python stuck scoket Python基于stuck实现scoket文件传输

# -*- coding: UTF-8 -*-
import socket, time, socketserver, struct, os, _thread
 
host = '127.0.0.1'
port = 12307
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM) # 定义socket类型
s.bind((host, port)) # 绑定需要监听的Ip和端口号，tuple格式
s.listen(1)
 
 
def conn_thread(connection, address):
  while True:
    try:
      connection.settimeout(600)
      fileinfo_size = struct.calcsize('12sl')#12s表示12个字符，l表示一个长整型数
      buf = connection.recv(fileinfo_size)
      if buf: # 如果不加这个if，第一个文件传输完成后会自动走到下一句，需要拿到文件大小信息才可以继续执行
        filename, filesize = struct.unpack('12sl', buf)
        filename_f = filename.decode("utf-8").strip('\00') # C语言中'\0'是一个ASCII码为0的字符,在python中表示占一个位置得空字符
        filenewname = os.path.join('e:\\', os.path.basename(filename_f))
        print(u'文件名称:%s , 文件大小: %s' % (filenewname, filesize))
        recvd_size = 0 # 定义接收了的文件大小
        file = open(filenewname, 'wb')
        print(u"开始传输文件内容")
        while not recvd_size == filesize:
          if filesize - recvd_size > 1024:
            rdata = connection.recv(1024)
            recvd_size += len(rdata)
          else:
            rdata = connection.recv(filesize - recvd_size)
            recvd_size = filesize
          file.write(rdata)
        file.close()
        print('receive done')
        # connection.close()
    except socket.timeout:
      connection.close()
 
while True:
  print(u"开始进入监听状态")
  connection, address = s.accept()
  print('Connected by ', address)
  # thread = threading.Thread(target=conn_thread,args=(connection,address)) #使用threading也可以
  # thread.start()
  _thread.start_new_thread(conn_thread, (connection, address))
s.close()

# -*- coding: UTF-8 -*-
import socket, os, struct
 
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.connect(('127.0.0.1', 12307))
while True:
  filepath = input('请输入要传输的文件绝对路径:\r\n')
  print(type(filepath))
  print(len(filepath.encode("utf-8")))
  if os.path.isfile(filepath):
    #fileinfo_size = struct.calcsize('20sl') # 定义打包规则
    # 定义文件头信息，包含文件名和文件大小
    fhead = struct.pack('12sl', filepath.encode("utf-8"), os.stat(filepath).st_size)
    print(os.stat(filepath).st_size)
    s.send(fhead)
    print (u'文件路径: ', filepath)
    # with open(filepath,'rb') as fo: 这样发送文件有问题，发送完成后还会发一些东西过去
    fo = open(filepath, 'rb')
    while True:
      filedata = fo.read(1024)
      if not filedata:
        break
      s.send(filedata)
    fo.close()
    print (u'传输成功')
    # s.close()