前言
- SESSDATA 后面的 ; 分号必需写上，否则请求失败或报错。
- 后面的实现主要是练习下 js 的特性，使用时看接口就好。
- node的控制台刷新显示不清楚，将就下默认的计时器显示。这里设置了回调函数，网页热更新的话，应该可以在相应的位置显示进度。
- 希望各界精英可以留下宝贵的意见，谢谢。
源码
bilibili.js
const axios = require('axios');
const fs = require('fs');
const path = require('path');
const cmd = require('node-cmd');
const process = require('process');
const events = require('events');
(function (g, x, r, h, d, m) {
let e = this
g.req = r
g.reqh = h
g.downl = d
g.bili = m
x = g
m[1](r, h, d)
})(this, module.exports, function (args, resolve, method='get') {
let obj = {'method': method}
if (typeof args === 'object')
for (let k in args)
obj[k] = args[k]
axios(obj).then(function (res_json) {
resolve(res_json)
}).catch(function (error) {
console.log(error)
})
}, function (args=false) {
headers = {"user-agent": "Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/85.0.4183.121 Safari/537.36 "}
if (typeof args === 'object')
for (let k in args)
headers[k] = args[k]
return headers
}, function (u, h, p, r, l) {
return new Promise ((res, err) => {
r({'url': u, 'headers': h, responseType: 'stream'}, d => {
let os = d.headers['content-length'],
e = fs.existsSync(p),
es = 0,
itv = 5000,
m = 'w', w, s, t, o
if (e) {s = fs.statSync(p); if (s.isFile) es = s.size}
if (es == os) {res(true); return}
else if (es > os) fs.unlink(p, function(err) {if(err) throw err})
else {m = 'a'; h.range = `bytes=${es}-`}
w = fs.createWriteStream(p, {flags: m, highWaterMark: 3})
d.data.pipe(w)
o = () => {l(fs.statSync(p).size, os)}
w.on('open', () => {console.log('[ Open ]', p);t = setInterval(function(){o()}, itv);})
w.on('ready', () => {/*console.log('Ready');*/})
w.on('finish', () => {o();res(true);console.log('[ Finish ]', p)})
w.on('close', () => {clearInterval(t);console.log('[ close ]', p)})
w.on('error', () => {res(false);clearInterval(t);console.log('[ Error ]', p)})
})
})
}, {1: function (r, h, d) {
let e = this
e.ptc = 'https'
e.sn = 'www'
e.dmn = 'bilibili.com'
e.hn = [e.sn, e.dmn].join('.')
e.r = r
e.h = h
e.l = d
e.clog = console.log
e.c = (s, c) => {
let i = s.search(c)
return i == -1 ? s : s.substring(i+c.length)
}
e.mn = u => {
let c = e.c(u, e.hn)
switch (c.substring(0, c.lastIndexOf('/'))) {
case '/video': return 0
case '/bangumi/play': return 1
default: return -1
}
}
e.ma = n => {
switch (n) {
case 0: return 'https://api.bilibili.com/x/player/playurl'
case 1: return 'https://api.bilibili.com/pgc/player/web/playurl'
default: return -1
}
}
}, 2: function (u, g=true) {
let e = this, m = e.mn(u),
c = c => {
let re = /window.__INITIAL_STATE__=.*?;\(function/,
pl = "window.__INITIAL_STATE__=".length,
nl = ";(function".length,
rl = 0,
r = re.exec(c)
if (r == null) return null
rl = r[0].length
return JSON.parse(r[0].substring(pl, rl-nl))
}, p = d => {
let i, p, t, s
switch (m) {
case 0: i = d['videoData']; break
case 1: i = d['mediaInfo']; break
}
t = i['title']
s = {'url': u, 'title': t, 'epInfo': []}
switch (m) {
case 0: p = i['pages']; break
case 1: p = d['epList']; break
}
for (let j in p) {
switch (m) {
case 0:
s['epInfo'].push({'cid': p[j]['cid'], 'bvid': i['bvid'],
'id': false, 'ep': j + 1, 'title': p[j]['part']}); break
case 1:
s['epInfo'].push({'cid': p[j]['cid'], 'bvid': p[j]['bvid'],
'id': p[j]['id'], 'ep': parseInt(j) + 1, 'title': p[j]['longTitle']}); break
}
}
return s
}, d = new Promise((res, err) => {
e.r({"url": u, "headers": e.h()}, r => {
res(g?p(c(r.data)):c(r.data))
})
})
e.d = () => d
return d
}, 3: function (u, e, f, b, c, i=false, sa='') {
let t = this,
h = t.h({"cookie": `SESSDATA=${sa};`, "referer": u}),
p = {"otype": "json", "qn": 16, "fnval": f, "cid": c, "bvid": b},
d = j => {
let r = j['result']
if (r == undefined) r = j['data']
if (r['durl'] != undefined) return [r['durl'][0]['url']]
else if (r['dash'] != undefined) {
let d = r['dash'],
v = d['video'],
a = d['audio'][0]
for (let i of v)
if (i['id'] == e)
{v = i; break}
return [v['base_url'], a['base_url']]
} else return false
},
hc = (q, r) => {
if (r.findIndex(r=>r==q) == -1)
q > r[0] ? p['qn'] = r[0] : q < r[r.length-1] ? p['qn'] = r[r.length-1] : p['qn'] = q
e = p['qn']
}
if (i) p['ep_id'] = i
return new Promise((res, err) => {
t.r({'url': t.ma(t.mn(u)), 'headers': h, 'params': p}, r => {
status = r.data['code'] == 0
if (status) {
let aq = r.data.data.accept_quality,
af = r.data.data.accept_format
hc(e, aq)
t.r({'url': t.ma(t.mn(u)), 'headers': h, 'params': p}, r => {
status = r.data['code'] == 0
if (status) res(d(r.data))
else err([u, h, p])
})
} else console.log(t.ma(t.mn(u)), '[ 请求失败 ]')
})
})
}, 4: function (u, r, p, l=(e, o)=>{console.log(`${parseInt(e/o*100)}%`)}) {
let e = this
h = e.h({"accept": "*/*",
"accept-encoding": "identity",
"accept-language": "zh-CN,zh;q=0.9",
"origin": "https://www.bilibili.com",
"range": "bytes=0-",
"referer": r})
e.clog(p, '>>>>>>>>', 'Loading!')
