Minimal embedded HTTP server in Kotlin using Java built in HttpServer

simple-http-server.kt

import com.sun.net.httpserver.HttpServer
import java.io.PrintWriter
import java.net.InetSocketAddress

/**
 * Minimal embedded HTTP server in Kotlin using Java built in HttpServer
 */
fun main(args: Array<String>) {
    HttpServer.create(InetSocketAddress(8080), 0).apply {

        createContext("/hello") { http ->
            http.responseHeaders.add("Content-type", "text/plain")
            http.sendResponseHeaders(200, 0)
            PrintWriter(http.responseBody).use { out ->
                out.println("Hello ${http.remoteAddress.hostName}!")
            }
        }

        start()
    }
}

It is not recommended to use the package com.sun.* if you plan to move to other JDK like OpenJDK.
It's a proprietary package owned by Oracle/Sun.
Read more at https://www.oracle.com/java/technologies/faq-sun-packages.html

It is not recommended to use the package com.sun.* if you plan to move to other JDK like OpenJDK. It's a proprietary package owned by Oracle/Sun. Read more at https://www.oracle.com/java/technologies/faq-sun-packages.html

Don't be confused. "com.sun" and "sun" are 2 different packages. Some of the "com.sun" API are internal, but HttpServer is not. It's a part of standard public APIs.