Client.py

import argparse
import RDT
import time

if __name__ == '__main__':
    parser = argparse.ArgumentParser(description='Quotation client talking to a Pig Latin server.')
    parser.add_argument('server', help='Server.')
    parser.add_argument('port', help='Port.', type=int)
    args = parser.parse_args()
    
    msg_L = [
        'The use of COBOL cripples the mind; its teaching should, therefore, be regarded as a criminal offense. -- Edsgar Dijkstra',
        'C makes it easy to shoot yourself in the foot; C++ makes it harder, but when you do, it blows away your whole leg. -- Bjarne Stroustrup',
        'A mathematician is a device for turning coffee into theorems. -- Paul Erdos',
        'Grove giveth and Gates taketh away. -- Bob Metcalfe on the trend of hardware speedups not being able to keep up with software demands',
        'Wise men make proverbs, but fools repeat them. -- Samuel Palmer']
    
    timeout = 2  # send the next message if no response
    time_of_last_data = time.time()
    
    rdt = RDT.RDT('client', args.server, args.port)
    for msg_S in msg_L:
        print('Converting: ' + msg_S)
        rdt.rdt_1_0_send(msg_S)
        
        # receive message
        msg_S = None
        while msg_S is None:
            # try to receiver message before timeout
            try:
                msg_S = rdt.rdt_1_0_receive()
                if msg_S is None:
                    continue
            except RDT.RDTException as e:
                print(e)
                break
        
        # print the result
        if msg_S:
            print('to: ' + msg_S + '\n')
    
    rdt.disconnect()