Reply 357820 to: Something is wrong with Google OAuth2. redirect_uri_mismatch
Tony Rodriguez
Support staff
May 27, 2023 at 05:11
Hello, @Dee,
The “redirect_uri_mismatch” error is a common error that occurs in OAuth 2.0 authentication when the redirect URL specified in the authorization request does not match the redirect URL registered with the OAuth provider.
Here are a few possible reasons for this error:
1. Incorrect Redirect URL: The redirect URL you provided in the authorization request doesn’t match the one registered with the OAuth provider. The redirect URL must be an exact match, including the protocol (http/https) and the full path.
2. URL Encoding Issues: If your redirect URL contains query parameters, make sure they are properly URL-encoded. Any special characters or reserved characters in the URL should be encoded according to the URL encoding rules.
3. HTTPS/HTTP Mismatch: Some OAuth providers require the redirect URL to use a specific protocol (e.g., HTTPS). If the provider expects an HTTPS redirect URL, make sure you’re using it correctly.
4. Dynamic Redirect URL: If you are dynamically generating the redirect URL, ensure that the dynamic part of the URL is consistent throughout the authentication process. Any changes to the URL between the authorization request and the token request can result in a redirect URL mismatch error.
5. Subdomain Mismatch: Some OAuth providers enforce subdomain matching, meaning that the subdomain in the redirect URL must match the one registered with the provider. For example, if you registered “example.com” with the provider, the redirect URL should be something like “https://example.com/auth/callback” rather than “https://www.example.com/auth/callback”.
To resolve the “redirect_uri_mismatch” error, double-check the redirect URL you are using, compare it with the registered URL, ensure proper encoding, and verify protocol and subdomain matching. If necessary, update your OAuth provider configuration with the correct redirect URL.
