阻止其他网站盗链您的内容。

示例代码

const HOMEPAGE_URL = "https://ctyun.cn/"
const PROTECTED_TYPE = "image/"

async function handleRequest(request) {
  // Fetch the original request
  const response = await fetch(request)

  // If it's an image, engage hotlink protection based on the
  // Referer header.
  const referer = request.headers.get("Referer")
  const contentType = response.headers.get("Content-Type") || ""

  if (referer && contentType.startsWith(PROTECTED_TYPE)) {
    // If the hostnames don't match, it's a hotlink
    if (new URL(referer).hostname !== new URL(request.url).hostname) {
      // Redirect the user to your website
      return Response.redirect(HOMEPAGE_URL, 302)
    }
  }

  // Everything is fine, return the response normally.
  return response
}

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

示例预览

当一个请求到达时，首先检查其Content-Type是否是图像类型。
如果是图像类型，再检查 Referer头部是否指向当前域名。
如果 Referer头部指向的域名与当前域名不一致，则重定向到主页。

相关参考

• 运行时API：addEventListener
• 运行时API：FetchEvent
• 运行时API：Web Standards
• 运行时API：Fetch
• 运行时API：Response