what is python equivalent of getInputStream() and getOutputStream()?

Question

I have code written in Java, as I don't know java wanted to establish a socket connection using python but I'm unable to understand what is python equivalent of Java getInputStream() and getOutputStream() ? And how can we use it in python ? Following, you can find the code I already wrote in python.

  import socket
    try:
        resMsg = None
        myClient = None
        myClient = socket.socket(socket.AF_INET,socket.SOCK_STREAM)
        ip = socket.gethostbyname("usddcwvtrkjxts3")
        #print(ip)
        port = 3450

        address = (ip, port)
        myClient.connect(address)
        data = myClient.recv(1024)
        print(data)
    except:
        print("connection failed")

I have following code already written in Java:

        public String invoke(String requestMsg) {
            String resMsg = null;
            Socket myClient = null;
            DataInputStream input = null;
            PrintWriter output = null;
            try {
                try {
                    myClient = new Socket("vwddtrkjxts002", 3450);
                    input = new DataInputStream(myClient.getInputStream());
                    output = new java.io.PrintWriter(myClient.getOutputStream(), true);
                    output.println(requestMsg);
                    output.write("\u001A");
                    output.flush();
                    StringBuffer message = new StringBuffer();
                    try {
                        while (true) {
                            message.append((char) input.readByte());
                        }
                    } catch (EOFException e1) {
                    }

                    resMsg = message.toString();
                    System.out.println(resMsg);
                } catch (UnknownHostException e) {
                    e.printStackTrace();
                } catch (IOException e) {
                    e.printStackTrace();
                }

            } catch (Exception e) {
                e.printStackTrace();
            } finally {
                try {
                    output.close();
                    input.close();
                    myClient.close();

                } catch (IOException e) {
                    System.out.println(e);
                }
            }
            return resMsg;
        }

I'm able to establish a connection with python but unable to print anything as output.

Any suggestion will help ! Thank you in advance

To send data to the socket peer, use send() or sendall(). To receive data from the peer use recv(). — President James K. Polk
– President James K. Polk, Commented Jul 22, 2019 at 14:58

Anurag · Accepted Answer · 2019-07-22 07:05:55Z

1

I think listen() function is what you need.

Sample code:

import socket

HOST = '127.0.0.1'  # Standard loopback interface address (localhost)
PORT = 65432        # Port to listen on (non-privileged ports are > 1023)

with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as s:
    s.bind((HOST, PORT))
    s.listen()

This is how python socket work:

answered Jul 22, 2019 at 7:05

Anurag

4826 silver badges23 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

Gro · Accepted Answer · 2019-07-22 07:18:02Z

1

You can check a good tutorial here

In summary,

as client you initiate the connection, once established, you can use the socket object's recv() and send() methods to receive and send information
as server you bind to the port and start listening. Once the accept() method returns you have object on which you can call recv and send methods similar to client

answered Jul 22, 2019 at 7:18

Gro

1,6931 gold badge14 silver badges22 bronze badges

Collectives™ on Stack Overflow

what is python equivalent of getInputStream() and getOutputStream()?

2 Answers 2

Comments

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Related