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Ben McClelland
0e165edfb1
The object info modal in the WebUI was always displaying STANDARD as the
storage class regardless of the actual value. The root cause is a browser
CORS restriction: when the WebUI makes a cross-origin HEAD request to the
S3 endpoint, the browser silently drops any response header not listed in
Access-Control-Expose-Headers, causing response.headers.get('x-amz-storage-class')
to return null and the UI to fall back to the hardcoded STANDARD default.
Adding x-amz-storage-class to the default set of exposed headers ensures
the browser makes it available to JavaScript, allowing storage classes such
as GLACIER to be correctly reflected in the UI.