Cloudflare worker向Cloudflare DNS发出的请求未返回DNS结果
我有一个Cloudflare(CF)工作程序,我想让它使用CF DNS()发出一些DNS请求 因此,一个相当基础的工人:Cloudflare worker向Cloudflare DNS发出的请求未返回DNS结果,dns,cloudflare,cloudflare-workers,Dns,Cloudflare,Cloudflare Workers,我有一个Cloudflare(CF)工作程序,我想让它使用CF DNS()发出一些DNS请求 因此,一个相当基础的工人: /** * readRequestBody reads in the incoming request body * Use await readRequestBody(..) in an async function to get the string * @param {Request} request the incoming request to read fr
/**
* readRequestBody reads in the incoming request body
* Use await readRequestBody(..) in an async function to get the string
* @param {Request} request the incoming request to read from
*/
async function readRequestBody(request) {
const { headers } = request
const contentType = headers.get('content-type')
if (contentType.includes('application/json')) {
const body = await request.json()
return JSON.stringify(body)
}
return ''
}
/**
* Respond to the request
* @param {Request} request
*/
async function handleRequest(request) {
let reqBody = await readRequestBody(request)
var jsonTlds = JSON.parse(reqBody);
const fetchInit = {
method: 'GET',
}
let promises = []
for (const tld of jsonTlds.tlds) {
//Dummy request until I can work out why I am not getting the response of the DNS query
var requestStr = 'https://cloudflare-dns.com/dns-query?ct=application/dns-json&name=example.com&type=A'
let promise = fetch(requestStr, fetchInit)
promises.push(promise)
}
try {
let results = await Promise.all(promises)
return new Response(JSON.stringify(results), {status: 200})
} catch(err) {
return new Response(JSON.stringify(err), {status: 500})
}
}
addEventListener('fetch', event => {
event.respondWith(handleRequest(event.request))
})
我刚刚将DNS查询硬编码为:
我希望我得到的JSON结果是:
{
"Status": 0,
"TC": false,
"RD": true,
"RA": true,
"AD": true,
"CD": false,
"Question": [
{
"name": "example.com.",
"type": 1
}
],
"Answer": [
{
"name": "example.com.",
"type": 1,
"TTL": 9540,
"data": "93.184.216.34"
}
]
}
但是,在结果中,我得到的似乎是作为fetch()的一部分建立的websocket的结果(假设我循环一次)
所以我的问题是,我在这里做错了什么,以至于我没有从1.1.1.1 API获得DNS JSON响应?fetch()
返回一个承诺,其中包含响应状态、头和正文流。这个物体就是你在“结果”中看到的东西。要读取响应正文,必须进行进一步调用
尝试定义如下所示的函数:
async function fetchJsonBody(req, init) {
let response = await fetch(req, init);
if (!response.ok()) {
// Did not return status 200; throw an error.
throw new Error(response.status + " " + response.statusText);
}
// OK, now we can read the body and parse it as JSON.
return await response.json();
}
现在您可以更改:
let promise = fetch(requestStr, fetchInit)
致:
谢谢,但是我失去了在一个块中启动所有响应的能力,因为在fetchJsonBody()中有一个wait?@边缘否-注意,我没有在调用
fetchJsonBody()之前放置wait
。因此,函数本身内部的wait
s将异步执行。对fetchJsonBody()
的外部调用立即返回,并返回一个承诺。因此,这仍然会使所有请求并行。
let promise = fetch(requestStr, fetchInit)
let promise = fetchJsonBody(requestStr, fetchInit)