It's way too hard to figure out how to use unstable_parseMultipartFormData to get a file contents?

[tmcw]

So, I'm trying to write an action that can receive an uploaded text file, read the text in the file, and parse that text. I've found the documentation for that and gotten the File object, but the docs say:

Would be useful to understand the Browser File API to know how to use this API.

And I am underwhelmed by that level of explanation. I've used the Browser File API a ton and understand it fairly deeply. But this obviously isn't that. Like - I have this File object, so traditionally I'd use a FileReader to read it. But Remix doesn't polyfill FileReader or provide it as an export. So the contents of this file remain elusive to me, and the documentation doesn't really help me solve that puzzle: the MDN docs aren't useful if you don't have the tools described in the MDN docs.

The docs for the memoryHandler upload handler don't help either - again, they just link to MDN, which reminds us that File contents are opaque without FileReader.

So, digging through the code I figure out that the File polyfill is from https://github.com/remix-run/web-std-io - reading through that code you arrive at File.stream(). Which is a great API! And a fresh one… so fresh that it's not listed on the MDN page 😆

[akomm]

A File is also a Blob. It provides the following API:

You can work with it differently, whatever you want to do with it, even actually read the plain text.