From 9f26afffe5c310f8b9d520f037e4f583613e2ca0 Mon Sep 17 00:00:00 2001
From: Robert Nagy <ronagy@icloud.com>
Date: Tue, 7 May 2024 10:33:15 +0200
Subject: [PATCH] fix: request abort signal (#3209)

* fix: request abort signal

* fixup

* fixup

* fixup
---
 lib/api/api-request.js | 36 ++++++++++++++++----
 test/issue-2590.js     |  4 +--
 test/request-signal.js | 76 ++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 108 insertions(+), 8 deletions(-)
 create mode 100644 test/request-signal.js

diff --git a/lib/api/api-request.js b/lib/api/api-request.js
index e5d598aa6dd..f70f351f2dc 100644
--- a/lib/api/api-request.js
+++ b/lib/api/api-request.js
@@ -2,11 +2,10 @@
 
 const assert = require('node:assert')
 const { Readable } = require('./readable')
-const { InvalidArgumentError } = require('../core/errors')
+const { InvalidArgumentError, RequestAbortedError } = require('../core/errors')
 const util = require('../core/util')
 const { getResolveErrorBodyCallback } = require('./util')
 const { AsyncResource } = require('node:async_hooks')
-const { addSignal, removeSignal } = require('./abort-signal')
 
 class RequestHandler extends AsyncResource {
   constructor (opts, callback) {
@@ -56,6 +55,9 @@ class RequestHandler extends AsyncResource {
     this.onInfo = onInfo || null
     this.throwOnError = throwOnError
     this.highWaterMark = highWaterMark
+    this.signal = signal
+    this.reason = null
+    this.removeAbortListener = null
 
     if (util.isStream(body)) {
       body.on('error', (err) => {
@@ -63,7 +65,23 @@ class RequestHandler extends AsyncResource {
       })
     }
 
-    addSignal(this, signal)
+    if (this.signal) {
+      if (this.signal.aborted) {
+        this.reason = this.signal.reason ?? new RequestAbortedError()
+      } else {
+        this.removeAbortListener = util.addAbortListener(this.signal, () => {
+          this.removeAbortListener?.()
+          this.removeAbortListener = null
+
+          this.reason = this.signal.reason ?? new RequestAbortedError()
+          if (this.res) {
+            util.destroy(this.res, this.reason)
+          } else if (this.abort) {
+            this.abort(this.reason)
+          }
+        })
+      }
+    }
   }
 
   onConnect (abort, context) {
@@ -95,6 +113,13 @@ class RequestHandler extends AsyncResource {
     const contentLength = parsedHeaders['content-length']
     const body = new Readable({ resume, abort, contentType, contentLength, highWaterMark })
 
+    if (this.removeAbortListener) {
+      // TODO (fix): 'close' is sufficient but breaks tests.
+      body
+        .on('end', this.removeAbortListener)
+        .on('error', this.removeAbortListener)
+    }
+
     this.callback = null
     this.res = body
     if (callback !== null) {
@@ -123,8 +148,6 @@ class RequestHandler extends AsyncResource {
   onComplete (trailers) {
     const { res } = this
 
-    removeSignal(this)
-
     util.parseHeaders(trailers, this.trailers)
 
     res.push(null)
@@ -133,7 +156,8 @@ class RequestHandler extends AsyncResource {
   onError (err) {
     const { res, callback, body, opaque } = this
 
-    removeSignal(this)
+    this.removeAbortListener?.()
+    this.removeAbortListener = null
 
     if (callback) {
       // TODO: Does this need queueMicrotask?
diff --git a/test/issue-2590.js b/test/issue-2590.js
index c5499bf4513..1da0b23f20a 100644
--- a/test/issue-2590.js
+++ b/test/issue-2590.js
@@ -27,12 +27,12 @@ test('aborting request with custom reason', async (t) => {
 
   await t.rejects(
     request(`http://localhost:${server.address().port}`, { signal: ac.signal }),
-    /Request aborted/
+    /Error: aborted/
   )
 
   await t.rejects(
     request(`http://localhost:${server.address().port}`, { signal: ac2.signal }),
-    { code: 'UND_ERR_ABORTED' }
+    { name: 'AbortError' }
   )
 
   await t.completed
diff --git a/test/request-signal.js b/test/request-signal.js
new file mode 100644
index 00000000000..fd4d2f885a5
--- /dev/null
+++ b/test/request-signal.js
@@ -0,0 +1,76 @@
+'use strict'
+
+const { createServer } = require('node:http')
+const { test, after } = require('node:test')
+const { tspl } = require('@matteo.collina/tspl')
+const { request } = require('..')
+
+test('pre abort signal w/ reason', async (t) => {
+  t = tspl(t, { plan: 1 })
+
+  const server = createServer((req, res) => {
+    res.end('asd')
+  })
+  after(() => server.close())
+
+  server.listen(0, async () => {
+    const ac = new AbortController()
+    const _err = new Error()
+    ac.abort(_err)
+    try {
+      await request(`http://0.0.0.0:${server.address().port}`, { signal: ac.signal })
+    } catch (err) {
+      t.equal(err, _err)
+    }
+  })
+  await t.completed
+})
+
+test('post abort signal', async (t) => {
+  t = tspl(t, { plan: 1 })
+
+  const server = createServer((req, res) => {
+    res.end('asd')
+  })
+  after(() => server.close())
+
+  server.listen(0, async () => {
+    const ac = new AbortController()
+    const ures = await request(`http://0.0.0.0:${server.address().port}`, { signal: ac.signal })
+    ac.abort()
+    try {
+      /* eslint-disable-next-line no-unused-vars */
+      for await (const chunk of ures.body) {
+        // Do nothing...
+      }
+    } catch (err) {
+      t.equal(err.name, 'AbortError')
+    }
+  })
+  await t.completed
+})
+
+test('post abort signal w/ reason', async (t) => {
+  t = tspl(t, { plan: 1 })
+
+  const server = createServer((req, res) => {
+    res.end('asd')
+  })
+  after(() => server.close())
+
+  server.listen(0, async () => {
+    const ac = new AbortController()
+    const _err = new Error()
+    const ures = await request(`http://0.0.0.0:${server.address().port}`, { signal: ac.signal })
+    ac.abort(_err)
+    try {
+      /* eslint-disable-next-line no-unused-vars */
+      for await (const chunk of ures.body) {
+        // Do nothing...
+      }
+    } catch (err) {
+      t.equal(err, _err)
+    }
+  })
+  await t.completed
+})