A simple example to illustrate log file parsing using AWK

logfileparse.awk

#!/usr/bin/awk -f

BEGIN {
  requests = 0
  getrq = 0
  postrq = 0
  count = 0
}

$0 ~ /(GET|POST)/ {
  requests++;
  if ($9 == "200") count++;
}

$0 ~ /GET/ {
  getrq++;
  # Remove a leading bracket from date column
  sub(/^\[/, "", $4);
  print $4 " <" $7 "> => " $9;
}

$0 ~ /POST/ {
  postrq++;
}

END {
  print "Total Requests: " requests;
  print "GET Requests: " getrq;
  print "POST Requests: " postrq;
  print "200 served: " count;
  print "success rate: " (count/requests)*100 "%"
}