根据标头中的已知预共享密钥允许或拒绝请求。

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/**
 * @param {string} PRESHARED_AUTH_HEADER_KEY Custom header to check for key
 * @param {string} PRESHARED_AUTH_HEADER_VALUE Hard coded key value
 */
const PRESHARED_AUTH_HEADER_KEY = "X-Custom-PSK"
const PRESHARED_AUTH_HEADER_VALUE = "mypresharedkey"

async function handleRequest(request) {
    const psk = request.headers.get(PRESHARED_AUTH_HEADER_KEY)

    if (psk === PRESHARED_AUTH_HEADER_VALUE) {
        // Correct preshared header key supplied. Fetch request from origin.
        return fetch(request)
    }

    // Incorrect key supplied. Reject the request.
    return new Response("Sorry, you have supplied an invalid key.", {
        status: 403,
    })
}

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

示例预览

在请求过程中不带密钥访问，请求被拒绝。

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