零成本搭建跨域代理服务 - Cloudflare Workers实战指南

addEventListener('fetch', event => {
  event.respondWith(handleRequest(event.request))
})

async function handleRequest(request) {
  const url = new URL(request.url)
  const targetUrl = url.searchParams.get("target")

  if (!targetUrl) {
    return new Response("🚫 请提供目标URL参数: ?target=xxx", { status: 400 })
  }

  try {
    const response = await fetch(targetUrl, {
      method: request.method,
      headers: request.headers,
      body: request.method !== "GET" && request.method !== "HEAD" ? request.body : undefined,
      redirect: "follow"
    })

    const modifiedHeaders = new Headers(response.headers)
    modifiedHeaders.set("Access-Control-Allow-Origin", "*")
    modifiedHeaders.set("Access-Control-Allow-Methods", "GET, POST, PUT, DELETE, OPTIONS")
    modifiedHeaders.set("Access-Control-Allow-Headers", "*")

    return new Response(response.body, {
      status: response.status,
      headers: modifiedHeaders
    })
  } catch (error) {
    return new Response("❌ 请求失败: " + error.message, { status: 500 })
  }
}

https://你的worker名称.workers.dev/?target=https://httpbin.org/json

https://proxy.你的域名.com/?target=https://api.github.com/users/octocat

// 基础跨域请求
async function fetchData() {
  try {
    const response = await fetch('https://proxy.你的域名.com/?target=https://api.example.com/data')
    const data = await response.json()
    console.log('获取数据:', data)
  } catch (error) {
    console.error('请求失败:', error)
  }
}