http2: fix req.hostname not set (#2113)

* http2: fix req.hostname not set

* Update lib/route.js

Co-Authored-By: Matteo Collina <matteo.collina@gmail.com>

Co-authored-by: Matteo Collina <matteo.collina@gmail.com>

lib/route.js

@@ -307,7 +307,7 @@ function buildRouting (options) {
 
     req.id = req.headers[requestIdHeader] || genReqId(req)
     req.originalUrl = req.url
-    var hostname = req.headers.host
+    var hostname = req.headers.host || req.headers[':authority']
     var ip = req.connection.remoteAddress
     var ips
 

test/http2/plain.js

@@ -20,6 +20,10 @@ fastify.get('/', function (req, reply) {
   reply.code(200).send(msg)
 })
 
+fastify.get('/hostname', function (req, reply) {
+  reply.code(200).send(req.hostname)
+})
+
 fastify.listen(0, err => {
   t.error(err)
   fastify.server.unref()
@@ -35,4 +39,15 @@ fastify.listen(0, err => {
 
     t.deepEqual(JSON.parse(res.body), msg)
   })
+
+  test('http hostname', async (t) => {
+    t.plan(1)
+
+    const hostname = `localhost:${fastify.server.address().port}`
+
+    const url = `http://${hostname}/hostname`
+    const res = await h2url.concat({ url })
+
+    t.strictEqual(res.body, hostname)
+  })
 })