#### Ubiquity: provide concrete use cases


        Did you *actually* encounter the need for this feature in a real-world scenario, or is it
        just a feature that seems like a sensible addition to Guava?


        Before new features get added to Guava, we really want to be sure that it's for a use case
        that actually comes up in the real world. We want to hear the real-world use case so the

But normally you won't have to worry about it, it's done automatically, continue reading. 🤓

///

## Use Cases { #use-cases }

You could use this to stream data from an **AI LLM** service, from **logs** or **telemetry**, or from other types of data that can be structured in **JSON** items.

/// tip

Use base64 only if you definitely need to include binary data in JSON, and you can't use files for that.

## Pydantic `bytes` { #pydantic-bytes }

You can declare a Pydantic model with `bytes` fields, and then use `val_json_bytes` in the model config to tell it to use base64 to *validate* input JSON data, as part of that validation it will decode the base64 string into bytes.

## Integrated middlewares { #integrated-middlewares }

**FastAPI** includes several middlewares for common use cases, we'll see next how to use them.

/// note | Technical Details

For the next examples, you could also use `from starlette.middleware.something import SomethingMiddleware`.

   *
   * @deprecated Use {@link StandardCharsets#US_ASCII} instead.
   */
  @Deprecated @J2ktIncompatible @GwtIncompatible // Charset not supported by GWT
  public static final Charset US_ASCII = StandardCharsets.US_ASCII;

  /**
   * ISO-8859-1: ISO Latin Alphabet Number 1 (ISO-LATIN-1).
   *
   * @deprecated Use {@link StandardCharsets#ISO_8859_1} instead.
   */

   *
   * @deprecated Use {@link StandardCharsets#US_ASCII} instead.
   */
  @Deprecated @J2ktIncompatible @GwtIncompatible // Charset not supported by GWT
  public static final Charset US_ASCII = StandardCharsets.US_ASCII;

  /**
   * ISO-8859-1: ISO Latin Alphabet Number 1 (ISO-LATIN-1).
   *
   * @deprecated Use {@link StandardCharsets#ISO_8859_1} instead.
   */

/// tip

Review what each line does by clicking each number bubble in the code. 👆

///

/// warning

Make sure to **always** use the **exec form** of the `CMD` instruction, as explained below.

///

#### Use `CMD` - Exec Form { #use-cmd-exec-form }

The [`CMD`](https://docs.docker.com/reference/dockerfile/#cmd) Docker instruction can be written using two forms:

✅ **Exec** form:

## Use case { #use-case }

For example, imagine that you want to return an HTTP status code of "OK" `200` by default.

But if the data didn't exist, you want to create it, and return an HTTP status code of "CREATED" `201`.

But you still want to be able to filter and convert the data you return with a `response_model`.

For those cases, you can use a `Response` parameter.

java.nio.channels.FileChannel#read(java.nio.ByteBuffer, long)

@defaultMessage Use Lucene.parseLenient instead it strips off minor version
org.apache.lucene.util.Version#parseLeniently(java.lang.String)

org.apache.lucene.index.NoMergePolicy#INSTANCE @ explicit use of NoMergePolicy risks forgetting to configure NoMergeScheduler; use org.elasticsearch.common.lucene.Lucene#indexWriterConfigWithNoMerging() instead.

La query est l'ensemble des paires clé-valeur placées après le `?` dans une URL, séparées par des caractères `&`.

Par exemple, dans l'URL :

```
http://127.0.0.1:8000/items/?skip=0&limit=10
```

... les paramètres de requête sont :

* `skip` : avec une valeur de `0`
* `limit` : avec une valeur de `10`

Comme ils font partie de l'URL, ce sont « naturellement » des chaînes de caractères.