python单线程文件传输的实例(C/S)

客户端代码：

#-*-encoding:utf-8-*-
 
import socket
import os
import sys
import math
import time
 
def progressbar(cur, total):
 percent = '{:.2%}'.format(float(cur) / float(total))
 sys.stdout.write('\r')
 sys.stdout.write("[%-50s] %s" % (
       '=' * int(math.floor(cur * 50 / total)),
       percent))
 sys.stdout.flush()
 
def getfilesize(file):
 file.seek(0, os.seek_end)
 filelength = file.tell()
 file.seek(0, 0)
 return filelength
 
def getfilename(filefullpath):
 index = filefullpath.rindex('\\')
 if index == -1:
  return filefullpath 
 else:
  return filefullpath[index+1:]
 
def transferfile():
 filefullpath = r"%s" % raw_input("file path: ").strip("\"")
 if os.path.exists(filefullpath):
  timestart = time.clock()
  file = open(filefullpath, 'rb')
  filesize = getfilesize(file)
  client = socket.socket(socket.af_inet, socket.sock_stream)
  client.connect((targethost, targetport))
  # send file size
  client.send(str(filesize))
  response = client.recv(1024)
  # send file name
  client.send(getfilename(filefullpath))
  response = client.recv(1024)
  # send file content
  sentlength = 0
  while sentlength < filesize:
   buflen = 1024
   buf = file.read(buflen)
   client.send(buf)
   sentlength += len(buf)
   process = int(float(sentlength) / float(filesize) * 100)
   progressbar(process, 100)
  client.recv(1024)
  file.close()
  timeend = time.clock()
  print "\r\nfinished, spent %d seconds" % (timeend - timestart)
 else:
  print "file doesn't exist"
 
targethost = raw_input("server ip address: ")
targetport = int(raw_input("server port: "))
 
while true:
 transferfile()

服务器端代码：

#-*-encoding:utf-8-*-
 
import socket
import threading
import os
import sys
import math
 
bindip = "0.0.0.0"
bindport = 9999
 
server = socket.socket(socket.af_inet, socket.sock_stream)
server.bind((bindip, bindport))
server.listen(1)
print "listening on %s:%d" % (bindip, bindport)
 
def progressbar(cur, total):
 percent = '{:.2%}'.format(float(cur) / float(total))
 sys.stdout.write('\r')
 sys.stdout.write("[%-50s] %s" % (
       '=' * int(math.floor(cur * 50 / total)),
       percent))
 sys.stdout.flush()
 
def checkfilename(originalfilename):
 extensionindex = originalfilename.rindex(".")
 name = originalfilename[:extensionindex]
 extension = originalfilename[extensionindex+1:]
 
 index = 1
 newnamesuffix = "(" + str(index) + ")"
 finalfilename = originalfilename
 if os.path.exists(finalfilename):
  finalfilename = name + " " + newnamesuffix + "." + extension
 while os.path.exists(finalfilename):
  index += 1
  oldsuffix = newnamesuffix
  newnamesuffix = "(" + str(index) + ")"
  finalfilename = finalfilename.replace(oldsuffix, newnamesuffix)
 return finalfilename
 
def handleclient(clientsocket):
 # receive file size
 filesize = int(clientsocket.recv(1024))
 # print "[<==] file size received from client: %d" % filesize
 clientsocket.send("received")
 # receive file name
 filename = clientsocket.recv(1024)
 # print "[<==] file name received from client: %s" % filename
 clientsocket.send("received")
 filename = checkfilename(filename)
 file = open(filename, 'wb')
 # receive file content
 print "[==>] saving file to %s" % filename
 receivedlength = 0
 while receivedlength < filesize:
  buflen = 1024
  if filesize - receivedlength < buflen:
   buflen = filesize - receivedlength
  buf = clientsocket.recv(buflen)
  file.write(buf)
  receivedlength += len(buf)
  process = int(float(receivedlength) / float(filesize) * 100)
  progressbar(process, 100)
 
 file.close()
 print "\r\n[==>] file %s saved." % filename
 clientsocket.send("received")
 
while true:
 client, addr = server.accept()
 print "[*] accepted connection from: %s:%d" % (addr[0], addr[1])
 
 clienthandler = threading.thread(target=handleclient, args=(client,))
 clienthandler.start()

运行结果示例：

服务器端：

客户端（服务器端做了端口映射：59999->9999）：

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