发布于 2015-09-23 20:57:15 | 129 次阅读 | 评论: 0 | 来源: 网友投递
这里有新鲜出炉的Python3 官方中文指南，程序狗速度看过来！
Python编程语言
Python 是一种面向对象、解释型计算机程序设计语言，由Guido van Rossum于1989年底发明，第一个公开发行版发行于1991年。Python语法简洁而清晰，具有丰富和强大的类库。它常被昵称为胶水语言，它能够把用其他语言制作的各种模块（尤其是C/C++）很轻松地联结在一起。
本文实例讲述了Python实现简单的代理服务器。分享给大家供大家参考。具体如下：
具备简单的管理功能，运行后 telnet localhost 9000 端口可以进行管理主要功能就是做包转发，如果有一个桥服务器，可以用来外网访问内网用，还是很管用的
#/bin/env python
#coding:utf-8
import socket,select,sys,time
import thread
s_list = []
def loop(cs,addr,s_ip,s_port):
print '%s %d connected.' % addr
ts = socket.socket()
try:
ts.connect((s_ip,s_port))
except:
cs.close()
print '%s %d closed.' % addr
sys.exit(0)
while True:
rl,wl,xl = select.select([cs.fileno(),ts.fileno()],[],[cs.fileno(),ts.fileno()])
if len(xl) > 0:
cs.close()
ts.close()
print '%s %d closed.' % addr
sys.exit(0)
if len(rl) > 0:
if rl[0] == cs.fileno():
rs = ts
ws = cs
else:
rs = cs
ws = ts
try:
buffer = ws.recv(10000)
if len(buffer) == 0:
raise
rs.send(buffer)
except:
rs.close()
ts.close()
print '%s %d closed.' % addr
sys.exit(0)
def mainserver(l_port,s_ip,s_port):
global s_list
try:
ss = socket.socket()
ss.bind(('0.0.0.0',l_port))
ss.listen(10)
s_list.append((l_port,s_ip,s_port))
except:
sys.exit(0)
while True:
cs,addr = ss.accept()
thread.start_new_thread(loop,(cs,addr,s_ip,s_port))
def manager(l_port):
global start,s_list
ss = socket.socket()
ss.bind(('0.0.0.0',l_port))
ss.listen(10)
while True:
cs,addr = ss.accept()
cs.send("""trans server 1.0rntype 'help' to get helprn""")
buffer = ''
while True:
buf = cs.recv(10000)
if len(buf) == 0:
cs.close()
break
if buf[-1] not in ('r','n'):
buffer += buf
continue
buffer += buf
cmd = buffer.strip()
buffer = ''
if cmd == 'exit':
cs.close()
break
elif cmd == 'stop':
start = 0
cs.close()
sys.exit(0)
elif cmd == 'list':
b = ''
for l in s_list:
b += '%4d %s:%drn' % l
if len(b) > 0:
cs.send(b)
elif cmd in ('help','?'):
cs.send("""-------------------------------------------r
exitr
exit telnetr
start localport serverip:serverportr
start a new serverr
listr
list all serverr
-------------------------------------------r
""")
else:
cmds = cmd.split(" ",1)
if len(cmds) > 1 and cmds[0] == 'start':
args = cmds[1].strip().split(" ",1)
if len(args) != 2:
cs.send('start localport serverip:serverportrn')
continue
arg = args[1].split(":",1)
if len(arg) != 2:
cs.send('start localport serverip:serverportrn')
continue
try:
l_port = int(args[0])
s_ip = arg[0]
s_port = int(arg[1])
except:
cs.send('start localport serverip:serverportrn')
continue
thread.start_new_thread(mainserver,(l_port,s_ip,s_port))
cs.send('start OK!rn')
else:
cs.send('no command [%s]rn' % cmd)
continue
def main():
global start
if len(sys.argv) == 3:
try:
l_port = int(sys.argv[1])
s_ip,s_port = sys.argv[2].split(":")
s_port = int(s_port)
thread.start_new_thread(mainserver,(l_port,s_ip,s_port))
except:
pass
start = 1
thread.start_new_thread(manager,(9000,))
while start:
time.sleep(1)
if __name__ == '__main__':
start = 0
main()