问题
I'm writing a Lambda function that queries Google Calendar events. Although I successfully created a credential (client ID, and client secret) on Google Developers Console, I cannot access the events. Error:
{ "error": { "errors": [{ "domain": "usageLimits", "reason": "keyInvalid", "message": "Bad Request" } ], "code": 400, "message": "Bad Request" } }
My http request looks like this: https://www.googleapis.com/calendar/v3/calendars/MY_CLIENT_ID/events?key=MY_CLIENT_SECRET
What went wrong? Any help is greatly appreciated.
回答1:
"domain": "usageLimits", "reason": "keyInvalid", "message": "Bad Request"
Means that the key you are sending is an invalid api key.
Background info
When you make a request to a Google api for public data you can use an API key. Public data is data that is not owned by a user. For example public posts on google+, google books. In these instances you can use an api key inorder to access the api using
GET https://www.googleapis.com/youtube/v3/search?part=snippet&maxResults=25&q=surfing&type=test&key={YOUR_API_KEY}
key identifies your application to google using the api key you create in google developer console.
Private data is data that is owned by a user for instance your google calendar an application can not post to it with out permissions. Inorder to do this we use Oauth2. You create a client on google developer console then login the user using oauth2. you will get an access token back then you can make a request
https://www.googleapis.com/calendar/v3/calendars/MY_CLIENT_ID/events?accesstoken=ACCESSTOKEN
Notice that the first request used key and the second used accesstoken.
Anwser
Your problem is that you are sending a client secret as an api key which will not work because first of all a client secret is not an api key and second events are private user data which will require that you authenticate your user first.
来源：https://stackoverflow.com/questions/48745939/keyinvalid-error-when-calling-google-calendar-api