Pre-signed URLs & CORS on Cloudflare R2

AllowedHeaders: [“content-type”], // Don’t use * — it won’t work!
AllowedMethods: [“PUT”],
AllowedOrigins: [“*”] // You can make this more specific

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Get the Medium app

A button that says 'Download on the App Store', and if clicked it will lead you to the iOS App store
A button that says 'Get it on, Google Play', and if clicked it will lead you to the Google Play store