Rename a WritableStream

[FloatingMind12]

Is there a way to rename a WritableStream after it has already been created and has data writen into?

[jimmywarting]

Nope.

You could only do this with the native file system access which is only available in Blink

[FloatingMind12]

Too bad. In that case, is it possible to copy a WritableStream's already writen data to a new one? Or would that need file system access as well?

[jimmywarting]

Uhm, you can't exactly copy a file after it have been writen. StreamSaver.js don't have any access what so ever to the disk. it acts more or less how a regular file is downloaded from a server. 1) You click on a link. 2) the thing can't be rendered, so it fallbacks to saving the response on the disk.

file name is adjusted with content-disposition attachment response header.

---

You could tee the stream and write it to two destinations. but you would have to create two downloads for it.

const dest1 = streamSaver.createWriteStream('a.txt')
const dest2 = streamSaver.createWriteStream('b.txt')

// Get a readable stream somehow, somewhere
const readable = new Response('foobar').body

// clone the stream
const [readable1, readable2] = readable.tee()

readable1.pipeTo(dest1)
readable2.pipeTo(dest2)

[FloatingMind12]

Thank you for the answer but that would defeat the purpose of renaming the stream. The only way left I can think of then is to create some kind of server apps that would have access to local files and make it communicate with the script running on the browser.