问题描述
与先前的SO query类似，我有一个侦听POST的webhook接收器。我将WhatsApp消息发送到我的Twilio号码，将Twilio POST发送到webhook接收者，服务器代码处理请求，然后将响应对象返回给Twilio。该代码从Airtable的事件日历中提取了一些项目，并应通过Twilio将它们发送到WhatsApp。
webhook使用Postman测试OK。但是，WhatsApp不会返回POST请求的结果，并且我从Twilio调试器收到以下警告：
sourceComponent "14100"
line "1"
ErrorCode "12200"
LogLevel "WARN"
Msg "Content is not allowed in prolog."
EmailNotification "false"
parserMessage "Content is not allowed in prolog."
cols "1"
我的完整代码在这里：
from flask import Flask,request
import requests
import json
from airtable import Airtable
from datetime import datetime
from twilio.twiml.messaging_response import MessagingResponse
base_key = 'BASE_KEY'
table_name = 'Events Calendar'
api_key = 'API_KEY'
airtable = Airtable(base_key,table_name,api_key)
API_URL = "https://api.airtable.com/v0/BASE_KEY/Events%20Calendar?maxRecords=3&filterByFormula=IS_AFTER(%7BDate%7D,NOW())"
headers = {
"Authorization": "Bearer API_KEY"
}
app = Flask(__name__)
@app.route('/bot',methods=['POST'])
def accessdb():
incoming_msg = request.values.get('Body','').lower()
resp = MessagingResponse()
msg = resp.message()
responded = False
if 'next' in incoming_msg:
def pretty(d):
date = datetime.strptime(d["Date"],"%Y-%m-%dT%H:%M:%S.%fZ")
return f'''Date: {date.strftime("%A,%d. %B %Y %I:%M%p")}
Title: {d['Title']}
Description: {d['Description']}
'''
pages = airtable.get_iter(maxRecords=3,formula="Date >= NOW()",sort=["Date"],fields=('Date','Title','Description'))
mylist = []
for page in pages:
for record in page:
if 'fields' not in record:
continue
fields = record['fields']
mylist.append(pretty(fields))
return "\n".join(mylist)
elif 'what' in incoming_msg:
msg.body("Please enter 'next' to get the next events.")
responded = True
elif not responded:
msg.body("I don't know about that,sorry!")
return str(resp)
if __name__ == '__main__':
app.run()
以上代码已部署到Heroku中，我可以使用curl或Postman调用webhook并成功产生以下结果：
Date: Wednesday,07. October 2020 06:00PM
Title: Social Distancing Dance Party: Slow Motion
Description: Slow Motion is the yang to the Saturday Dance Party's yin
Date: Thursday,08. October 2020 08:00AM
Title: Free Online Meditation Mornings
Description: 20-30 minute meditation. Donations can be made at https://example.com
Date: Saturday,10. October 2020 07:00PM
Title: Social Distancing Dance Party
Description: A party in your very own kitchen
但是从Twilio调用webhook会产生先前给出的错误。
早期的SO答案建议按以下方式返回查询结果：return twilioResponse.ToString()
我对语法没有把握，并尝试了以下方法：
for page in pages:
for record in page:
if 'fields' not in record:
continue
fields = record['fields']
mylist.append(pretty(fields))
return "\n".join.twilioResponse.ToString(mylist)
但是，当我尝试上述操作时，失败如下：
return "\n".join.twilioResponse.ToString(mylist)
AttributeError: 'builtin_function_or_method' object has no attribute 'twilioResponse'
在正确的方向上轻推将不胜感激。预先非常感谢。
解决方法
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