netcat是否可能有条件响应 [英] Is a conditional response possible with netcat
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问题描述
我想运行netcat( netcat-openbsd 1.105-7ubuntu1
)并模拟聊天序列.我想要netcat自动响应.
I want to run netcat (netcat-openbsd 1.105-7ubuntu1
) and simulate a chat sequence. I want the netcat response automatically.
我想要的例子.
NETCAT: nc -l 8080
CLIENT: nc localhost 8080
CLIENT: hello
NETCAT: (if statment)
if hello
do hello friend
if bye
do bye friend
send a FIN tcp
default
date()
I copied the code of this question (in the asnwer by @wooghie): run a command conditionally with netcat and grep ...but the message wasn't sent to the client. Netcat was on listen mode.
#!/bin/bash
netcat -l 8080 | while read line
do
match=$(echo $line | grep -c 'Hello')
if [ $match -eq 1 ]; then
printf "Hello friend\r\n\r\n"
fi
done
推荐答案
我认为您要期望(1).类似于以下内容:
I think you want expect(1). Something along the lines of:
#!/usr/bin/env expect
spawn nc localhost 8080
expect {
hello {
send "hello dude"
} bye {
close
} -re .* {
send [date]
}
}
请注意,expect实际上是Tcl,它本身具有非常强大的功能.
未经测试.YMMV.
Note that expect is really Tcl, which is very powerful in its own right.
Not tested. YMMV.
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