wget output simple parsing to show the download process

wget_download.sh

#!/bin/bash

download_status() {
  if [ -f $1 ]; then
    while : ; do
      sleep 1

      local speed=$(echo `cat $1 | grep -oh '\([0-9.]\+[%].*[0-9.][s|m|h|d]\)' | tail -1`)
      echo -n "Downloading... $speed"
      echo -n R | tr 'R' '\r'

      if [ -f $2 ]; then
        sleep 1
        local error=$(echo `cat $2`)
        if [ $error != '0' ]; then
          echo 
          if [ $error == '6' ]; then
            echo "Server authentication error, configure setup.ini properly. See the output log"
          else
            echo "Download error, exit code '$error'. See the output log"
          fi
          exit $?
        fi
        break
      fi
    done
  fi
}

# Usage:
`wget http://my.files.org/download.tar.gz > /tmp/download.log 2>&1 && echo $? > /tmp/download_success || echo $? > /tmp/download_success` &
download_status /tmp/download.log /tmp/download_success