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Scenario

Whenever the netcat server receives a connection, I want it to sleep for 2s before returning a HTTP response.

I know we can turn netcat into a simple HTTP server by something like nc -lp 3000 < httprespose.

Question

How do I simulate the 2s delay?

Tran Triet
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  • is socat a completely different binary from netcat? – Tran Triet Apr 09 '20 at 05:39
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    I don't know how you define "completely different binary". I know socat and netcat are different tools. – Kamil Maciorowski Apr 09 '20 at 05:46
  • Thanks. Just a side question - I was trying to get good at netcat since it's so versatile and recommended by many people. Are there anything netcat can do but socat can't in your opinion? – Tran Triet Apr 09 '20 at 05:49
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    I know there are things netcat cannot do but socat can. I suspect all things netcat can do, socat can do as well. Note there are at least two major implementations of netcat (aka nc). There is also ncat. See this. – Kamil Maciorowski Apr 09 '20 at 05:55
  • Thanks. I know about the different flavors of netcat but I guess they probably provide similar functionalities. Could you cook up a solution for my problem with socat and put in the answer? That'd really help me and I'll be very happy to accept it right away. – Tran Triet Apr 09 '20 at 06:03

1 Answers1

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I know a way with socat:

socat TCP-LISTEN:3000,fork SYSTEM:'sleep 2; cat httprespose',pty,echo=0

Roughly based on my another answer.

Kamil Maciorowski
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