From b9b00e2c2bacbed4bb8e952a540f4742f77a08dd Mon Sep 17 00:00:00 2001
From: theanarkh <theratliter@gmail.com>
Date: Mon, 25 Jul 2022 05:19:12 +0800
Subject: [PATCH] http: make idle http parser count configurable

---
 doc/api/http.md                                     | 10 ++++++++++
 lib/http.js                                         |  9 +++++++--
 test/parallel/test-http-set-max-idle-http-parser.js |  8 ++++++++
 3 files changed, 25 insertions(+), 2 deletions(-)
 create mode 100644 test/parallel/test-http-set-max-idle-http-parser.js

diff --git a/doc/api/http.md b/doc/api/http.md
index 08bb937e4c92a4..be023f7bc22965 100644
--- a/doc/api/http.md
+++ b/doc/api/http.md
@@ -3633,6 +3633,16 @@ try {
 }
 ```
 
+## `http.setMaxIdleHTTPParsers`
+
+<!-- YAML
+added: REPLACEME
+-->
+
+* {number}
+
+Set the maximum number of idle HTTP parsers. **Default:** `1000`.
+
 [RFC 8187]: https://www.rfc-editor.org/rfc/rfc8187.txt
 [`'checkContinue'`]: #event-checkcontinue
 [`'finish'`]: #event-finish
diff --git a/lib/http.js b/lib/http.js
index 1366656e42eb94..d6d198bb587876 100644
--- a/lib/http.js
+++ b/lib/http.js
@@ -27,9 +27,10 @@ const {
   ObjectDefineProperty,
 } = primordials;
 
+const { validateInteger } = require('internal/validators');
 const httpAgent = require('_http_agent');
 const { ClientRequest } = require('_http_client');
-const { methods } = require('_http_common');
+const { methods, parsers } = require('_http_common');
 const { IncomingMessage } = require('_http_incoming');
 const {
   validateHeaderName,
@@ -123,7 +124,11 @@ module.exports = {
   validateHeaderName,
   validateHeaderValue,
   get,
-  request
+  request,
+  setMaxIdleHTTPParsers(max) {
+    validateInteger(max, 'max');
+    parsers.max = max;
+  }
 };
 
 ObjectDefineProperty(module.exports, 'maxHeaderSize', {
diff --git a/test/parallel/test-http-set-max-idle-http-parser.js b/test/parallel/test-http-set-max-idle-http-parser.js
new file mode 100644
index 00000000000000..4256c89b58ab98
--- /dev/null
+++ b/test/parallel/test-http-set-max-idle-http-parser.js
@@ -0,0 +1,8 @@
+'use strict';
+require('../common');
+const assert = require('assert');
+const httpCommon = require('_http_common');
+const http = require('http');
+assert(httpCommon.parsers.max !== 1);
+http.setMaxIdleHTTPParsers(1);
+assert.strictEqual(httpCommon.parsers.max, 1);