Seperate client and server of FTP (#1106)

* added sample file to transfer

* split client and server into separate files

* client and server now work in python2

* server works on python3

* client works on python3

* allow configurable ONE_CONNECTION_ONLY for testing server

* allow testing of ftp server + client

* use f-strings

* removed single letter vars

* fixed bad quote marks

* clearer file handler names

* 'with open() as' syntax

* unicode and emojis in the test data

* s -> sock

* consistent comment spacing

* remove closing formalities

* swap in and out_file

* f-string

* if __name__ == '__main__':

file_transfer_protocol/client.py

@@ -0,0 +1,23 @@
+if __name__ == '__main__':
+    import socket  # Import socket module
+
+    sock = socket.socket()  # Create a socket object
+    host = socket.gethostname()  # Get local machine name
+    port = 12312
+
+    sock.connect((host, port))
+    sock.send(b'Hello server!')
+
+    with open('Received_file', 'wb') as out_file:
+        print('File opened')
+        print('Receiving data...')
+        while True:
+            data = sock.recv(1024)
+            print(f"data={data}")
+            if not data:
+                break
+            out_file.write(data)  # Write data to a file
+
+    print('Successfully got the file')
+    sock.close()
+    print('Connection closed')