Conect Java client with Python server

Question

I made a server python with the next code (i think the rest of the code isn't necessary):

while 1:
    data = conn.recv(BUFFER_SIZE)
    if not data: break
    print "received data:", data
    conn.send(data+'\r\n')

conn.close()

and when i try to received the echo with a Java client, i get a strange message when printing on console:

Mensaje recibido = java.io.DataInputStream@1cf2a0ef

At server point, I'm receiving good the message: Hola Mundo.

The code in Java is:

    DataInputStream ims;
    String data;

    s = new Socket(HOST,PORT);

    oms = new DataOutputStream(s.getOutputStream());
    ims = new DataInputStream(s.getInputStream());

    oms.writeUTF(ms);
    ims.read();
    data = ims.toString();

    oms.close();
    ims.close();
    s.close();

    return data;

I think that ims.toString() is probably wrong.

JP Moresmau · Accepted Answer · 2015-04-23 16:18:10Z

1

What you need is to assign data to a string read from the stream:

data=ims.readUTF();

the toString() method in the stream just returns a representation of the object id, it's meaningless.

See http://docs.oracle.com/javase/7/docs/api/java/io/DataInputStream.html#readUTF()

answered Apr 23, 2015 at 16:18

JP Moresmau

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Comments

fdsa · Accepted Answer · 2015-04-23 16:18:18Z

1

You are correct that ims.toString is wrong. If python is sending a UTF-8 string you could use ims.readUTF().

answered Apr 23, 2015 at 16:18

fdsa

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2 Comments

Josete Manu Over a year ago

I thought that readUTF() don't return the string, i didn't read the documentation of Java, thank you!

Josete Manu Over a year ago

It's working, i don't need more help at the moment hahaha thanks!

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