Nginx handy control script

nxctl

#!/bin/bash

# variable in [] is optional

# cache
#   flush [name]
#       all
#   size
#   status [name]
# cert
#   create [name]
# site
#   enable
#   disable

cache_path=/var/www/nginx_cache/*
action=$2
site=$3


case "$1" in
cache) #Cache
    case "$2" in
        flush)
            if [ "${3}" == "all" ]; then
                echo "flushing all cache";
                $(rm -rf ${cache_path})
            elif [ "${3}" == "key" ]; then
                echo "Flushing key ${4}";

                string=$4

                if [[ "${string}" == "hash" ]]; then
                    md5=$5
                else 
                    md5=$(echo -n ${string} | md5sum | awk '{ print $1}' );
                fi

                length=$(echo ${#md5});
                d1=$(echo "${length} - 1" | bc);
                d2=$(echo "${length} - 3" | bc);
                p1=$(echo ${md5:${d1}:1} );
                p2=$(echo ${md5:${d2}:2} );

                cache="${cache_path}${p1}/${p2}/${md5}"

                if [ ! -f "${cache}" ]; then
                    echo "File not found!"
                else
                    echo "File found";
                    size=$(du -h "${cache}" | awk '{print $1}');
                    rm -f "${cache}"
                    echo "Cache flushed, size: ${size}";
                fi

            else
                echo "flushing ${3}";
                $(grep -lr '$3' ${cache_path} | xargs rm)
            fi
            ;;
        size)
                        echo "Getting size";
            size=$(du  -c ${cache_path}|grep total);
            size=$(echo $size | awk '{print $1 }');
            maxsize=$(grep 'max_size' /etc/nginx/nginx.conf | grep -Po '([0-9]{2,4})');
            size=$(expr $size / 1024);
            pr=$(echo "scale=2; ${size}*100/${maxsize}" | bc);
            echo "---------------------------"
            echo "Current size:  ${size}m"
            echo "Maxsize:       ${maxsize}m"
            echo "Percentage:    ${pr}%"
            echo "---------------------------"
            ;;

        status)
            if [[ -z "${3}" ]]; then
                log="/var/log/nginx/*-access.log";
                echo "Getting Cache status of all logs"
            else
                log="/var/log/nginx/${3}-access.log";
                echo "Getting status for ${3}"
            fi
            total_hit=0
            total_miss=0
            hits=$(grep "HIT" $log | grep -Po '(200 [0-9]{1,10})' | grep -Po ' [0-9]{1,10}')
            miss=$(grep -P "(MISS|BYPASS|EXPIRED)" $log | grep -Po '(200 [0-9]{1,10})' | grep -Po ' [0-9]{1,10}')
            for i in $hits
               do
                total_hit=$(echo $total_hit + $i | bc);
            done
            for i in $miss
               do
                total_miss=$(echo $total_miss + $i | bc);
            done


            total_hit=$(echo $total_hit / 1024 | bc);
            total_miss=$(echo $total_miss / 1024 | bc);
            echo "${total_hit} kbs saved";
            echo "${total_miss} kbs All"
            echo "---------------------------"
            grep -Po '(HIT|MISS|BYPASS|EXPIRED)' ${log} | grep -Po '(HIT|MISS|BYPASS|EXPIRED)' | sort | uniq -c | sort -r
            echo "---------------------------"

            ;;
        *) echo "Missing argument, size|flush [all|name]"
           ;;
    esac
    ;;
cert)  echo  "Cert"
    if [[ -z "${2}" ]]; then
        echo "Website name needed, ex: www.examle.com";
    else
        echo "Creating SSL request for ${2}"
        $(openssl req -new -newkey rsa:4096 -nodes -keyout ./${2}.key -out ./${2}.csr)
        echo "Write to files in current dir";
    fi
    ;;
site)
    if [[ -z "${2}" ]]; then
        echo "Action is needed, (disable|enable)"
        exit 0;
    fi;

    if [[ -z "${3}" ]]; then
        echo "Site is needed, ex: www.example.com.conf"
        exit 0;
    fi

    if [ $action == "enable" ]; then
        if [ ! -f "/etc/nginx/conf.d/sites-available/${site}" ]; then
            echo "Site not found!"
            exit 0;
        else
            echo "Adding ${site} to nginx site-enabled"
            $(ln -s /etc/nginx/conf.d/sites-available/${site} /etc/nginx/conf.d/sites-enabled/${site})
        fi
    fi

    if [ $action == "disable" ]; then
        if [ ! -f "/etc/nginx/conf.d/sites-enabled/${site}" ]; then
            echo "Site not found!"
            exit 0;
        else
            echo "Removing ${site} from nginx site-enabled"
            $(rm -f /etc/nginx/conf.d/sites-enabled/${site})
        fi
    fi
    ;;
*) 

    echo "----------------------------------";
    echo "   Missing operation, cache|cert|site";
    echo "   [] is optional"
    echo "   <var> is user defined"
    echo "cache"
    echo "   nxctl cache, shows status and size of cache, and flush cache"
    echo "   nxctl cache status|size|flush [<name>|all|hash [md5 [<md5hash>]|<cachekey>]] ";
    echo "   ex: nxctl cache flush jquery.js"
    echo "cert"
    echo "   nxctl cert, creates CSR in current directory"
    echo "   ex: nxctl cert example.com"
    echo "site"
    echo "   nxctl site enable|disable <name of configfile.conf>"
    echo "   ex: nxctl site enable example.com.conf";

   ;;
esac