[FEATURE] support large files

[sokoow]

Description

Support large files - currenctly when I try to upload anything more than > 40 megs, my browser would hang with SIGILL . Is it possible to support files larger than 1GB?

Screenshots

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Additional information

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[bjarneo]

Did not see this one until now. So, that is a great question. Since the encryption is done by tweetnacl in the browser, it is using browser resources. I have to play around and test to see what is possible or not. Find the bottleneck.

[bjarneo]

It requires a lot of refactoring to make this work.

By default everything was base64 encoded (after the encryption to make it easy to post to the server), which works fine for normal text, but not large files

What has to be done is

1. use this API in the zip.js file: reader.readAsArrayBuffer(file); (place it next to new FileReader()
2. Remove encode base64 from zipFiles function
3. Update both encrypt and decrypt in the crypto.js file to not use base64encode or decode for files
4. It has to be handled differently by the upload, currently it is stringified form data added to a POST request in the api/secrets.js#createSecret() function
5. Handle streaming of large files to the server in a fine way

So, TL;DR: The current file handling is very bad, and to support large files, it requires a lot of work, but, should definitely be done at some point.