本文介紹Python實現端口復用實例如下所示：

#coding=utf-8import socketimport sysimport selectimport threadinghost='192.168.99.100'port=80class Thread(threading.Thread):  def __init__(self,buf,sockfd):    threading.Thread.__init__(self)    self.buf=buf    self.sockfd=sockfd  def run(self):   if len(self.buf)!=0:    if 'GET' in self.buf :  #判斷是否是瀏覽器提交的數據如果是則將提交的數據轉發至本地環回地址的80端口     s2=socket.socket(socket.AF_INET,socket.SOCK_STREAM)     s2.connect(('127.0.0.1',80))     s2.send(self.buf)     bufer=''     while 1:      recv_data=s2.recv(1024)      bufer+=recv_data      if len(recv_data)==0:       break     print bufer,len(bufer)     if len(bufer)==0:      pass          self.sockfd.send(bufer)  #將服務器發送的數據發回客戶端     s2.close     self.sockfd.close     sys.exit()    else:     'ps:connect to ssh' #如果數據不是瀏覽器提交則將其轉發至本地的22端口     s2=socket.socket(socket.AF_INET,socket.SOCK_STREAM)     s2.connect(('127.0.0.1',22))     s2.send(self.buf)     recv_data=s2.recv(4096)     conn.send(recv_data)     self.sockfd.close     s2.closes=socket.socket(socket.AF_INET,socket.SOCK_STREAM)s.setsockopt( socket.SOL_SOCKET, socket.SO_REUSEADDR, 1 ) #端口復用的關鍵點s.bind((host,port))s.listen(10)while 1: infds,outfds,errfds=select.select([s,],[],[],5) #使用select函數進行非阻塞操作 if len(infds)!=0:  conn,(addr,port)=s.accept()  print 'connected by',addr,port  data=conn.recv(1024)  t=Thread(data,conn)  t.start()s.close#coding=utf-8import socketimport sysimport selectimport threadinghost='192.168.99.100'port=80class Thread(threading.Thread):  def __init__(self,buf,sockfd):    threading.Thread.__init__(self)    self.buf=buf    self.sockfd=sockfd  def run(self):   if len(self.buf)!=0:    if 'GET' in self.buf :  #判斷是否是瀏覽器提交的數據如果是則將提交的數據轉發至本地環回地址的80端口     s2=socket.socket(socket.AF_INET,socket.SOCK_STREAM)     s2.connect(('127.0.0.1',80))     s2.send(self.buf)     bufer=''     while 1:      recv_data=s2.recv(1024)      bufer+=recv_data      if len(recv_data)==0:       break     print bufer,len(bufer)     if len(bufer)==0:      pass          self.sockfd.send(bufer)  #將服務器發送的數據發回客戶端     s2.close     self.sockfd.close     sys.exit()    else:     'ps:connect to ssh' #如果數據不是瀏覽器提交則將其轉發至本地的22端口     s2=socket.socket(socket.AF_INET,socket.SOCK_STREAM)     s2.connect(('127.0.0.1',22))     s2.send(self.buf)     recv_data=s2.recv(4096)     conn.send(recv_data)     self.sockfd.close     s2.closes=socket.socket(socket.AF_INET,socket.SOCK_STREAM)s.setsockopt( socket.SOL_SOCKET, socket.SO_REUSEADDR, 1 ) #端口復用的關鍵點s.bind((host,port))s.listen(10)while 1: infds,outfds,errfds=select.select([s,],[],[],5) #使用select函數進行非阻塞操作 if len(infds)!=0:  conn,(addr,port)=s.accept()  print 'connected by',addr,port  data=conn.recv(1024)  t=Thread(data,conn)  t.start()s.close