/usr/share/munin/plugins/http_loadtime is in munin-node 1.4.6-3ubuntu3.
This file is owned by root:root, with mode 0o755.
The actual contents of the file can be viewed below.
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# -*- sh -*-
: << =cut
=head1 NAME
http_loadtime - Plugin to graph HTTP response time of a specific page
=head1 CONFIGURATION
The following environment variables are used by this plugin
target - URL to fetch (default: "http://localhost/")
=head1 AUTHOR
Unknown author
=head1 LICENSE
Unknown license
=head1 MAGIC MARKERS
#%# family=auto
#%# capabilities=autoconf
=cut
target=${target:-"http://localhost/"}
time_bin=$(which time)
wget_bin=$(which wget)
if [ "$1" = "autoconf" ]; then
result="yes"
[ "x$time_bin" = "x" ] && result=1
[ "x$wget_bin" = "x" ] && result=2
if [ "$result" != "yes" ]; then
echo "no (need time and wget programs)"
exit 0
fi
echo yes
exit 0
fi
if [ "$1" = "config" ]; then
echo "graph_title HTTP loadtime of a page"
echo "graph_args --base 1000 -l 0"
echo "graph_vlabel Load time in seconds"
echo "graph_category network"
echo "graph_info This graph shows load time in seconds of $target"
echo "loadtime.label loadtime"
echo "loadtime.info Load time"
exit 0
fi
TMPDIR=`mktemp -d` || exit 1
trap "rm -rf $TMPDIR" EXIT
cd $TMPDIR || exit 1
loadtime=$($time_bin -p $wget_bin -p --no-cache --delete-after $target -q 2>&1 | awk '/^real / { print $2 }')
cd ..
echo "loadtime.value $loadtime"
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