lib: use null-prototype objects for property descriptors

Refs: nodejs#42921

PR-URL: nodejs#43270
Reviewed-By: Paolo Insogna <[email protected]>
Reviewed-By: Matteo Collina <[email protected]>
Reviewed-By: Chengzhong Wu <[email protected]>
Reviewed-By: Minwoo Jung <[email protected]>

Author: aduh95

lib/_http_incoming.js

@@ -98,6 +98,7 @@ ObjectSetPrototypeOf(IncomingMessage.prototype, Readable.prototype);
 ObjectSetPrototypeOf(IncomingMessage, Readable);
 
 ObjectDefineProperty(IncomingMessage.prototype, 'connection', {
+  __proto__: null,
   get: function() {
     return this.socket;
   },
@@ -107,6 +108,7 @@ ObjectDefineProperty(IncomingMessage.prototype, 'connection', {
 });
 
 ObjectDefineProperty(IncomingMessage.prototype, 'headers', {
+  __proto__: null,
   get: function() {
     if (!this[kHeaders]) {
       this[kHeaders] = {};
@@ -126,6 +128,7 @@ ObjectDefineProperty(IncomingMessage.prototype, 'headers', {
 });
 
 ObjectDefineProperty(IncomingMessage.prototype, 'headersDistinct', {
+  __proto__: null,
   get: function() {
     if (!this[kHeadersDistinct]) {
       this[kHeadersDistinct] = {};
@@ -145,6 +148,7 @@ ObjectDefineProperty(IncomingMessage.prototype, 'headersDistinct', {
 });
 
 ObjectDefineProperty(IncomingMessage.prototype, 'trailers', {
+  __proto__: null,
   get: function() {
     if (!this[kTrailers]) {
       this[kTrailers] = {};
@@ -164,6 +168,7 @@ ObjectDefineProperty(IncomingMessage.prototype, 'trailers', {
 });
 
 ObjectDefineProperty(IncomingMessage.prototype, 'trailersDistinct', {
+  __proto__: null,
   get: function() {
     if (!this[kTrailersDistinct]) {
       this[kTrailersDistinct] = {};

lib/_http_outgoing.js

@@ -145,6 +145,7 @@ ObjectSetPrototypeOf(OutgoingMessage.prototype, Stream.prototype);
 ObjectSetPrototypeOf(OutgoingMessage, Stream);
 
 ObjectDefineProperty(OutgoingMessage.prototype, 'writableFinished', {
+  __proto__: null,
   get() {
     return (
       this.finished &&
@@ -155,31 +156,36 @@ ObjectDefineProperty(OutgoingMessage.prototype, 'writableFinished', {
 });
 
 ObjectDefineProperty(OutgoingMessage.prototype, 'writableObjectMode', {
+  __proto__: null,
   get() {
     return false;
   }
 });
 
 ObjectDefineProperty(OutgoingMessage.prototype, 'writableLength', {
+  __proto__: null,
   get() {
     return this.outputSize + (this.socket ? this.socket.writableLength : 0);
   }
 });
 
 ObjectDefineProperty(OutgoingMessage.prototype, 'writableHighWaterMark', {
+  __proto__: null,
   get() {
     return this.socket ? this.socket.writableHighWaterMark : HIGH_WATER_MARK;
   }
 });
 
 ObjectDefineProperty(OutgoingMessage.prototype, 'writableCorked', {
+  __proto__: null,
   get() {
     const corked = this.socket ? this.socket.writableCorked : 0;
     return corked + this[kCorked];
   }
 });
 
 ObjectDefineProperty(OutgoingMessage.prototype, '_headers', {
+  __proto__: null,
   get: internalUtil.deprecate(function() {
     return this.getHeaders();
   }, 'OutgoingMessage.prototype._headers is deprecated', 'DEP0066'),
@@ -200,6 +206,7 @@ ObjectDefineProperty(OutgoingMessage.prototype, '_headers', {
 });
 
 ObjectDefineProperty(OutgoingMessage.prototype, 'connection', {
+  __proto__: null,
   get: function() {
     return this.socket;
   },
@@ -209,6 +216,7 @@ ObjectDefineProperty(OutgoingMessage.prototype, 'connection', {
 });
 
 ObjectDefineProperty(OutgoingMessage.prototype, '_headerNames', {
+  __proto__: null,
   get: internalUtil.deprecate(function() {
     const headers = this[kOutHeaders];
     if (headers !== null) {
@@ -731,16 +739,19 @@ OutgoingMessage.prototype._implicitHeader = function _implicitHeader() {
 };
 
 ObjectDefineProperty(OutgoingMessage.prototype, 'headersSent', {
+  __proto__: null,
   configurable: true,
   enumerable: true,
   get: function() { return !!this._header; }
 });
 
 ObjectDefineProperty(OutgoingMessage.prototype, 'writableEnded', {
+  __proto__: null,
   get: function() { return this.finished; }
 });
 
 ObjectDefineProperty(OutgoingMessage.prototype, 'writableNeedDrain', {
+  __proto__: null,
   get: function() {
     return !this.destroyed && !this.finished && this[kNeedDrain];
   }