return new Promise((res, err) => {
e.l(u, h, p, e.r, l).then((r, e) => {
res(r)
})
})
}, 5: function (p, v, a, f) {
return new Promise((r, e) => {
process.chdir(p)
cmd.run(`ffmpeg -i ${v} -i ${a} -codec copy ${f}`,
function(err, data, stderr){
let s = err ? false : true
r(s); e(err)
console.log(data)
})
})
}, 6: function (u, p='./', ep=64, fnv= 80, f=(n, t)=>`${n}.${t}`) {
let t = this
t[2](u).then(r => {
let d = r['epInfo'],
dn = r['title'],
e = fs.existsSync(p),
/*
这里比较建议使用 string 的 replace(正则公式，替换字符)
s = s.replace(/[^[\\\/:*?<>|\s]]/g, '_')
*/
pfn = (s, sig='_') => {
let a = ['\\', '/', ':', '*', '?', '<', '>', '|', ' ']
s = s.split('')
for (let i in s)
if (a.findIndex(r=>r==s[i]) == 1) s[i] = sig
return s.join('')
}
if (e) {let s = fs.statSync(p); if (!s.isDirectory) fs.mkdirSync(p)}
else {fs.mkdirSync(p)}
p = path.join(p, dn)
if (!fs.existsSync(p)) fs.mkdirSync(p)
d.map(i => {
let fn = f(i['ep'], d.length == 1 && i['title'] == '' ? dn : i['title']),
lfn = `${pfn(fn).split(' ').join('_')}.flv`,
plfn = path.join(p, lfn)
t[3](u, ep, fnv, i['bvid'], i['cid'], i['id']).then(r => {
let l = r.length
switch (l) {
case 1:
t.FileDownload(r[0], u, path.join(p, lfn)); break
case 2:
let v = `v_${i['ep']}.m4s`,
a = `a_${i['ep']}.m4s`,
vp = path.join(p, v),
ap = path.join(p, a),
EventEmitter = new events.EventEmitter(),
delp = () => {
fs.unlink(vp, err => {if (err) console.log(err)})
fs.unlink(ap, err => {if (err) console.log(err)})
}
async function d () {
let vs = await t[4](r[0], u, vp),
va = await t[4](r[1], u, ap)
return vs && va
}
d().then(r => {
let s = fs.existsSync(plfn)
if (r && !s) t[5](p, v, a, lfn).then(l => {
EventEmitter.emit('read', l);
})
})
EventEmitter.on('read', function(res){
//处理异步读取得到的数据
if (res) delp()
else if (!fs.existsSync(plfn)) delp()
})
break
}
}).catch(e => {console.log(e)})
})
})
}
})
bilibili-interface.js
const { bili } = require('./bilibili.js');
class BiliBili {
constructor(){this.sessdata='' }
setSessdata(ps){this.sessdata=ps}
MultiEpisodesInfo(url, parse, callback){bili[2](url, parse).then(r=>{callback(r)})}
MultiEpisodesDownload(url, path, ep, fnval, format){bili[6](url, path, ep, fnval, format)}
VideoAudioJoin(path, video, audio, file){bili[5](path, video, audio, file)}
VideoDownload(url, referer, path, format){bili[4](url, referer, path, format)}
VideoInfo=(url, ep, fnval, bvid, cid, epid=false)=>bili[3](url, ep, fnval, bvid, cid, epid, this.sessdata)
}
module.exports = { BiliBili }
download.js
const { BiliBili } = require('./bilibili-interface.js')
/*
功能类的实例化（主要用于下载，局部页面数据仅供使用）
*/
var b = new BiliBili()
/*
Sessdata 身份验证：存放于 Cookie, 每登录一次，该id会自动变更
*/
b.setSessdata('')
/*
页面基本数据获取，可获取解析前后的数据，parse(true/false)
*/
b.MultiEpisodesInfo('https://www.bilibili.com/bangumi/play/ss33378?t=270', true, r => {
let d = r['epInfo']
/*
获取具体集数(episodes)的视频播放数据，可用于下载
*/
b.VideoInfo('https://www.bilibili.com/bangumi/play/ss33378?t=270', 64, 80, d[2]['bvid'], d[2]['cid'], d[2]['id']).then(o => {
console.log(o)
})
})
/*
视频多p下载, 后面的 n 为p号，t 为各p标题，具体作用是什么格式输出文件名
*/
b.MultiEpisodesDownload('https://www.bilibili.com/video/BV1us411z7uV', './', 64, 80, (n, t) => t)
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