代码在github.worker.js
// 站点配置对象
// 理论上更换上游只需修改domain即可。
const siteConfig = {
domain: 'github.com',
upstream_path: '/',
blocked_region: ['KP', 'SY', 'PK', 'CU'],
blocked_ip_address: ['0.0.0.0', '127.0.0.1'],
https: true,
replace_dict: {'$upstream': '$custom_domain'}
}
siteConfig.upstream = siteConfig.domain
siteConfig.upstream_mobile = siteConfig.domain
siteConfig.replace_dict[`//${siteConfig.domain}`] = ''
// 以下保持默认，不要动
addEventListener('fetch', event => {
event.respondWith(fetchAndApply(event.request))
})
async function fetchAndApply(request) {
// 获取请求头中的地区和 IP 信息
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')
const url = new URL(request.url)
// 设置协议
if (siteConfig.https) {
url.protocol = 'https:'
} else {
url.protocol = 'http:'
}
// 根据设备类型选择上游域名
const upstream_domain = await isMobileDevice(user_agent) ? siteConfig.upstream_mobile : siteConfig.upstream
url.host = upstream_domain
// 设置路径
if (url.pathname === '/') {
url.pathname = siteConfig.upstream_path
} else {
url.pathname = siteConfig.upstream_path + url.pathname
}
// 检查地区和 IP 是否被屏蔽
if (siteConfig.blocked_region.includes(region)) {
return new Response('Access denied: WorkersProxy is not available in your region yet.', { status: 403 })
}
if (siteConfig.blocked_ip_address.includes(ip_address)) {
return new Response('Access denied: Your IP address is blocked by WorkersProxy.', { status: 403 })
}
// 修改请求头
const new_request_headers = new Headers(request.headers)
new_request_headers.set('Host', url.hostname)
new_request_headers.set('Referer', url.hostname)
// 发送请求到上游服务器
const original_response = await fetch(url.href, {
method: request.method,
headers: new_request_headers
})
// 修改响应头
const new_response_headers = new Headers(original_response.headers)
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')
// 文本替换
let original_text
if (new_response_headers.get('content-type')?.includes('text/html') && new_response_headers.get('content-type')?.includes('UTF-8')) {
original_text = await replaceResponseText(original_response, upstream_domain, url.hostname)
} else {
original_text = await original_response.text()
}
// 返回修改后的响应
return new Response(original_text, {
status: original_response.status,
headers: new_response_headers
})
}
async function replaceResponseText(response, upstream_domain, host_name) {
let text = await response.text()
// 遍历替换字典进行文本替换
for (const [key, value] of Object.entries(siteConfig.replace_dict)) {
const pattern = new RegExp(key === '$upstream' ? upstream_domain : key, 'g')
text = text.replace(pattern, value === '$upstream' ? upstream_domain : host_name)
}
return text
}
// 检测用户代理是否为移动设备
async function isMobileDevice(user_agent) {
const agents = ["Android", "iPhone", "SymbianOS", "Windows Phone", "iPad", "iPod"]
return agents.every(agent => !user_agent.includes(agent))
}
worker自带会怎么样