Node.js http/https response callback not called in ShadowRealm #25608
Description
What version of Bun is used?
1.3.4
What platform is your computer?
Darwin arm64 (macOS)
What steps can reproduce the bug?
import https from 'https'
// Test 1: Node.js http WITHOUT ShadowRealm - WORKS
console.log('Test 1: Node.js https.request WITHOUT ShadowRealm')
await new Promise((resolve) => {
const req = https.request('https://httpbin.org/get', { method: 'GET' }, (res) => {
console.log('✓ Response callback, status:', res.statusCode)
resolve()
})
req.on('error', (e) => console.error('✗ Error:', e))
req.end()
})
// Test 2: Native fetch in ShadowRealm - WORKS
console.log('\nTest 2: Native fetch in ShadowRealm')
const realm = new ShadowRealm()
realm.evaluate(`
fetch('https://httpbin.org/get')
.then(r => r.json())
.then(data => console.log('✓ Native fetch works'))
.catch(e => console.error('✗ Error:', e))
1
`)
await Bun.sleep(3000)
// Test 3: Node.js http IN ShadowRealm - BROKEN
console.log('\nTest 3: Node.js https.request IN ShadowRealm')
realm.evaluate(`
import('https').then(https => {
const req = https.request('https://httpbin.org/get', { method: 'GET' }, (res) => {
console.log('✓ Response callback, status:', res.statusCode) // NEVER CALLED
})
req.on('error', (e) => console.error('✗ Error:', e))
req.end()
})
1
`)
await Bun.sleep(5000)What is the expected behavior?
All three tests should print their success messages. The response callback in Test 3 should be called just like in Test 1.
What do you see instead?
Test 3 callback is never called. With BUN_CONFIG_VERBOSE_FETCH=curl, I can see the HTTP response IS received (< 200 OK), but the callback never fires.
Test 1 (no realm): ✓ works
Test 2 (realm + fetch): ✓ works
Test 3 (realm + http): ✗ callback never fires
Additional information
This breaks any library that uses Node.js http/https inside ShadowRealm (e.g., happy-dom's fetch implementation).
Output
% bun run bun-shadowrealm-bug.js
Test 1: Node.js https.request WITHOUT ShadowRealm
[fetch] $ curl --http1.1 "https://httpbin.org/get" -H "Connection: keep-alive" -H "User-Agent: Bun/1.3.4" -H "Accept: */*" -H "Host: httpbin.org"
[fetch] > HTTP/1.1 GET https://httpbin.org/get
[fetch] > Connection: keep-alive
[fetch] > User-Agent: Bun/1.3.4
[fetch] > Accept: */*
[fetch] > Host: httpbin.org
[fetch] < 200 OK
[fetch] < Date: Fri, 19 Dec 2025 14:54:06 GMT
[fetch] < Content-Type: application/json
[fetch] < Content-Length: 252
[fetch] < Connection: keep-alive
[fetch] < Server: gunicorn/19.9.0
[fetch] < Access-Control-Allow-Origin: *
[fetch] < Access-Control-Allow-Credentials: true
✓ Response callback, status: 200
Test 2: Native fetch in ShadowRealm
[fetch] $ curl --http1.1 "https://httpbin.org/get" -H "Connection: keep-alive" -H "User-Agent: Bun/1.3.4" -H "Accept: */*" -H "Host: httpbin.org" -H "Accept-Encoding: gzip, deflate, br, zstd" --compressed
[fetch] > HTTP/1.1 GET https://httpbin.org/get
[fetch] > Connection: keep-alive
[fetch] > User-Agent: Bun/1.3.4
[fetch] > Accept: */*
[fetch] > Host: httpbin.org
[fetch] > Accept-Encoding: gzip, deflate, br, zstd
[fetch] < 200 OK
[fetch] < Date: Fri, 19 Dec 2025 14:54:08 GMT
[fetch] < Content-Type: application/json
[fetch] < Content-Length: 303
[fetch] < Connection: keep-alive
[fetch] < Server: gunicorn/19.9.0
[fetch] < Access-Control-Allow-Origin: *
[fetch] < Access-Control-Allow-Credentials: true
✓ Native fetch works, origin: 95.31.232.55
Test 3: Node.js https.request IN ShadowRealm
Making request...
Request sent, waiting for callback...
[fetch] $ curl --http1.1 "https://httpbin.org/get" -H "Connection: keep-alive" -H "User-Agent: Bun/1.3.4" -H "Accept: */*" -H "Host: httpbin.org"
[fetch] > HTTP/1.1 GET https://httpbin.org/get
[fetch] > Connection: keep-alive
[fetch] > User-Agent: Bun/1.3.4
[fetch] > Accept: */*
[fetch] > Host: httpbin.org
[fetch] < 200 OK
[fetch] < Date: Fri, 19 Dec 2025 14:54:10 GMT
[fetch] < Content-Type: application/json
[fetch] < Content-Length: 252
[fetch] < Connection: keep-alive
[fetch] < Server: gunicorn/19.9.0
[fetch] < Access-Control-Allow-Origin: *
[fetch] < Access-Control-Allow-Credentials: true
--- Summary ---
Test 1 (no realm): ✓ works
Test 2 (realm + fetch): ✓ works
Test 3 (realm + http): ✗ callback never fires