Google OAuth 2 authorization - swapping code for token

Question

I\'m trying to implement Google OAuth 2 to get access to Google APIs. I follow this guide, using server-side scenario.

I have no problem with getting the code, serve

Answer 1

I had the same error until I realized that I was trying to connect with a client ID which I created for iOS. So for me the solution was to create a new API key-secret pair on the API Console with the platform set to "other".

Now I'm getting other errors but that's another story. ;)

Answer 2

Did you urlencode your client secret and redirect url? That works for me.

Should be http%3A%2F%2Flocalhost instead of https://localhost.

Answer 3

Happens when you use wrong Client secret. Make sure you are using correct Client secret from Google API console. I was using Email address since API console displays the information in the following order:

1. Client ID
2. Email address
3. Client secret