telegram_send.sh

#! /bin/bash

die() {
  echo "EDIT YOUR ~/telegram_bot.rc AND RE-RUN!" 1>&2
  exit 1
}

if [ ! -f $HOME/telegram_bot.rc ]; then
cat >$HOME/telegram_bot.rc <<_EOF_
#
# BOT_KEY='123456:enterYourTelegramBotAPIKeyHere'
#
BOT_KEY=''

#
# BOT_MASTER=your telegram id (ID! not your telephone!)
#
BOT_MASTER=

# REMOVE THIS LINE AND BELOW AFTER EDITING AND CHECKING
echo "YOU ARE LAZY! CHECK YOUR CONFIG!"
exit 1

_EOF_
  die
fi

source $HOME/telegram_bot.rc
[ "x$BOT_KEY" = "x" -o "x$BOT_MASTER" = "x" ] && die

rawurlencode() {
  # see
  # http://stackoverflow.com/questions/296536/how-to-urlencode-data-for-curl-command
  #
  local string="${*}"
  local strlen=${#string}
  local encoded=""

  for (( pos=0 ; pos<strlen ; pos++ )); do
     c=${string:$pos:1}
     case "$c" in
        [-_.~a-zA-Z0-9] ) o="${c}" ;;
        * )               printf -v o '%%%02x' "'$c"
     esac
     encoded+="${o}"
  done
  REPLY="${encoded}"   #+or echo the result (EASIER)... or both... :p
}

message_wget() {
  rawurlencode "$*"
  wget "https://api.telegram.org/bot${BOT_KEY}/sendMessage?chat_id=${BOT_MASTER}&text=${REPLY}" -O /dev/null &>/dev/null
}

message_curl() {
  curl -X POST \
    --data-urlencode "chat_id=${BOT_MASTER}" \
    --data-urlencode "text=${*}" \
    "https://api.telegram.org/bot${BOT_KEY}/sendMessage" &>/dev/null
}

message_null() {
  echo "<<<MESSAGE>>>
$*
--- --- ---
"

}

if [ "x$*" = "x" ]; then
  message "hello from $(hostname)"
else
  hdr="$(date +'%Y/%m/%d_%H:%M:%S') @ #$(hostname)"
  case "$1" in 
  "error"|"ERROR")
    shift
    hdr="$hdr #error"
    ;;
  "warn"|"WARN"|"warning"|"WARNING")
    shift
    hdr="$hdr #warning"
    ;;
  "info"|"INFO")
    shift
    hdr="$hdr #info"
    ;;
  *)
    ;;
  esac
  
  if [ "x$*" = "x-" ]; then
    IFS="2p3o48u y2;lhqwe rfo8q23y@$#$Q#@%$25"
    body=''
    while read -s L
    do
      body="$body
$L"
    done
  else
    body="$*"
  fi
  msg="::: $hdr :::
$body

"
  if which curl >/dev/null
  then
    message_curl "$msg"
  elif which wget >/dev/null
  then
    message_wget "$msg"
  else
    message_null "$msg"
  fi
  
fi