Support IPv6 ::1 in listeningOrigin (#4902)

* Support IPv6 ::1 in listeningOrigin

Signed-off-by: Matteo Collina <hello@matteocollina.com>

* Update fastify.js

Co-authored-by: KaKa <23028015+climba03003@users.noreply.github.com>

---------

Signed-off-by: Matteo Collina <hello@matteocollina.com>
Co-authored-by: KaKa <23028015+climba03003@users.noreply.github.com>

fastify.js

@@ -355,7 +355,8 @@ function fastify (options) {
         if (typeof address === 'string') {
           return address
         }
-        return `${this[kOptions].https ? 'https' : 'http'}://${address.address}:${address.port}`
+        const host = address.family === 'IPv6' ? `[${address.address}]` : address.address
+        return `${this[kOptions].https ? 'https' : 'http'}://${host}:${address.port}`
       }
     },
     pluginName: {

test/fastify-instance.test.js

@@ -152,19 +152,20 @@ test('fastify instance should contains listeningOrigin property (with port and h
   await fastify.close()
 })
 
-test('fastify instance should contains listeningOrigin property (no options)', async t => {
-  t.plan(1)
-  const fastify = Fastify()
-  await fastify.listen()
-  const address = fastify.server.address()
-  t.same(fastify.listeningOrigin, `http://${address.address}:${address.port}`)
-  await fastify.close()
-})
-
 test('fastify instance should contains listeningOrigin property (unix socket)', { skip: os.platform() === 'win32' }, async t => {
   const fastify = Fastify()
   const path = `fastify.${Date.now()}.sock`
   await fastify.listen({ path })
   t.same(fastify.listeningOrigin, path)
   await fastify.close()
 })
+
+test('fastify instance should contains listeningOrigin property (IPv6)', async t => {
+  t.plan(1)
+  const port = 3000
+  const host = '::1'
+  const fastify = Fastify()
+  await fastify.listen({ port, host })
+  t.same(fastify.listeningOrigin, `http://[::1]:${port}`)
+  await fastify.close()
+})