Sending objects between a java client and a C# server (using TCP and BinaryFormatter)

Question

I'm trying to develop client server application which can transfer Files and Strings from Client to Server. I'm new to TCP, sockets and server transactions.

Client side is written in Java and Server Side is Written in C#

what I'm trying to do in Server(C#) , get all the bytes and cast it to an Object, because I'm sending all the Objects from client side in Object type. then i wanted to cast to File or String

but in this line of code I'm getting an error

Object myObject = (Object)binForm.Deserialize(memStream);

Server side:-

private void ClientHandler(object client)
    {
        int bytesRead = 0;
        byte[] buffer = new byte[32];

        tcpClient = (TcpClient)client;
        clientStream = tcpClient.GetStream();

        Console.WriteLine("Client Handler Started!");

        while (true)
        {
            bytesRead = 0;

            try
            {
                Console.WriteLine("Server waiting for commands\n");

                MemoryStream memStream = new MemoryStream();
                BinaryFormatter binForm = new BinaryFormatter();


                while ((bytesRead = tcpClient.Client.Receive(buffer)) > 0)
                {

                    Console.WriteLine("bytes received :- " + bytesRead);

                    memStream.Write(buffer, 0, bytesRead);                        

                }
                try
                {

                    memStream.Position = 0;

                    Object myObject = (Object)binForm.Deserialize(memStream);
                    // After this cast it to String or File 

                }
                catch(Exception exp)
                {                       
                    Console.WriteLine(exp.ToString());
                }

            }
            catch
            {
                //a socket error has occured
                Console.WriteLine("a socket error has occured!!!");
                break;
            }
        }

Exception is "End of Stream encountered before parsing was completed" — Hasitha Weerasinghe
– Hasitha Weerasinghe, Commented Aug 8, 2014 at 5:36
I've never actually tried this before, but I'm pretty sure that you can't use .NET BinaryFormatter to deserialize an object that was serialized using Java. See stackoverflow.com/questions/17801967/… — vesan
– vesan, Commented Aug 8, 2014 at 5:36

kidshaw · Accepted Answer · 2014-08-08 05:50:38Z

2

Binary formatter places a header on the binary stream which represents a .NET type. You can not use that to send 'object' meaning to a non .net client.

Instead you will have to serialise to XML or Json and provide a local model and deserialisation in your client.

answered Aug 8, 2014 at 5:50

kidshaw

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