http: preserve socket errors as response error causes

Keep the original socket error as the cause of ECONNRESET errors emitted
when an HTTP response closes before completion. Preserve the existing
aborted message, error code, and event order. Leave cause absent when
there is no underlying error.

Allow ConnResetException to accept Error options, document the behavior,
and cover TLS record errors, TCP resets, explicit destruction, and
premature closure without a socket error.

This follows investigation of #66001 and addresses lost error context.
The original TLS decryption failure remains unresolved.

Refs: #66001
Signed-off-by: XadillaX <i@2333.moe>
PR-URL: #66061
Reviewed-By: Robert Nagy <ronagy@icloud.com>
Reviewed-By: Tim Perry <pimterry@gmail.com>

Author: XadillaX

doc/api/http.md

@@ -4325,6 +4325,13 @@ the following events will be emitted in the following order:
   `'Error: aborted'` and code `'ECONNRESET'`
 * `'close'` on the `res` object
 
+If a socket error (such as a TLS error) causes the premature close, that error
+is emitted on the request before the close. The error emitted on the incomplete
+response retains the message `'aborted'` and code `'ECONNRESET'`, with the original
+socket error available as its `cause`. This also applies when the original socket
+error has code `'ECONNRESET'`. If no underlying error is available, the response
+error has no `cause` property.
+
 If `req.destroy()` is called before a socket is assigned, the following
 events will be emitted in the following order:
 
@@ -4352,7 +4359,8 @@ events will be emitted in the following order:
 * `'aborted'` on the `res` object
 * `'close'`
 * `'error'` on the `res` object with an error with message `'Error: aborted'`
-  and code `'ECONNRESET'`, or the error with which `req.destroy()` was called
+  and code `'ECONNRESET'`. If an error was passed to `req.destroy()`, it is
+  available as the response error's `cause`.
 * `'close'` on the `res` object
 
 If `req.abort()` is called before a socket is assigned, the following

lib/_http_client.js

@@ -738,7 +738,8 @@ function socketCloseListener() {
   if (res) {
     // Socket closed before we emitted 'end' below.
     if (!res.complete) {
-      res.destroy(new ConnResetException('aborted'));
+      res.destroy(new ConnResetException('aborted',
+                                         req[kError] ? { cause: req[kError] } : undefined));
     }
     req._closed = true;
     req.emit('close');
@@ -779,6 +780,9 @@ function socketErrorListener(err) {
     // and we need to make sure we don't double-fire the error event.
     socket._hadError = true;
     emitErrorEvent(req, err);
+    // Preserve the socket error for an incomplete response, including TLS
+    // errors that are emitted without setting socket.errored.
+    req[kError] ||= err;
   }
 
   const parser = socket.parser;

lib/internal/errors.js

@@ -845,8 +845,8 @@ class DNSException extends Error {
 }
 
 class ConnResetException extends Error {
-  constructor(msg) {
-    super(msg);
+  constructor(msg, options) {
+    super(msg, options);
     this.code = 'ECONNRESET';
   }
 

