added client side script

client/ChatConnection.py

@@ -0,0 +1,30 @@
+#!/usr/bin/env python3.7
+import socket
+
+
+class ChatConnection(object):
+    def __init__(self, host: str, port: int, buffSize=4096, encoding='utf8'):
+        self.soc = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
+        self.soc.connect((host, port))
+        self.buffSize = buffSize
+        self.encoding = encoding
+
+    def send(self, msg: str) -> None:
+        """
+        Wrapper method of socket.send and encode the message
+        to set character encoding.
+        """
+        self.soc.send(bytes(msg, self.encoding))
+
+    def recv(self) -> str:
+        """
+        Wrapper method of socket.recv and encode the message
+        to set character encoding.
+        """
+        return self.soc.recv(self.buffSize).decode(self.encoding)
+
+    def close(self) -> None:
+        """
+        Wrapper method to close the socket
+        """
+        self.soc.close()

client/ChatInterface.py

@@ -0,0 +1,94 @@
+#!/usr/bin/env python3.7
+import tkinter
+import threading
+from ChatConnection import ChatConnection
+
+
+class ChatInterface(object):
+    def __init__(self, connection: ChatConnection):
+        # set connection to use
+        self.connection = connection
+
+        # initialise tkinter window
+        self.window = tkinter.Tk()
+        self.window.title("Chatter")  # window title
+        # set method to trigger when window is close
+        self.window.protocol("WM_DELETE_WINDOW", self.close)
+        # end of window initialisation
+
+        # initialise message frame
+        self.messagesFrame = tkinter.Frame(self.window)
+        # # add scrollBar to see previously recovered messages
+        self.scrollBar = tkinter.Scrollbar(self.messagesFrame)
+        self.scrollBar.pack(side=tkinter.RIGHT, fill=tkinter.Y)
+        # # add messagesList to print recovered messages
+        self.messagesList = tkinter.Listbox(
+            self.messagesFrame, height=15, width=50, yscrollcommand=self.scrollBar.set)
+        self.messagesList.pack(side=tkinter.LEFT, fill=tkinter.BOTH)
+        self.messagesList.pack()
+        self.messagesFrame.pack()
+        # end of message frame initialisation
+
+        # initialise input
+        self.input = tkinter.StringVar()
+        self.input.set("Type your messages here.")
+        # # initialise input frame
+        self.inputFrame = tkinter.Entry(self.window, textvariable=self.input)
+        self.inputFrame.bind("<Return>", self.send)
+        self.inputFrame.pack()
+        # # initialise send button
+        self.sendButton = tkinter.Button(
+            self.window, text="Send", command=self.send)
+        self.sendButton.pack()
+        # end of input initialisation
+
+    def close(self, event=None) -> None:
+        """
+        Set input to ':quit' and trigger send method
+        """
+        self.input.set(":quit")
+        self.send()
+
+    def send(self, event=None) -> None:
+        """
+        Send message to connection
+        """
+        msg = self.input.get()
+        # check if input is quit command
+        if msg != ':quit':
+            # clear the input bar
+            self.input.set('')
+            # output the client message to message list
+            self.messagesList.insert(tkinter.END, '[YOU] {}'.format(msg))
+            # send the message to connection
+            self.connection.send(msg)
+        else:
+            # close the connection and window
+            self.connection.close()
+            self.window.quit()
+
+    def listener(self) -> None:
+        """
+        Listener method to keep receiving new message from
+        connection
+        """
+        while True:
+            try:
+                # receive messages from connection
+                msg = self.connection.recv()
+                # add recevied message to message list
+                self.messagesList.insert(tkinter.END, msg[:-1])
+            except OSError:
+                break
+
+    def start(self) -> None:
+        """
+        Start background listener and tkinter.mainloop
+        """
+        # initialise background listener as daemon thread
+        backgroundListener = threading.Thread(target=self.listener)
+        backgroundListener.daemon = True
+        backgroundListener.start()
+
+        # start tkinter main loop and open the GUI window
+        tkinter.mainloop()

client/__main__.py

@@ -0,0 +1,20 @@
+#!/usr/bin/env python3.7
+from ChatInterface import ChatInterface
+from ChatConnection import ChatConnection
+
+
+if __name__ == "__main__":
+    import argparse
+
+    parser = argparse.ArgumentParser()
+    parser.add_argument("host",
+                        metavar="HOST",
+                        help='Host IP to connect to.',
+                        type=str)
+    parser.add_argument("port",
+                        metavar="PORT",
+                        help='Host PORT to connect to.',
+                        type=int)
+    args = parser.parse_args()
+
+    ChatInterface(ChatConnection(args.host, args.port)).start()