server_improved.py

import socket

serversocket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)

host = socket.gethostname()
port = 6969

serversocket.bind((host, port))

serversocket.listen(1)

clientsocket, addr = serversocket.accept()
clientsocket.send(b"Connection Succesful.")

customCommands = ["download()", "upload()"]

print("Connection Succesful.\n")
print("\n\n=====CLIENT TERMINAL=====\n\n")

while True:
	cwd = "NOT A DIRECTORY"

	while cwd == "NOT A DIRECTORY":
		cwd = clientsocket.recv(1024).decode("utf-8")

	command = input("(" + addr[0] + ":" + str(addr[1]) + ") " + cwd + "~$")

	if command == "quit()":
		clientsocket.send(b"quit()")
		clientsocket.close()
		break
	elif command == "":
		clientsocket.send(b"RESPOND NULL")
	elif "copy()" in command:
		fileName = command.split(".copy()")
		copyFile = open(fileName[0], "ab")
		clientsocket.send(command.encode("utf-8"))

		while True:
			filePart = clientsocket.recv(1024)
			if filePart == b"EOF":
				copyFile.close()
				break
			copyFile.write(filePart)
	else:
		clientsocket.send(command.encode("utf-8"))
		output = clientsocket.recv(1024).decode("utf-8")
		if output != "COMMAND EXCPETION.":
			print(output)