# Tutorial – Benutzerhandbuch { #tutorial-user-guide }

Dieses Tutorial zeigt Ihnen Schritt für Schritt, wie Sie **FastAPI** mit den meisten seiner Funktionen verwenden können.

Jeder Abschnitt baut schrittweise auf den vorhergehenden auf, ist jedoch in einzelne Themen gegliedert, sodass Sie direkt zu einem bestimmten Thema übergehen können, um Ihre spezifischen API-Anforderungen zu lösen.

     */
    Map<String, String> getSystemProperties();

    /**
     * Gets the user properties to use for interpolation and profile activation. The user properties have been
     * configured directly by the user on his discretion, e.g. via the {@code -Dkey=value} parameter on the command
     * line.
     *
     * @return The user properties, never {@code null}.
     */
    Map<String, String> getUserProperties();

    /**

        RobotsTxt robotsTxt;
        final InputStream in = new java.io.ByteArrayInputStream(robotsTxtContent.getBytes());
        try {
            robotsTxt = robotsTxtHelper.parse(in);
        } finally {
            CloseableUtil.closeQuietly(in);
        }

        // Directives before User-agent should be ignored

```JSON
{
    "name": "Foo",
    "description": "The pretender",
    "price": 42.0,
    "tax": 3.2
}
```

Но вы также можете объявить множество параметров тела запроса, например `item` и `user`:

{* ../../docs_src/body_multiple_params/tutorial002_py310.py hl[20] *}

В этом случае **FastAPI** заметит, что в функции есть более одного параметра тела (два параметра, которые являются Pydantic-моделями).

 * governing permissions and limitations under the License.
 */
package org.codelibs.fess.opensearch.user.exbhv;

import java.util.Map;
import java.util.regex.Pattern;
import java.util.stream.Collectors;

import org.codelibs.core.misc.Pair;
import org.codelibs.fess.opensearch.user.bsbhv.BsGroupBhv;
import org.codelibs.fess.opensearch.user.exentity.Group;
import org.codelibs.fess.util.ComponentUtil;

    assertFailsWith<NullPointerException> {
      (mapOf("User-Agent" to null) as Map<String, String>).toHeaders()
    }
  }

  @Test fun toMultimapGroupsHeaders() {
    val headers =
      Headers.headersOf(
        "cache-control",
        "no-cache",
        "cache-control",
        "no-store",
        "user-agent",
        "OkHttp",
      )
    val headerMap = headers.toMultimap()

        }
    },
    auto_error=False,
)


class User(BaseModel):
    username: str


def get_current_user(oauth_header: Optional[str] = Security(reusable_oauth2)):
    if oauth_header is None:
        return None
    user = User(username=oauth_header)
    return user


@app.post("/login")
def login(form_data: OAuth2PasswordRequestFormStrict = Depends()):

 * governing permissions and limitations under the License.
 */
package org.codelibs.fess.entity;

import java.io.Serializable;

/**
 * Interface representing a Fess user with authentication and authorization information.
 * Provides access to user name, roles, groups, and permissions.
 */
public interface FessUser extends Serializable {

    /**
     * Gets the user's display name.
     * @return The user's name.
     */

 * either express or implied. See the License for the specific language
 * governing permissions and limitations under the License.
 */
package org.codelibs.fess.opensearch.user.exentity;

import java.util.HashMap;
import java.util.Map;

import org.codelibs.fess.opensearch.user.bsentity.BsGroup;

/**
 * @author FreeGen
 */
public class Group extends BsGroup {

    private static final long serialVersionUID = 1L;

    return user_id


# A Pydantic model
class User(BaseModel):
    id: int
    name: str
    joined: date
```

That can then be used like:

```Python
my_user: User = User(id=3, name="John Doe", joined="2018-07-19")

second_user_data = {
    "id": 4,
    "name": "Mary",
    "joined": "2018-11-30",
}

my_second_user: User = User(**second_user_data)
```

/// info