When post /hubot/send_message, hubot send message to chat

http_post_server.coffee

module.exports = (robot) ->

  robot.router.post "/hubot/send_message", (req, res) ->
    if not req.body
      res.end ""
      return

    room_name = req.body.room
    message = req.body.message

    room_name = process.env.HUBOT_DEFAULT_POST_ROOM unless room_name

    robot.send {room: room_name}, message
    res.end "send #{room_name} #{message}"