danmaku/routes/api/bilibili.js

const urlmodule = require('url');
const axios = require('axios');
const got = require('got');
const {inflateRawSync} = require('zlib');

function Bilibili() {
    this.name = 'B站';
    this.domain = 'bilibili.com';
    this.example_urls = [
        'https://www.bilibili.com/video/av170001',
        'https://www.bilibili.com/video/av170001?p=2',
        'https://www.bilibili.com/video/BV17x411w7KC?p=3',
        'https://www.bilibili.com/bangumi/play/ep691614'
    ];

    this.resolve = async (url) => {
        // 相关API
        const api_video_info = "https://api.bilibili.com/x/web-interface/view"
        const api_epid_cid = "https://api.bilibili.com/pgc/view/web/season"
        var q = urlmodule.parse(url, true);
        var path = q.pathname.split('/');
        // 普通投稿视频
        if (url.indexOf('video/') !== -1) {
            // 获取视频分P信息
            const p = q.query.p || 1;
            // 判断是否为旧版av号
            var params = {};
            if (url.indexOf('BV') !== -1) {
                params = {'bvid': path.slice(-1)[0]};
            } else {
                params = {'aid': path.slice(-1)[0].substring(2)};
            }
            response = await axios.get(api_video_info, {params})
            if (response.data.code !== 0) {
                this.error_msg = '获取普通投稿视频信息失败！'
                return
            }
            this.title = response.data.data.title;
            const subtitle = response.data.data.pages[p - 1].part;
            this.title = this.title + '-' + subtitle;
            const cid = response.data.data.pages[p - 1].cid;
            return [`https://comment.bilibili.com/${cid}.xml`];
        } // 番剧
        else if (url.indexOf('bangumi/') !== -1) {
            const epid = path.slice(-1)[0];
            const params = {'ep_id': epid.slice(2)};
            response = await axios.get(api_epid_cid, {params})
            if (response.data.code !== 0) {
                this.error_msg = '获取番剧视频信息失败！'
                return
            }
            for (var i = 0; i < response.data.result.episodes.length; i++) {
                if (response.data.result.episodes[i].id == params.ep_id) {
                    this.title = response.data.result.episodes[i].share_copy;
                    const cid = response.data.result.episodes[i].cid;
                    return [`https://comment.bilibili.com/${cid}.xml`];
                }
            }
        } else {
            this.error_msg = '不支持的B站视频网址，仅支持普通视频(av,bv)、剧集视频(ep)';
        }

    }

    this.parse = async (urls) => {
        // B站使用特殊的压缩方法，需要使用got模块
        const bufferData = await got(urls[0], {
            decompress: false
        }).buffer();
        const content = inflateRawSync(bufferData).toString();
        return content
    }

    this.work = async (url) => {
        urls = await this.resolve(url);
        console.log(this.name,'api lens:',urls.length);
        if (!this.error_msg)
            this.content = await this.parse(urls);
        return {
            title: this.title,
            content: this.content,
            msg: this.error_msg? this.error_msg: 'ok'
        }
    }


}

module.exports = Bilibili

if(!module.parent) {
    const b = new Bilibili();
    b.work(b.example_urls[0]).then(() => {
        console.log(b.content);
        console.log(b.title);
    });
}