I created the middleware.js file at config folder as it says in the documentation : module. Otherwise, make a preflight request. Another method type (such as GET, PUT, or POST) isn't configured to return the required CORS headers. When I tried to send a request with Axios, there is this problem :Īccess to XMLHttpRequest at ‘ http address’ from origin ‘ has been blocked by CORS policy: Response to preflight request doesn’t pass access control check: No ‘Access-Control-Allow-Origin’ header is present on the requested resource. CORS preflight request uses HTTP OPTIONS without credentials, see Cross-Origin Resource Sharing. Note: The No 'Access-Control-Allow-Origin' header present error can occur for any of the following reasons: The API isn't configured with an OPTIONS method that returns the required CORS headers. Is there any way to explicitly tell axios not to ask for this header in the preflight request. I cant ensure they send the Authorization header. Strapi is on my online server, and I run React app on my local computer. Unfortunately, I cant work around it since I dont have any control over the API server I am calling. I created a React app using Strapi for backend and I don’t understand how to setup CORS policy. Answer by Gatlin Houston Pertinent id values in the source code are colored red and pertinent JavaScript function names are colored blue. If you are using a non-authenticated endpoint, Access-Control-Allow-Origin '' is fine (though not recommended), but for authenticated endpoints star is not fine. This is a request that uses the HTTP OPTIONS verb and includes several headers, one of which being Access-Control-Request-Headers listing the headers the client wants to include in the request. There should be an option to enable/disable this. When you start playing around with custom request headers you will get a CORS preflight. The value of Access-Control-Allow-Headers should be a comma-delineated list of header names, such as 'X-Custom-Information' or any of the standard but non-basic header names (which are always allowed). Axios is sending the Authorization header in preflight requests, which it shouldnt. My react code: axios.Problem about CORS policy : HELP Description The Access-Control-Allow-Headers header is sent by the server to let the client know which headers it supports for CORS requests. P://localhost/todo/laravel/public/api/test' from origin ' has been blocked by CORS policy: No 'Access-Control-Allow-Origin' header is present on the requested resource. Update Access-Control-Allow-Origin is a response header - so in order to enable CORS - you need to add this header to the response from your server. Access-Control-Allow-Headers: Content-Type, Origin, Accept,Authorization,Content-Length. but cors prevent laravel to answer my request. Handle preflight OPTIONS requests automatically with Mockoon. I am using axios on react to send http request to laravel backend.
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