How to encode/decode correctly using NetSuite file upload in Suitelet

In your code, I see you're uploading the data in the 'decodedStr', which is defined via 'var decodedStr = toBase64(fileContents);'. That seems like it may be the opposite of what you want to do though. The Dropbox API does not expect the uploaded data to have a layer of base64 encoding and will not automatically undo any such layer set by the client. Further, it looks like the original contents in 'fileContents' may already be base64-encoded, so "toBase64" may be the wrong thing to do anyway. Did you perhaps mean to implement and use a "fromBase64" instead? (That would also make more sense given the variable name 'decodedStr'.)