For details on the effect of each CORS header, read this article on web.dev. In the configuration file I have the same address that I use for the query. origin : Configures the Access-Control-Allow-Origin CORS header. When used as part of a response to a pre-flight request, this indicates whether or not the actual request can be made using credentials.When using an API request from my forum to display posts on an external site, I got this message in the logs. A boolean indicating whether or not the response to the request can be exposed to the browser.I have been getting these errors on my browser when I try to make a put request to localhost:8080 Cross-Origin Request Blocked: The Same Or. List of method parameters indicating which HTTP methods can be used when making the actual request. I am building a react application on top of spring boot. List of header parameters indicating which HTTP request headers can be used when making the actual request.A seconds parameter indicating how long the results of a pre-flight request can be cached. If setting these headers on all requests, this essentially disables CORS protection entirely, which is not a good idea since CORS exists to protect your users from a third party triggering requests on their behalf.The values in the list (header names) are then made accessible to the browser without it, those headers are not readable by the browser. For CORS requests (not pre-flight), if not empty these values are copied into the Access-Control-Expose-Headers response header. List of header parameters indicating response headers that browsers are allowed to access.List of regexp regular expressions specifying resource paths for which the policy applies.Different origins tend to have different life-cycles and requirements, thus benefitting from clear separation. It is generally recommended to have separate policies for each specific origin hostname, using alloworigin, even if that means repeated configuration of the other policy properties. Regular expressions can lead to unintended matches if not carefully built, allowing an attacker to use a custom domain name that would also match the policy. Allows a server to explicitly allow some cross-origin requests while rejecting others. For more information, see How CORS works. Is not a security feature, CORS relaxes security.
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