Created
November 23, 2017 17:28
An example echo server written in Kotlin.
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
import java.io.BufferedReader | |
import java.io.InputStreamReader | |
import java.io.PrintWriter | |
import java.net.ServerSocket | |
import kotlin.concurrent.thread | |
const val SERVER_PORT = 1337 | |
fun main(args: Array<String>) { | |
println("Hello World!") | |
val socketListener = ServerSocket(SERVER_PORT) | |
var clientNumber = 0 | |
socketListener.use { | |
while (true) { | |
val socket = socketListener.accept() | |
thread(start = true) { | |
clientNumber++ | |
val thisClient = clientNumber | |
val output = PrintWriter(socket.getOutputStream(), true) | |
val input = BufferedReader(InputStreamReader(socket.getInputStream())) | |
output.println("Welcome to the Kotlin echo server. You are client #$thisClient.") | |
output.println("End this conversation by sending a single '.' on a new line.") | |
while (true) { | |
val line = input.readLine() | |
if (line == ".") { | |
println("Client #$thisClient closed connection.") | |
output.println("Kthxbai!") | |
socket.close() | |
return@thread | |
} | |
println("Client #$thisClient said: $line") | |
output.println("I heard you say: " + line) | |
} | |
} | |
} | |
} | |
} |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment