Data Type Mismatch and Policies must be valid JSON and the first byte must be '{'

Question

I need to make a CORS Policy for my S3 Bucket.

In the console, it says the policy has to be valid JSON. I copy and paste their examples and immediately it errors stating they're formatted improperly. This is basically what I'm trying:

[
    {
        "AllowedHeaders": [
            "*"
        ],
        "AllowedMethods": [
            "POST"
        ],
        "AllowedOrigins": [
            "https://localhost:3000",
            "https://mywebsite.com",
        ]
    }
]

Apparently something is wrong:

@Paolo https://s3.console.aws.amazon.com/s3/bucket//property/policy/edit?region=us-east-1 — David, Sep 20 '22 at 19:19
Even weirder, I get the CORS issue, but then the upload is successful and file is in S3... — David, Sep 20 '22 at 19:20
The setting should be under Permissions then -> origin resource sharing (CORS). Is that where you specified it? — Paolo, Sep 20 '22 at 19:21

score 1 · Accepted Answer · answered Sep 20 '22 at 19:27

1

The CORS policy is a standalone policy that needs to be specified in the origin resource sharing (CORS) for the bucket. You need to enter the policy that you have there.

answered Sep 20 '22 at 19:27

Paolo

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Data Type Mismatch and Policies must be valid JSON and the first byte must be '{'

1 Answers1