POSTs whose bodys are instances of createReadStream hang with latest node

[stephen-willoughby]

Describe the bug

• Node.js version: 20.11.1
• OS & version: macos 14.4

Whilst trying to move to support node 20, I have come across the following behaviour. If I drop to node 20.9.0 it works correctly. If I replace got with axios it works correctly.

Of note is nock/nock#2595 but as switching to axios seems to work and everyone on the nock issue is using got, got seems the more likely candidate.

Actual behavior

this code completes with 13 and nothing outputted
...

Expected behavior

I should outputted the body { foo: 'bar' } and complete
...

Code to reproduce

Note you need to provide somefile.txt, its content is irrelevant.

import nock from 'nock'
import { createReadStream } from 'fs'
import got from 'got'

const myFile = 'somefile.txt'
const host = 'http://example.com'
const path = '/some/path'
const response = { foo: 'bar' }
const options = {
  method: 'post',
  url: host + path,
  body: createReadStream(myFile)
}

nock(host)
  .post(path)
  .reply(200, response)

try {
  const result = await got(options)
  console.log(result.body)
} catch (error) {
  console.error('error')
  console.error(error)
}
console.log('complete')

Checklist

• I have read the documentation.
• I have tried my code with the latest version of Node.js and Got.

[stephen-willoughby]

For old node

{"foo":"bar"}
complete

Process finished with exit code 0

for node 20.11.1

Process finished with exit code 13

[sindresorhus]

Does it work without Nock? If yes, then the issue is definitely Nock as it should work with anything that normally works without it.

You can replace Nock with https://httpbin.org for testing.

[stephen-willoughby]

Yes, it works without nock, replacing it with https://httpbin.org/post, but similarly nock works with axios in place of got.

[masontikhonov]

@sindresorhus I tend to agree that it might be an issue with Got, in particular with asPromise(request), which returns promise that never resolves in some rare conditions (changes to streams that were done in node v20.10.0 + some nock behavior).

[aduh95]

FYI patching Nock source the following way resolved the issue for me:

index d82c2446b540759cbc54ad7b26222a80109b8ec9..bf24add845d12e436c97b3ea5e2e38f87b77d489 100644
--- a/lib/intercepted_request_router.js
+++ b/lib/intercepted_request_router.js
@@ -68,7 +68,7 @@ class InterceptedRequestRouter {
     // For parity with Node, it's important the socket event is emitted before we begin playback.
     // This flag is set when playback is triggered if we haven't yet gotten the
     // socket event to indicate that playback should start as soon as it comes in.
-    this.readyToStartPlaybackOnSocketEvent = false
+    this.readyToStartPlaybackOnSocketEvent = true

     this.attachToReq()