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Asked: 2026-05-29T19:37:52+00:00

With the open source project google-api-ruby-client , I’m trying to run the OAuth 2.0

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With the open source project google-api-ruby-client, I’m trying to run the OAuth 2.0 sample calendar.rb, which will access Google Calendar API.
I’ve created client ID in Google API console, and fill the client ID and the secret in the ruby script.

However, after I run the ruby script 

ruby calendar.rb

and then open http://localhost:4567, the browser return error information from Google to me:

Error: redirect_uri_mismatch
The redirect URI in the request: http://localhost:4567/oauth2callback did not match a     registered redirect URI

I checked the information in the Google API console:

Redirect URIs:  https://localhost/oauth2callback
JavaScript origins: https://localhost

What’s the problem and how to solve it? Thanks in advance.

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1 Answer

  1. Editorial Team

    The redirect URI has to match exactly. You can’t omit anything. You’ve dropped the port number. But mismatching a trailing slash or really anything else will cause this error. It has to be an exact, character-for-character match.

    The two values should be:

    Redirect URIs: https://localhost:4567/oauth2callback

    JavaScript origins: https://localhost:4567

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