Web Server Statistic Calculation

#!/bin/sh

usage="Usage: `basename $0` -f <frequency in seconds, min 1, default 60> -l <log file>"

# Set up options

while getopts ":l:f:" options; do

 case $options in

 l ) logFile=$OPTARG;;

 f ) frequency=$OPTARG;;

 \? ) echo -e $usage

  exit 1;;

 * ) echo -e $usage

  exit 1;;

 esac

done

# Test for logFile

if [  ! -n "$logFile" ]

then

 echo -e $usage

 exit 1

fi

# Test for frequency

if [  ! -n "$frequency" ]

then

 frequency=60

fi

# Test that frequency is an integer

if [  $frequency -eq $frequency 2> /dev/null ]

then

 :

else

 echo -e $usage

 exit 3

fi

# Test that frequency is an integer

if [  $frequency -lt 1 ]

then

 echo -e $usage

 exit 3

fi

if [ ! -e "$logFile" ]

then

 echo "$logFile does not exist."

 echo

 echo -e $usage

 exit 2

fi

NOW=$(tail -n1 $logFile | awk -F'[][]' '{ gsub(/\//," ",$2); sub(/:/," ",$2); "date +%s -d \""$2"\""|getline d; print d;}')

REF=$(($NOW - 1*60))

NUM=$REF

LINE=1

COUNT=0

BAD=0

lastCount=`wc -l $logFile | sed 's/\([0-9]*\).*/\1/'`

while true

do

while [ $NUM -ge $REF ]

do

 NUM=$( tail -n$LINE $logFile | head -1 | awk -F'[][]' '{ gsub(/\//," ",$2); sub(/:/," ",$2); "date +%s -d \""$2"\""|getline d; print d;}' )

 tail -n$LINE /var/log/httpd/access_log | head -1 | grep -i "200" >/dev/null && let COUNT=$COUNT+1

 tail -n$LINE /var/log/httpd/access_log | head -1 | grep -v "200" >/dev/null && let BAD=$BAD+1

 let LINE=$LINE+1

done

 let COUNT=$COUNT-1

 let BAD=$BAD-1

 curl -X POST -d '[{"name":"response","columns":["val1","val2"],"points":[['$COUNT','$BAD]]}]' "http://localhost:8086/db/server1/series?u=root&p=root"

 newCount=`wc -l $logFile | sed 's/\([0-9]*\).*/\1/'`

 diff=$(( newCount - lastCount ))

 rate=$(echo "$diff / $frequency" |bc -l)

 #echo $rate

 curl -X POST -d '[{"name":"hps","columns":["val"],"points":[['$rate']]}]' "http://localhost:8086/db/server1/series?u=root&p=root"

 lastCount=$newCount

 sleep $frequency

done