DNS Extractor

# This is a template for a Dockerfile used to run acts in Actor system.
# The base image name below is set during the act build, based on user settings.
# IMPORTANT: The base image must set a correct working directory, such as /usr/src/app or /home/user
FROM apify/actor-node-puppeteer

# Second, copy just package.json and package-lock.json since it should be
# the only file that affects "npm install" in the next step, to speed up the build
COPY package*.json ./

# Install NPM packages, skip optional and development dependencies to
# keep the image small. Avoid logging too much and print the dependency
# tree for debugging
RUN npm --quiet set progress=false \
 && npm install --only=prod --no-optional \
 && echo "Installed NPM packages:" \
 && (npm list --all || true) \
 && echo "Node.js version:" \
 && node --version \
 && echo "NPM version:" \
 && npm --version

# Copy source code to container
# Do this in the last step, to have fast build if only the source code changed
COPY --chown=node:node . ./

# NOTE: The CMD is already defined by the base image.
# Uncomment this for local node inspector debugging:
# CMD [ "node", "--inspect=0.0.0.0:9229", "main.js" ]

{
    "name": "apify-project",
    "version": "0.0.1",
    "description": "",
    "author": "It's not you it's me",
    "license": "ISC",
    "dependencies": {
        "apify": "latest"
    },
    "scripts": {
        "start": "node main.js"
    }
}

1const Apify = require('apify');
2const { URL } = require('url');
3const { promisify } = require('util');
4const { lookup, resolveAny, reverse } = require('dns');
5
6const { log, dir } = console;
7const [dnsLookup, dnsResolve, dnsReverse] = [
8  lookup,
9  resolveAny,
10  reverse,
11].map(promisify);
12
13Apify.main(async () => {
14  const input = await Apify.getValue('INPUT');
15  log(input);
16
17  const { url } = input;
18  if (!url) throw Error('No input URL');
19  log('Input URL:', url);
20
21  const protocol = 'http://';
22  const parsedUrl = `${/http/.test(url) ? '' : protocol}${url}`;
23
24  const { host, origin } = new URL(parsedUrl);
25  log('URL host:', host);
26  log('URL origin:', origin);
27
28  const output = { origin, host };
29
30  let shouldTryReverse = true;
31  try {
32    Object.assign(output, {
33      hostIp: await dnsLookup(host),
34      hostResolve: await dnsResolve(host),
35    });
36  } catch (error) {
37    log(error.message);
38    Object.assign(output, { error: error.message });
39    shouldTryReverse = false;
40  }
41
42  if (shouldTryReverse) {
43    try {
44      Object.assign(output, {
45        hostReverse: await dnsReverse(output.hostIp.address),
46      });
47    } catch (error) {
48      log('Error DNS Reverse', error.message);
49    }
50  }
51
52  log('Output result:');
53  dir(output);
54  await Apify.setValue('OUTPUT', output);
55});