http: expose headers on an http.ClientRequest "information" event

1xx intermediate status responses are allowed to have headers; so
expose the "httpVersion", "httpVersionMajor", "httpVersionMinor",
"headers", "rawHeaders", and "statusMessage" properties on this
event.

PR-URL: https://github.com/nodejs/node/pull/28459
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
Reviewed-By: Rich Trott <rtrott@gmail.com>

1 files changed, 11 insertions, 3 deletions

diff --git a/doc/api/http.md b/doc/api/http.md
index 999cb4da4c..17e60e2fa5 100644
--- a/doc/api/http.md
+++ b/doc/api/http.md
@@ -421,10 +421,18 @@ added: v10.0.0
 -->
 
 * `info` {Object}
+  * `httpVersion` {string}
+  * `httpVersionMajor` {integer}
+  * `httpVersionMinor` {integer}
   * `statusCode` {integer}
-
-Emitted when the server sends a 1xx response (excluding 101 Upgrade). The
-listeners of this event will receive an object containing the status code.
+  * `statusMessage` {string}
+  * `headers` {Object}
+  * `rawHeaders` {string[]}
+
+Emitted when the server sends a 1xx intermediate response (excluding 101
+Upgrade). The listeners of this event will receive an object containing the
+HTTP version, status code, status message, key-value headers object,
+and array with the raw header names followed by their respective values.
 
 ```js
 const http = require('http');