Handling CORS issues in a PHP REST API with Symfony 5
I'm having trouble with I'm testing a new approach and I'm working on a project and hit a roadblock... Currently developing a REST API using Symfony 5, and I need to enable CORS for my frontend application. I’ve configured the `nelmio/cors-bundle`, but it seems like my settings aren’t applied correctly on production. In my `config/packages/nelmio_cors.yaml`, I have the following configuration: ```yaml nelmio_cors: paths: '^/api/': allow_origin: ['*'] allow_headers: ['Content-Type', 'Authorization'] allow_methods: ['GET', 'POST', 'PUT', 'DELETE', 'OPTIONS'] max_age: 3600 ``` Despite this, when I try to make a request from my frontend application, I still receive the following error in the browser console: ``` Access to XMLHttpRequest at 'https://myapi.com/api/resource' from origin 'https://myfrontend.com' has been blocked by CORS policy: No 'Access-Control-Allow-Origin' header is present on the requested resource. ``` I’ve validated that the configuration file is being loaded properly and even cleared the cache using `php bin/console cache:clear`. I also checked that my server (Nginx) is not interfering with the headers by adding this to my site config: ```nginx location /api/ { add_header 'Access-Control-Allow-Origin' '*'; add_header 'Access-Control-Allow-Headers' 'Content-Type, Authorization'; add_header 'Access-Control-Allow-Methods' 'GET, POST, OPTIONS, DELETE, PUT'; if ($request_method = 'OPTIONS') { add_header 'Access-Control-Allow-Origin' '*'; add_header 'Access-Control-Allow-Methods' 'GET, POST, OPTIONS, DELETE, PUT'; add_header 'Access-Control-Allow-Headers' 'Content-Type, Authorization'; return 204; } } ``` Even with these configurations, I still run into the CORS issue. It’s puzzling since everything works fine in my local environment. I’ve also tried checking the network tab in my browser’s developer tools, and it looks like the OPTIONS preflight requests are hitting the server but not returning the correct headers. Is there something I might be missing in my Symfony configuration or Nginx setup? Any guidance on how to resolve this CORS issue efficiently would be greatly appreciated. Could someone point me to the right documentation?