1. The Client Server Model
By: Chelsea Bussey, Jeremy Walker, Justin Seldomridge, and Jeremy Shope

2. The Client Server Model
The client server model describes the distributed computing relationship between at least two independent computers (a client and server) which communicate through the internet or local area networks.
There can be multiple clients on each server.
Examples of using the client/ server include bank account transactions, chat rooms, and broadband routers.

3. What is a Client? Internet browsers Email Online chats
The client makes a service request.
Examples of clients include:
Internet browsers
Online chats

4. What is a Server? The server fulfills a client’s request
Specific types of servers include
Webservers
Application servers
Database servers
Mail servers
File servers
Terminal servers
FTP servers
Name servers
Print servers

5. Knowledge is Power It never hurts to learn a new language
Especially one that employers will like
We were all sort of familiar with C and C++ but no one was an expert

6. First Attempt: C

7. C code…… not that pretty

8. We wanted Visual C++ GUIs are nice and easy to make in Visual Studio
Code still ugly for C++ though
We were running out of time

9. PUNT! Python to the Rescue!
Python is very user friendly
Well known for rapid prototyping
You can make a program in no time!
Has great support
Amazingly easy socket handling
GUI development is very similar to Java Swing which we are already familiar with and LOVE

10. The Code (UML)

11. The Code (server) Server Uses UDP (User Datagram Protocol
ID Constants are sent with every datastream
Each ID tells the server what kind of data is being sent
The server registers a socket using a port and a hostname
The connection parameters are static.
These need to remain the same so the clients know how to connect to the server

12. The Code (Client) The client class extends the threading class
Threading is needed so that the clients can listen to the server while still updating the GUI
Clients connect to a server using the registered hostname and port
Any time data is sent to the server an ID constant is prepended to the data. This describes what is being sent.

13. The Code (GUI) wxPython Very similar to Java’s Swing
We used it to add a graphical Interface to our chat client
Open Source
Cross Platform
Very Dynamic , sizers allow the window to stretch while keeping the GUI components grouped
Allows Events to be bound to different widgets

14. Future Plans Make clients unique to the server
Login/logout system for clients
Basic chat room functionality - multiple clients who receive each other’s messages

15. Future Plans (cont.)
Advanced chat room functionality – multiple chatrooms, moderator users,