}

    /**
     * Attempts to perform a web socket upgrade on the connection.
     * This will overwrite any previously set status, body, or streamHandler.
     */
    public fun webSocketUpgrade(listener: WebSocketListener): Builder =
      apply {
        status = "HTTP/1.1 101 Switching Protocols"
        setHeader("Connection", "Upgrade")
        setHeader("Upgrade", "websocket")
        webSocketListener = listener

class HeadersRequestTest {
  @Test fun readNameValueBlockDropsForbiddenHeadersHttp2() {
    val headerBlock =
      headersOf(
        ":status",
        "200 OK",
        ":version",
        "HTTP/1.1",
        "connection",
        "close",
      )
    val request = Request.Builder().url("http://square.com/").build()
    val response = readHttp2HeadersList(headerBlock, Protocol.HTTP_2).request(request).build()

/**
 * SMB1 COM_TREE_DISCONNECT command implementation.
 *
 * This command disconnects from a tree connection (share) on the server.
 * It releases the tree ID and terminates access to the share.
 */
public class SmbComTreeDisconnect extends ServerMessageBlock {

    /**
     * Constructs a tree disconnect request to close a connection to a shared resource.
     *
     * @param config the configuration to use
     */

      .assertLogMatch(Regex("""connectStart: ${url.host}/.+ DIRECT"""))
      .assertLogMatch(Regex("""connectEnd: http/1.1"""))
      .assertLogMatch(
        Regex(
          """connectionAcquired: Connection\{${url.host}:\d+, proxy=DIRECT hostAddress=${url.host}/.+ cipherSuite=none protocol=http/1\.1\}""",
        ),
      ).assertLogMatch(Regex("""requestHeadersStart"""))
      .assertLogMatch(Regex("""requestHeadersEnd"""))

     * @return active tree handle
     * @throws CIFSException if connection fails
     *
     */
    synchronized SmbTreeHandleImpl ensureTreeConnected() throws CIFSException {
        // Optimization: Check connection validity more efficiently
        if (this.treeHandle != null && this.treeHandle.isConnected()) {
            // Connection is still valid - reuse it

            try {
                if (this.treeConnection != null) {
                    // Release the tree connection if possible
                    log.debug("Releasing tree connection during emergency cleanup");
                }
            } catch (Exception e) {
                log.debug("Error releasing tree connection during emergency cleanup", e);
            }

            // Note: resourceLoc is final, cannot be set to null

     * @throws CIFSException if an error occurs
     */
    @Override
    SmbPipeOutputStream getOutput() throws CIFSException;

    /**
     * Ensures that the tree connection is established and returns it.
     *
     * @return tree connection
     * @throws CIFSException if an error occurs connecting to the tree
     */
    SmbTreeHandleInternal ensureTreeConnected() throws CIFSException;

    /**

        // Test constructor with different exception types as cause
        String message = "SSO process failed";

        // Test with IOException
        Exception ioException = new java.io.IOException("Connection refused");
        SsoProcessException exception1 = new SsoProcessException(message, ioException);
        assertEquals(ioException, exception1.getCause());

        // Test with IllegalArgumentException

import okhttp3.internal.concurrent.Task
import okhttp3.internal.concurrent.TaskRunner
import okhttp3.internal.concurrent.assertLockHeld
import okhttp3.internal.connection.BufferedSocket
import okhttp3.internal.connection.RealCall
import okhttp3.internal.connection.asBufferedSocket
import okhttp3.internal.okHttpName
import okhttp3.internal.ws.WebSocketProtocol.CLOSE_CLIENT_GOING_AWAY

 */
package okhttp3.dnsoverhttps

import java.net.InetAddress
import java.net.UnknownHostException
import okhttp3.Dns

/**
 * Internal Bootstrap DNS implementation for handling initial connection to DNS over HTTPS server.
 *
 * Returns hardcoded results for the known host.
 */
internal class BootstrapDns(
  private val dnsHostname: String,
  private val dnsServers: List<InetAddress>,
) : Dns {