Vous pouvez utiliser un code de fermeture parmi les [codes valides définis dans la spécification](https://tools.ietf.org/html/rfc6455#section-7.4.1).

///

### Essayez les WebSockets avec des dépendances { #try-the-websockets-with-dependencies }

Exécutez votre application :

<div class="termy">

```console
$ fastapi dev

                    .get());
            options.addOption(Option.builder(ALSO_MAKE_DEPENDENTS)
                    .longOpt("also-make-dependents")
                    .desc("If project list is specified, also build projects that depend on projects on the list")
                    .get());
            options.addOption(Option.builder(THREADS)

You can define dependencies that in turn can define dependencies themselves.

In the end, a hierarchical tree of dependencies is built, and the **Dependency Injection** system takes care of solving all these dependencies for you (and their sub-dependencies) and providing (injecting) the results at each step.

Bu yüzden onları ayrı bir `dependencies` module’üne koyuyoruz (`app/dependencies.py`).

Şimdi, özel bir `X-Token` header'ını okumak için basit bir dependency kullanalım:

{* ../../docs_src/bigger_applications/app_an_py310/dependencies.py hl[3,6:8] title["app/dependencies.py"] *}

/// tip | İpucu

Örneği basit tutmak için uydurma bir header kullanıyoruz.

        /**
         * Sets the direct dependencies. If both a root dependency and direct dependencies are given in the request, the
         * direct dependencies from the request will be merged with the direct dependencies from the root dependency's
         * artifact descriptor, giving higher priority to the dependencies from the request.
         *
         * @param dependencies the direct dependencies, may be {@code null}

* All these *path operations* will have the list of `dependencies` evaluated/executed before them.
    * If you also declare dependencies in a specific *path operation*, **they will be executed too**.
    * The router dependencies are executed first, then the [`dependencies` in the decorator](dependencies/dependencies-in-path-operation-decorators.md), and then the normal parameter dependencies.

  dependencies:
    "@types/node" "*"

"@types/eslint-scope@^3.7.3":
  version "3.7.4"
  resolved "https://registry.yarnpkg.com/@types/eslint-scope/-/eslint-scope-3.7.4.tgz#37fc1223f0786c39627068a12e94d6e6fc61de16"
  integrity sha512-9K4zoImiZc3HlIp6AVUDE4CWYx22a+lhSZMYNpbjW04+YF0KWj4pJXnEMjdnFTiQibFFmElcsasJXDbdI/EPhA==
  dependencies:
    "@types/eslint" "*"
    "@types/estree" "*"

                    when {
                        line.contains("These transitive dependencies should be declared directly:") -> {
                            dependencyFixes.addToMap(filePath, extractDependencies(index))
                        }

                        line.contains("Existing dependencies which should be modified to be as indicated:") -> {

Así que las ponemos en su propio módulo `dependencies` (`app/dependencies.py`).

Ahora utilizaremos una dependencia simple para leer un header `X-Token` personalizado:

{* ../../docs_src/bigger_applications/app_an_py310/dependencies.py hl[3,6:8] title["app/dependencies.py"] *}

/// tip | Consejo

Estamos usando un header inventado para simplificar este ejemplo.

Então, as colocamos em seu próprio módulo de `dependencies` (`app/dependencies.py`).

Agora usaremos uma dependência simples para ler um cabeçalho `X-Token` personalizado:

{* ../../docs_src/bigger_applications/app_an_py310/dependencies.py hl[3,6:8] title["app/dependencies.py"] *}

/// tip | Dica

Estamos usando um cabeçalho inventado para simplificar este exemplo.