http: skip body and next message of CONNECT res

When handling a response to `CONNECT` request - skip message body
and do not attempt to parse the next message. `CONNECT` requests are
used in similar sense to HTTP Upgrade.

Fix: nodejs#6198

Author: indutny

lib/_http_client.js

@@ -432,7 +432,7 @@ function parserOnIncomingClient(res, shouldKeepAlive) {
   // Responses to CONNECT request is handled as Upgrade.
   if (req.method === 'CONNECT') {
     res.upgrade = true;
-    return true; // skip body
+    return 2; // skip body, and the rest
   }
 
   // Responses to HEAD requests are crazy.

lib/_http_common.js

@@ -96,7 +96,7 @@ function parserOnHeadersComplete(versionMajor, versionMinor, headers, method,
 
   parser.incoming.upgrade = upgrade;
 
-  var skipBody = false; // response to HEAD or CONNECT
+  var skipBody = 0; // response to HEAD or CONNECT
 
   if (!upgrade) {
     // For upgraded connections and CONNECT method request, we'll emit this
@@ -105,7 +105,10 @@ function parserOnHeadersComplete(versionMajor, versionMinor, headers, method,
     skipBody = parser.onIncoming(parser.incoming, shouldKeepAlive);
   }
 
-  return skipBody;
+  if (typeof skipBody !== 'number')
+    return skipBody ? 1 : 0;
+  else
+    return skipBody;
 }
 
 // XXX This is a mess.

src/node_http_parser.cc

@@ -300,7 +300,7 @@ class Parser : public AsyncWrap {
       return -1;
     }
 
-    return head_response->IsTrue() ? 1 : 0;
+    return head_response->IntegerValue();
   }