getting bytes as a stream/flow in common code

[nxoim]

it would be nice to have an alternative to file.readBytes() in common code that returns a Flow<ByteArray> , in which each emmission is a chunk of data

[vinceglb]

Hi @nxoim! Thanks for creating this issue.

I'm currently working on a big update of FileKit. In the next version, PlatformFile on Android, Apple targets and JVM will be fully compatible with kotlinx-io. This way, it will be possible to read and write files like you want.

Here is an extension that we will soon be able to do:

public fun PlatformFile.asByteArrayFlow(chunkSize: Long): Flow<ByteArray> = flow {
    val source = source() ?: return@flow

    source.use { bufferedSource ->
        val buffer = Buffer()
        while (true) {
            // Read up to chunkSize bytes into the buffer
            bufferedSource.readAtMostTo(sink = buffer, byteCount = chunkSize)
            if (buffer.size == 0L) break // End of stream

            // Emit the contents of the buffer
            emit(buffer.readByteArray())

            // Clear the buffer for the next iteration
            buffer.clear()
        }
    }
}

If you want to try the next version of FileKit now, it's possible. I'm still working on it and moving things around. Also, there are some breaking changes with previous versions.

In your settings.gradle.kts

dependencyResolutionManagement {
    repositories {
        // ...
        maven("https://s01.oss.sonatype.org/content/repositories/snapshots/") // Add this line
    }
}

In your build.gradle.kts, the package names have been changed. Also, update the version to 0.10.0-SNAPSHOT.

// io.github.vinceglb:filekit-core is now:
implementation("io.github.vinceglb:filekit-dialog:0.10.0-SNAPSHOT")

// io.github.vinceglb:filekit-compose is now:
implementation("io.github.vinceglb:filekit-dialog-compose:0.10.0-SNAPSHOT")

In your code, when you call FileKit classes, you'll probably need to fix the imports. Things are called almost as before.

Here are some interesting files you can look at to understand how you can integrate with:

• PlatformFile common
• PlatformFile nonWeb

The samples are updated if you want to see some examples:

• sample-core
• sample-compose

If you have any questions or comments, don't hesitate!

[nxoim]

Here is an extension that we will soon be able to do

this was INSANELY helpful, thank you so much. works great on android, have not tested on other platforms yet