# Dependencies - `Depends()` and `Security()`

## `Depends()`

Dependencies are handled mainly with the special function `Depends()` that takes a callable.

Here is the reference for it and its parameters.

You can import it directly from `fastapi`:

```python
from fastapi import Depends
```

::: fastapi.Depends

## `Security()`

    steps:
      - name: Dump GitHub context
        env:
          GITHUB_CONTEXT: ${{ toJson(github) }}
        run: echo "$GITHUB_CONTEXT"
      - uses: tiangolo/issue-manager@0.5.1
        with:
          token: ${{ secrets.GITHUB_TOKEN }}
          config: >
            {
              "answered": {
                "delay": 864000,

    if: github.repository == 'gradle/gradle'

    steps:
      - name: Checkout repository
        uses: actions/checkout@v5
        with:
          ref: devprod/upgrade-to-latest-wrapper
          token: ${{ secrets.GITHUB_TOKEN }}
          fetch-depth: 0
      - name: Setup java
        uses: actions/setup-java@v5
        with:
          distribution: temurin
          java-version: 17

Для решения задачи давайте воспользуемся утилитами, предоставляемыми **FastAPI**.

### `OAuth2PasswordRequestForm`

Сначала импортируйте `OAuth2PasswordRequestForm` и затем используйте ее как зависимость с `Depends` в *эндпоинте* `/token`:


{* ../../docs_src/security/tutorial003_an_py310.py hl[4,78] *}

```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:
            - scope
            - app
            - url
            - base_url

import org.apache.maven.artifact.resolver.filter.ArtifactFilter;
import org.apache.maven.repository.legacy.resolver.conflict.ConflictResolver;

/**
 * Artifact collector - takes a set of original artifacts and resolves the best versions to use
 * along with their metadata. No artifacts are downloaded.
 */
@Deprecated
@SuppressWarnings("checkstyle:parameternumber")

    - 🧪 [Playwright](https://playwright.dev) for End-to-End testing.
    - 🦇 Dark mode support.
- 🐋 [Docker Compose](https://www.docker.com) for development and production.
- 🔒 Secure password hashing by default.
- 🔑 JWT token authentication.
- 📫 Email based password recovery.
- ✅ Tests with [Pytest](https://pytest.org).
- 📞 [Traefik](https://traefik.io) as a reverse proxy / load balancer.

    * <a href="https://fastapi.tiangolo.com/features/" class="external-link" target="_blank">**Birçok diger özelliği**</a> dahili otomatik doğrulama, serialization, interaktif dokümantasyon, OAuth2 JWT token ile authentication, vb.
* **Güvenli şifreleme** .
* **JWT token** kimlik doğrulama.
* **SQLAlchemy** models (Flask dan bağımsızdır. Celery worker'ları ile kullanılabilir).
* Kullanıcılar için temel başlangıç ​​modeli (gerektiği gibi değiştirin ve kaldırın).

//           value: "value*"
//       metadata:
//         - key: "content-type"
//           value: "image/*"
//     notify:
//       endpoint: "https://splunk-hec.dev.com"
//       token: "Splunk ..." # e.g. "Bearer token"
//
//   # target where the objects must be replicated
//   target:
//     type: "minio"
//     bucket: "testbucket1"
//     endpoint: "https://play.min.io"
//     path: "on"
//     credentials:

 * under the License.
 */
package org.apache.maven.artifact.resolver;

import javax.inject.Named;
import javax.inject.Singleton;

/**
 * Artifact collector - takes a set of original artifacts and resolves the best versions to use
 * along with their metadata. No artifacts are downloaded.
 */
@Deprecated
@Named
@Singleton