fix: request.headers for http2 cannot be deepmerged (#275)

node http2 server initializes headers with Object.create(null) and
they not have the propertyIsEnumerable method. This method is needed by
deepmerge.

Also added unit test for http2 request.

index.js

@@ -223,7 +223,7 @@ function fastifyMultipart (fastify, options, done) {
 
     const req = this.raw
 
-    const busboyOptions = deepmerge.all([{ headers: req.headers }, options || {}, opts || {}])
+    const busboyOptions = deepmerge.all([{ headers: Object.assign({}, req.headers) }, options || {}, opts || {}])
     const stream = busboy(busboyOptions)
     let completed = false
     let files = 0
@@ -316,7 +316,7 @@ function fastifyMultipart (fastify, options, done) {
     let lastError = null
     const request = this.raw
     const busboyOptions = deepmerge.all([
-      { headers: request.headers },
+      { headers: Object.assign({}, request.headers) },
       options,
       opts
     ])

package.json

@@ -27,6 +27,7 @@
     "eslint-plugin-typescript": "^0.14.0",
     "fastify": "^3.2.1",
     "form-data": "^4.0.0",
+    "h2url": "^0.2.0",
     "pre-commit": "^1.2.2",
     "pump": "^3.0.0",
     "readable-stream": "^3.6.0",

test/multipart-http2.test.js

@@ -0,0 +1,43 @@
+'use strict'
+
+const test = require('tap').test
+const FormData = require('form-data')
+const Fastify = require('fastify')
+const multipart = require('..')
+const h2url = require('h2url')
+const path = require('path')
+const fs = require('fs')
+const sendToWormhole = require('stream-wormhole')
+
+const filePath = path.join(__dirname, '../README.md')
+
+test('should respond when all files are processed', function (t) {
+  const fastify = Fastify({ http2: true })
+  t.teardown(fastify.close.bind(fastify))
+
+  fastify.register(multipart)
+
+  fastify.post('/', async function (req, reply) {
+    const parts = req.files()
+    for await (const part of parts) {
+      t.ok(part.file)
+      await sendToWormhole(part.file)
+    }
+    reply.code(200).send()
+  })
+
+  fastify.listen(0, async function () {
+    const url = `http://localhost:${fastify.server.address().port}`
+    const form = new FormData()
+
+    form.append('upload', fs.createReadStream(filePath))
+    form.append('upload2', fs.createReadStream(filePath))
+    form.append('hello', 'world')
+    form.append('willbe', 'dropped')
+
+    const res = await h2url.concat({ url, method: 'POST', headers: form.getHeaders(), body: form })
+
+    t.equal(res.headers[':status'], 200)
+    t.end()
+  })
+})