CORS, or Cross-Origin Resource Sharing, is a mechanism that allows a web page to make requests to a different domain than the one that served the web page. It is a browser-based mechanism that uses HTTP headers to give a web application running at one origin (domain) access to selected resources from a different origin. This is useful for integrating web applications that need to access resources from third-party domains. CORS is not a protection against cross-origin attacks such as cross-site request forgery (CSRF), but it enables controlled access to resources located outside of a given domain
. CORS works by using specific HTTP headers to allow or deny access to a
resource. For example, a server can include an Access-Control-Allow-Origin
header in its response to indicate which origins are allowed to access the
resource. If the requesting origin is not on the list, the browser will block
the resource from being accessed
. In summary, CORS is a security feature implemented in web browsers that controls which web pages or web applications can access resources from other origins. It is essential for enabling secure and controlled interaction between different web domains.
