scala-native http get example

build.sbt

scalaVersion := "2.11.12"

enablePlugins(ScalaNativePlugin)

plugins.sbt

addSbtPlugin("org.scala-native" % "sbt-scala-native" % "0.3.7")

ScalaNativeHttpGetExample.scala

package example

import java.net._
import java.io._

object ScalaNativeHttpGetExample {
  def using[A <: Closeable, B] (a: A)(f: A => B): B =
    try {
      f(a)
    } finally {
      a.close()
    }

  def main (args: Array[String]): Unit = {
    val host = "repo1.maven.org"
    val port = 80
    // val path = "/maven2/org/scalaz/scalaz-core_2.12/7.2.20/scalaz-core_2.12-7.2.20.pom"
    val path = args.head

    using(new Socket(host, port)) { socket =>
      using(new BufferedReader(new InputStreamReader(socket.getInputStream))) { reader =>
        using(new BufferedWriter(new OutputStreamWriter(socket.getOutputStream))) { writer =>
          writer.write("GET " + path + " HTTP/1.0\r\n")
          writer.write("Host: " + host + ":" + port + "\r\n")
          writer.write("\r\n")
          writer.flush()

          @annotation.tailrec
          def loop (): Unit = {
            val line = reader.readLine
            if (line != null) {
              println(line)
              loop()
            }
          }

          loop()
        }
      }
    }
  }
}