Hey guys, how can I achieve this with Ktor? Code ...

# ktor

[Hristijan]

Hey guys, how can I achieve this with Ktor?

Code in thread

[Hristijan]

fun downloadGzipTo(
context: Context,
dlUrl: String,
destinationUri: Uri
) {
val url = URL(dlUrl)
val urlConnection = url.openConnection() as HttpURLConnection
val inputStream = GZIPInputStream(urlConnection.inputStream)

val outputStream = context
.contentResolver
.openOutputStream(destinationUri)
?: throw RuntimeException("Failed to open output stream for Uri: $destinationUri")

inputStream.use {
it.copyTo(outputStream)
}

// Clean up resources
outputStream.close()
}

[Aleksei Tirman [JB]]

Here is an example of how to stream gzipped response body to the output stream:

val client = HttpClient(Android) {
    install(ContentEncoding) {
        gzip()
    }
}
val outputStream = ByteArrayOutputStream() // For example
client.prepareGet("<https://httpbin.org/gzip>").execute { response ->
    val inputStream = response.bodyAsChannel().toInputStream()

    inputStream.use {
        it.copyTo(outputStream)
    }
    // Clean up resources
    outputStream.close()
}

[Hristijan]

Thank you

[Hristijan]

Is it possible to have this as multiplatform solution or gzip is jvm only?

[Aleksei Tirman [JB]]

It's possible since the ContentEncoding plugin is multiplatform. The only part of the code that needs rewriting is where the InputStream and OutputStream are used.

[Hristijan]

ContentEncoding is multiplatform, my question was about gzip() , sorry

[Aleksei Tirman [JB]]

The gzip() configuration method is multiplatform too.

[Hristijan]

How would I go about migrating InputStream and OutputStream to KMP, sorry i’m new to this and i couldn’t find any documentation online

[Aleksei Tirman [JB]]

It depends on platforms you want to target.

[Hristijan]

iOS and Android

[Aleksei Tirman [JB]]

You can implement streaming by writing the implementation using expect and actual declarations. For Android, you can use my example. For iOS, you will need to figure out how to stream the response body (ByteReadChannel) to the target destination.