How to open a Port on Server

Question

I am new to opening a port and server side programming. And I am trying to open a port on my server in python and then form an iOS app get some data from that port. I have done some research and know I can open a port like this

import socket               # Import socket module

s = socket.socket()         # Create a socket object
host = socket.gethostname() # Get local machine name
port = 12345                # Reserve a port for your service.
s.bind((host, port))        # Bind to the port

s.listen(5)                 # Now wait for client connection.
while True:
   c, addr = s.accept()     # Establish connection with client.
   print 'Got connection from', addr
   c.send('Thank you for connecting')
   c.close()                # Close the connection

But my question is lets say I just wanted to retrieve a simple string from this port how do I add that string to this open port, I have found some ways to get data from the port in iOS like this library https://github.com/armadsen/ORSSerialPort but how do I put the data like a string on the open port?

Thanks for the help in advance.

Answer 1

When you call the method s.accept() it will return the socket object as the first return. You can call socket.rescv method to read data -

data = c.recv(1024)

But do remember this is a blocking call. For more information, you can read this post.