xinted（eXtended InterNET daemon)即网络守护进程。xinetd能够同时监听多个指定的端口，在接受用户请求时，它能够根据用户请求的端口的不同，启动不同的网络服务进程来处理这些用户请求。
例子1，使用xinetd调用httpserver.py：
httpserver.py
#!/usr/bin/Python
import sys
request = ''
while True:
data= sys.stdin.readline().strip()
request = request + data + '<br>'
if data == '':
print 'HTTP/1.0 200 OK'
print ''
print '<html><body><p>' + request + '</p></body></html>'
sys.stdout.flush()
break
1.chmod u+x httpserver.py
2.在/etc/xinetd.d下创建httpserver(任意名字),进行设置：
vim /etc/xinetd.d/httpserver
service pythontestserver
{
disable = no
flags = REUSE
type = UNLISTED
port = 9991
protocol = tcp
socket_type = stream
wait = no
user = root
server = /soft/11.27/httpserver.py
server_args = /soft/11.27/httpserver.py
log_on_failure += USERID
3.重启xinet.d是配置生效
/etc/init.d/xinetd restart
4.这时查看9991端口（即上面设置的port = 9991）是否打开
[root@cai 11.27]# netstat -atnl|grep 9991
tcp 0 0 0.0.0.0:9991 0.0.0.0:*
5.打开:9991/，能看到数据
例子2，使用xinetd调用errorserver.py：
errorserver.py(注意：由于xinet.d设置了侦听51423端口，因此errorserver.py的s.bind((host,port))要注释掉，否则会报"address already in use"的错误)
#!/usr/bin/python
import socket,traceback,time,struct,sys
host = '192.168.220.2'
port = 51423
s=socket.socket(socket.AF_INET,socket.SOCK_STREAM)
s.setsockopt(socket.SOL_SOCKET,socket.SO_REUSEADDR,1)
#s.bind((host,port))
s.listen(1)
while True:
try:
message,address = s.accept()
except (KeyboardInterrupt, SystemExit):
raise
except:
traceback.print_exc()
continue
try:
#host = socket.gethostbyaddr(message)
print 'Got name %s from %s' % (host,message.getpeername())
#raise KeyboardInterrupt
#print 'Got connection from', message.getpeername()
except:
print 'cannot get name!'
try:
message.close()
except KeyboardInterrupt:
print 'Ctrl + C,exit!'
sys.exit(1)
except:
traceback.print_exc()
1.chmod u+x errorserver.py
2.在/etc/xinetd.d下创建pythontestserver(任意名字),进行设置：
vim /etc/xinetd.d/pythontestserver
service pythontestserver
{
disable = no
flags = REUSE
type = UNLISTED
port = 51423
protocol = tcp
socket_type = stream
wait = no
user = root
server = /soft/11.25/errorserver.py
server_args = /soft/11.25/errorserver.py
log_on_failure += USERID
3.重启xinet.d是配置生效
/etc/init.d/xinetd restart
4.这时查看51423端口（即上面设置的port = 51423）是否打开
[root@cai 11.25]# netstat -atnl|grep 51423
tcp 0 0 0.0.0.0:51423 0.0.0.0:* LISTEN
tcp 9 0 127.0.0.1:51423 127.0.0.1:53440 CLOSE_WAIT
tcp 0 0 127.0.0.1:51423 127.0.0.1:53442 ESTABLISHED
5.xinet.d配置好了，使用telnet连接51423端口。下面是运行结果
[root@cai ~]# telnet localhost 51423
Trying 127.0.0.1...
Connected to localhost.localdomain (127.0.0.1).
Escape character is '^]'.
《Python核心编程 第二版》.(Wesley J. Chun ).[高清PDF中文版]