optimized list downloading process

get_recommended_filters.sh

@@ -1,7 +1,6 @@
 #!/bin/bash
 
-# create an empty input.csv file
-touch input.csv
+source $(dirname "$0")/helpers.sh
 
 # declare an array of urls
 urls=(
@@ -14,18 +13,8 @@ urls=(
   https://raw.githubusercontent.com/StevenBlack/hosts/master/hosts
 )
 
-# loop through the urls and download each file with curl
-for url in "${urls[@]}"; do
-  # get the file name from the url
-  file=$(basename "$url")
-  # download the file with curl and save it as file.txt
-  curl -o "$file.txt" "$url"
-  # append the file contents to input.csv and add a newline
-  cat "$file.txt" >> input.csv
-  echo "" >> input.csv
-  # remove the file.txt
-  rm "$file.txt"
-done
+# download all files in parallel and append them to input.csv
+download_lists $urls 'input.csv'
 
 # print a message when done
 echo "Done. The input.csv file contains merged data from recommended filter lists."