Moves API handlers from server/lambda to /api

api/dns-server.js

@@ -0,0 +1,48 @@
+const dns = require('dns');
+const dnsPromises = dns.promises;
+// const https = require('https');
+const axios = require('axios');
+
+exports.handler = async (event) => {
+  const domain = event.queryStringParameters.url.replace(/^(?:https?:\/\/)?/i, "");
+  try {
+    const addresses = await dnsPromises.resolve4(domain);
+    const results = await Promise.all(addresses.map(async (address) => {
+      const hostname = await dnsPromises.reverse(address).catch(() => null);
+      let dohDirectSupports = false;
+      try {
+        await axios.get(`https://${address}/dns-query`);
+        dohDirectSupports = true;
+      } catch (error) {
+        dohDirectSupports = false;
+      }
+      return {
+        address,
+        hostname,
+        dohDirectSupports,
+      };
+    }));
+    // let dohMozillaSupport = false;
+    // try {
+    //   const mozillaList = await axios.get('https://firefox.settings.services.mozilla.com/v1/buckets/security-state/collections/onecrl/records');
+    //   dohMozillaSupport = results.some(({ hostname }) => mozillaList.data.data.some(({ id }) => id.includes(hostname)));
+    // } catch (error) {
+    //   console.error(error);
+    // }
+    return {
+      statusCode: 200,
+      body: JSON.stringify({
+        domain,
+        dns: results,
+        // dohMozillaSupport,
+      }),
+    };
+  } catch (error) {
+    return {
+      statusCode: 500,
+      body: JSON.stringify({
+        error: `An error occurred while resolving DNS. ${error.message}`,
+      }),
+    };
+  }
+};