Does R2 trust headers or does it recalculate Content-Length and Content-Type?

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For Workers & Pages, what is the name of the domain?

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What is the error number?

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What is the error message?

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What is the issue or error you’re encountering

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What steps have you taken to resolve the issue?

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What are the steps to reproduce the issue?

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Sorry but I really don’t understand how this forum work. I don’t have an issue, just a question.
I’m trying to build a general purpose upload endpoint in my company. My question is:
Does Cloudflare R2 makes sure the file being sent (using a presigned url) is the size and type it says it is? If not, how can I secure these types of endpoints to make sure my users don’t upload anything problematic (like a corrupted file)?
Thank you in advance and sorry for the misuse of your forum if that’s the case.

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