Question

I am having trouble with some Http Client connections returning NoHttpResponseException about 1 in 3 times.

My hypothesis is that the firewall is closing idle connections (not unusual).
I would like to use curl to mimic this.

I have been trying something like this but very likely the connection never goes idle

curl --keepalive-time 60 --limit-rate 128B $URL $URL $URL $URL $URL $URL $URL $URL $URL $URL $URL $URL $URL $URL

What I would like is something akin to

curl $URL
sleep 10
curl $URL    
sleep 20
curl $URL 
sleep 30
curl $URL 

Where each time (using some magic!) Curl reuses the same connection.

Is there any way to do this using curl (or wget) and not have to write a program to do it

Answer 1

There is no such thing you couldn’t do with netcat.

REQ="GET / HTTP/1.1\nHost: localhost\nAccept: *\n\n"
(echo -ne $REQ; sleep 1; echo -ne $REQ; sleep 2; echo -ne $REQ) | netcat localhost 80

Change the path to something different than / if you need it…