How to get the value of another function synchronously - kotlin

Question

I am using the ktor websocket module
When I send data to the client, how do I get the data back from the client after this send?
val result = serverSession.send(json)
// result
Just like this
It is actually the Unit type
But I want to get the String

Answer 1

There are great examples on official site of Ktor.
If you are server-side, check this link (https://ktor.io/docs/websocket.html#handle-single-session) and the below example.
webSocket("/echo") {
send("Please enter your name")
for (frame in incoming) {
when (frame) {
is Frame.Text -> {
val receivedText = frame.readText()
if (receivedText.equals("bye", ignoreCase = true)) {
close(CloseReason(CloseReason.Codes.NORMAL, "Client said BYE"))
} else {
send(Frame.Text("Hi, $receivedText!"))
}
}
}
}
}
If you are client-side, check this link (https://ktor.io/docs/websocket-client.html#example) and the below example.
client.webSocket(method = HttpMethod.Get, host = "127.0.0.1", port = 8080, path = "/echo") {
while(true) {
val othersMessage = incoming.receive() as? Frame.Text
println(othersMessage?.readText())
val myMessage = Scanner(System.`in`).next()
if(myMessage != null) {
send(myMessage)
}
}
}