我使用Python和无服务器在AWS上制作了echo工具。

我不断收到相同的请求。我读了一个常见问题，上面说您必须提供状态码200，否则它将继续重试网络挂接。

我不确定该怎么做。

我注意到呼叫的序列号始终相同，因此我假设我发送的回复未被确认。我的代码在这里

import os
import json
import requests
import random
from datetime import datetime
######################
# helper functions
######################
##recursively look/return for an item in dict given key
def find_item(obj, key):
    item = None
    if key in obj: return obj[key]
    for k, v in obj.items():
        if isinstance(v,dict):
            item = find_item(v, key)
            if item is not None:
                return item

##recursivley check for items in a dict given key
def keys_exist(obj, keys):
    for key in keys:
        if find_item(obj, key) is None:
            return(False)
    return(True)

##send txt via messenger to id
def send_message(send_id, msg_txt):
    print("Send message called")
    print (datetime.utcnow().strftime('%Y-%m-%d %H:%M:%S.%f')[:-3])
    params  = {"statusCode": 200,"access_token": os.environment['accesstoken']}
    headers = {"statusCode": "200","Content-Type": "application/json"}
    data = json.dumps({"statusCode": "200","recipient": {"id": send_id},
                       "message": {"text": msg_txt}})

    r = requests.post("https://graph.facebook.com/v2.9/me/messages", params=params, headers=headers, data=data)
    print (r.text)

    if r.status_code != 200:
        print(r.status_code)
        print(r.text)



#-----------------------------------------------------------

def hello(event, context):
    #debug
    event=json.loads(json.dumps(event))
    print("event:" )
    print(event)
    # print("context")
    # print(context)


    #handle webhook challenge
    try:

        if keys_exist(event, ["queryStringParameters","hub.verify_token","hub.challenge"]):
            print("subscribe to webhook invoked")
            v_token   = str(find_item(event, 'hub.verify_token'))
            challenge = find_item(event, 'hub.challenge')
            if ("strongtoken" == v_token):
                response = {
                    "statusCode": 200,
                    "body": str(challenge)
                }
                print(challenge)
                return response

        #handle messaging events
        if keys_exist(event, ['body']):
            event_entry=json.loads(event['body'])
            if ((len(event_entry['entry'])>0) & (keys_exist(event_entry['entry'][0],['messaging'])) ):
                messaging_event = event_entry['entry'][0]['messaging'][0]
                if (keys_exist(messaging_event,['message'])):
                    msg_txt   = messaging_event['message']['text']
                    sender_id = messaging_event['sender']['id']
                    print(sender_id)
                    first_word = msg_txt.split(" ")[0]
                    send_message(sender_id, msg_txt)
                else:
                    print("Did not send message")
                    pass
            else:
                print("Did not send message")
                pass

        else:
            pass
    except:
        pass

我在很多地方都给出了状态码200，但我不确定y仍然会遇到同样的问题。