Fetch and cache the data

gistfile1.sh

#!/bin/bash

set -e

cd $(dirname $0)
base=$(pwd)

url='' # INPUT URL
tmp_file=`date +%s`_shop.json # INPUT TEMPORARY FILE NAME
dest='shop.json' # INPUT OUTPUT FILE NAME

assert_same() {
    if [ "$1" = "$2" ]; then
        return 0;
    fi

    return 1
}

fetch() {
    curl_out=`curl -s -k -w "%{http_code}" -o $tmp_file $url`
    http_code=`echo "$curl_out" | cut -f1`

    return 0
}

main() {
    debug=false
    args=""
    local argc=0
    local argv=()

    while [ $# -gt 0 ]; do
        case $1 in
            --debug)
                debug=true
                ;;
        esac
  
        shift
    done

    fetch

    if $debug; then
        echo "url: $url"
        echo "tmp_file: $tmp_file"
        echo "dest: $dest"
        echo "http_code: $http_code"
    fi

    assert_same 200 $http_code && cp $tmp_file $dest && rm $tmp_file && exit 0

    exit 1
}

main $*