Description

This exercise will serve as the foundation for the upcoming programming projects. A sample working code is given to you in proj0.py. The program consists of server code and client code written as two separate threads.

(1) Understand the functionality implemented in the program. First, download, save and execute the program as is in your environment. Make sure it executes successfully and according to how you would expect.

Then attempt the changes suggested below. This project isn’t graded, but it will help subsequent projects if you try playing around with the program as follows.

(2) Try running the program immediately again when it finishes successfully. What do you see? Why? What happens when you remove the various sleep()s in the program?

(3) Separate the server code and client code into two different programs, server.py and client.py. Execute the server program first and then execute the client program. You should still get the same set of print messages as in the combined threaded code (proj0.py)

(4) In the given code, the server just sends a message string to the client after it connects. Modify the program so that the client sends a string to the server and then the server reverses the string and sends it back to the client. If the client sends “HELLO” to the server, the client should receive “OLLEH”. Your program should print the string sent by the client and the corresponding string received by the client. Your client program should be able to read a string (each line is a string) from a test file (say, in-proj0.txt). Similarly, the output of your program should be written to a file (say, out-proj0.txt).