import (
	"context"
	"net"
	"syscall"
	"time"
)

// CheckPortAvailability - check if given host and port is already in use.
// Note: The check method tries to listen on given port and closes it.
// It is possible to have a disconnected client in this tiny window of time.
func CheckPortAvailability(host, port string, opts TCPOptions) (err error) {
	lc := &net.ListenConfig{

    @Test
    public void testBuildUrlWithHostString() {
        // IPv4 with port and path
        assertEquals("http://127.0.0.1:8080/path", IpAddressUtil.buildUrl("http", "127.0.0.1", 8080, "/path"));

        // IPv4 with port, no path
        assertEquals("http://192.168.1.1:9200", IpAddressUtil.buildUrl("http", "192.168.1.1", 9200, ""));

        // IPv6 with port and path

from fastapi.responses import RedirectResponse

app = FastAPI()


@app.get("/portal")
async def get_portal(teleport: bool = False) -> Response | dict:
    if teleport:
        return RedirectResponse(url="https://www.youtube.com/watch?v=dQw4w9WgXcQ")

  @Throws(IOException::class)
  override fun createServerSocket(port: Int): ServerSocket {
    val serverSocket = delegate.createServerSocket(port)
    return configureServerSocket(serverSocket)
  }

  @Throws(IOException::class)
  override fun createServerSocket(
    port: Int,
    backlog: Int,
  ): ServerSocket {
    val serverSocket = delegate.createServerSocket(port, backlog)
    return configureServerSocket(serverSocket)
  }

package main

import (
	"bytes"
	"encoding/json"
	"flag"
	"fmt"
	"io"
	"log"
	"net/http"
)

var port int

func init() {
	flag.IntVar(&port, "port", 8080, "Port to listen on")
}

func mainHandler(w http.ResponseWriter, r *http.Request) {
	body, err := io.ReadAll(r.Body)
	defer r.Body.Close()
	if err != nil {

  }

  @Override public Socket createSocket(InetAddress host, int port) throws IOException {
    Socket result = createSocket();

    try {
      result.connect(new InetSocketAddress(host, port));
    } catch (IOException e) {
      result.close();
      throw e;
    }
    return result;
  }

  @Override public Socket createSocket(

  }

  @Throws(IOException::class)
  @JvmOverloads
  fun start(port: Int = 0) {
    started = true
    delegate.start(port)
  }

  @Throws(IOException::class)
  fun start(
    inetAddress: InetAddress,
    port: Int,
  ) {
    started = true
    delegate.start(inetAddress, port)
  }

  @Synchronized
  @Throws(IOException::class)
  fun shutdown() {

from fastapi.responses import JSONResponse, RedirectResponse

app = FastAPI()


@app.get("/portal")
async def get_portal(teleport: bool = False) -> Response:
    if teleport:
        return RedirectResponse(url="https://www.youtube.com/watch?v=dQw4w9WgXcQ")

   * Starts the server on the loopback interface for the given port.
   *
   * @param port the port to listen to, or 0 for any available port. Automated tests should always
   * use port 0 to avoid flakiness when a specific port is unavailable.
   */
  @Throws(IOException::class)
  @JvmOverloads
  public fun start(port: Int = 0) {
    start(InetAddress.getByName("localhost"), port)
  }

  /**

        assertEquals(
            listOf(
                "-Dorg.gradle.workers.max=%maxParallelForks%",
                "-PmaxParallelForks=%maxParallelForks%",
                "-Dorg.gradle.internal.plugins.portal.url.override=%gradle.plugins.portal.url%",
                "-Dscan.value.tcPipeline=master",
                "-s",
                "%additional.gradle.parameters%",
                "--continue",