message CMsgBase
{
    required CMsgHead msghead           = 1;
    optional bytes msgbody              = 2;
}

message CMsgHead
{
    required int32 msgtype                = 1;
    required int32 msgcode                = 2;
}

var CMsgBase = RootSocket.root.lookup("CMsgBase");
var CMsgHead = RootSocket.root.lookup("CMsgHead");

var cmsgHead = CMsgBase.create(
    {
        msgtype: 102,
        msgcode: 1
    }
);

// Create a new message
var cmsgBase = CMsgBase.create(
    {
        msghead: cmsgHead
    }
);
console.log(cmsgBase);

var buffer = CMsgBase.encode(cmsgBase).finish();
console.log('CMsgBase:');
console.log(buffer.length);
console.log(buffer);

_CMsgBase$ctor {
  msghead: _CMsgBase$ctor { msgtype: 102, msgcode: 1 } }
CMsgBase:
6
<Buffer 0a 04 08 66 10 01>

var CS_Login = RootSocket.root.lookup("CS_Login");
var cmsgBody = CS_Login.create(
    {
        path: '1',
        platId: '1',
        roleId: '1'
    }
);
var cmsgBase = CMsgBase.create(
    {
        msghead: cmsgHead,
        msgbody: CS_Login.encode(cmsgBody).finish()
    }
);
console.log(cmsgBase);
var buffer = CMsgBase.encode(cmsgBase).finish();
console.log('CMsgBase:');
console.log(buffer.length);
console.log(buffer);

_CMsgBase$ctor {
  msghead: _CMsgBase$ctor { msgtype: 102, msgcode: 1 },
  msgbody: <Buffer 0a 01 31 12 01 31 1a 01 31> }
(node) Buffer.set is deprecated. Use array indexes instead.
CMsgBase:
17
<Buffer 08 04 08 66 10 01 12 09 d0 8e e5 00 01 00 00 00 88>

msgbody: <Buffer 0a 01 31 12 01 31 1a 01 31> [9]
CMsgBase: <Buffer 0a 04 08 66 10 01 12 09 0a 01 31 12 01 31 1a 01 31> [17]

message = new CMsgBase()
message.msghead.msgtype = 102
message.msghead.msgcode = 1

params = CS_Login()
params.path = '1'
params.platId = '1'
params.roleId = '1'
message.msgbody = params.SerializeToString()

print message.SerializeToString()