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, 9 insertions, 1 deletions

diff --git a/lib/_http_client.js b/lib/_http_client.js
index fcd7ca90ac..11e946c893 100644
--- a/lib/_http_client.js
+++ b/lib/_http_client.js
@@ -545,7 +545,15 @@ function parserOnIncomingClient(res, shouldKeepAlive) {
       req.emit('continue');
     }
     // Send information events to all 1xx responses except 101 Upgrade.
-    req.emit('information', { statusCode: res.statusCode });
+    req.emit('information', {
+      statusCode: res.statusCode,
+      statusMessage: res.statusMessage,
+      httpVersion: res.httpVersion,
+      httpVersionMajor: res.httpVersionMajor,
+      httpVersionMinor: res.httpVersionMinor,
+      headers: res.headers,
+      rawHeaders: res.rawHeaders
+    });
 
     return 1;  // Skip body but don't treat as Upgrade.
   }