# WebSockets

When defining WebSockets, you normally declare a parameter of type `WebSocket` and with it you can read data from the client and send data to it.

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

```python
from fastapi import WebSocket
```

!!! tip

	host, err := canonicalHost(u.Host)
	if err != nil {
		return
	}
	key := jarKey(host, j.psList)
	defPath := defaultPath(u.Path)

	j.mu.Lock()
	defer j.mu.Unlock()

	submap := j.entries[key]

	modified := false
	for _, cookie := range cookies {
		e, remove, err := j.newEntry(cookie, now, defPath, host)
		if err != nil {
			continue
		}
		id := e.id()
		if remove {
			if submap != nil {

```JSON
{
    "name": "Foo",
    "price": 45.2
}
```

## Declare como um parâmetro

Para adicionar o corpo na *função de operação de rota*, declare-o da mesma maneira que você declarou parâmetros de rota e consulta:

```Python hl_lines="18"
{!../../../docs_src/body/tutorial001.py!}
```

...E declare o tipo como o modelo que você criou, `Item`.

## Resultados

 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.gradle.internal;

/**
 * Equivalent to {@code Transformer}, but does not declare nullability due to Java 6 restrictions.
 *
 * <p>A {@code Transformer} transforms objects of type.</p>
 *
 * <p>Implementations are free to return new objects or mutate the incoming value.</p>
 *

public abstract class KotlinForwardDeclarationProviderFactory : KotlinOptionalPlatformComponent {
    /**
     * Create a Kotlin/Native declaration provider for [ktModule].
     *
     * Generally, only Kotlin/Native KLIB libraries can declare forward declarations.
     * For other types of [KtModule]s the provider normally shouldn't be created.
     *
     * @return a declaration provider for [ktModule] or `null` if the module cannot contain forward declarations

## What is "Dependency Injection"

**"Dependency Injection"** means, in programming, that there is a way for your code (in this case, your *path operation functions*) to declare things that it requires to work and use: "dependencies".

And then, that system (in this case **FastAPI**) will take care of doing whatever is needed to provide your code with those needed dependencies ("inject" the dependencies).

2. Annotate the property with `@Internal` or `@ServiceReference` (since 8.0).
3. Assign a shared build service provider to the property (optional, when using `@ServiceReference(<serviceName>)`).
4. Declare the association between the task and the service so Gradle can properly honor the build service lifecycle and its usage constraints (also optional when using `@ServiceReference`).

These functions can be declared with `async def` or normal `def`.

### `startup` event

To add a function that should be run before the application starts, declare it with the event `"startup"`:

```Python hl_lines="8"
{!../../../docs_src/events/tutorial001.py!}
```

        );
    }

    private String missingScopeMessage(Class<?> serviceType) {
        return String.format(
            "The service '%s' is registered in the '%s' scope but does not declare it. " +
                "Add the '@ServiceScope()' annotation on '%s' with the '%s' scope.",
            serviceType.getName(), scope.getSimpleName(), serviceType.getSimpleName(), scope.getSimpleName()
        );
    }

	// across UPDATE/PATCH requests.
	CRDValidationRatcheting featuregate.Feature = "CRDValidationRatcheting"

	// owner: @jpbetz
	// alpha: v1.30
	//
	// CustomResourceDefinitions may include SelectableFields to declare which fields
	// may be used as field selectors.
	CustomResourceFieldSelectors featuregate.Feature = "CustomResourceFieldSelectors"
)

func init() {