Simple Load Test

gistfile1.sh

#!/bin/sh

REQUEST="http://example.com"
NUM_REQ=100
CONCURENT=10

# Set up parallel processes (http://mlo.io/blog/2012/06/13/parallel-processes-in-bash.html)
mkfifo pipe
exec 3<>pipe
rm -rf pipe

i=0
while [[ "$i" -lt "$CONCURENT" ]]; do
	{ sleep 5; echo >&3; } &
	i=$(expr $i + 1)
done

PROCESSED=0

run_request() {
	resp=$(curl -sL -w "%{http_code}" "$REQUEST" -o /dev/null)
	if [[ "$resp" == "200" ]]; then
		printf '.'
	else
		printf 'E'
	fi
}

is_done() {
	if [[ "$PROCESSED" -ge "$NUM_REQ" ]]; then
		return 0
	else
		return 1
	fi
}

while read; do
	if [[ "$PROCESSED" -lt "$NUM_REQ" ]]; then
		PROCESSED=$(expr $PROCESSED + 1)
		if (run_request; echo >&3; is_done ); then
			echo
			echo "Done"
			break
		fi
	fi
done <&3