Resolving csrf token mismatch Errors in Laravel Ajax Calls

Learn how to troubleshoot and fix the common `csrf token mismatch` error in Laravel when making Ajax calls. This guide offers insights and solutions for seamless form submissions. --- This video is based on the question https://stackoverflow.com/q/74182166/ asked by the user 'moussa' ( https://stackoverflow.com/u/16455484/ ) and on the answer https://stackoverflow.com/a/74195553/ provided by the user 'moussa' ( https://stackoverflow.com/u/16455484/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions. Visit these links for original content and any more details, such as alternate solutions, latest updates/developments on topic, comments, revision history etc. For example, the original title of the Question was: csrf token mismatch even token exist Also, Content (except music) licensed under CC BY-SA https://meta.stackexchange.com/help/licensing The original Question post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/by-sa/4.0/ ) license, and the original Answer post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/by-sa/4.0/ ) license. If anything seems off to you, please feel free to write me at vlogize [AT] gmail [DOT] com. --- Resolving csrf token mismatch Errors in Laravel Ajax Calls Handling Ajax requests in Laravel is a common task for developers, but sometimes you may run into issues that can be frustrating—such as the dreaded csrf token mismatch error. This error can be perplexing, especially if you've ensured that your CSRF token is included. In this post, we'll explore why this error occurs and how to effectively resolve it. Understanding the CSRF Token What is CSRF? CSRF stands for Cross-Site Request Forgery. It's a security mechanism used to prevent unauthorized commands being transmitted from a user that the web application trusts. Laravel integrates CSRF protection by requiring a token to validate requests, ensuring that the form submission is intended. How CSRF Tokens Work Token Generation: When a user requests a form, Laravel generates a unique CSRF token. Token Inclusion: This token should be included in any post requests that modify server state (like form submissions). Token Validation: Upon receiving a request, Laravel checks the token. If it doesn't match what's expected, a csrf token mismatch error is thrown. The Problem: csrf token mismatch The Issue You may encounter a "csrf token mismatch" error message even if you're including the token correctly in your Ajax call. This can leave you puzzled, especially when you have structured your Ajax request carefully. Example Code Here's an example of a basic HTML structure where you might face this issue: [[See Video to Reveal this Text or Code Snippet]] The Solution: Fixing the csrf token mismatch Step 1: Check Middleware Starting with Laravel 9, one common oversight is regarding the CSRF verification middleware. You need to ensure that your routes which handle Ajax requests are included in the CSRF verification middleware. Adding Routes to Middleware To add your route to the CSRF verification middleware, follow these steps: Open Middleware File: Navigate to app/Http/Middleware/VerifyCsrfToken.php. Add Exemption Routes (if needed): If certain routes should be excluded from CSRF verification, add them to the $except array. Here’s an example: [[See Video to Reveal this Text or Code Snippet]] Check Your Routes: Ensure that the route for your Ajax call /newsletter is not excluded unless intentionally required. Step 2: Include CSRF Token in Your Request When sending your Ajax request, ensure that the CSRF token is being sent correctly. You can either include it as part of the data sent in the request or properly set it in the headers. Step 3: Test Your Changes After updating your routes and ensuring the CSRF token is correctly placed: Refresh your page. Open your browser's console. Trigger the Ajax call again to see if the csrf token mismatch error persists. Conclusion Encountering a csrf token mismatch error can be frustrating but understanding the role of CSRF tokens in Laravel can help alleviate much of the confusion. By ensuring that your endpoints are configured correctly and that your token is being transmitted properly, you can effectively tackle this issue. If you continue to experience problems, double-check your routes, Ajax implementation, and middleware configurations for any overlooked elements. Happy coding!