Authoritative guide to CORS (Cross-Origin Resource Sharing) for REST APIsAn in-depth guide to Cross-Origin Resource Sharing (CORS) for REST APIs, on how CORS works, and common pitfalls especially around security. What is CORS? CORS is a security mechanism that allows a web page from one domain or Origin to access a resource with a different domain (a cross-domain request). CORS is a relaxation of the same-origin policy implemented in modern browsers. Without features l
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