我是 JavaScript 的新手，我正在嘗試在 Cloudflare Worker 上使用 JS 為 IFTTT 創(chuàng)建一個 Github API 網(wǎng)關(guān)（因為它無法修改標(biāo)頭）。這是代碼：async function handleRequest(request) {    var url = new URL(request.url)    var apiUrl = 'https://api.github.com' + url.pathname    var basicHeaders = {        'User-Agent': 'cloudflare',        'Accept': 'application/vnd.github.v3+json'    }    const { headers } = request    const contentType = headers.get('content-type')    const contentTypeUsed = !(!contentType)    if (request.method == 'POST' && contentTypeUsed) {        if (contentType.includes('application/json')) {            var body = await request.json()            if ('additionHeaders' in body) {                var additionHeaders = body.additionHeaders                delete body.additionHeaders            }            var apiRequest = {                'headers': JSON.stringify(Object.assign(basicHeaders,additionHeaders)),                'body': JSON.stringify(body),            }        } else {            return new Response('Error: Content-Type must be json', {status: 403})        }        const newRequest = new Request(apiUrl, new Request(request, apiRequest))        try {            var response = await fetch(newRequest)            return response        } catch (e) {            return new Response(JSON.stringify({error: e.message}), {status: 500})        }    } else {        var apiRequest = {            'headers': JSON.stringify(basicHeaders)        }        const newRequest = new Request(apiUrl, new Request(request, apiRequest))        var response = await fetch(newRequest)        return response    }}addEventListener('fetch', async (event) => {    event.respondWith(handleRequest(event.request))})