Python Socket多线程并发原理及实现

import SocketServer      #导入SocketServer，多线程并发由此类实现
 
class MySockServer(SocketServer.BaseRequestHandler):  #定义一个类
 
  def handle(self):   #handle(self)方法是必须要定义的，可以看上面的说明
    print \'Got a new connection from\', self.client_address
    while True:
      data = self.request.recv(1024)  #需要通过self的方法调用数据接收函数
      if not data:break
      print \'recv:\', data
 
      self.request.send(data.upper())  #需要通过self的方法调用数据接收函数
 
if __name__ == \'__main__\':  #并非一定要用这样的方式，只是建议这样使用
  HOST = \'\'       #定义侦听本地地址口（多个IP地址情况下），这里表示侦听所有
  PORT = 50007     #Server端开放的服务端口
  s = SocketServer.ThreadingTCPServer((HOST, PORT), MySockServer)
               #调用SocketServer模块的多线程并发函数
  s.serve_forever()   #持续接受客户端的连接

import socket
 
HOST = \'192.168.1.13\'
PORT = 50007
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.connect((HOST, PORT))
 
while True:
  user_input = raw_input(\'msg to send:\').strip()
  s.sendall(user_input)
  data = s.recv(1024)
  print \'Received\', repr(data)
 
s.close()

import socketserver
import struct
import json
import os
class FtpServer(socketserver.BaseRequestHandler):
  coding=\'utf-8\'
  server_dir=\'file_upload\'
  max_packet_size=1024
  BASE_DIR=os.path.dirname(os.path.abspath(__file__))
  def handle(self):
    print(self.request)
    while True:
      data=self.request.recv(4)
      data_len=struct.unpack(\'i\',data)[0]
      head_json=self.request.recv(data_len).decode(self.coding)
      head_dic=json.loads(head_json)
      # print(head_dic)
      cmd=head_dic[\'cmd\']
      if hasattr(self,cmd):
        func=getattr(self,cmd)
        func(head_dic)
  def put(self,args):
    file_path = os.path.normpath(os.path.join(
      self.BASE_DIR,
      self.server_dir,
      args[\'filename\']
    ))

    filesize = args[\'filesize\']
    recv_size = 0
    print(\'----->\', file_path)
    with open(file_path, \'wb\') as f:
      while recv_size < filesize:
        recv_data = self.request.recv(self.max_packet_size)
        f.write(recv_data)
        recv_size += len(recv_data)
        print(\'recvsize:%s filesize:%s\' % (recv_size, filesize))


ftpserver=socketserver.ThreadingTCPServer((\'127.0.0.1\',8080),FtpServer)
ftpserver.serve_forever()

import socket
import struct
import json
import os



class MYTCPClient:
  address_family = socket.AF_INET

  socket_type = socket.SOCK_STREAM

  allow_reuse_address = False

  max_packet_size = 8192

  coding=\'utf-8\'

  request_queue_size = 5

  def __init__(self, server_address, connect=True):
    self.server_address=server_address
    self.socket = socket.socket(self.address_family,
                  self.socket_type)
    if connect:
      try:
        self.client_connect()
      except:
        self.client_close()
        raise

  def client_connect(self):
    self.socket.connect(self.server_address)

  def client_close(self):
    self.socket.close()

  def run(self):
    while True:
      inp=input(\">>: \").strip()
      if not inp:continue
      l=inp.split()
      cmd=l[0]
      if hasattr(self,cmd):
        func=getattr(self,cmd)
        func(l)


  def put(self,args):
    cmd=args[0]
    filename=args[1]
    if not os.path.isfile(filename):
      print(\'file:%s is not exists\' %filename)
      return
    else:
      filesize=os.path.getsize(filename)

    head_dic={\'cmd\':cmd,\'filename\':os.path.basename(filename),\'filesize\':filesize}
    print(head_dic)
    head_json=json.dumps(head_dic)
    head_json_bytes=bytes(head_json,encoding=self.coding)

    head_struct=struct.pack(\'i\',len(head_json_bytes))
    self.socket.send(head_struct)
    self.socket.send(head_json_bytes)
    send_size=0
    with open(filename,\'rb\') as f:
      for line in f:
        self.socket.send(line)
        send_size+=len(line)
        print(send_size)
      else:
        print(\'upload successful\')




client=MYTCPClient((\'127.0.0.1\',8080))

client.run()