### Úsalo

Ahora puedes pasar ese `oauth2_scheme` en una dependencia con `Depends`.

{* ../../docs_src/security/tutorial001_an_py39.py hl[12] *}

Esta dependencia proporcionará un `str` que se asigna al parámetro `token` de la *path operation function*.

**FastAPI** sabrá que puede usar esta dependencia para definir un "security scheme" en el esquema OpenAPI (y en los docs automáticos del API).

  id("binary-compatibility-validator")
}

project.applyOsgi(
  "Export-Package: okhttp3.logging",
  "Automatic-Module-Name: okhttp3.logging",
  "Bundle-SymbolicName: com.squareup.okhttp3.logging"
)

dependencies {
  "friendsApi"(projects.okhttp)

  testImplementation(libs.junit)
  testImplementation(projects.mockwebserver3)
  testImplementation(projects.mockwebserver3Junit5)
  testImplementation(projects.okhttpTestingSupport)

A common choice is Jinja2, the same one used by Flask and other tools.

There are utilities to configure it easily that you can use directly in your **FastAPI** application (provided by Starlette).

## Install dependencies { #install-dependencies }

Make sure you create a [virtual environment](../virtual-environments.md){.internal-link target=_blank}, activate it, and install `jinja2`:

<div class="termy">

```console
$ pip install jinja2

plugins {
  kotlin("jvm")
  id("ru.vyarus.animalsniffer")
}

dependencies {
  api(libs.squareup.okio)
  api(libs.squareup.kotlinPoet)
  testImplementation(libs.assertk)
  testImplementation(libs.junit.jupiter.api)
  testImplementation(libs.junit.jupiter.params)

  testImplementation(rootProject.libs.junit.jupiter.engine)
}

animalsniffer {
  isIgnoreFailures = true

                    <classpathScope>test</classpathScope>
                </configuration>
            </plugin>
        </plugins>
    </build>

    <dependencies>
        <dependency>
            <groupId>org.jetbrains.teamcity</groupId>
            <artifactId>server-api</artifactId>
            <version>${teamcity.dsl.version}</version>
            <scope>test</scope>

# `HTTPConnection` class

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`.

You can import it from `fastapi.requests`:

```python
from fastapi.requests import HTTPConnection
```

plugins {
  kotlin("jvm")
  id("com.google.devtools.ksp")
}

dependencies {
  "friendsImplementation"(projects.okhttp)
  implementation(projects.mockwebserver)
  implementation(projects.okhttpTestingSupport)
  implementation(projects.okhttpTls)
  implementation(libs.animalsniffer.annotations)
  implementation(libs.squareup.moshi)
  implementation(libs.squareup.okio.fakefilesystem)
  ksp(libs.squareup.moshi.compiler)
}

java {

GOLANGCI = $(GOLANGCI_DIR)/golangci-lint

all: build

checks: ## check dependencies
	@echo "Checking dependencies"
	@(env bash $(PWD)/buildscripts/checkdeps.sh)

help: ## print this help
	@grep -E '^[a-zA-Z_-]+:.*?## .*$$' Makefile | awk 'BEGIN {FS = ":.*?## "}; {printf "\033[36m%-40s\033[0m %s\n", $$1, $$2}'

getdeps: ## fetch necessary dependencies
	@mkdir -p ${GOPATH}/bin

  id("ru.vyarus.animalsniffer")
}

project.applyOsgi(
  "Export-Package: okhttp3.tls",
  "Automatic-Module-Name: okhttp3.tls",
  "Bundle-SymbolicName: com.squareup.okhttp3.tls"
)

dependencies {
  api(libs.squareup.okio)
  "friendsImplementation"(projects.okhttp)
  compileOnly(libs.animalsniffer.annotations)

  testImplementation(projects.okhttpTestingSupport)

{
    "name": "s3-zip-example",
    "version": "1.0.0",
    "main": "main.js",
    "dependencies": {
        "aws-sdk": "^2.924.0"
    }