proxycheck.sh

# A zsh function which will check my proxy configuration.
# Runs only on macOS.
proxycheck() {
  local red=`tput setaf 1; tput bold`
  local green=`tput setaf 2; tput bold`
  local cyan=`tput setaf 6; tput bold`
  local reset=`tput sgr0`
  local systemflag=0
  networksetup -listallnetworkservices | while read line
  do
    if [[ $line != *"An asterisk"* ]]; then
      local systemproxy=$(networksetup -getwebproxy $line | /usr/bin/grep -e '^Enabled:' | awk '{print $2}')
      if [ $systemproxy = "Yes" ]; then
        echo "System:  [${green}ON${reset}] $line"
        systemflag=1
      fi
    fi
  done
  if [ $systemflag = 0 ]; then
    echo "System:  [${cyan}No proxy${reset}]"
  fi

  local count=$(/usr/bin/grep -c 'network.proxy.type' $HOME/Library/Application\ Support/Firefox/Profiles/*/prefs.js)
  echo -n "Firefox: "
  if [ $count -gt 1 ]; then
    echo "Found more than one prefs.js"
    return -1
  elif [ $count -eq 0 ]; then
    if [ $systemflag = 1 ]; then
      echo "[${green}Use system proxy settings${reset}]"
      return 1
    else
      echo "[${cyan}Use system proxy settings${reset}]"
      return 0
    fi
  else
    local proxytype=$(/usr/bin/grep 'network.proxy.type' $HOME/Library/Application\ Support/Firefox/Profiles/*/prefs.js | sed 's/[^0-9]//g')
    # ref. https://developer.mozilla.org/ja/docs/Mozilla_Networking_Preferences
    case "$proxytype" in
      0) echo "[${cyan}No proxy${reset}]"; return 0 ;;
      1) echo "[${green}ON${reset}] Manual proxy configuration" ; return 1 ;;
      2) echo "[${green}ON${reset}] Automatic proxy configuration URL (PAC)" ; return 1 ;;
      4) echo "[${green}ON${reset}] Auto-detect proxy settings for this network" ; return 1 ;;
      *) echo "[${red}UNKNOWN${reset}]" ; return -1 ;;
    esac
  fi
}