http: fix undefined error in parser event

The current check for socket.server[kIncomingMessage] does not account for the possibility of a socket.server that doesn't have that property defined. Fix it. Backport-PR-URL: #22880 PR-URL: #20029Fixes: #19231 Reviewed-By: Ben Noordhuis <[email protected]> Reviewed-By: Luigi Pinca <[email protected]> Reviewed-By: Trivikram Kamat <[email protected]> Reviewed-By: James M Snell <[email protected]> Reviewed-By: Ruben Bridgewater <[email protected]> Reviewed-By: Khaidi Chu <[email protected]>

Author: apapirovski

lib/_http_common.js

@@ -62,7 +62,8 @@ function parserOnHeaders(headers, url){
 functionparserOnHeadersComplete(versionMajor,versionMinor,headers,method,
 url,statusCode,statusMessage,upgrade,
 shouldKeepAlive){
-varparser=this;
+constparser=this;
+const{ socket }=parser;
 
 if(!headers){
 headers=parser._headers;
@@ -75,10 +76,11 @@ function parserOnHeadersComplete(versionMajor, versionMinor, headers, method,
 }
 
 // Parser is also used by http client
-varParserIncomingMessage=parser.socket&&parser.socket.server ?
-parser.socket.server[kIncomingMessage] : IncomingMessage;
+constParserIncomingMessage=(socket&&socket.server&&
+socket.server[kIncomingMessage])||
+IncomingMessage;
 
-parser.incoming=newParserIncomingMessage(parser.socket);
+parser.incoming=newParserIncomingMessage(socket);
 parser.incoming.httpVersionMajor=versionMajor;
 parser.incoming.httpVersionMinor=versionMinor;
 parser.incoming.httpVersion=`${versionMajor}.${versionMinor}`;