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RunnerRick/captureHttp.sh

Last active June 14, 2017 05:54
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Using TCPDUMP to monitor incoming HTTP traffic (poor man's Wireshark).
Raw
captureHttp.sh
#!/usr/bin/env bash
echo $1 | grep -E -q "^[0-9]+$" || (echo "Please specify a port number to listen to." ; exit 1)
PORT=$1
TCPDUMPARG="tcp port $PORT and (((ip[2:2] - ((ip[0]&0xf)<<2)) - ((tcp[12]&0xf0)>>2)) != 0)"
sudo tcpdump -s 0 -A -i lo0 $TCPDUMPARG
# See also http://naleid.com/blog/2008/04/03/monitoring-http-traffic-to-debug-your-grails-application/
@thiagoghisi
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Amazing stuff! Thanks for sharing!

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