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CORS In AWS S3

What Is CORS?

Why Do We Need To Enable CORS In S3?

CORS JSON

[
    {
        "AllowedHeaders": [
            "*"
        ],
        "AllowedMethods": [
            "PUT",
            "POST",
            "DELETE"
        ],
        "AllowedOrigins": [
            "http://www.example1.com"
        ],
        "ExposeHeaders": []
    },
….
]

1. AllowedHeaders → This attribute specifies which headers are allowed in preflight CORS requests. The preflight CORS request checks if the CORS protocol is understood between the website and the resource on the other domain
2. AllowedMethods → This attribute specifies which HTTP methods are allowed while performing the HTTP request
3. AllowedOrigins → This attribute specifies the domain where the resource is stored
4. ExposeHeaders → This attribute specifies which headers are exposed to the client in the HTTP response

How To Enable CORS In S3?