dnsApi

const express = require ('express'); const app = express(); const dns = require('dns'); const Joi = require ('joi'); const apiVersion = "v1"; app.use(express.json()); app.get('/', (req, res) => { res.send('Go to /api'); }); app.get('/api/', (req, res) => { const Response = { status: 'ok', "service_version": apiVersion }; res.send(Response); }); app.get('/api/A/:hostname', (req, res) => { const { error } = validateHostname(req.params.hostname); if (error) return res.status(400).send( { error: error.name, message: error.details[0].message } ); dns.resolve4(req.params.hostname, (err, addresses) => { if (err) return res.status(404).send( { error: 'NotFound', message: 'Hostname not found' } ); //console.log(`addresses: ${JSON.stringify(addresses)}`); //console.log(dns.getServers()); const dnsResponse = { ipv4: addresses, hostname: req.params.hostname, "service_version": apiVersion }; res.send(dnsResponse); }); }); app.get('/api/AAAA/:hostname', (req, res) => { const { error } = validateHostname(req.params.hostname); if (error) return res.status(400).send( { error: error.name, message: error.details[0].message } ); dns.resolve6(req.params.hostname, (err, addresses) => { if (err) return res.status(404).send( { error: 'NotFound', message: 'Hostname not found' } ); const dnsResponse = { ipv6: addresses, hostname: req.params.hostname, "service_version": apiVersion }; res.send(dnsResponse); }); }); app.get('/api/CNAME/:hostname', (req, res) => { const { error } = validateHostname(req.params.hostname); if (error) return res.status(400).send( { error: error.name, message: error.details[0].message } ); dns.resolveCname(req.params.hostname, (err, addresses) => { if (err) return res.status(404).send( { error: 'NotFound', message: 'Hostname not found' } ); const dnsResponse = { alias: addresses, hostname: req.params.hostname, "service_version": apiVersion }; res.send(dnsResponse); }); }); app.get('/api/MX/:hostname', (req, res) => { const { error } = validateHostname(req.params.hostname); if (error) return res.status(400).send( { error: error.name, message: error.details[0].message } ); dns.resolveMx(req.params.hostname, (err, addresses) => { if (err) return res.status(404).send( { error: 'NotFound', message: 'Hostname not found' } ); const dnsResponse = { mx: addresses, hostname: req.params.hostname, "service_version": apiVersion }; res.send(dnsResponse); }); }); app.get('/api/NAPTR/:hostname', (req, res) => { const { error } = validateHostname(req.params.hostname); if (error) return res.status(400).send( { error: error.name, message: error.details[0].message } ); dns.resolveNaptr(req.params.hostname, (err, addresses) => { if (err) return res.status(404).send( { error: 'NotFound', message: 'Hostname not found' } ); const dnsResponse = { naptr: addresses, hostname: req.params.hostname, "service_version": apiVersion }; res.send(dnsResponse); }); }); app.get('/api/NS/:hostname', (req, res) => { const { error } = validateHostname(req.params.hostname); if (error) return res.status(400).send( { error: error.name, message: error.details[0].message } ); dns.resolveNs(req.params.hostname, (err, addresses) => { if (err) return res.status(404).send( { error: 'NotFound', message: 'Hostname not found' } ); const dnsResponse = { ns: addresses, hostname: req.params.hostname, "service_version": apiVersion }; res.send(dnsResponse); }); }); app.get('/api/PTR/:hostname', (req, res) => { const { error } = validateHostname(req.params.hostname); if (error) return res.status(400).send( { error: error.name, message: error.details[0].message } ); dns.resolvePtr(req.params.hostname, (err, addresses) => { if (err) return res.status(404).send( { error: 'NotFound', message: 'Hostname not found' } ); const dnsResponse = { ptr: addresses, hostname: req.params.hostname, "service_version": apiVersion }; res.send(dnsResponse); }); }); app.get('/api/SOA/:hostname', (req, res) => { const { error } = validateHostname(req.params.hostname); if (error) return res.status(400).send( { error: error.name, message: error.details[0].message } ); dns.resolveSoa(req.params.hostname, (err, addresses) => { if (err) return res.status(404).send( { error: 'NotFound', message: 'Hostname not found' } ); const dnsResponse = { soa: addresses, hostname: req.params.hostname, "service_version": apiVersion }; res.send(dnsResponse); }); }); app.get('/api/SRV/:hostname', (req, res) => { const { error } = validateHostname(req.params.hostname); if (error) return res.status(400).send( { error: error.name, message: error.details[0].message } ); dns.resolveSrv(req.params.hostname, (err, addresses) => { if (err) return res.status(404).send( { error: 'NotFound', message: 'Hostname not found' } ); const dnsResponse = { srv: addresses, hostname: req.params.hostname, "service_version": apiVersion }; res.send(dnsResponse); }); }); app.get('/api/TXT/:hostname', (req, res) => { const { error } = validateHostname(req.params.hostname); if (error) return res.status(400).send( { error: error.name, message: error.details[0].message } ); dns.resolveTxt(req.params.hostname, (err, records) => { if (err) return res.status(404).send( { error: 'NotFound', message: 'Hostname not found' } ); const dnsResponse = { txt: records, hostname: req.params.hostname, "service_version": apiVersion }; res.send(dnsResponse); }); }); app.get('/api/reverse/:hostname', (req, res) => { const { error } = validateIp(req.params.hostname); if (error) return res.status(400).send( { error: error.name, message: error.details[0].message } ); dns.reverse(req.params.hostname, (err, addresses) => { if (err) return res.status(404).send( { error: 'NotFound', message: 'Hostname not found' } ); const dnsResponse = { hostname: addresses, ip: req.params.hostname, "service_version": apiVersion }; res.send(dnsResponse); }); }); function validateHostname(hostname) { const schema = Joi.string().required().regex(/^[a-zA-Z0-9\-_\.]{3,253}$/, { name: 'permitted name' }); return schema.validate(hostname); } function validateIp(hostname) { const schema = Joi.string().ip().required(); return schema.validate(hostname); } const port = process.env.PORT || 3000; app.listen(port, () => console.log (`Listening on port ${port}...`));