lib/facebook.js

import got from 'got';
import * as cheerio from 'cheerio';
import { FacebookDlArgsSchema, FacebookDlMediaSchema, FacebookDlSchema } from '../lib/types/facebook-v1.js';
import { DEFAULT_HEADERS } from './constant.js';

export async function facebookdl(url) {
    FacebookDlArgsSchema.parse(arguments);
    const html = await got('https://fdownloader.net/en', {
        headers: {
            ...DEFAULT_HEADERS
        }
    }).text();
    const k_url_search = /k_url_search="(.*?)"/.exec(html)[1];
    const k_exp = /k_exp="(.*?)"/.exec(html)[1];
    const k_token = /k_token="(.*?)"/.exec(html)[1];
    const k_prefix_name = /k_prefix_name="(.*?)"/.exec(html)[1];

    const form = {
        k_exp,
        k_token,
        q: url,
        lang: 'en',
        web: 'fdownloader.net',
        v: 'v2',
        w: ''
    };
    const data = await got.post(k_url_search, {
        headers: {
            ...DEFAULT_HEADERS,
            referer: 'https://fdownloader.net/'
        },
        form
    }).json();

    const $ = cheerio.load(data.data);

    const k_url_convert = /k_url_convert = "(.*?)"/.exec($.html())[1];
    const c_exp = /k_exp = "(.*?)"/.exec($.html())[1];
    const c_token = /c_token = "(.*?)"/.exec($.html())[1];

    const thumbnail = $('.thumbnail > .image-fb > img').attr('src');
    const duration = $('.content > .clearfix > p').text() || undefined;
    const video = $('table.table').eq(0).find('tbody > tr').map((_, el) => {
        const $el = $(el);
        const $td = $el.find('td');
        const quality = $td.eq(0).text();
        const url = $td.eq(2).find('a').attr('href');
        if (url) {
            return {
                quality,
                download: () => Promise.resolve(url)
            };
        }
        // TODO:
        return false;
    }).toArray().filter(Boolean);

    const audio = [];
    const audioUrl = $('#audioUrl').attr('value');
    audio.push({
        quality: '7kbps',
        download: () => Promise.resolve(audioUrl)
    });

    const result = {
        thumbnail,
        duration,
        video,
        audio
    };
    console.log(result);
    return FacebookDlSchema.parse(result);
}

export async function convert(
    url,
    v_id,
    ftype,
    videoUrl,
    videoType,
    videoCodec,
    audioUrl,
    audioType,
    fquality,
    fname,
    exp,
    token
) {
    const data = await got.post(url, {
        form: {
            ftype,
            v_id,
            videoUrl,
            videoType,
            videoCodec,
            audioUrl,
            audioType,
            fquality,
            fname,
            exp,
            token,
            cv: 'v2'
        }
    });
}