我读到这个:
您可以使用 xinetd 添加启动您的 python 脚本的服务。标准输入和输出将通过网络在所需端口上传输,因此您无需修改脚本(输入/原始输入和打印方法可以正常工作)。
因此,当与 192.168.240.37:65123 建立 TCP 连接时,我使用自定义 xinet 服务来启动 script.py。行为不符合预期/预期。
/root/script.py
#! /usr/bin/python
my_name = raw_input("Enter your name: ")
print my_name
quit()
/etc/xinetd.d/netunique-server
service netunique
{
disable = no
id = netunique-server
type = unlisted
wait = no
socket_type = stream
protocol = tcp
user = root
server = /usr/bin/python
server_args = /root/script.py
port = 65123
flags = IPv4 REUSE
bind = 192.168.240.37
}
systemctl 状态 xinetd
Nov 11 21:24:00 netunique.ourhome.com xinetd[2161]: xinetd Version 2.3.15 started with libwrap loadavg labeled-ne... in.
Nov 11 21:24:00 netunique.ourhome.com xinetd[2161]: Started working: 1 available service
telnet 192.168.240.37 65123(预期行为)
[root@netunique xinetd.d]# telnet 192.168.240.37 65123
Trying 192.168.240.37...
Connected to 192.168.240.37.
Escape character is '^]'.
Enter your name: John Smith <-- I type name after prompt here
John Smith <-- Script prints entry back to screen
Connection closed by foreign host. <-- Script does its quit()
telnet 192.168.240.37 65123(实际行为)
[root@netunique xinetd.d]# telnet 192.168.240.37 65123
Trying 192.168.240.37...
Connected to 192.168.240.37.
Escape character is '^]'.
<blank> <-- no prompt as expected
John Smith <-- I enter some data and hit Enter
Enter your name: John Smith <-- Hard to tell exactly what happened here
Connection closed by foreign host. <-- Hard to tell exactly what happened here
[root@netunique xinetd.d]#
当我说“很难确切地说出这里发生了什么”时,我的意思是很难判断在上面的输出中出现在“输入你的名字:”提示之后的“约翰·史密斯”是否是 print 语句的结果,并且很难判断“连接被外部主机关闭”是否是 quit() 语句的结果。
nc 192.168.240.37 65123(实际行为)
[root@netunique xinetd.d]# nc 192.168.240.37 65123
<blank> <-- no prompt as expected
John Smith <-- I enter some data and hit Enter
Enter your name: John Smith <-- Hard to tell exactly what happened here
<-- Nothing happened here, I hit Enter
<-- I hit Enter again
Ncat: Broken pipe. <-- This is the end result
如您所见,我与 netcat 的行为非常相似。