidHost(user)) throw new InvalidParameterError(`Invalid itch.io user subdomain: '${user}'`);

const isValidItchUser = (u: string) => Boolean(u) && /^[a-z0-9][a-z0-9-]*$/.test(u) && isValidHost(u);

When it happens

Trigger: Request to `/itch/devlogs/:user/:id` where `user` contains invalid hostname characters (underscores, spaces, dots, etc.) or is empty. `isValidHost` rejects it before any HTTP call.

Common situations: Typo in the user slug; user pasted the full URL instead of just the subdomain part; the user field contains uppercase or special characters; the route was called with the game id in the user slot.

Related errors

• Invalid site
• Invalid category
• At least one valid search parameter is required
• 无法检测 Discuz 版本，请在路由中指定版本参数，如 /discuz/x/ 或 /discuz/7/
• 不支持当前Discuz版本.

AI-assisted analysis of DIYgod/RSSHub@bed535e087 (2026-08-12). Data as JSON: /api/errors/239788e66f3ee8a4. Report an issue: GitHub.