http: setEncoding error for incoming packets

lib/_http_server.js

@@ -363,6 +363,7 @@ function connectionListenerInternal(server, socket) {
 
   // Override on to unconsume on `data`, `readable` listeners
   socket.on = socketOnWrap;
+  socket.setEncoding = socketSetEncoding;
 
   // We only consume the socket if it has never been consumed before.
   if (socket._handle) {
@@ -379,7 +380,6 @@ function connectionListenerInternal(server, socket) {
   socket._paused = false;
 }
 
-
 function updateOutgoingData(socket, state, delta) {
   state.outgoingData += delta;
   if (socket._paused &&
@@ -454,7 +454,6 @@ function socketOnEnd(server, socket, parser, state) {
 function socketOnData(server, socket, parser, state, d) {
   assert(!socket._paused);
   debug('SERVER socketOnData %d', d.length);
-
   var ret = parser.execute(d);
   onParserExecuteCommon(server, socket, parser, state, ret, d);
 }
@@ -663,6 +662,10 @@ function onSocketPause() {
   }
 }
 
+function socketSetEncoding() {
+  throw new errors.Error('ERR_METHOD_NOT_IMPLEMENTED', 'setEncoding');
+}
+
 function unconsume(parser, socket) {
   if (socket._handle) {
     if (parser._consumed)

test/parallel/test-http-socket-encoding-error.js

@@ -0,0 +1,23 @@
+'use strict';
+
+const common = require('../common');
+const http = require('http');
+
+const server = http.createServer().listen(0, connectToServer);
+
+server.on('connection', (socket) => {
+  common.expectsError(() => socket.setEncoding(''),
+                      {
+                        code: 'ERR_METHOD_NOT_IMPLEMENTED',
+                        type: Error
+                      });
+
+  socket.end();
+});
+
+function connectToServer() {
+  const client = new http.Agent().createConnection(this.address().port, () => {
+    client.end();
+  })
+    .on('end', () => server.close());
+}