#!/bin/bash
#
#healthcheck on munin
#check site speed.
#egrep contents string
# ... and alert.
#
#programmed by rti (hiroyuki fujie) super.rti@gmail.com @super_rti
#LICENSE: NYSL (public domain)
#
#config file
#      /etc/munin/plugin-conf.d/munin-node
#
#example minimum config
#---------------------------------------------------
#[healthcheck_url]
#env.url_1  http://127.0.0.1/
#---------------------------------------------------
#
#check two site
#---------------------------------------------------
#[healthcheck_url]
#env.url_1  http://127.0.0.1/
#env.url_2  http://www.google.com/
#---------------------------------------------------
#
#check three site
#---------------------------------------------------
#[healthcheck_url]
#env.url_1  http://127.0.0.1/
#env.url_2  http://www.google.com/
#env.url_3  http://www.yahoo.com/
#---------------------------------------------------
#
#set name
#---------------------------------------------------
#[healthcheck_url]
#env.url_1  http://127.0.0.1/
#env.name_1 homhom
#---------------------------------------------------
#
#check over proxy
#---------------------------------------------------
#[healthcheck_url]
#env.url_1  http://127.0.0.1/
#env.proxy_1 127.0.0.1:8080
#---------------------------------------------------
#
#set slow speed(second)
#---------------------------------------------------
#[healthcheck_url]
#env.url_1  http://127.0.0.1/
#env.slowspeed_1 30
#---------------------------------------------------
#
#grep string
#---------------------------------------------------
#[healthcheck_url]
#env.url_1  http://127.0.0.1/
#env.htmlgrep_1 saysaya
#---------------------------------------------------
#
#check html contents byte size.
#---------------------------------------------------
#[healthcheck_url]
#env.url_1  http://127.0.0.1/
#env.htmlsize_1 50000                  #check 50000 bytes over.
#---------------------------------------------------
#
#full option
#/etc/munin/plugin-conf.d/munin-node
#---------------------------------------------------
#[healthcheck_url]
#env.url_1  http://127.0.0.1/          #check url
#env.htmlgrep_1 apache                 #check egrep string
#env.name_1 127.0.0.1                  #set line name. default by url domain
#env.proxy_1 127.0.0.1:8080            #over proxy
#env.slowspeed_1 30                    #slow time on alert
#env.htmlsize_1 50000                  #check 50000 bytes over.
#---------------------------------------------------
#
#

#edakari speed up.
CHECKMAX=`env | grep url_ | wc -l`
let CHECKMAX="$CHECKMAX + 1"

CURL=/usr/bin/curl

if [ "$1" = "autoconf" ]; then
    if [ $CHECKMAX -le 1 ]; then
         echo no
    else
         echo yes
    fi
    exit 0
fi

if [ "$1" = "config" ]; then
    echo 'graph_title site speed (second)'
    echo "graph_args --base 1000 -l 0 --vertical-label second"
    echo 'graph_scale no'
    echo 'graph_vlabel second'
    echo 'graph_category munin'
    echo 'graph_info This graph shows the site speed'

    for(( I = 1; I < $CHECKMAX; ++I ))
    do
         eval url=\$url_${I}
         eval name=\$name_${I}
         eval slowspeed=\$slowspeed_${I}
         if [ "x${url}" = "x" ]; then
              continue
         fi
         if [ "x${name}" = "x" ]; then
             #default name by domain
             name=`echo $url | sed 's#\.#_#g' | sed -e 's/[^/]*\/\/\([^@]*@\)\?\([^:/]*\).*/\2/'`
         fi
         if [ "x${slowspeed}" = "x" ]; then
             slowspeed=10
         fi
         let slowspeed15="slowspeed * 3 / 2" #slowspeed * 1.5

         echo "$name.label $name"
         echo "$name.info $url"
         echo "$name.draw LINE2"
         echo "$name.min -10"
         echo "$name.max ${slowspeed15}"
         echo "$name.critical 0:${slowspeed}"
    done

    exit 0
fi

for(( I = 1; I < $CHECKMAX; ++I ))
do
     eval url=\$url_${I}
     eval grep=\$htmlgrep_${I}
     eval size=\$htmlsize_${I}
     eval name=\$name_${I}
     eval proxy=\$proxy_${I}
     eval slowspeed=\$slowspeed_${I}

     if [ "x${url}" = "x" ]; then
        continue
     fi
     if [ "x${name}" = "x" ]; then
        #default name by domain
        name=`echo $url | sed 's#\.#_#g' | sed -e 's/[^/]*\/\/\([^@]*@\)\?\([^:/]*\).*/\2/'`
     fi

     PROXY_CMD=""
     if [ "x${proxy}" != "x" ]; then
        PROXY_CMD=" --proxy ${proxy} "
     fi
     if [ "x${slowspeed}" = "x" ]; then
        slowspeed=10
     fi
     let timeout="${slowspeed} + 1"

     START=`date +%s`
     HTML_RESULT=`$CURL "${url}" -s --connect-timeout ${timeout} ${PROXY_CMD}`
     CURLEXITCODE=$?
     END=`date +%s`

     if [ $CURLEXITCODE -ne 0 ]; then
         echo "$name.value -10"
         echo "$name.extinfo curl return $CURLEXITCODE"
         continue
     fi

     GREPEXITCODE=0
     if [ "x${grep}" != "x" ]; then
         echo $HTML_RESULT | egrep -i "${grep}" > /dev/null
         GREPEXITCODE=$?
         if [ $GREPEXITCODE -ne 0 ]; then
             echo "$name.value -9"
             echo "$name.extinfo can not found $grep regex strings"
             continue
         fi
     fi


     if [ "x${size}" != "x" ]; then
         if [ ${#HTML_RESULT} -lt ${size} ]; then
             echo "$name.value -8"
             echo "$name.extinfo html size ${#HTML_RESULT} is smaller than ${size}"
             continue
         fi
     fi


     let SPEED="$END - $START"
     echo "$name.value $SPEED"
done