old_contents: import os
  import re
  
  from flask import Flask, request, abort
  from linebot import LineBotApi, WebhookHandler
  from linebot.exceptions import InvalidSignatureError
  from linebot.models import (
      MessageEvent, TextMessage, TextSendMessage, ImageSendMessage
  )
  
  from bot.main import process_message
  from bot.sessions import Session
  from bot.constants import RESPONSES, Context
  
  
  app = Flask(__name__)
  session = Session()
  
  line_bot_api = LineBotApi(os.environ.get('LINE_ACCESS_TOKEN', None))
  handler = WebhookHandler(os.environ.get('LINE_SECRET', None))
  
  
  @app.route("/callback", methods=['POST'])
  def callback():
      # get X-Line-Signature header value
      signature = request.headers['X-Line-Signature']
  
      # get request body as text
      body = request.get_data(as_text=True)
      app.logger.info("Request body: " + body)
  
      # handle webhook body
      try:
          handler.handle(body, signature)
      except InvalidSignatureError:
          abort(400)
  
      return 'OK'
  
  
  @handler.add(MessageEvent, message=TextMessage)
  def handle_message(event):
      # chat_id = event.source.user_id or event.source.group_id or event.source.room_id
      # user_message = event.message.text
      #
      # data = {
      #     'chat_id': chat_id,
      #     'message': user_message
      # }
  
      # bot_response, delay, image = process_message(session, data)
      line_bot_api.reply_message(
          event.reply_token,
          TextSendMessage(text=event.message.text))
  
      # while (delay):
      #     data['message'] = ''
      #     bot_response, delay, image = process_message(session, data)
      #     bot_response = re.sub(r'\<.*?\>', '', bot_response)
      #     line_bot_api.push_message(chat_id, TextSendMessage(text=bot_response))
      #     line_bot_api.push_message(
      #         chat_id,
      #         ImageSendMessage(original_content_url=image, preview_image_url=image)
      #     ) if image else None
      #     line_bot_api.push_message(
      #         chat_id,
      #         TextSendMessage(text=RESPONSES[Context.EXPIRED])
      #     ) if not delay else None
  
  
  if __name__ == "__main__":
      app.run(debug=True)
  
new_contents: import os
  import re
  
  from flask import Flask, request, abort
  from linebot import LineBotApi, WebhookHandler
  from linebot.exceptions import InvalidSignatureError
  from linebot.models import (
      MessageEvent, TextMessage, TextSendMessage, ImageSendMessage
  )
  #
  # from bot.main import process_message
  # from bot.sessions import Session
  # from bot.constants import RESPONSES, Context
  
  
  app = Flask(__name__)
  # session = Session()
  
  line_bot_api = LineBotApi(os.environ.get('LINE_ACCESS_TOKEN', None))
  handler = WebhookHandler(os.environ.get('LINE_SECRET', None))
  
  
  @app.route("/callback", methods=['POST'])
  def callback():
      # get X-Line-Signature header value
      signature = request.headers['X-Line-Signature']
  
      # get request body as text
      body = request.get_data(as_text=True)
      app.logger.info("Request body: " + body)
  
      # handle webhook body
      try:
          handler.handle(body, signature)
      except InvalidSignatureError:
          abort(400)
  
      return 'OK'
  
  
  @handler.add(MessageEvent, message=TextMessage)
  def handle_message(event):
      # chat_id = event.source.user_id or event.source.group_id or event.source.room_id
      # user_message = event.message.text
      #
      # data = {
      #     'chat_id': chat_id,
      #     'message': user_message
      # }
  
      # bot_response, delay, image = process_message(session, data)
      line_bot_api.reply_message(
          event.reply_token,
          TextSendMessage(text=event.message.text))
  
      # while (delay):
      #     data['message'] = ''
      #     bot_response, delay, image = process_message(session, data)
      #     bot_response = re.sub(r'\<.*?\>', '', bot_response)
      #     line_bot_api.push_message(chat_id, TextSendMessage(text=bot_response))
      #     line_bot_api.push_message(
      #         chat_id,
      #         ImageSendMessage(original_content_url=image, preview_image_url=image)
      #     ) if image else None
      #     line_bot_api.push_message(
      #         chat_id,
      #         TextSendMessage(text=RESPONSES[Context.EXPIRED])
      #     ) if not delay else None
  
  
  if __name__ == "__main__":
      app.run(debug=True)
  
subject: Debug line