If you're using Access-Control-Allow-Credentials with your CORS request you'll want the cors header wiring within your location to resemble this.Īs the origin has to match the client domain, wildcard doesn't work. The value of this header is a comma-ĭelimited list of response headers you want to expose to the client. If you want clients to be able to access other headers, you have to use theĪccess-Control-Expose-Headers header. So remove these headers from your frontend code. It doesn't make sense for the client to give itself permission.

NET Core 2.0 'No Access-Control-Allow-Origin header is present on the requested resource. The server is 'allowing' the client to send certain headers. The Access-Control-Allow-Origin header contains multiple values, 9 CORS in. Simple response headers are defined as follows: Anytime you see a Access-Control-Allow- header, those should be sent by the server, NOT the client. During a CORS request, the getResponseHeader() method can only access GetResponseHeader() method that returns the value of a particular response Access-Control-Expose-Headers (optional) - The XMLHttpRequest 2 object has a Resolution Confirm the origins cross-origin resource sharing (CORS) policy allows the origin to return the Access-Control-Allow-Origin header Configure the. If an opaque response serves your needs, set the request's mode to 'no-cors' to fetch the resource with CORS disabled. Origin 'null' is therefore not allowed access. You may also wish to add Access-Control-Expose-Headers (in the same format as Access-Control-Allow-Headers) in order to expose your custom and/or 'non-simple' headers to ajax requests. No 'Access-Control-Allow-Origin' header is present on the requested resource. # Tell client that this pre-flight info is valid for 20 daysĪdd_header 'Access-Control-Max-Age' 1728000 Īdd_header 'Content-Type' 'text/plain charset=UTF-8'

# Custom headers and headers various browsers *should* be OK with but aren'tĪdd_header 'Access-Control-Allow-Headers' 'DNT,X-CustomHeader,Keep-Alive,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type' Add_header 'Access-Control-Allow-Origin' '*' Īdd_header 'Access-Control-Allow-Credentials' 'true' Īdd_header 'Access-Control-Allow-Methods' 'GET, POST, OPTIONS'

No 'access control allow origin' header