cloudflare 有一个非常好用的功能—Workers,可以在无服务器的状态下运行一些程序,包括常见的反向代理等。
所以我利用这一功能实现对 gravatar 反代,达到国内访问加速的目的。
话不多说,开始流程操作,分享我的部署过程。
1.登陆后,在主页点击左侧的 Workers
,然后点击创建服务
。
2.服务名称随意填写,然后点击右下角创建。
3.点击右上角快速编辑
4.在左侧编辑器中输入下列的代码
点击展开代码
// 替换成你想镜像的站点 const upstream = 'gravatar.com'
// 如果那个站点有专门的移动适配站点,否则保持和上面一致
const upstream_mobile = 'gravatar.com'// 你希望禁止哪些国家访问
const blocked_region = []// 禁止自访问
const blocked_ip_address = []// 替换成你想镜像的站点
const replace_dict = {
'upstream': 'custom_domain',
'//gravatar.com': ''
}//以下内容都不用动
addEventListener('fetch', event => {
event.respondWith(fetchAndApply(event.request));
})async function fetchAndApply(request) {
const region = request.headers.get('cf-ipcountry').toUpperCase(); const ip_address = request.headers.get('cf-connecting-ip'); const user_agent = request.headers.get('user-agent'); let response = null; let url = new URL(request.url); let url_host = url.host; if (url.protocol == 'http:') { url.protocol = 'https:' response = Response.redirect(url.href); return response; } if (await device_status(user_agent)) { upstream_domain = upstream } else { upstream_domain = upstream_mobile } url.host = upstream_domain; if (blocked_region.includes(region)) { response = new Response('Access denied: WorkersProxy is not available in your region yet.', { status: 403 }); } else if(blocked_ip_address.includes(ip_address)){ response = new Response('Access denied: Your IP address is blocked by WorkersProxy.', { status: 403 }); } else{ let method = request.method; let request_headers = request.headers; let new_request_headers = new Headers(request_headers); new_request_headers.set('Host', upstream_domain); new_request_headers.set('Referer', url.href); let original_response = await fetch(url.href, { method: method, headers: new_request_headers }) let original_response_clone = original_response.clone(); let original_text = null; let response_headers = original_response.headers; let new_response_headers = new Headers(response_headers); let status = original_response.status; new_response_headers.set('access-control-allow-origin', '*'); new_response_headers.set('access-control-allow-credentials', true); new_response_headers.delete('content-security-policy'); new_response_headers.delete('content-security-policy-report-only'); new_response_headers.delete('clear-site-data'); const content_type = new_response_headers.get('content-type'); if (content_type.includes('text/html') && content_type.includes('UTF-8')) { original_text = await replace_response_text(original_response_clone, upstream_domain, url_host); } else { original_text = original_response_clone.body } response = new Response(original_text, { status, headers: new_response_headers }) } return response;
}
async function replace_response_text(response, upstream_domain, host_name) {
let text = await response.text()var i, j; for (i in replace_dict) { j = replace_dict[i] if (i == '$upstream') { i = upstream_domain } else if (i == '$custom_domain') { i = host_name } if (j == '$upstream') { j = upstream_domain } else if (j == '$custom_domain') { j = host_name } let re = new RegExp(i, 'g') text = text.replace(re, j); } return text;
}
async function device_status (user_agent_info) {
var agents = ["Android", "iPhone", "SymbianOS", "Windows Phone", "iPad", "iPod"];
var flag = true;
for (var v = 0; v < agents.length; v++) { if (user_agent_info.indexOf(agents[v]) > 0) {
flag = false;
break;
}
}
return flag;
}
然后点击保存并部署
,就可以成功反代 gravatar 镜像了。
然后照葫芦画瓢,可以通过这种方式反代任何网站,我就使用 https://zsh.im 反代了我的国内博客 https://zburu.com。
访问起来大致无压力,延迟100+ms左右。
5.自定义域名
在触发器中可以找到自定义域名选项,输入已经绑定 cloudflare 的域名,再次赞美 cloudflare,如果事前绑定好了域名,在这里可以直接输入二级域名,cloudflare 会自动解析,全部都是自动化的。
在主页左侧的 网站
绑定域名。
# 分享我的免费镜像。
https://gravatar.zsh.im/avatar