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http-mon.sh
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#
# General http monitor code
# (sourced by apache and httpmon)
#
# Author: Alan Robertson
# Sun Jiang Dong
#
# Support: linux-ha@lists.linux-ha.org
#
# License: GNU General Public License (GPL)
#
# Copyright: (C) 2002-2005 International Business Machines
#
# default options for http clients
# NB: We _always_ test a local resource, so it should be
# safe to connect from the local interface.
bind_address="127.0.0.1"
curl_ipv6_opts=""
if ocf_is_true "$OCF_RESKEY_use_ipv6" || echo "$STATUSURL" | grep -qs "::"; then
bind_address="::1"
curl_ipv6_opts="-g"
fi
WGETOPTS="-O- -q -L --no-proxy --bind-address=$bind_address"
CURLOPTS="-o - -Ss -L --interface lo $curl_ipv6_opts"
request_url_header() {
which curl >/dev/null 2>&1
if [ $? -eq 0 ]; then
curl -IL --connect-timeout 5 --interface lo $curl_ipv6_opts "$1" > /dev/null 2>&1
return $?
fi
which wget >/dev/null 2>&1
if [ $? -eq 0 ]; then
local header=$(wget --server-response --spider --timeout=5 --tries=2 "$1" 2>&1)
if [ $? -eq 0 ]; then
return $OCF_SUCCESS
fi
# a 4xx error is still a server response.
echo "$header" | grep "HTTP/1.1 4.. " > /dev/null 2>&1
return $?
fi
return $OCF_ERR_GENERIC
}
#
# run the http client
#
curl_func() {
cl_opts="$CURLOPTS $test_httpclient_opts"
if [ x != "x$test_user" ]; then
echo "-u $test_user:$test_password" |
curl -K - $cl_opts "$1"
else
curl $cl_opts "$1"
fi
}
wget_func() {
auth=""
cl_opts="$WGETOPTS $test_httpclient_opts"
[ x != "x$test_user" ] &&
auth="--http-user=$test_user --http-passwd=$test_password"
wget $auth $cl_opts "$1"
}
#
# rely on whatever the user provided
userdefined() {
$test_httpclient $test_httpclient_opts "$1"
}
#
# find a good http client
#
findhttpclient() {
# prefer wget (for historical reasons)
if [ "x$CLIENT" != x ] && which "$CLIENT" >/dev/null 2>&1; then
echo "$CLIENT"
elif which wget >/dev/null 2>&1; then
echo "wget"
elif which curl >/dev/null 2>&1; then
echo "curl"
else
return 1
fi
}
gethttpclient() {
[ -z "$test_httpclient" ] &&
test_httpclient=$ourhttpclient
case "$test_httpclient" in
curl|wget) echo ${test_httpclient}_func;; #these are supported
*) echo userdefined;;
esac
}
# test configuration good?
is_testconf_sane() {
if [ "x$test_regex" = x -o "x$test_url" = x ]; then
ocf_log err "test regular expression or test url empty"
return 1
fi
if [ "x$test_user$test_password" != x -a \( "x$test_user" = x -o "x$test_password" = x \) ]; then
ocf_log err "bad user authentication for extended test"
return 1
fi
return 0
}
#
# read the test definition from the config
#
readtestconf() {
test_name="$1" # we look for this one or the first one if empty
lcnt=0
readdef=""
test_url="" test_regex=""
test_user="" test_password=""
test_httpclient="" test_httpclient_opts=""
while read key value; do
lcnt=$((lcnt+1))
if [ "$readdef" ]; then
case "$key" in
"url") test_url="$value" ;;
"user") test_user="$value" ;;
"password") test_password="$value" ;;
"client") test_httpclient="$value" ;;
"client_opts") test_httpclient_opts="$value" ;;
"match") test_regex="$value" ;;
"end") break ;;
"#"*|"") ;;
*) ocf_log err "$lcnt: $key: unknown keyword"; return 1 ;;
esac
else
[ "$key" = "test" ] &&
[ -z "$test_name" -o "$test_name" = "$value" ] &&
readdef=1
fi
done
}

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