wgetmd5

#!/bin/bash

#       ____            __  __
# 	   / __ \___ _   __/ / / /___  __  __________
# 	  / / / / _ \ | / / /_/ / __ \/ / / / ___/ _ \
# 	 / /_/ /  __/ |/ / __  / /_/ / /_/ (__  )  __/
# 	/_____/\___/|___/_/ /_/\____/\__,_/____/\___/ . com . br
#
#   Created by Leonardo Lima de Vasconcellos on 08-19-2012
#   leonardo@devhouse.com.br
#
#   * This script requires bash 4 or later
#
 
# Default language is English
language="en"

# if system language is Portuguese then set language to portuguese
if [ `expr match "$LANG" "pt_BR"` -gt 0 ] || [ `expr match "$LANG" "pt_PT"` -gt 0 ] ; then
    language="pt"
fi

# definition of messages
if [ "$language" == "pt" ] ; then
    declare -A messages=(
        ["error_no_arguments"]="\n\033[1;31mFaltam argumentos.\033[0m\n\n\tUso:\n\n\t$ wgetmd5 url_arquivo url_arquivo_md5\n\n"
        ["download_started"]="\n\n\033[1;32mIniciando download...\033[0m\n\n"
        ["download_success"]="\n\n\033[1;32mDownload concluido com sucesso!\033[0m\n\n"
        ["download_fail"]="\n\n\033[1;31mDownload corrompido!\033[0m\n\n"
    )
else
     declare -A messages=(
        ["error_no_arguments"]="\n\033[1;31mArgument missing.\033[0m\n\n\tUsage:\n\n\t$ wgetmd5 file_url md5_file_url\n\n"
        ["download_started"]="\n\n\033[1;32mStarting download...\033[0m\n\n"
        ["download_success"]="\n\n\033[1;32mDownload successful!\033[0m\n\n"
        ["download_fail"]="\n\n\033[1;31mDownload corrupted!\033[0m\n\n"
    )
fi

# if no arguments print usage message
if [ ! $1 ] && [ ! $2 ] ; then
    echo -e ${messages["error_no_arguments"]}
    exit 1
fi


# extract file names
filename=`basename $1`
md5filename=`basename $2`

# start download
echo -e ${messages["download_started"]}
wget $1 $2

# check md5sum from downloaded file
md5test=`md5sum "$filename" | awk '{print $1}'`

# extract md5sum string from downloaded md5 file
md5string=`cat "$md5filename" | awk '{print $1}'`

# if strings match then download ok
if [ "$md5test" == "$md5string" ] ; then
    echo -e ${messages["download_success"]}
    echo -e "$md5test" "==" "$md5string" "\n\n"
    exit 0
else
    echo -e ${messages["download_fail"]}
    echo -e "$md5test" "!=" "$md5string" "\n\n"
    exit 1
fi