DIYgod/RSSHub · error · Error

Cannot get link

Error message

Cannot get link

What it means

Inside parseListLinkDateItem the code reads element.find('a').attr('href'); if the anchor has no href attribute the scraper cannot build a link and aborts. It indicates the rsgis.whu.edu.cn list HTML no longer matches the expected <li><a href=...> shape.

Source

Thrown at lib/routes/whu/rsgis.ts:112

 * @returns Whether or not weixin post
 */
function checkExternal(link: string): boolean {
    const matchWeixin = link.match(/^((http:\/\/)|(https:\/\/))?([\dA-Za-z]([\dA-Za-z-]{0,61}[\dA-Za-z])?\.)+[A-Za-z]{2,6}(\/)/);
    return !!matchWeixin?.length;
}

/**
 * Get information from a list of paired link and date.
 *
 * @param element
 * @returns A list of RSS meta node.
 */
function parseListLinkDateItem(element: Cheerio<Element>, currentUrl: string) {
    const linkElement = element.find('a');
    const title = linkElement.text();
    const href = linkElement.attr('href');
    if (href === undefined) {
        throw new Error('Cannot get link');
    }
    const external = checkExternal(href);
    const link = external ? href : new URL(href, currentUrl).href;
    const pubDate = element.find('div.date1').text();
    return {
        title,
        link,
        pubDate: timezone(parseDate(pubDate, 'YYYY-MM-DD'), 8),
        description: title,
        external,
    };
}

async function getDetail(item: Post): Promise<DataItem | any> {
    const link = item.link;
    return link
        ? await cache.tryGet(`whu:rsgis:${link}`, async () => {
              if (item.external) {

View on GitHub (pinned to bed535e087)

Solutions

1. Open rsgis.whu.edu.cn and confirm the list markup still uses <a href> inside the queried <li> containers; update the selector if the structure changed.
2. Filter out items where find('a').attr('href') is undefined before calling parseListLinkDateItem rather than throwing.
3. Report the page to the route maintainer (HPDell) with the offending URL.

Example fix

// defensive skip instead of throw
const href = linkElement.attr('href');
if (href === undefined) {
    return null;   // filtered out by a subsequent .filter(Boolean)
}

// Inside parseListLinkDateItem, skip link-less rows instead of throwing
const linkElement = element.find('a');
const href = linkElement.attr('href');
if (href === undefined) return null;   // caller filters nulls

function hasHref(el: Cheerio<Element>): boolean {
    return el.attr('href') !== undefined;
}

const posts = list.toArray()
    .map((item) => {
        try { return parseListLinkDateItem($(item), baseUrl); }
        catch { return null; }
    })
    .filter((x): x is Post => x !== null);

When it happens

Trigger: Any of the list selectors in handleIndex/handlePostList yields an <li> whose <a> lacks href — e.g. a placeholder item, a date-only row, or a site redesign that dropped/renamed the anchor.

Common situations: The school site template changed; a list item is a non-link divider/header; HTML was partially loaded due to network truncation.

Related errors

• Could not locate initials script on page
• Cannot extract __INITIAL_SSR_STATE__
• 无法找到 Body.js 脚本文件
• this route is empty, please check the original site or <a hr
• Unknown type: ${item.type}

AI-assisted analysis of DIYgod/RSSHub@bed535e087 (2026-08-12). Data as JSON: /api/errors/fa3b9933031e8fd9. Report an issue: GitHub.