Amazon S3 – How to fix ‘The request signature we calculated does not match the signature’ error?

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After two days of debugging, I finally discovered the problem…

The key I was assigning to the object started with a period i.e. ..\images\ABC.jpg, and this caused the error to occur.

I wish the API provides more meaningful and relevant error message, alas, I hope this will help someone else out there!

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