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lib: allow Writeable.toWeb() to work on http.Outgoing message
Attempted to fix the issue by watering down the condition being
checked in internal/streams/utils isWritableNodeStream utility

Fixes: #44188
PR-URL: #45642
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Yagiz Nizipli <yagiz@nizipli.com>
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debadree25 authored and danielleadams committed Jan 3, 2023
1 parent ff03ed1 commit bbaca84
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Showing 2 changed files with 37 additions and 2 deletions.
10 changes: 8 additions & 2 deletions lib/internal/webstreams/adapters.js
Expand Up @@ -101,11 +101,17 @@ function newWritableStreamFromStreamWritable(streamWritable) {
// here because it will return false if streamWritable is a Duplex
// whose writable option is false. For a Duplex that is not writable,
// we want it to pass this check but return a closed WritableStream.
if (typeof streamWritable?._writableState !== 'object') {
// We check if the given stream is a stream.Writable or http.OutgoingMessage
const checkIfWritableOrOutgoingMessage =
streamWritable &&
typeof streamWritable?.write === 'function' &&
typeof streamWritable?.on === 'function';
if (!checkIfWritableOrOutgoingMessage) {
throw new ERR_INVALID_ARG_TYPE(
'streamWritable',
'stream.Writable',
streamWritable);
streamWritable
);
}

if (isDestroyed(streamWritable) || !isWritable(streamWritable)) {
Expand Down
29 changes: 29 additions & 0 deletions test/parallel/test-stream-toWeb-allows-server-response.js
@@ -0,0 +1,29 @@
'use strict';
const common = require('../common');
const { Writable } = require('stream');

const assert = require('assert');
const http = require('http');

// Check if Writable.toWeb works on the response object after creating a server.
const server = http.createServer(
common.mustCall((req, res) => {
const webStreamResponse = Writable.toWeb(res);
assert.strictEqual(webStreamResponse instanceof WritableStream, true);
res.end();
})
);

server.listen(
0,
common.mustCall(() => {
http.get(
{
port: server.address().port,
},
common.mustCall(() => {
server.close();
})
);
})
);

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