Initial RDAP/WHOIS lookup logic

.gitignore

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+node_modules
+.idea
+.DS_Store

package.json

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+{
+  "name": "web-whois",
+  "version": "0.0.1",
+  "description": "Perform RDAP/WHOIS lookups over HTTP",
+  "main": "src/index.js",
+  "keywords": [],
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/MattIPv4/web-whois.git"
+  },
+  "author": "Matt (IPv4) Cowley",
+  "license": "Apache-2.0",
+  "bugs": {
+    "url": "https://github.com/MattIPv4/web-whois/issues"
+  },
+  "homepage": "https://github.com/MattIPv4/web-whois#readme",
+  "dependencies": {
+    "node-fetch": "^2.6.1"
+  }
+}

src/index.js

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+const rdapLookup = require('./rdap');
+const whoisLookup = require('./whois');
+
+module.exports = async (query, combine = false) => {
+    // Do the RDAP lookup
+    const rdap = await rdapLookup(query);
+
+    // If we have RDAP data and don't need to combine, return it
+    if (rdap && !combine) return rdap;
+
+    // Doo the WHOIS lokkup
+    const whois = await whoisLookup(query);
+
+    // Combine if we can and need to (preferring RDAP)
+    if (combine && (rdap || whois)) return { ...(whois || {}), ...(rdap || {}) };
+
+    // Return just the WHOIS data
+    return whois;
+};

src/rdap.js

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+const fetch = require('node-fetch');
+const { consistentResultObj } = require('./util');
+
+// Unique values in an array, comma-separated
+const uniqueCommaSep = arr => [...new Set(arr)].join(', ');
+
+// Find RDAP data entities that match a name
+const findEntities = (name, data) => data.entities && data.entities.filter(entity =>
+    entity.roles.map(role => role.trim().toLowerCase()).includes(name));
+
+// Find a specific vcard for an RDAP entity
+const entityVcard = (entity, vcard) => {
+    if (entity && entity.vcardArray && Array.isArray(entity.vcardArray) && entity.vcardArray.length > 1) {
+        const entityFn = entity.vcardArray[1].find(card => card[0] === vcard);
+        if (entityFn && Array.isArray(entityFn) && entityFn.length > 3) return entityFn[3];
+    }
+};
+
+// Find a vcard name/handle for an RDAP entity
+const findEntityName = (name, data) => {
+    const entities = findEntities(name, data);
+    if (!entities) return;
+
+    return uniqueCommaSep(entities.map(entity => entityVcard(entity, 'fn') || (entity && entity.handle)) || []);
+};
+
+// Find a vcard email address for an RDAP entity
+const findEntityEmail = (name, data) => {
+    const entities = findEntities(name, data);
+    if (!entities) return;
+
+    return uniqueCommaSep(entities.map(entity => entityVcard(entity, 'email')) || []);
+};
+
+// Get a JS Date for a specific RDAP data event
+const findEventDate = (name, data) => {
+    if (!data.events) return;
+    const event = data.events.find(event => event.eventAction.trim().toLowerCase() === name);
+    if (!event || !event.eventDate) return;
+    return new Date(event.eventDate);
+};
+
+// Find the ASN information from the RDAP data
+const findAsn = data => uniqueCommaSep((data.arin_originas0_originautnums || []).map(asn => asn.toString()));
+
+// Format RDAP CIDR data
+const formatCidr = cidr => cidr && (cidr.v4prefix || cidr.v6prefix) && cidr.length
+    ? (cidr.v4prefix || cidr.v6prefix) + '/' + cidr.length.toString()
+    : undefined;
+
+// Find the CIDR blocks from the RDAP data
+const findCidr = data => uniqueCommaSep((data.cidr0_cidrs || []).map(formatCidr).filter(cidr => cidr !== undefined));
+
+// Find the abuse email in the RDAP data
+const findAbuseEmail = data => {
+    const directAbuse = findEntityEmail('abuse', data);
+    if (directAbuse) return directAbuse;
+
+    const registrarEntities = findEntities('registrar', data);
+    if (!registrarEntities) return;
+
+    return findEntityEmail('abuse', { entities: registrarEntities.map(entity => entity.entities).flat(1) });
+};
+
+module.exports = async query => {
+    const resp = await fetch(`https://rdap.cloud/api/v1/${query}`);
+    const rawData = await resp.json().catch(() => false);
+    const data = rawData && rawData.results && rawData.results[query];
+
+    // Ensure the data is there
+    if (!data || !data.success || !data.data)
+        return false;
+
+    // Find the useful information for us
+    const result = consistentResultObj({
+        name: data.data.name,
+        registrant: findEntityName('registrant', data.data),
+        asn: findAsn(data.data),
+        registrar: findEntityName('registrar', data.data),
+        registration: findEventDate('registration', data.data),
+        expiration: findEventDate('expiration', data.data),
+        cidr: findCidr(data.data),
+        abuse: findAbuseEmail(data.data),
+    });
+
+    // Return false if we found nothing, otherwise return the data
+    return Object.values(result).every(x => x === undefined) ? false : result;
+};

