DependencyHandler dependencies = project.getDependencies();
        String checkstyleVersion = VersionProperties.getVersions().get("checkstyle");
        Provider<String> dependencyProvider = project.provider(() -> "org.elasticsearch:build-conventions:" + project.getVersion());
        dependencies.add("checkstyle", "com.puppycrawl.tools:checkstyle:" + checkstyleVersion);

It is provided directly by Starlette, but you can import it from `fastapi`:

```python
from fastapi import WebSocket
```

/// tip

When you want to define dependencies that should be compatible with both HTTP and WebSockets, you can define a parameter that takes an `HTTPConnection` instead of a `Request` or a `WebSocket`.

///

::: fastapi.WebSocket
    options:
        members:

    /**
     * Sets the level of validation to perform on processed models. For building of projects,
     * {@link #VALIDATION_LEVEL_STRICT} should be used to ensure proper building. For the mere retrieval of dependencies
     * during artifact resolution, {@link #VALIDATION_LEVEL_MINIMAL} should be used to account for models of poor
     * quality. By default, models are validated in strict mode.
     *

        SourceSet yamlTestSourceSet = sourceSets.create(SOURCE_SET_NAME);

        registerTestTask(project, yamlTestSourceSet);

        // setup the dependencies
        setupTestDependenciesDefaults(project, yamlTestSourceSet);

        // setup the copy for the rest resources
        project.getTasks().withType(CopyRestApiTask.class).configureEach(copyRestApiTask -> {

      </excludes>
    </fileSet>
    <fileSet>
      <directory>${project.build.directory}/maven-shared-archive-resources/META-INF</directory>
      <outputDirectory>/</outputDirectory>
      <includes>
        <include>DEPENDENCIES</include>
        <!-- exclude the license and notice as they are not as accurate as the ones from above -->
      </includes>
    </fileSet>
  </fileSets>

                    ArtifactRepository localRepository,
                    List<ArtifactRepository> remoteRepositories) {
                Set<Artifact> dependencies = new HashSet<>();

                return new ResolutionGroup(artifact, dependencies, remoteRepositories);
            }

            @Override
            public List<ArtifactVersion> retrieveAvailableVersions(
                    Artifact artifact,

NAMESPACE com.google.common.escape
NAMESPACE com.google.common.escape.testing
NAMESPACE com.google.common.io
NAMESPACE com.google.common.net
NAMESPACE com.google.common.testing

# Allow our dependencies for now.
NAMESPACE junit.framework
NAMESPACE org.junit

# ***** REAL CYCLES *****
# Cycle exists until future completes

  - [Changes by Kind](#changes-by-kind)
    - [Feature](#feature)
    - [Bug or Regression](#bug-or-regression)
  - [Dependencies](#dependencies)
    - [Added](#added)
    - [Changed](#changed)
    - [Removed](#removed)
- [v1.27.15](#v12715)
  - [Downloads for v1.27.15](#downloads-for-v12715)
    - [Source Code](#source-code-1)

You can use a closing code from the [valid codes defined in the specification](https://tools.ietf.org/html/rfc6455#section-7.4.1).

///

### Try the WebSockets with dependencies { #try-the-websockets-with-dependencies }

Run your application:

<div class="termy">

```console
$ fastapi dev

# Other Tools

## uv

If uv is available, use it to manage dependencies.

## Ruff

If Ruff is available, use it to lint and format the code. Consider enabling the FastAPI rules.

## ty

If ty is available, use it to check types.

## Asyncer

When needing to run blocking code inside of async functions, or async code inside of blocking functions, suggest using Asyncer.

Prefer it over AnyIO or asyncio.

Install: