Best way to resolve DNS on Cloudflare workers?

fetchdns · May 9, 2020, 3:18pm

Hello,
Is there are a simple way to make a DNS lookup with Cloudflare workers ?
Like in node.js with the DNS Module.

adaptive · May 9, 2020, 3:45pm

Have a look at this DoH example and you could build something around it:

adaptive/workers_examples/blob/master/doh_google_via_cloudflare/index.js

/**
 * Generate DNS over HTTPS from Google.
 * @param {Event} event - worker event
 */
const handleRequest = async event => {
  const url = new URL(event.request.url);
  const name = url.searchParams.get("name");
  const type = url.searchParams.get("type");

  if (type == null || type == "") {
    return new Response("type is missing", {
      status: 406,
      statusText: "Not Acceptable"
    });
  } else if (name == null || name == "") {
    return new Response("name is missing", {
      status: 406,
      statusText: "Not Acceptable"
    });
  }

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Best way to resolve DNS on Cloudflare workers?

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