dateserver.py

import socket
import threading
import os
from ftplib import FTP


class Server:
    def __init__(self):
        self.s = socket.socket(socket.AF_INET,socket.SOCK_STREAM)
        self.accept_connections()
        filename = 'input.txt'
        localfile = open(filename, 'wb')
        ftp.retrbinary('RETR ' + filename, localfile.write, 1024)
        ftp.quit()
        localfile.close()
    
    def accept_connections(self):
        ip = socket.gethostbyname(socket.gethostname())
        port = 8080

        self.s.bind((ip,port))
        self.s.listen(100)

        print('Running on IP: '+ip)
        print('Running on port: '+str(port))

        while 1:
            c, addr = self.s.accept()
            print(c)
            
            threading.Thread(target=self.handle_client,args=(c,addr,)).start()

    def handle_client(self,c,addr):
        data = c.recv(1024).decode()

        if not os.path.exists(data):
            c.send("file-doesn't-exist".encode())

        else:
            c.send("file-exists".encode())
            print('Sending back the response in ' + data)
            if data != '':
                file = open(data,'rb')
                data = file.read(1024)
                while data:
                    c.send(data)
                    data = file.read(1024)

                c.shutdown(socket.SHUT_RDWR)
                c.close()
                

server = Server()