fix: request abort signal

Author: ronag

lib/api/api-request.js

@@ -6,7 +6,6 @@ const { InvalidArgumentError } = 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) {
@@ -56,19 +55,28 @@ class RequestHandler extends AsyncResource {
     this.onInfo = onInfo || null
     this.throwOnError = throwOnError
     this.highWaterMark = highWaterMark
+    this.signal = signal
 
     if (util.isStream(body)) {
       body.on('error', (err) => {
         this.onError(err)
       })
     }
 
-    addSignal(this, signal)
+    if (this.signal) {
+      this.removeAbortListener = util.addAbortListener(this.signal, () => {
+        if (this.res) {
+          this.res.destroy(this.signal.reason)
+        } else {
+          this.abort(this.signal.reason)
+        }
+      })
+    }
   }
 
   onConnect (abort, context) {
-    if (this.reason) {
-      abort(this.reason)
+    if (this.signal && this.signal.aborted) {
+      abort(this.signal.reason)
       return
     }
 
@@ -95,6 +103,13 @@ 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 +138,6 @@ class RequestHandler extends AsyncResource {
   onComplete (trailers) {
     const { res } = this
 
-    removeSignal(this)
-
     util.parseHeaders(trailers, this.trailers)
 
     res.push(null)
@@ -133,8 +146,6 @@ class RequestHandler extends AsyncResource {
   onError (err) {
     const { res, callback, body, opaque } = this
 
-    removeSignal(this)
-
     if (callback) {
       // TODO: Does this need queueMicrotask?
       this.callback = null
@@ -149,6 +160,8 @@ class RequestHandler extends AsyncResource {
       queueMicrotask(() => {
         util.destroy(res, err)
       })
+    } else if (this.removeAbortListener) {
+      this.removeAbortListener()
     }
 
     if (body) {

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
+})