But that will only allow certain types of communication, excluding everything that involves credentials: Cookies, Authorization headers like those used with Bearer Tokens, etc.

So, for everything to work correctly, it's better to specify explicitly the allowed origins.

## Use `CORSMiddleware` { #use-corsmiddleware }

set WRAPPER_LAUNCHER=org.apache.maven.wrapper.MavenWrapperMain

set DOWNLOAD_URL="https://repo.maven.apache.org/maven2/io/takari/maven-wrapper/0.5.6/maven-wrapper-0.5.6.jar"

FOR /F "tokens=1,2 delims==" %%A IN ("%MAVEN_PROJECTBASEDIR%\.mvn\wrapper\maven-wrapper.properties") DO (
    IF "%%A"=="wrapperUrl" SET DOWNLOAD_URL=%%B
)

```JSON
{
    "message": "Hello World",
    "root_path": "/api/v1"
}
```

/// tip

Notice that even though you are accessing it at `http://127.0.0.1:8000/app` it shows the `root_path` of `/api/v1`, taken from the option `--root-path`.

///

     */
    // CHECKSTYLE_ON: LineLength
    public static void main(String... args) {
        System.out.println("Display parameters as parsed by Maven (in canonical form and as a list of tokens) and"
                + " comparison result:");
        if (args.length == 0) {
            return;
        }

        ComparableVersion prev = null;
        int i = 1;

from pydantic.types import SecretBytes, SecretStr
from pydantic_core import PydanticUndefinedType

from ._compat import (
    Url,
    is_pydantic_v1_model_instance,
)


# Taken from Pydantic v1 as is
def isoformat(o: Union[datetime.date, datetime.time]) -> str:
    return o.isoformat()


# Adapted from Pydantic v1
# TODO: pv2 should this return strings instead?

            }
        }
    }

    private ArtifactRepositoryLayout getLayout(String id) {
        return layouts.get(id);
    }

    //
    // Taken from LegacyRepositorySystem
    //

    public static org.apache.maven.model.Repository fromSettingsRepository(
            org.apache.maven.settings.Repository settingsRepository) {

The generated code still has some **duplicated information**.

We already know that this method is related to the **items** because that word is in the `ItemsService` (taken from the tag), but we still have the tag name prefixed in the method name too. 😕

We will probably still want to keep it for OpenAPI in general, as that will ensure that the operation IDs are **unique**.

Tous les protocoles de sécurités sont définis dans OpenAPI, incluant:

* HTTP Basic.
* **OAuth2** (aussi avec **JWT tokens**). Jetez un oeil au tutoriel [OAuth2 avec JWT](tutorial/security/oauth2-jwt.md){.internal-link target=_blank}.
* Clés d'API dans:
    * Le header.
    * Les paramètres de requêtes.
    * Les cookies, etc.

Sicherheit und Authentifizierung sind integriert. Ohne Kompromisse bei Datenbanken oder Datenmodellen.

Alle in OpenAPI definierten Sicherheitsschemas, inklusive:

* HTTP Basic.
* **OAuth2** (auch mit **JWT Tokens**). Siehe dazu das Tutorial zu [OAuth2 mit JWT](tutorial/security/oauth2-jwt.md){.internal-link target=_blank}.
* API Schlüssel in:
    * Headern.
    * Query-Parametern.
    * Cookies, usw.

Security and authentication integrated. Without any compromise with databases or data models.

All the security schemes defined in OpenAPI, including:

* HTTP Basic.
* **OAuth2** (also with **JWT tokens**). Check the tutorial on [OAuth2 with JWT](tutorial/security/oauth2-jwt.md){.internal-link target=_blank}.
* API keys in:
    * Headers.
    * Query parameters.
    * Cookies, etc.