From f82439b6a03c87ae48d16fee479db10eb3b4a3d1 Mon Sep 17 00:00:00 2001
From: XadillaX <i@2333.moe>
Date: Thu, 14 Dec 2017 12:40:32 +0800
Subject: [PATCH] http: add rawPacket in err of `clientError` event

The `rawPacket` is the current buffer that just parsed. Adding this
buffer to the error object of `clientError` event is to make it possible
that developers can log the broken packet.

PR-URL: https://github.com/nodejs/node/pull/17672
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: James M Snell <jasnell@gmail.com>
---
 doc/api/http.md                                | 11 +++++++++++
 lib/_http_server.js                            |  1 +
 test/parallel/test-http-server-client-error.js |  6 ++++++
 3 files changed, 18 insertions(+)

diff --git a/doc/api/http.md b/doc/api/http.md
index 9f06296e6e2584..928ed0d972b472 100644
--- a/doc/api/http.md
+++ b/doc/api/http.md
@@ -734,6 +734,11 @@ changes:
     description: The default action of calling `.destroy()` on the `socket`
                  will no longer take place if there are listeners attached
                  for `clientError`.
+  - version: REPLACEME
+    pr-url: https://github.com/nodejs/node/pull/17672
+    description: The rawPacket is the current buffer that just parsed. Adding
+                 this buffer to the error object of clientError event is to make
+                 it possible that developers can log the broken packet.
 -->
 
 * `exception` {Error}
@@ -765,6 +770,12 @@ object, so any HTTP response sent, including response headers and payload,
 *must* be written directly to the `socket` object. Care must be taken to
 ensure the response is a properly formatted HTTP response message.
 
+`err` is an instance of `Error` with two extra columns:
+
++ `bytesParsed`: the bytes count of request packet that Node.js may have parsed
+  correctly;
++ `rawPacket`: the raw packet of current request.
+
 ### Event: 'close'
 <!-- YAML
 added: v0.1.4
diff --git a/lib/_http_server.js b/lib/_http_server.js
index cab48245010ae7..5857e43d79c787 100644
--- a/lib/_http_server.js
+++ b/lib/_http_server.js
@@ -476,6 +476,7 @@ function onParserExecuteCommon(server, socket, parser, state, ret, d) {
   resetSocketTimeout(server, socket, state);
 
   if (ret instanceof Error) {
+    ret.rawPacket = d || parser.getCurrentBuffer();
     debug('parse error', ret);
     socketOnError.call(socket, ret);
   } else if (parser.incoming && parser.incoming.upgrade) {
diff --git a/test/parallel/test-http-server-client-error.js b/test/parallel/test-http-server-client-error.js
index 88c224f8374145..ffe78941553367 100644
--- a/test/parallel/test-http-server-client-error.js
+++ b/test/parallel/test-http-server-client-error.js
@@ -10,6 +10,12 @@ const server = http.createServer(common.mustCall(function(req, res) {
 }));
 
 server.on('clientError', common.mustCall(function(err, socket) {
+  assert.strictEqual(err instanceof Error, true);
+  assert.strictEqual(err.code, 'HPE_INVALID_METHOD');
+  assert.strictEqual(err.bytesParsed, 1);
+  assert.strictEqual(err.message, 'Parse Error');
+  assert.strictEqual(err.rawPacket.toString(), 'Oopsie-doopsie\r\n');
+
   socket.end('HTTP/1.1 400 Bad Request\r\n\r\n');
 
   server.close();