目录

* 一、基于TCP协议 <https://www.cnblogs.com/nickchen121/p/11032290.html#一基于tcp协议>
* 1.1 server类 <https://www.cnblogs.com/nickchen121/p/11032290.html#server类>
* 1.2 request类 <https://www.cnblogs.com/nickchen121/p/11032290.html#request类>
* 1.3 继承关系 <https://www.cnblogs.com/nickchen121/p/11032290.html#继承关系>
* 1.4 服务端 <https://www.cnblogs.com/nickchen121/p/11032290.html#服务端>
* 1.5 客户端 <https://www.cnblogs.com/nickchen121/p/11032290.html#客户端>
* 1.6 客户端1 <https://www.cnblogs.com/nickchen121/p/11032290.html#客户端1>
* 二、基于UDP协议 <https://www.cnblogs.com/nickchen121/p/11032290.html#二基于udp协议>
* 2.1 服务端 <https://www.cnblogs.com/nickchen121/p/11032290.html#服务端-1>
* 2.2 客户端 <https://www.cnblogs.com/nickchen121/p/11032290.html#客户端-1>
* 2.3 客户端1 <https://www.cnblogs.com/nickchen121/p/11032290.html#客户端1-1>
* 三、socketserver源码分析
<https://www.cnblogs.com/nickchen121/p/11032290.html#三socketserver源码分析>
* 3.1 源码总结 <https://www.cnblogs.com/nickchen121/p/11032290.html#源码总结>
一、基于TCP协议

基于tcp的套接字,关键就是两个循环,一个链接循环,一个通信循环

socketserver模块中分两大类:server类(解决链接问题)和request类(解决通信问题)

1.1 server类



1.2 request类



1.3 继承关系







1.4 服务端
import socketserver class MyHandler(socketserver.BaseRequestHandler): def
handle(self): # 通信循环 while True: # print(self.client_address) #
print(self.request) #self.request=conn try: data = self.request.recv(1024) if
len(data) == 0: break self.request.send(data.upper()) except
ConnectionResetError: break if __name__ == '__main__': s =
socketserver.ThreadingTCPServer(('127.0.0.1', 8080), MyHandler,
bind_and_activate=True) s.serve_forever() # 代表连接循环 #
循环建立连接,每建立一个连接就会启动一个线程(服务员)+调用Myhanlder类产生一个对象,调用该对象下的handle方法,专门与刚刚建立好的连接做通信循环
1.5 客户端
import socket phone = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
phone.connect(('127.0.0.1', 8080)) # 指定服务端ip和端口 while True: # msg=input('>>:
').strip() #msg='' msg = 'client33333' # msg='' if len(msg) == 0: continue
phone.send(msg.encode('utf-8')) data = phone.recv(1024) print(data)
phone.close()
1.6 客户端1
import socket phone = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
phone.connect(('127.0.0.1', 8080)) # 指定服务端ip和端口 while True: # msg=input('>>:
').strip() #msg='' msg = 'client11111' # msg='' if len(msg) == 0: continue
phone.send(msg.encode('utf-8')) data = phone.recv(1024) print(data)
phone.close()
二、基于UDP协议

2.1 服务端
import socketserver class MyHandler(socketserver.BaseRequestHandler): def
handle(self): # 通信循环 print(self.client_address) print(self.request) data =
self.request[0] print('客户消息', data) self.request[1].sendto(data.upper(),
self.client_address) if __name__ == '__main__': s =
socketserver.ThreadingUDPServer(('127.0.0.1', 8080), MyHandler)
s.serve_forever()
2.2 客户端
import socket client = socket.socket(socket.AF_INET, socket.SOCK_DGRAM) #
数据报协议-》udp while True: # msg=input('>>: ').strip() #msg='' msg = 'client1111'
client.sendto(msg.encode('utf-8'), ('127.0.0.1', 8080)) data, server_addr =
client.recvfrom(1024) print(data) client.close()
2.3 客户端1
import socket client = socket.socket(socket.AF_INET, socket.SOCK_DGRAM) #
数据报协议-》udp while True: # msg=input('>>: ').strip() #msg='' msg = 'client2222'
client.sendto(msg.encode('utf-8'), ('127.0.0.1', 8080)) data, server_addr =
client.recvfrom(1024) print(data) client.close()
三、socketserver源码分析
ftpserver=socketserver.ThreadingTCPServer(('127.0.0.1', 8080),FtpServer)
ftpserver.serve_forever()
*
查找属性的顺序:ThreadingTCPServer->ThreadingMixIn->TCPServer->BaseServer

*

实例化得到ftpserver,先找类ThreadingTCPServer的__init__,在TCPServer中找到,进而执行server_bind,server_active

*

找ftpserver下的serve_forever,在BaseServer中找到,进而执行self._handle_request_noblock(),该方法同样是在BaseServer中

*
执行self._handle_request_noblock()进而执行request, client_address =
self.get_request()(就是TCPServer中的self.socket.accept()),然后执行self.process_request(request,
client_address)

*

在ThreadingMixIn中找到process_request,开启多线程应对并发,进而执行process_request_thread,执行self.finish_request(request,
client_address)

*

上述四部分完成了链接循环,本部分开始进入处理通讯部分,在BaseServer中找到finish_request,触发我们自己定义的类的实例化,去找__init__方法,而我们自己定义的类没有该方法,则去它的父类也就是BaseRequestHandler中找....

3.1 源码总结

*
基于tcp的socketserver我们自己定义的类中的

*
self.server即套接字对象

* self.request即一个链接
  
*
self.client_address即客户端地址

*
基于udp的socketserver我们自己定义的类中的

* self.request是一个元组(第一个元素是客户端发来的数据,第二部分是服务端的udp套接字对象),如(b'adsf',
<socket.socket fd=200, family=AddressFamily.AF_INET,
type=SocketKind.SOCK_DGRAM, proto=0, laddr=('127.0.0.1', 8080)>)
  
* self.client_address即客户端地址

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