#!/bin/bash
# webaccess - Analyzes an Apache-format access_log file, extracting
#    useful and interesting statistics.

bytes_in_gb=1048576
# You will want to change the following to match your own host name 
# to help weed out internally referred hits in the referrer analysis.
host="intuitive.com"

if [ $# -eq 0 ] ; then
  echo "Usage: $(basename $0) logfile" >&2
  exit 1
fi

if [ ! -r "$1" ] ; then
  echo "Error: log file $1 not found." >&2
  exit 1
fi

firstdate="$(head -1 "$1" | awk '{print $4}' | sed 's/\[//')"
lastdate="$(tail -1 "$1" | awk '{print $4}' | sed 's/\[//')"

echo "Results of analyzing log file $1"
echo ""
echo "  Start date: $(echo $firstdate|sed 's/:/ at /')"
echo "    End date: $(echo $lastdate|sed 's/:/ at /')"

hits="$(wc -l < "$1" | sed 's/[^[:digit:]]//g')"

echo "        Hits: $(nicenumber $hits) (total accesses)"

pages="$(grep -ivE '(.txt|.gif|.jpg|.png)' "$1" | wc -l | sed 's/[^[:digit:]]//g')"

echo "   Pageviews: $(nicenumber $pages) (hits minus graphics)"

totalbytes="$(awk '{sum+=$10} END {print sum}' "$1")"

/bin/echo -n " Transferred: $(nicenumber $totalbytes) bytes "

if [ $totalbytes -gt $bytes_in_gb ] ; then
  echo "($(scriptbc $totalbytes / $bytes_in_gb) GB)"
elif [ $totalbytes -gt 1024 ] ; then
  echo "($(scriptbc $totalbytes / 1024) MB)"
else
  echo ""
fi

# Now let's scrape the log file for some useful data:

echo ""
echo "The ten most popular pages were:"

awk '{print $7}' "$1" | grep -ivE '(.gif|.jpg|.png)' | \
  sed 's/\/$//g' | sort | \
  uniq -c | sort -rn | head -10

echo ""

echo "The ten most common referrer URLs were:"

awk '{print $11}' "$1" | \
  grep -vE "(^\"-\"$|/www.$host|/$host)" | \
  sort | uniq -c | sort -rn | head -10

echo ""
exit 0