}
                }.build(),
            ),
          )
        }
      }.addNetworkInterceptor {
        val socket = it.connection()!!.socket() as SSLSocket

        handshakeEnabledCipherSuites = socket.enabledCipherSuites.toList()

        it.proceed(it.request())
      }.build()

  private fun makeRequest(client: OkHttpClient): Handshake {

fs.s3a.max.total.tasks=2048 # Maximum number of parallel tasks
fs.s3a.multipart.size=512M # Size of each multipart chunk
fs.s3a.multipart.threshold=512M # Size before using multipart uploads
fs.s3a.socket.recv.buffer=65536 # Read socket buffer hint
fs.s3a.socket.send.buffer=65536 # Write socket buffer hint
fs.s3a.threads.max=2048 # Maximum number of threads for S3A
```

The rest of the other optimization options are discussed in the links below

  fun upgradeToSocket(): Socket {
    call.upgradeToSocket()
    (codec.carrier as RealConnection).useAsSocket()

    return object : Socket {
      override fun cancel() {
        ******@****.***()
      }

      override val sink =
        RequestBodySink(
          delegate = codec.socket.sink,
          contentLength = -1L,
          isSocket = true,

    /** Maximum size for RDMA read/write operations */
    protected int maxReadWriteSize;

    /**
     * Create new RDMA connection
     *
     * @param remote remote socket address
     * @param local local socket address, may be null
     */
    public RdmaConnection(InetSocketAddress remote, InetSocketAddress local) {
        this.remoteAddress = remote;
        this.localAddress = local;

  }

  class DelayingSocketFactory(
    val onConnect: Socket.(timeout: Int) -> Unit = {},
    val onRead: Socket.() -> Unit = {},
    val onWrite: Socket.() -> Unit = {},
  ) : DelegatingSocketFactory(getDefault()) {
    override fun createSocket(): Socket {
      return object : Socket() {
        override fun connect(
          endpoint: SocketAddress?,
          timeout: Int,

  override fun configureSocket(sslSocket: SSLSocket): SSLSocket = TlsFallbackScsvDisabledSSLSocket(sslSocket)

  private class TlsFallbackScsvDisabledSSLSocket(
    socket: SSLSocket,
  ) : DelegatingSSLSocket(socket) {
    override fun setEnabledCipherSuites(suites: Array<String>) {
      val enabledCipherSuites = mutableListOf<String>()
      for (suite in suites) {
        if (suite != TLS_FALLBACK_SCSV) {

 * limitations under the License.
 */
package okhttp3

import okio.ByteString

abstract class WebSocketListener {
  /**
   * Invoked when a web socket has been accepted by the remote peer and may begin transmitting
   * messages.
   */
  open fun onOpen(
    webSocket: WebSocket,
    response: Response,
  ) {
  }

  integrity sha512-V4GrkLy+HeF1F/en3SpUaM+7XxYXpuMUWLGde1kSSh5nQMN4hLrbPIkD+otwh6q9R6NOQBN4AMaOZ2zVjui82g==
  dependencies:
    "@socket.io/component-emitter" "~3.1.0"
    debug "~4.3.1"

socket.io@^4.4.1:
  version "4.5.4"
  resolved "https://registry.yarnpkg.com/socket.io/-/socket.io-4.5.4.tgz#a4513f06e87451c17013b8d13fdfaf8da5a86a90"

      matchesSocket(sslSocket) -> Conscrypt.getApplicationProtocol(sslSocket)
      else -> null // No TLS extensions if the socket class is custom.
    }

  override fun configureTlsExtensions(
    sslSocket: SSLSocket,
    hostname: String?,
    protocols: List<Protocol>,
  ) {
    // No TLS extensions if the socket class is custom.
    if (matchesSocket(sslSocket)) {
      // Enable session tickets.

# Test Client - `TestClient`

You can use the `TestClient` class to test FastAPI applications without creating an actual HTTP and socket connection, just communicating directly with the FastAPI code.

Read more about it in the [FastAPI docs for Testing](https://fastapi.tiangolo.com/tutorial/testing/).

You can import it directly from `fastapi.testclient`:

```python
from fastapi.testclient import TestClient
```