Operate limited shared Google Calendar with Lambda (Python) [cloudpack Osaka]

It's a memorandum because I was sick. Operate the Google calendar that is shared exclusively with Lambda (Python). _ I did it at work, but I will deliver the tragedy that Google's library was updated one week before the start, the fastest in Japan. _

Required library

Below, please put in with pip

• httplib2
• oauth2client
• google-api-python-client
• pyCrypto

Creating a service account

In order to access Google Calendar, you need to create an authentication user called a service account.

Access API Manager from the Google Developer Console (https://console.developers.google.com/).

Enable Calendar API.

Go to "Credentials" from "API Manager" and create a service account key.

Please enter your name and service account ID. You will use the service account ID later. Also, this time specify the key type p12.

Since the p12 file is DL, convert it to pem openssl pkcs12 -in key.p12 -nodes -nocerts > key.pem

Calendar sharing settings

Add the service account you created to the Google Calendar shared users. I was addicted to the official documentation because I couldn't find the description here. There was a description like how to spoof the user, but it seems that it can not be operated unless it is added.

1. "Settings" from the gear on the upper right of Google Calendar
2. Select the "Calendar" tab and go to "Share: Edit Settings"
3. Add the service account you just created

Source code

import httplib2
from apiclient import discovery
import oauth2client
from oauth2client.service_account import ServiceAccountCredentials
from datetime import datetime as dt

SERVICE_ACCOUNT_ID = "[email protected]" #Acquired service account

def lambda_handler(event, context):
    credentials = get_credentials()
    http = credentials.authorize(httplib2.Http())
    service = discovery.build(
        'calendar',
        'v3',
        http=http
    )

    events = service.events().list(calendarId=CALENDAR_ID).execute()

    return events.get('items', [])


def get_credentials():
    scopes = 'https://www.googleapis.com/auth/calendar'
    credentials = ServiceAccountCredentials.from_p12_keyfile(
        SERVICE_ACCOUNT_ID,
        'key.pem',
        scopes=scopes
    )

    return credentials

After that, it's okay if you upload it to Lambda as lambda-uploader or compress it yourself!