jeblove

@lazyyz 应该是的，毕竟得靠 cf 服务器中转流量

我用 johngong/baidunetdisk:latest
非会员有 30 秒还是一分钟加速下载，下载不大的文件都是趁它不注意一下子下完，偏大的文件就慢慢挂着。

感谢，用了下发现不能拉取 dockerhub 官方镜像（如 node 、mariadb ），正常输入
```
docker pull 域名/node
```
实际上应该为
```
docker pull 域名/library/node
```
这样有些不太方便

加上判断是否官方镜像，修改调试了些时间，成功可用
```
'use strict'

const hub_host = 'registry-1.docker.io'
const auth_url = 'https://auth.docker.io'
const workers_url = 'https://dh.jeblove.com'
/**
* static files (404.html, sw.js, conf.js)
*/

/** @type {RequestInit} */
const PREFLIGHT_INIT = {
// status: 204,
headers: new Headers({
'access-control-allow-origin': '*',
'access-control-allow-methods': 'GET,POST,PUT,PATCH,TRACE,DELETE,HEAD,OPTIONS',
'access-control-max-age': '1728000',
}),
}

/**
* @param {any} body
* @param {number} status
* @param {Object<string, string>} headers
*/
function makeRes(body, status = 200, headers = {}) {
headers['access-control-allow-origin'] = '*'
return new Response(body, {status, headers})
}


/**
* @param {string} urlStr
*/
function newUrl(urlStr) {
try {
return new URL(urlStr)
} catch (err) {
return null
}
}


addEventListener('fetch', e => {
const ret = fetchHandler(e)
.catch(err => makeRes('cfworker error:\n' + err.stack, 502))
e.respondWith(ret)
})


/**
* @param {FetchEvent} e
*/
async function fetchHandler(e) {
const getReqHeader = (key) => e.request.headers.get(key);

let url = new URL(e.request.url);

// 修改 pre head get 请求
// 是否含有 %2F ，用于判断是否具有用户名与仓库名之间的连接符
// 同时检查 %3A 的存在
if (!/%2F/.test(url.search) && /%3A/.test(url.toString())) {
let modifiedUrl = url.toString().replace(/%3A(?=.*?&)/, '%3Alibrary%2F');
url = new URL(modifiedUrl);
console.log(`handle_url: ${url}`)
}

if (url.pathname === '/token') {
let token_parameter = {
headers: {
'Host': 'auth.docker.io',
'User-Agent': getReqHeader("User-Agent"),
'Accept': getReqHeader("Accept"),
'Accept-Language': getReqHeader("Accept-Language"),
'Accept-Encoding': getReqHeader("Accept-Encoding"),
'Connection': 'keep-alive',
'Cache-Control': 'max-age=0'
}
};
let token_url = auth_url + url.pathname + url.search
return fetch(new Request(token_url, e.request), token_parameter)
}

// 修改 head 请求
if (/^\/v2\/[^/]+\/[^/]+\/[^/]+$/.test(url.pathname) && !/^\/v2\/library/.test(url.pathname)) {
url.pathname = url.pathname.replace(/\/v2\//, '/v2/library/');
console.log(`modified_url: ${url.pathname}`)
}

url.hostname = hub_host;

let parameter = {
headers: {
'Host': hub_host,
'User-Agent': getReqHeader("User-Agent"),
'Accept': getReqHeader("Accept"),
'Accept-Language': getReqHeader("Accept-Language"),
'Accept-Encoding': getReqHeader("Accept-Encoding"),
'Connection': 'keep-alive',
'Cache-Control': 'max-age=0'
},
cacheTtl: 3600
};

if (e.request.headers.has("Authorization")) {
parameter.headers.Authorization = getReqHeader("Authorization");
}

let original_response = await fetch(new Request(url, e.request), parameter)
let original_response_clone = original_response.clone();
let original_text = original_response_clone.body;
let response_headers = original_response.headers;
let new_response_headers = new Headers(response_headers);
let status = original_response.status;

if (new_response_headers.get("Www-Authenticate")) {
let auth = new_response_headers.get("Www-Authenticate");
let re = new RegExp(auth_url, 'g');
new_response_headers.set("Www-Authenticate", response_headers.get("Www-Authenticate").replace(re, workers_url));
}

if (new_response_headers.get("Location")) {
return httpHandler(e.request, new_response_headers.get("Location"))
}

let response = new Response(original_text, {
status,
headers: new_response_headers
})
return response;

}


/**
* @param {Request} req
* @param {string} pathname
*/
function httpHandler(req, pathname) {
const reqHdrRaw = req.headers

// preflight
if (req.method === 'OPTIONS' &&
reqHdrRaw.has('access-control-request-headers')
) {
return new Response(null, PREFLIGHT_INIT)
}

let rawLen = ''

const reqHdrNew = new Headers(reqHdrRaw)

const refer = reqHdrNew.get('referer')

let urlStr = pathname

const urlObj = newUrl(urlStr)

/** @type {RequestInit} */
const reqInit = {
method: req.method,
headers: reqHdrNew,
redirect: 'follow',
body: req.body
}
return proxy(urlObj, reqInit, rawLen)
}


/**
*
* @param {URL} urlObj
* @param {RequestInit} reqInit
*/
async function proxy(urlObj, reqInit, rawLen) {
const res = await fetch(urlObj.href, reqInit)
const resHdrOld = res.headers
const resHdrNew = new Headers(resHdrOld)

// verify
if (rawLen) {
const newLen = resHdrOld.get('content-length') || ''
const badLen = (rawLen !== newLen)

if (badLen) {
return makeRes(res.body, 400, {
'--error': `bad len: ${newLen}, except: ${rawLen}`,
'access-control-expose-headers': '--error',
})
}
}
const status = res.status
resHdrNew.set('access-control-expose-headers', '*')
resHdrNew.set('access-control-allow-origin', '*')
resHdrNew.set('Cache-Control', 'max-age=1500')

resHdrNew.delete('content-security-policy')
resHdrNew.delete('content-security-policy-report-only')
resHdrNew.delete('clear-site-data')

return new Response(res.body, {
status,
headers: resHdrNew
})
}
```
改动处：

- 57 行，添加修改 head 前的 get 请求
- 72 行，添加修改 head 请求

另外好像版本问题有额外的报错，改动有

- 12 行
- 150 行


👇
```
# docker pull xxx.com/node
Using default tag: latest
latest: Pulling from node
c6cf28de8a06: Downloading [> ] 506.8kB/49.58MB
891494355808: Downloading [========> ] 4.184MB/24.05MB
```

@jeblove 当然，这是我从 jellyfin 、emby 使用者的角度看待，局限性不小，作为个小参考吧

入正还是比较建议 plex 的。
emby 兼容更新不如 jellyfin ，例如，之前 4.7 一直不支持 qsv （测试过 vaapi 对 12 代没完全适配）； 4.8 有个 qsv ，但是对中文特效字幕有异常（偏移）。
jellyfin 就没这些事，就是美化、不支持二级目录等这些小问题。
emby 的组车也不好，有设备数限制，如果设备数少也行，我是开放给朋友所以设备数会多些。
加上 emby 有开心版体验。
总结，感觉 jellyfin 与 emby 差距不大，入正建议 plex