src/util.js

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+module.exports.consistentResultObj = data => ({
+    name:           data.name           || undefined,
+    registrant:     data.registrant     || undefined,
+    asn:            data.asn            || undefined,
+    registrar:      data.registrar      || undefined,
+    registration:   data.registration   || undefined,
+    expiration:     data.expiration     || undefined,
+    cidr:           data.cidr           || undefined,
+    abuse:          data.abuse          || undefined,
+});

src/whois.js

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+const fetch = require('node-fetch');
+const { consistentResultObj } = require('./util');
+
+const parseWhois = text => {
+    // RegExp parts
+    const reLinebreak = '\\r\\n';
+    const reWhitespace = `[^\\S${reLinebreak}]`;
+    const reKey = '([a-zA-Z\\s]+):';
+    const reText = `([^${reLinebreak}]+)`;
+    const reLineStart = `^${reWhitespace}*${reKey}`;
+    const reLineEnd = `${reWhitespace}+${reText}$`;
+
+    // The RegExps to be used
+    const reSingleLine = `${reLineStart}${reLineEnd}`;
+    const regExpSingleLineGm = new RegExp(reSingleLine, 'gm');
+    const regExpSingleLine = new RegExp(reSingleLine);
+    const reSplitLine = `${reLineStart}[${reLinebreak}]+${reLineEnd}`;
+    const regExpSplitLineGm = new RegExp(reSplitLine, 'gm');
+    const regExpSplitLine = new RegExp(reSplitLine);
+
+    // Find the matches in the string
+    const singleLineMatches = text.match(regExpSingleLineGm) || [];
+    const splitLineMatches = text.match(regExpSplitLineGm) || [];
+    const matches = [];
+
+    // All single line matches are valid
+    for (const rawMatch of singleLineMatches) {
+        const match = rawMatch.trim().match(regExpSingleLine);
+        matches.push({
+            key: match[1],
+            value: match[2],
+        });
+    }
+
+    // Split line matches that don't include a single line match are valid
+    for (const rawMatch of splitLineMatches) {
+        if (singleLineMatches.map(singleLineMatch => rawMatch.includes(singleLineMatch)).includes(true))
+            continue;
+
+        const match = rawMatch.trim().match(regExpSplitLine);
+        matches.push({
+            key: match[1],
+            value: match[2],
+        });
+    }
+
+    // Return the final parsed data
+    return matches;
+};
+
+// Find an attribute value from the WHOIS data
+const findAttribute = (name, data) => {
+    const entry = data.find(entry => entry.key.trim().toLowerCase() === name);
+    return entry && entry.value && `${entry.value}`.trim();
+};
+
+// Find a JS Date for an attribute from the WHOIS data
+const findAttributeDate = (name, data) => {
+    const attribute = findAttribute(name, data);
+    if (!attribute) return;
+    return new Date(attribute);
+};
+
+module.exports = async query => {
+    const resp = await fetch(`https://whoisjs.com/api/v1/${query}`);
+    const rawData = await resp.json().catch(() => false);
+
+    // Ensure the data is there
+    if (!rawData || !rawData.success || !rawData.raw)
+        return false;
+
+    // Parse ourselves
+    const data = parseWhois(rawData.raw);
+    if (!data)
+        return false;
+
+    // Find the useful information for us
+    const result = consistentResultObj({
+        registrant: findAttribute('registrant', data),
+        registrar: findAttribute('registrar', data) || findAttribute('organisation', data),
+        registration: findAttributeDate('creation date', data) || findAttributeDate('registered on', data),
+        expiration: findAttributeDate('registry expiry date', data) || findAttributeDate('expiry date', data),
+        abuse: findAttribute('registrar abuse contact email', data),
+    });
+
+    // Return false if we found nothing, otherwise return the data
+    return Object.values(result).every(x => x === undefined) ? false : result;
+};