feat: handle punycode URLs (#13)

index.js

@@ -1,18 +1,20 @@
 'use strict'
 
+const punycodeRegex = require('punycode-regex')()
 const urlRegex = require('url-regex-safe')
 
 const REGEX_HTTP_PROTOCOL = /^https?:\/\//i
 
 module.exports = url => {
   try {
     const { href, hostname } = new URL(url)
+    if (!REGEX_HTTP_PROTOCOL.test(href)) return false
     const isIPv6 = hostname.startsWith('[') && hostname.endsWith(']')
+    const isPunycode = punycodeRegex.test(hostname)
+    const exact = !isIPv6 && !isPunycode
+    const tlds = isPunycode ? [] : undefined
     return (
-      REGEX_HTTP_PROTOCOL.test(href) &&
-      urlRegex({ apostrophes: true, exact: !isIPv6, parens: true }).test(
-        href
-      ) &&
+      urlRegex({ apostrophes: true, exact, parens: true, tlds }).test(href) &&
       href
     )
   } catch (_) {

package.json

@@ -34,6 +34,7 @@
     "whatwg"
   ],
   "dependencies": {
+    "punycode-regex": "~1.0.1",
     "re2": "~1.20.1",
     "url-regex-safe": "~4.0.0"
   },

test/index.js

@@ -17,7 +17,10 @@ const test = require('ava')
       'https://kikobeats.com',
       'https://www.kikobeats.com',
       'https://en.wikipedia.org/wiki/Saw_(disambiguation)',
-      'http://www.kikobeats.com'
+      'http://www.kikobeats.com',
+      'https://example.xn--p1ai',
+      'https://xn--80a0aaa.com',
+      'https://xn--80a0aaa.xn--p1ai'
     ].forEach(input => {
       const url = httpUrl(input)
       t.is(typeof url, 'string', `'${input}' is not true`)
@@ -42,6 +45,7 @@ const test = require('ava')
     ;(isLightweight
       ? urls
       : urls.concat([
+        'http://Http://xn--80a0aaa.xn--p1ai',
         'http://Http://kikobeats.com',
         'https://admin:admin@test-http-login.vercel.app',
         'http:!!!\0',