Spring Boot – How to solve OAuth2 REDIRECT_URI_MISMATCH

Table of Contents

• Introduction
• Solution
• Summary
• Next Steps

Introduction

When trying to authenticate a user using OAuth2 through a third-party service like (Google, Facebook .. etc.), the following error occurs:

Solution

redirect_uri_mismatch error occurs when the redirect URL defined for your application at the authorization service doesn’t match with the value of parameter “redirect_uri” passed by your request.

When integrating OAuth2 with Spring Boot, the default value of redirect_uri is set to “:/login”.

In order to solve this issue, you have 2 options:

1. Define “:/login” as a redirect URL under the authorization service.
2. Use a custom redirect URL through setting the following attributes in application.properties:

security.oauth2.client.preEstablishedRedirectUri=http://localhost:9090/callback
security.oauth2.client.useCurrentUri=false

In the above configuration we set a custom redirect URI as “http://localhost:9090/callback”.

Summary

When trying to authenticate a user using OAuth2 through a third-party service like (Google, Facebook .. etc.), the following error occurs:

Next Steps

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