威联通免费部署Docker镜像加速，解决docker无法拉取问题 [提供免费docker镜像加速地址]

首先提供一个现成的docker加速地址，不想弄的直接现成的拿走：docker.998919.xyz  （直接下拉到威联通配置的位置添加进去即可）

下面是自己搭建

一：准备一个域名，托管到cloudflare

二：cloudflare部署服务,跟着图来，域名准备好，不用添加dns

下面一步骤所需要的代码：

'use strict';
const hub_host = 'registry-1.docker.io';
const auth_url = 'https://auth.docker.io';
const workers_url = 'https://你的域名';


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',
    }),
};


function makeRes(body, status = 200, headers = {}) {
    headers['access-control-allow-origin'] = '*';
    return new Response(body, {
        status,
        headers
    });
}


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);
});


async function fetchHandler(e) {
    const getReqHeader = (key) => e.request.headers.get(key);


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


    if (!/%2F/.test(url.search) && /%3A/.test(url.toString())) {
        let modifiedUrl = url.toString().replace(/%3A(?=.*?&)/, '%3Alibrary%2F');
        url = new URL(modifiedUrl);
    }


    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);
    }


    if (/^\/v2\/[^/]+\/[^/]+\/[^/]+$/.test(url.pathname) && !/^\/v2\/library/.test(url.pathname)) {
        url.pathname = url.pathname.replace(/\/v2\//, '/v2/library/');
    }


    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 = await original_response_clone.text();
    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;
}


function httpHandler(req, pathname) {
    const reqHdrRaw = req.headers;


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


    let rawLen = '';


    const reqHdrNew = new Headers(reqHdrRaw);


    let urlStr = pathname;


    const urlObj = newUrl(urlStr);


    const reqInit = {
        method: req.method,
        headers: reqHdrNew,
        redirect: 'follow',
        body: req.body
    };
    return proxy(urlObj, reqInit, rawLen);
}


async function proxy(urlObj, reqInit, rawLen) {
    const res = await fetch(urlObj.href, reqInit);
    const resHdrOld = res.headers;
    const resHdrNew = new Headers(resHdrOld);


    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
    });
}

以上，cf内已经完成，切换回QNAP的docker