RSSHub/lib/routes/18comic/utils.ts

import { load } from 'cheerio';
import CryptoJS from 'crypto-js';

import { config } from '@/config';
import ConfigNotFoundError from '@/errors/types/config-not-found';
import cache from '@/utils/cache';
import got from '@/utils/got';
import md5 from '@/utils/md5';
import { parseDate } from '@/utils/parse-date';

import { renderDescription } from './templates/description';

const defaultDomain = 'jmcomic1.me';
// list of address: https://jmcomic2.bet
const allowDomain = new Set(['18comic.vip', '18comic.org', 'jmcomic.me', 'jmcomic1.me', 'jm-comic3.art', 'jm-comic.club', 'jm-comic2.ark']);

const apiDomain = 'www.cdnhth.cc';

const getRootUrl = (domain) => {
    if (!config.feature.allow_user_supply_unsafe_domain && !allowDomain.has(domain)) {
        throw new ConfigNotFoundError(`This RSS is disabled unless 'ALLOW_USER_SUPPLY_UNSAFE_DOMAIN' is set to 'true'.`);
    }

    return `https://${domain}`;
};

const apiMapCategory = (category) => {
    switch (category) {
        case 'another':
            return '其他漫畫';
        case 'doujin':
            return '同人';
        case 'hanman':
            return '韓漫';
        case 'meiman':
            return '美漫';
        case 'short':
            return '短篇';
        case 'single':
            return '單本';
        default:
            return null;
    }
};

const getApiUrl = () => `https://${apiDomain}`;

// using api to fetch data
const processApiItems = async (apiUrl: string) => {
    apiUrl = apiUrl.replace(/\?$/, '');
    // get timestamp using javascript native api
    const ts = Date.now();
    const tokenParam = `${ts},1.7.5`;
    // md5 from {token ts + "18comicAPP"
    let token = `${ts}18comicAPP`;
    token = md5(token);

    const response = await got(apiUrl, {
        headers: {
            token,
            tokenparam: tokenParam,
        },
    });

    // decode base64
    const encryptedWordArray = CryptoJS.enc.Base64.parse(response.data.data);

    // to md5 hex string , this string must be 32 bytes , because it is used as key for AES-256
    const md5HexStr = CryptoJS.MD5(ts + '185Hcomic3PAPP7R').toString(); // hex 字串

    // convert string to WordArray that can be used as key for AES
    const key = CryptoJS.enc.Utf8.parse(md5HexStr); // 32 bytes => AES-256

    // create a CipherParams object from the encrypted WordArray
    const cipherParams = CryptoJS.lib.CipherParams.create({
        ciphertext: encryptedWordArray,
    });

    // decrypt the CipherParams object using AES in ECB mode with PKCS7 padding
    const decrypted = CryptoJS.AES.decrypt(cipherParams, key, {
        mode: CryptoJS.mode.ECB,
        padding: CryptoJS.pad.Pkcs7,
    });

    // convert the decrypted WordArray to a UTF-8 string , the result is a JSON string
    const resultJson = decrypted.toString(CryptoJS.enc.Utf8);

    const result = JSON.parse(resultJson);
    return result;
};

const ProcessItems = async (ctx, currentUrl, rootUrl) => {
    currentUrl = currentUrl.replace(/\?$/, '');

    const response = await got(currentUrl);

    const $ = load(response.data);

    let items = $('.video-title')
        .slice(0, ctx.req.query('limit') ? Number.parseInt(ctx.req.query('limit')) : 20)
        .toArray()
        .map((item) => {
            item = $(item);

            return {
                title: item.text().trim(),
                link: `${rootUrl}${item.prev().find('a').attr('href')}`,
                guid: `18comic:${item.prev().find('a').attr('href')}`,
            };
        });

    items = await Promise.all(
        items.map((item) =>
            cache.tryGet(item.guid, async () => {
                const detailResponse = await got(item.link);

                const content = load(detailResponse.data);

                item.pubDate = parseDate(content('div[itemprop="datePublished"]').first().attr('content'));
                item.updated = parseDate(content('div[itemprop="datePublished"]').last().attr('content'));
                item.category = content('span[data-type="tags"]')
                    .first()
                    .find('a')
                    .toArray()
                    .map((c) => $(c).text());
                item.author = content('span[data-type="author"]')
                    .first()
                    .find('a')
                    .toArray()
                    .map((a) => $(a).text())
                    .join(', ');
                item.description = renderDescription({
                    introduction: content('#intro-block .p-t-5').text(),
                    images: content('.img_zoom_img img')
                        .toArray()
                        .map((image) => content(image).attr('data-original')),
                    cover: content('.thumb-overlay img').first().attr('src'),
                    category: item.category,
                });

                return item;
            })
        )
    );

    return {
        title: $('title').text(),
        link: currentUrl,
        item: items,
        description: $('meta[property="og:description"]').attr('content'),
        allowEmpty: true,
    };
};

export { apiMapCategory, defaultDomain, getApiUrl, getRootUrl, processApiItems, ProcessItems };