CORS (Cross-Origin Resource Sharing)

CORS (Cross-Origin Resource Sharing) is a system, consisting of transmitting HTTP headers, that determines whether to block or fulfill requests for restricted resources on a web page from another domain outside the domain from which the resource originated. The same-origin security policy forbids 'cross-domain' requests by default. CORS gives web servers cross-domain access controls, which enable secure cross-domain data transfers.

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