import socket

count = 0
s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
server_addr = ('127.0.0.1',9999)
s.bind(server_addr)

print('Bind UDP on 9999...')
while True:
 if count == 0:
  data,client_addr = s.recvfrom(1024)
  print('connected from %s:%s'%client_addr)
  f = open(data, 'wb')
 data, client_addr = s.recvfrom(1024)
 if str(data) != "b'end'":
  f.write(data)
  print('recieved '+str(count)+' byte')
 else:
  break
 s.sendto('ok'.encode('utf-8'),client_addr)
 count+=1
print('recercled'+str(count))
f.close()
s.close()

 # data, addr = s.recvfrom(1024)
 # print('Received from %s:%s' %addr)
 # s.sendto(b'Hello, %s!' %data, addr)

import socket
import os
import time

def Get_FilePath_FileName_FileExt(filename):
 filepath, tempfilename = os.path.split(filename)
 shotname, extension = os.path.splitext(tempfilename)
 return filepath, shotname, extension

s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)

filename = input('please enter the filename you want to send:\n')
filepath, shotname, extension = Get_FilePath_FileName_FileExt(filename)

client_addr = ('127.0.0.1',9999)
f = open(filename,'rb')
count = 0
flag = 1
while True:
 if count == 0:
  data = bytes(shotname+extension, encoding = "utf8")
  start = time.time()
  s.sendto(data,client_addr)
 data = f.read(1024)
 if str(data) != "b''":
  s.sendto(data,client_addr)
  print(str(count)+'byte')

 else:
  s.sendto('end'.encode('utf-8'),client_addr)
  break
 data, server_addr = s.recvfrom(1024)
 count+=1
print('recircled'+str(count))
s.close
end = time.time()
print('cost'+str(round(end-start,2))+'s')
# for data in [b'Michael',b'Tracy',b'Sarah']:
#  s.sendto(data,('127.0.0.1',9999))
#  print(s.recv(1024).decode('utf-8'))
# s.close()