icinga2-checks/check_curl

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#!/bin/bash
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# Define the usage message
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usage() {
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echo "Usage: $0 -u <url> [-w <warning>] [-c <critical>]"
exit 3
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}
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# Parse the command-line arguments
while getopts "u:w:c:C:H:R:lhIp" opt; do
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case $opt in
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u)
URL=$OPTARG
;;
w)
WARNING_LEVEL=$OPTARG
;;
c)
CRITICAL_LEVEL=$OPTARG
;;
l)
FOLLOW_REDIRECTS="-L"
;;
C)
CONTAINS=$OPTARG
;;
I)
INSECURE="--insecure"
;;
H)
HEADERS=$OPTARG
;;
p)
PRINT_ONLY=true
;;
R)
RESOLVE="--resolve $OPTARG"
;;
h)
usage
;;
*)
usage
;;
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esac
done
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WARNING_LEVEL=${WARNING_LEVEL:-1}
CRITICAL_LEVEL=${CRITICAL_LEVEL:-2}
#FOLLOW_REDIRECTS=${FOLLOW_REDIRECTS:-""}
if [ -z "$URL" ]; then
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usage
fi
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HEADER_ARGS=""
IFS=',' read -ra values <<<"$HEADERS"
for value in "${values[@]}"; do
HEADER_ARGS+="-H '$value'"
done
CURL_CMD="-s -w '%{http_code}\n%{time_total}' $HEADER_ARGS $FOLLOW_REDIRECTS $INSECURE $RESOLVE $URL"
if $PRINT_ONLY; then
echo "curl $CURL_CMD"
exit 3
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fi
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TMP_ERROR_LOG=$(mktemp)
TMP_RESPONSE=$(mktemp)
RESPONSE=$(curl -v -o "$TMP_RESPONSE" "$CURL_CMD" 2>"$TMP_ERROR_LOG")
# shellcheck disable=SC2181
if [ $? -ne 0 ]; then
echo "CRITICAL: curl failed!"
echo "Error log:"
cat "$TMP_ERROR_LOG"
exit 2
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fi
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rm -rf "$TMP_ERROR_LOG"
RESPONSE_CODE=$(echo "$RESPONSE" | head -n 1)
RESPONSE_TIME=$(printf "%.2f" "$(echo "$RESPONSE" | tail -n 1)")
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OUTPUT_MSG=""
OUTPUT_CODE=0
if [ $RESPONSE_CODE -eq 200 ] && [ "$(echo "$RESPONSE_TIME < $CRITICAL_LEVEL" | bc -l)" -eq 1 ]; then
OUTPUT_MSG="OK: website is up and responded in $RESPONSE_TIME seconds."
elif [ $RESPONSE_CODE -eq 200 ] && [ "$(echo "$RESPONSE_TIME < $WARNING_LEVEL" | bc -l)" -eq 1 ]; then
OUTPUT_MSG="WARNING: response time is slow ($RESPONSE_TIME seconds)."
OUTPUT_CODE=1
elif [ $RESPONSE_CODE -eq 200 ]; then
OUTPUT_MSG"CRITICAL: response time is very slow ($RESPONSE_TIME seconds)."
OUTPUT_CODE=2
else
OUTPUT_MSG="CRITICAL: website is not responding, returned $RESPONSE_CODE code."
OUTPUT_CODE=2
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fi
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if [ ! -z ${CONTAINS+x} ]; then
if ! grep -q "$CONTAINS" "$TMP_RESPONSE"; then
OUTPUT_MSG+="\nCRITICAL: response did not contain required string!\nFound: $(cat "$TMP_RESPONSE")"
OUTPUT_CODE=2
else
OUTPUT_MSG+="\nOK: response contained required string."
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fi
fi
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rm -rf "$TMP_RESPONSE"
OUTPUT_MSG+=" | response_time=${RESPONSE_TIME}s;$WARNING_LEVEL;$CRITICAL_LEVEL;0"
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echo -e "$OUTPUT_MSG"
exit $OUTPUT_CODE