Update main.py

main.py

@@ -1,5 +1,5 @@
 from fastapi.middleware.cors import CORSMiddleware
-from fastapi import FastAPI, Request
+from fastapi import FastAPI, Request,  Header
 
 import json
 import os
@@ -33,17 +33,12 @@ def root():
      return {"title": "Echo Bot"}
 
 @app.post("/webhook")
-def webhook(request: Request):
-    # 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
+async def webhook(request: Request, x_line_signature: str = Header(None)):
+    body = await request.body()
     try:
-        line_handler.handle(body, signature)
+        line_handler.handle(body.decode("utf-8"), x_line_signature)
     except InvalidSignatureError:
-        abort(400)
+        raise HTTPException(status_code=400, detail="chatbot handle body error.")
     return 'OK'
 
 @line_handler.add(MessageEvent, message=TextMessage)