Get countinuous json data from server before connection close in ktor client - kotlin

Question

I'm using ktor client in my android project and I want to get countinous data before I can close the connection. Here is the example of nodeJS app that give data countinuosly.
const app = require("express")()
let count = 0
app.get("/", (req, res) => {
const headers = {
'Content-Type': 'text/event-stream',
'Connection': 'keep-alive',
'Cache-Control': 'no-cache'
}
res.writeHead(200, headers)
setInterval(() => {
res.write({data: count})
count++
}, 2000);
})
app.listen(3000, () => console.log("ok"))
I don't know how to implement this, and I couldn't find anything on the internet also. Any help will be appreciated.

Answer 1

You can read data from a response stream as soon as it becomes available for the client. Here is an example:
val client = HttpClient(CIO) {
install(HttpTimeout)
}
client.prepareGet("http://localhost:3000/") {
timeout {
requestTimeoutMillis = Long.MAX_VALUE
}
}.execute { response ->
val channel = response.bodyAsChannel()
while (!channel.isClosedForRead) {
val buffer = ByteBuffer.allocateDirect(1024)
val read = channel.readAvailable(buffer)
if (read == -1) break
buffer.flip()
val jsonString = Charsets.UTF_8.decode(buffer).toString()
println(jsonString)
}
}