test/parallel/test-http-response-socket-error.js

@@ -0,0 +1,82 @@
+'use strict';
+
+const common = require('../common');
+const assert = require('assert');
+const http = require('http');
+const { Writable, pipeline } = require('stream');
+
+for (const method of ['emit', 'emitAndDestroy', 'socketDestroy', 'requestDestroy', 'reset', 'close']) {
+  let error = method === 'close' || method === 'reset' ? null : new Error('Socket failure');
+  let serverSocket;
+  const server = http.createServer(common.mustCall((req, res) => {
+    serverSocket = req.socket;
+    res.writeHead(200, { 'Content-Length': 100 });
+    res.write('partial body');
+  }));
+
+  server.listen(0, common.mustCall(() => {
+    const req = http.get({
+      port: server.address().port,
+      agent: false,
+    }, common.mustCall((res) => {
+      res.on('aborted', common.mustCall());
+      res.on('close', common.mustCall());
+      pipeline(res, new Writable({
+        write(chunk, encoding, callback) {
+          callback();
+        },
+      }), common.mustCall((err) => {
+        assert.strictEqual(res.complete, false);
+        assert.strictEqual(res.aborted, true);
+        assert.strictEqual(err.code, 'ECONNRESET');
+        assert.strictEqual(err.message, 'aborted');
+        assert.strictEqual(res.errored, err);
+        if (error) {
+          assert.notStrictEqual(err, error);
+          assert.strictEqual(err.cause, error);
+          assert.deepStrictEqual(Object.getOwnPropertyDescriptor(err, 'cause'), {
+            value: error,
+            writable: true,
+            enumerable: false,
+            configurable: true,
+          });
+        } else {
+          assert.strictEqual(Object.hasOwn(err, 'cause'), false);
+        }
+        server.close(common.mustCall());
+      }));
+
+      switch (method) {
+        case 'emit':
+        case 'emitAndDestroy':
+          // TLSSocket can emit an error without setting socket.errored.
+          req.socket.emit('error', error);
+          break;
+        case 'socketDestroy':
+          req.socket.destroy(error);
+          break;
+        case 'requestDestroy':
+          req.destroy(error);
+          break;
+        case 'reset':
+          serverSocket.resetAndDestroy();
+          break;
+        case 'close':
+          req.socket.destroy();
+          break;
+      }
+    }));
+    req.on('error', method !== 'close' ? common.mustCall((err) => {
+      if (method === 'reset') {
+        assert.strictEqual(err.code, 'ECONNRESET');
+        assert.strictEqual(err.syscall, 'read');
+        error = err;
+      } else {
+        assert.strictEqual(err, error);
+      }
+      if (method === 'emitAndDestroy')
+        req.destroy();
+    }) : common.mustNotCall());
+    req.on('close', common.mustCall());
+  }));
+}

test/parallel/test-https-response-tls-error.js

@@ -0,0 +1,83 @@
+'use strict';
+
+const common = require('../common');
+if (!common.hasCrypto)
+  common.skip('missing crypto');
+
+const assert = require('assert');
+const https = require('https');
+const { Writable, pipeline } = require('stream');
+const fixtures = require('../common/fixtures');
+
+// Verify error propagation after receiving response headers. The invalid
+// record deliberately causes a TLS error; it does not reproduce #66001's
+// failure to decrypt an intact stream under backpressure.
+for (const version of ['TLSv1.2', 'TLSv1.3']) {
+  let transport;
+  let requestError;
+  const events = [];
+  const server = https.createServer({
+    key: fixtures.readKey('agent1-key.pem'),
+    cert: fixtures.readKey('agent1-cert.pem'),
+    minVersion: version,
+    maxVersion: version,
+  }, common.mustCall((req, res) => {
+    res.writeHead(200, { 'Content-Length': 100 });
+    res.write('partial body');
+  }));
+  server.on('connection', common.mustCall((socket) => {
+    transport = socket;
+  }));
+
+  server.listen(0, common.mustCall(() => {
+    const req = https.get({
+      port: server.address().port,
+      rejectUnauthorized: false,
+      agent: false,
+    }, common.mustCall((res) => {
+      assert.strictEqual(res.complete, false);
+      res.on('aborted', common.mustCall(() => events.push('aborted')));
+      res.on('error', common.mustCall((err) => {
+        events.push('response error');
+        assert.strictEqual(err.code, 'ECONNRESET');
+        assert.strictEqual(err.message, 'aborted');
+        assert.strictEqual(err.cause, requestError);
+      }));
+      res.on('close', common.mustCall(() => {
+        events.push('response close');
+        assert.deepStrictEqual(events, [
+          'request error',
+          'aborted',
+          'request close',
+          'response error',
+          'response close',
+        ]);
+      }));
+
+      pipeline(res, new Writable({
+        write(chunk, encoding, callback) {
+          callback();
+        },
+      }), common.mustCall((err) => {
+        assert.strictEqual(err, res.errored);
+        assert.strictEqual(err.cause, requestError);
+        assert.strictEqual(res.complete, false);
+        assert.strictEqual(res.aborted, true);
+        server.close(common.mustCall());
+        transport.destroy();
+      }));
+
+      // Bypass the server's TLSSocket to send an invalid application-data
+      // record after the client has received part of the HTTP response.
+      const record = Buffer.alloc(37);
+      record.set([23, 3, 3, 0, 32]);
+      transport.write(record);
+    }));
+    req.on('error', common.mustCall((err) => {
+      events.push('request error');
+      assert.match(err.code, /^ERR_SSL_/);
+      requestError = err;
+    }));
+    req.on('close', common.mustCall(() => events.push('request close')));
+  }));
+}