Language: TypeScript
Label: safe
CWE: CWE-918 \u2014 Server-Side Request Forgery (SSRF)
The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination.

Code:
module.exports = async (ctx) => {
    const pub = ctx.params.pub;
    const jrn = ctx.params.jrn;
    const host = `https://${pub}.scitation.org`;
    const jrnlUrl = `${host}/toc/${jrn}/current?size=all`;
    if (!isValidHost(pub)) {
        throw Error('Invalid pub');
    }

    // use Puppeteer due to the obstacle by cloudflare challenge
    const browser = await require('@/utils/puppeteer')();

    const { jrnlName, list } = await ctx.cache.tryGet(
        jrnlUrl,
        async () => {
            const response = await puppeteerGet(jrnlUrl, browser);
            const $ = cheerio.load(response);
            const jrnlName = $('.header-journal-title').text();
            const list = $('.card')
                .toArray()
                .map((item) => {
                    $(item).find('.access-text').remove();
                    const title = $(item).find('.hlFld-Title').text();
                    const authors = $(item).find('.entryAuthor.all').text();
                    const img = $(item).find('img').attr('src');
                    const link = $(item).find('.ref.nowrap').attr('href');
                    const doi = link.replace('/doi/full/', '');
                    const description = renderDesc(title, authors, doi, img);
                    return {
                        title,
                        link,
                        doi,
                        description,
                    };
                });
            return {
                jrnlName,
                list,
            };
        },
        config.cache.routeExpire,
        false
    );

    browser.close();

    ctx.state.data = {
        title: jrnlName,
        link: jrnlUrl,
        item: list,
        allowEmpty: true,
    };
};