Extract all files from an HAR archive

#!/bin/bash
######################################################################
#Copyright (C) 2025 Kris Occhipinti
#https://filmsbykris.com
#This program is free software: you can redistribute it and/or modify
#it under the terms of the GNU General Public License as published by
#the Free Software Foundation version 3 of the License.

#This program is distributed in the hope that it will be useful,
#but WITHOUT ANY WARRANTY; without even the implied warranty of
#MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#GNU General Public License for more details.

#You should have received a copy of the GNU General Public License
#along with this program.  If not, see <http://www.gnu.org/licenses/>.
######################################################################

# Extracts all files from an har file

# fatal uses SIGUSR1 to allow clean fatal errors
trap "exit 1" 10
PROC=$$

function error() {
  red=$(echo -en "\e[31m")
  normal=$(echo -en "\e[0m")

  echo -e "${red}$@${normal}" >&2
  #  exit 1
  kill -10 $PROC
}

[[ $1 ]] || error "Input file needed\n$0 file.har"
har_file="$1"
[[ -f $har_file ]] || error "$har_file does not exist"

output_dir="extracted_files"

mkdir -p "$output_dir"

cat "$har_file" | jq -cr '.log.entries[] | {url: .request.url, content: .response.content.text, encoding: .response.content.encoding}' |
  while read -r entry; do
    echo "$entry"
    url=$(echo "$entry" | jq -r '.url')
    content=$(echo "$entry" | jq -r '.content')
    encoding=$(echo "$entry" | jq -r '.encoding')

    # Simple filename based on URL (adjust as needed)
    filename=$(basename "$url" | cut -d\? -f1)

    if [ "$encoding" == "base64" ]; then
      echo "$content" | base64 -d >"$output_dir/$filename"
    else
      echo "$content" >"$output_dir/$filename"
    fi
  done