Python初体验 —— 一个简单的socket echo server

   接触Python没多久，发觉Python的语法真得很简洁，Python的标准库已经很完善了，第三方库更是多不胜数，对Python了解越深入就越被它吸引。

    以下是闲时写的一个简单的Socket服务端，采用了“一个连接对应一个线程”的模型，服务端的功能只是简单的echo客户端发过来的数据。

echo_server_mt.py

#!/usr/bin/pythonfrom socket import *import threadimport timeport = 29982flags={"running": True}def client_proc(s, addr): try: print "/t",addr," connected" while flags["running"]: data=s.recv(4096) if data: print "--->receive data from", addr,time.ctime() print data s.send(data) else: break if data == '[stop_server]': flags["running"] = False except error, e: print addr, " socket error:", e except Exception, e: print addr, " error:", e except: print addr," unknown error!" print "/t", addr, " closed" cli.close()ss=socket(AF_INET, SOCK_STREAM)ss.bind(('',port))ss.listen(5)ss.settimeout(2)while flags["running"]: try: cli, addr = ss.accept() cli.setblocking(True) thread.start_new(client_proc, (cli,addr)) except timeout: continue except error, e: print "socket error:", e flags["running"] = Falsess.close()

 

客户端代码：

echo_client.py

#!/usr/bin/pythonfrom socket import *import timeimport threadport = 29982flags={"connected": True}ss=socket(AF_INET, SOCK_STREAM)ss.connect(('localhost', port))def recv_proc(): while flags["connected"]: rv=ss.recv(655536) if not rv: flags["connected"] = False break print "------------receive from server:--------------" print rvthread.start_new(recv_proc, ())while flags["connected"]: dat=raw_input("entere data to be sent, type 'exit' to exit:/n") if dat == 'exit': break ss.send(dat) time.sleep(0.5)ss.close()print "socket close! program will close in 3 seconds"time.sleep(3)