Python Simple server program

This is an exercise in the Python Core programming (second edition of the article), which asks the server to recognize the following commands:

LS returns the current directory of the server program

OS returns information about the server's operating system

Date gets the current time of the server

LS dir returns the directory dir file list

Server program:

1 Import Time2 ImportOS3 Importdatetime4 5host="'6port=212347Addr=(Host,port)8bufsize=80969 Tensersock=Socket.socket (Socket.af_inet,socket. SOCK_STREAM) OneSersock.setsockopt (socket. Sol_socket,socket. so_reuseaddr,1) A Sersock.bind (ADDR) -Sersock.listen (5) -  the defprocess_cmd (cmd): -     Print "The command receive from client is:%s"%cmd -     ifcmd=='ls': -Curdir=Os.curdir +res=Os.listdir (CurDir) -     elifcmd=='OS': +res=Os.uname () A     elifCmd.startswith ('ls'): atLength=Len (Cmd.split ()) -         ifLength==1: -res="command is illegal" -         eliflength==2: -Reqdir=cmd.split () [1] -             Try: inres=Os.listdir (Reqdir) -             exceptoserror,e: tores=e +         Else: -res="argument is illegal" the     elifcmd=='Date': *res=Datetime.date.today () $     Else:Panax Notoginsengres='command is illegal' -     PrintRes the     returnStr (RES) +  whileTrue: AClisock,addr=sersock.accept () the     Print "... connected from%s:%s"%Addr +      whileTrue: -Cmd=clisock.recv (BUFSIZE) $         if  notcmd: $              Break -         Else: -res=process_cmd (cmd) the clisock.send (RES) - clisock.close ()WuyiSersock.close ()

Client program:

1 #!/usr/bin/python2 3 ImportSocket4 5host='localhost'6port=212347Addr=(Host,port)8bufsiz=80969 Tenclisock=Socket.socket (Socket.af_inet,socket. SOCK_STREAM) One Clisock.connect (ADDR) A Print "Please input below command." - Print "*************************************" - Print "date ls/ls dir os" the Print "*************************************" -  whileTrue: -Cmd=raw_input (">") -     if  notcmd: +         Continue - clisock.send (cmd) +res=clisock.recv (Bufsiz) A     if  notRes: at         Print "response from server error." -     PrintRes -  -Clisock.close ()

Execution Result:

Please input below command.*************************************Date   ls/ls dirOS>Date -- .- the>ls['client_select.py','client.py','server_select.py','chat_server_v1.py','server.py','daytimeclient.py','chat_client_v1.py','chat_server_v2.py','tstserv.py','tstclnt.py']>ls/home['Tmyyss']>OS ('Linux','Ubuntu','3.13.0-53-generic','#89-ubuntu SMP Wed may 10:34:28 UTC','i686')>>>>>Exitcommand is illegal>>>Qcommand is illegal

Python Simple server program