从App Engine运行时Python 3.7调用Cloud Function [英] Calling Cloud Function from App Engine runtime Python 3.7

问题描述

我有一个运行Python 3.7的App Engine服务，需要通过https.oncall触发器调用我的一个Cloud Functions并获取响应.

I have an App Engine service, running Python 3.7, that needs to call and get a response from one of my Cloud Functions via the https.oncall trigger.

我认为我可以通过以下方式做到这一点:

I thought I could do so with the following:

import logging
from sys import exit

import firebase_admin

import requests

import google.cloud.logging
client = google.cloud.logging.Client()
client.setup_logging()

firebase_admin.initialize_app()

response = requests.post("https://us-central1-myproject.cloudfunctions.net/functionname", data={"foo": "bar"})

if response.status_code != 200:
    exit("Could not call function! :(") # This is happening

logging.info(f"Yay! Here is the result: {response.text}")

# do something else

exit()

但是，我从Cloud Functions获得Request has incorrect Content-Type..

However, I'm getting Request has incorrect Content-Type. from Cloud Functions.

我已经尝试过各种请求语法的变体，例如:data='{"foo": "bar"}'和data=json.dumps({"foo": "bar"})，但是我能得到的只是Request has incorrect Content-Type.或Request has incorrect Content-Type. application/x-www-form-urlencoded.

I've tried multiple variations on the request syntax such as: data='{"foo": "bar"}' and data=json.dumps({"foo": "bar"}) but all I can get back is either Request has incorrect Content-Type. or Request has incorrect Content-Type. application/x-www-form-urlencoded.

如何正确地将字典附加到我的请求上，以使函数以application/json的形式接收字典，如 ?

How do I properly attach my dictionary to my request so that the function receives it in the form of application/json as noted in the Cloud Function docs?

我读过其他文章，建议使用json.dumps()函数会告诉request使用application/json，但是Cloud Functions对此并不满意.

I've read other posts that suggest using the json.dumps() function will tell request to use application/json but Cloud Functions wasn't happy about it.

推荐答案

您没有为您的请求设置Content-Type.从requests==2.4.2开始，您可以改用json参数传递字典并自动设置Content-Type:

You're not setting the Content-Type for your request. Starting with requests==2.4.2, you can use the json parameter instead to pass a dictionary and automatically set the Content-Type:

requests.post(url, json={"foo": "bar"})

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