Revert "http: lazy create IncomingMessage.headers"

This reverts commit b58725c.

Fixes: #36550

PR-URL: #36553
Refs: #35281
Reviewed-By: Richard Lau <rlau@redhat.com>
Reviewed-By: Myles Borins <myles.borins@gmail.com>
Reviewed-By: Antoine du Hamel <duhamelantoine1995@gmail.com>
Reviewed-By: Michael Dawson <midawson@redhat.com>
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>

lib/_http_incoming.js

@@ -24,16 +24,10 @@
 const {
   ObjectDefineProperty,
   ObjectSetPrototypeOf,
-  Symbol
 } = primordials;
 
 const Stream = require('stream');
 
-const kHeaders = Symbol('kHeaders');
-const kHeadersCount = Symbol('kHeadersCount');
-const kTrailers = Symbol('kTrailers');
-const kTrailersCount = Symbol('kTrailersCount');
-
 function readStart(socket) {
   if (socket && !socket._paused && socket.readable)
     socket.resume();
@@ -64,11 +58,9 @@ function IncomingMessage(socket) {
   this.httpVersionMinor = null;
   this.httpVersion = null;
   this.complete = false;
-  this[kHeaders] = null;
-  this[kHeadersCount] = 0;
+  this.headers = {};
   this.rawHeaders = [];
-  this[kTrailers] = null;
-  this[kTrailersCount] = 0;
+  this.trailers = {};
   this.rawTrailers = [];
 
   this.aborted = false;
@@ -101,44 +93,6 @@ ObjectDefineProperty(IncomingMessage.prototype, 'connection', {
   }
 });
 
-ObjectDefineProperty(IncomingMessage.prototype, 'headers', {
-  get: function() {
-    if (!this[kHeaders]) {
-      this[kHeaders] = {};
-
-      const src = this.rawHeaders;
-      const dst = this[kHeaders];
-
-      for (let n = 0; n < this[kHeadersCount]; n += 2) {
-        this._addHeaderLine(src[n + 0], src[n + 1], dst);
-      }
-    }
-    return this[kHeaders];
-  },
-  set: function(val) {
-    this[kHeaders] = val;
-  }
-});
-
-ObjectDefineProperty(IncomingMessage.prototype, 'trailers', {
-  get: function() {
-    if (!this[kTrailers]) {
-      this[kTrailers] = {};
-
-      const src = this.rawTrailers;
-      const dst = this[kTrailers];
-
-      for (let n = 0; n < this[kTrailersCount]; n += 2) {
-        this._addHeaderLine(src[n + 0], src[n + 1], dst);
-      }
-    }
-    return this[kTrailers];
-  },
-  set: function(val) {
-    this[kTrailers] = val;
-  }
-});
-
 IncomingMessage.prototype.setTimeout = function setTimeout(msecs, callback) {
   if (callback)
     this.on('timeout', callback);
@@ -177,18 +131,14 @@ function _addHeaderLines(headers, n) {
     let dest;
     if (this.complete) {
       this.rawTrailers = headers;
-      this[kTrailersCount] = n;
-      dest = this[kTrailers];
+      dest = this.trailers;
     } else {
       this.rawHeaders = headers;
-      this[kHeadersCount] = n;
-      dest = this[kHeaders];
+      dest = this.headers;
     }
 
-    if (dest) {
-      for (let i = 0; i < n; i += 2) {
-        this._addHeaderLine(headers[i], headers[i + 1], dest);
-      }
+    for (let i = 0; i < n; i += 2) {
+      this._addHeaderLine(headers[i], headers[i + 1], dest);
     }
   }
 }