Halloween Kissa

How to Fix Blogger OAuth2 Error: redirect_uri_mismatch

Overview

The redirect_uri_mismatch error occurs when the redirect URI specified in the OAuth 2.0 request does not match the redirect URI specified when registering the application.

Causes

The most common causes of this error are:

• Typos or incorrect formatting in the redirect URI.
• Using a different redirect URI than the one specified in the app registration.

Solutions

To fix this error, follow these steps:

1. Check for any typos or incorrect formatting in the redirect URI specified in the OAuth 2.0 request and the app registration.
2. Ensure that the redirect URI specified in the OAuth 2.0 request matches the redirect URI specified when registering the application.
3. If the redirect URI is correct, check if any security restrictions or firewalls are blocking the redirect.
4. Try revoking and re-granting access to the application.

Additional Tips

Here are some additional tips to help you avoid this error:

• Use a consistent redirect URI throughout the OAuth 2.0 flow.
• Test the OAuth 2.0 flow thoroughly to ensure that it works as expected.
• Be aware of any security restrictions or firewalls that may be blocking the redirect.

Conclusion

By following the steps outlined in this guide, you can fix the redirect_uri_mismatch error and successfully complete the OAuth 2.0 flow.