Nevertheless, as this would mean waiting for the response to travel through the network while unnecessarily holding a resource in a dependency with yield (for example a database connection), this was changed in FastAPI 0.106.0.

!!! tip

 │                          │
 │  <span style="background-color:#272822"><font color="#FF4689">from</font></span><span style="background-color:#272822"><font color="#F8F8F2"> main </font></span><span style="background-color:#272822"><font color="#FF4689">import</font></span><span style="background-color:#272822"><font color="#F8F8F2"> app</font></span><span style="background-color:#272822">  </span>  │
 │                          │

* Soporte para **WebSocket**.
* <abbr title="En español: tareas que se ejecutan en el fondo, sin frenar requests, en el mismo proceso. En ingles: In-process background tasks">Tareas en background</abbr>.
* Eventos de startup y shutdown.
* Cliente de pruebas construido con HTTPX.
* **CORS**, GZip, Static Files, Streaming responses.
* Soporte para **Session and Cookie**.

```mermaid
sequenceDiagram

participant client as Client
participant handler as Exception handler
participant dep as Dep with yield
participant operation as Path Operation
participant tasks as Background tasks

    Note over client,tasks: Can raise exception for dependency, handled after response is sent
    Note over client,operation: Can raise HTTPException and can change the response
    client ->> dep: Start request

      }
      server.enqueue(MockResponse().setBody("enqueued in the background"))
    }.start()
    val connection = server.url("/").toUrl().openConnection()
    val inputStream = connection.getInputStream()
    val reader = BufferedReader(InputStreamReader(inputStream, StandardCharsets.UTF_8))
    assertThat(reader.readLine()).isEqualTo("enqueued in the background")
  }

  @Test
  fun nonHexadecimalChunkSize() {

```mermaid
sequenceDiagram

participant client as Client
participant handler as Exception handler
participant dep as Dep with yield
participant operation as Path Operation
participant tasks as Background tasks

    Note over client,tasks: Can raise exception for dependency, handled after response is sent
    Note over client,operation: Can raise HTTPException and can change the response
    client ->> dep: Start request

      server.enqueue(
        MockResponse.Builder()
          .body("enqueued in the background")
          .build(),
      )
    }.start()
    val connection = server.url("/").toUrl().openConnection()
    val reader = BufferedReader(InputStreamReader(connection!!.getInputStream(), UTF_8))
    assertThat(reader.readLine()).isEqualTo("enqueued in the background")
  }

  @Test
  fun nonHexadecimalChunkSize() {
    server.enqueue(

* Wsparcie dla **WebSocket**.
* <abbr title='Zadania wykonywane w tle, bez zatrzymywania żądań, w tym samym procesie. Po angielsku: In-process background tasks'>Zadania w tle</abbr>.
* Eventy startup i shutdown.
* Klient testowy zbudowany na bazie biblioteki `requests`.
* **CORS**, GZip, pliki statyczne, streamy.
* Obsługa **sesji i ciasteczek**.

```mermaid
sequenceDiagram

participant client as Client
participant handler as Exception handler
participant dep as Dep with yield
participant operation as Path Operation
participant tasks as Background tasks

    Note over client,tasks: Can raise exception for dependency, handled after response is sent
    Note over client,operation: Can raise HTTPException and can change the response
    client ->> dep: Start request

* پشتیبانی از **WebSocket**.
* <abbr title="In-process background tasks">تسک های درجریان در پس زمینه</abbr>.
* <abbr title="Startup and shutdown events">رویداد های راه اندازی و متوفق شدن<abbr>.
* تست کلاینت ساخته شده به روی HTTPX.