Download file from cloud.mail.ru from linux console with bash script

dl-cloud-mail-ru.sh

#!/usr/bin/env bash

# idea: https://novall.net/itnews/bash-skript-dlya-skachivaniya-fajlov-s-mail-ru-cherez-konsol-linux.html

URL="$1"
FILENAME="$2"

[ -z "$FILENAME" ] && {
	echo "Syntax: `basename $0` <url> <dst_path>" >&2
	exit 1
}

URLPART0=$(wget --quiet -O - $URL | grep -o '"weblink_get":\[[^]]\+\]' | sed 's/.*"url":"\([^"]\+\)".*/\1/')
URLPART1=$(echo $URL | awk -F '/public/' '{print $2}')
URLPART2=$(wget --quiet -O - "https://cloud.mail.ru/api/v2/tokens/download" | sed 's/.*"token":"\([^"]\+\)".*/\1/')
wget --no-check-certificate --referer=$URL "$URLPART0/$URLPART1/$FILENAME?key=$URLPART2" -O $FILENAME