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DNS Extractor
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DNS Extractor

DNS Extractor

juansgaitan/dns-extractor
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Gets the IP addresses & *Reverse DNS from an input url. *Reverse DNS is IP address to domain name mapping - the opposite of forward (normal) DNS which maps domain names to IP addresses.

Dockerfile

1# This is a template for a Dockerfile used to run acts in Actor system.
2# The base image name below is set during the act build, based on user settings.
3# IMPORTANT: The base image must set a correct working directory, such as /usr/src/app or /home/user
4FROM apify/actor-node-puppeteer
5
6# Second, copy just package.json and package-lock.json since it should be
7# the only file that affects "npm install" in the next step, to speed up the build
8COPY package*.json ./
9
10# Install NPM packages, skip optional and development dependencies to
11# keep the image small. Avoid logging too much and print the dependency
12# tree for debugging
13RUN npm --quiet set progress=false \
14 && npm install --only=prod --no-optional \
15 && echo "Installed NPM packages:" \
16 && (npm list --all || true) \
17 && echo "Node.js version:" \
18 && node --version \
19 && echo "NPM version:" \
20 && npm --version
21
22# Copy source code to container
23# Do this in the last step, to have fast build if only the source code changed
24COPY --chown=node:node . ./
25
26# NOTE: The CMD is already defined by the base image.
27# Uncomment this for local node inspector debugging:
28# CMD [ "node", "--inspect=0.0.0.0:9229", "main.js" ]

package.json

1{
2    "name": "apify-project",
3    "version": "0.0.1",
4    "description": "",
5    "author": "It's not you it's me",
6    "license": "ISC",
7    "dependencies": {
8        "apify": "latest"
9    },
10    "scripts": {
11        "start": "node main.js"
12    }
13}

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});
Developer
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  • 4 monthly users
  • 0.0% runs succeeded
  • Modified over 1 year ago
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