Python Socket File Transfer

I have a RPi which I intented to use it to crawl data. The development environment in RPi is very bad, so I did my programing in PC. This lead to an issue that I need to transfer the distribution from my PC to RPi. I does not want to use thumbdrive as the RPi will not be located near my PC. So I wrote an application to transfer file from my PC to RPi.

server is the receiver and client is the transmitter.
I also take care of if the file in a subdirectory.

server

import socket
import os

print('Waiting for clinet to connect...')
c = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
c.bind(('', 1234))
c.listen(1)
s, a = c.accept()

print('Connected. Going to receive file.')
s.sendall('getfilename')
filename = s.recv(1024)
if '/' in filename:
    dir = os.path.dirname(filename)
    try:
        os.stat(dir)
    except:
        print('Directory does not exist. Creating directory.')
        os.mkdir(dir)
f = open(filename, 'wb')
print('Filename: ' + filename)

while True:
    s.sendall('getfile')
    size = int(s.recv(16))
    print('Total size: ' + str(size))
    recvd = ''
    while size > len(recvd):
        data = s.recv(1024)
        if not data:
            break
        recvd += data
        f.write(data)
        #print(len(recvd))
    break
s.sendall('end')
print('File received.')

s.close()
c.close()
f.close()

client

import socket
import sys

if len(sys.argv) > 1 :
    print('Trying to connect...')
    s = socket.socket()
    s.connect(('127.0.0.1', 1234))

    print('Connected. Wating for command.')
    while True:
        cmd = s.recv(32)

        if cmd == 'getfilename':
            print('"getfilename" command received.')
            s.sendall(sys.argv[1])

        if cmd == 'getfile':
            print('"getfile" command received. Going to send file.')
            with open(sys.argv[1], 'rb') as f:
                data = f.read()
            s.sendall('%16d' % len(data))
            s.sendall(data)
            print('File transmission done.')

        if cmd == 'end':
            print('"end" command received. Teminate.')
            break