getFile download progress

[henninghorn]

I found the undocumented (#220) progressHandler parameter you can use to display the progress when uploading a file.
I can't seem to find a way to track the progress of downloading a file.

This would be very useful when downloading large files.

Is it possible to get some sort of download progress currently in any way?

[j-berman]

Would need to implement this, just like uploadFile! The implementation would be similar to the uploadFile implementation described in #220 (PR's #221 and #225 show the code). Bandwidth to work on it is super slim at the moment unfortunately, but if you're willing, happy to review a PR and get it through!

Btw thank you for the PR to add it to the documentation for uploadFile. Touched it up a tiny bit here

[j-berman]

Technically you could also just get the file in byte ranges using the range param, and with each iteration, log the progress, like this:

const CHUNK_SIZE = 512 * 1024
let position = 0

while (position < file.size) {
   const chunkResult = await userbase.getFile({ databaseName, fileId, range: { start: position, end: position + CHUNK_SIZE } })
   const bytesRetrieved = position + chunkResult.file.size
   const progress = bytesRetrieved / file.size
   console.log(progress)
   
   // you'll also want to place the chunk in an array, and then rebuild the file when the while loop finishes

   position += CHUNK_SIZE
}