Duration elapsed = clock.elapsedTime();
            Duration calculated = Duration.between(clock.startInstant(), now);

            // Allow for small timing differences (1ms) due to execution time between measurements
            assertTrue(
                    Math.abs(elapsed.toMillis() - calculated.toMillis()) <= 1,
                    "Elapsed time should match calculated duration between start and now");

# Primeiros Passos

O arquivo FastAPI mais simples pode se parecer com:

{* ../../docs_src/first_steps/tutorial001.py *}

Copie o conteúdo para um arquivo `main.py`.

Execute o servidor:

<div class="termy">

```console
$ <font color="#4E9A06">fastapi</font> dev <u style="text-decoration-style:solid">main.py</u>

  <span style="background-color:#009485"><font color="#D3D7CF"> FastAPI </font></span>  Starting development server 🚀

        // Close the writer on the writer's thread.
        val writerToClose = this.writer
        if (writerToClose != null) {
          this.writer = null
          taskQueue.execute("$name writer close", cancelable = false) {
            writerToClose.closeQuietly()
          }
        }

        this.taskQueue.shutdown()
      }

 * may ultimately cause the application to slow down or crash.
 *
 * Both this class and [Response] implement [Closeable]. Closing a response simply
 * closes its response body. If you invoke [Call.execute] or implement [Callback.onResponse] you
 * must close this body by calling any of the following methods:
 *
 * * `Response.close()`
 * * `Response.body().close()`
 * * `Response.body().source().close()`

              .body(new ProgressResponseBody(originalResponse.body(), progressListener))
              .build();
        })
        .build();

    try (Response response = client.newCall(request).execute()) {
      if (!response.isSuccessful()) throw new IOException("Unexpected code " + response);

      System.out.println(response.body().string());
    }
  }

Neste caso, ela será montada no caminho `/subapi`:

{* ../../docs_src/sub_applications/tutorial001.py hl[11,19] *}

### Verifique a documentação automática da API

Agora, execute `uvicorn` com a aplicação principal, se o seu arquivo for `main.py`, seria:

<div class="termy">

```console
$ uvicorn main:app --reload

* Construisez votre image FastAPI :

<div class="termy">

```console
$ docker build -t myimage .

---> 100%
```

</div>

## Démarrer le conteneur Docker

* Exécutez un conteneur basé sur votre image :

<div class="termy">

```console
$ docker run -d --name mycontainer -p 80:80 myimage
```

</div>

//     Vendors might change the settings based on the configuration and scale out of the solution (more storage nodes =>
//     higher task limit).
//
//     <S3ConcurrentTaskLimit>
//
//   - Defines how many S3 operations are executed parallel within one Repository Task Slot (and within one backup object
//     that gets offloaded). The same registry key setting overwrites the storage-defined setting.
//     Optional value, default 64, range: 1-unlimited
//

      .url("https://api.imgur.com/3/image")
      .post(new ProgressRequestBody(requestBody, progressListener))
      .build();

    Response response = client.newCall(request).execute();
    if (!response.isSuccessful()) throw new IOException("Unexpected code " + response);

    System.out.println(response.body().string());
  }

  public static void main(String... args) throws Exception {

Якщо Ви зайдете до **інтерфейсу документації API** за адресою `/docs`, Ви зможете побачити **документацію** для cookie у Ваших **операціях шляху**.

Але навіть якщо Ви заповните дані й натиснете "Execute", оскільки інтерфейс документації працює з **JavaScript**, cookie не будуть відправлені, і Ви побачите **помилку**, ніби Ви не ввели жодних значень.

///

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