# WebSockets

여러분은 **FastAPI**에서 <a href="https://developer.mozilla.org/en-US/docs/Web/API/WebSockets_API" class="external-link" target="_blank">WebSockets</a>를 사용할 수 있습니다.

## `WebSockets` 설치

[가상 환경](../virtual-environments.md){.internal-link target=_blank)를 생성하고 활성화한 다음, `websockets`를 설치하세요:

<div class="termy">

```console
$ pip install websockets

---> 100%
```

</div>

## WebSockets 클라이언트

### 프로덕션 환경에서

darwin=false;
mingw=false
case "`uname`" in
  CYGWIN*) cygwin=true ;;
  MINGW*) mingw=true;;
  Darwin*) darwin=true
    # Use /usr/libexec/java_home if available, otherwise fall back to /Library/Java/Home
    # See https://developer.apple.com/library/mac/qa/qa1170/_index.html
    if [ -z "$JAVA_HOME" ]; then
      if [ -x "/usr/libexec/java_home" ]; then
        export JAVA_HOME="`/usr/libexec/java_home`"
      else

darwin=false
mingw=false
case "$(uname)" in
CYGWIN*) cygwin=true ;;
MINGW*) mingw=true ;;
Darwin*)
  darwin=true
  # Use /usr/libexec/java_home if available, otherwise fall back to /Library/Java/Home
  # See https://developer.apple.com/library/mac/qa/qa1170/_index.html
  if [ -z "$JAVA_HOME" ]; then
    if [ -x "/usr/libexec/java_home" ]; then
      JAVA_HOME="$(/usr/libexec/java_home)"
      export JAVA_HOME
    else

**FastAPI** has a very powerful but intuitive **<abbr title="also known as components, resources, providers, services, injectables">Dependency Injection</abbr>** system.

It is designed to be very simple to use, and to make it very easy for any developer to integrate other components with **FastAPI**.

## What is "Dependency Injection" { #what-is-dependency-injection }

/// note | Technical Details

You could also use `from starlette.responses import HTMLResponse`.

**FastAPI** provides the same `starlette.responses` as `fastapi.responses` just as a convenience for you, the developer. But most of the available responses come directly from Starlette.

///

### `Response` { #response }

The main `Response` class, all the other responses inherit from it.

You can return it directly.

 *       initialize all possible subscribers at startup time.
 *   <li>It uses reflection in ways that break when code is processed by optimizers/minimizers like
 *       <a href="https://developer.android.com/studio/build/shrink-code">R8 and Proguard</a>.
 *   <li>It doesn't offer a way to wait for multiple events before taking action. For example, it

```JSON
{
  "username": "johndoe",
  "email": "******@****.***",
  "full_name": "John Doe",
  "disabled": false
}
```

<img src="/img/tutorial/security/image09.png">

If you open the developer tools, you could see how the data sent only includes the token, the password is only sent in the first request to authenticate the user and get that access token, but not afterwards:

<img src="/img/tutorial/security/image10.png">

[Gradle module metadata]: https://docs.gradle.org/current/userguide/publishing_gradle_module_metadata.html
[Ktor]: https://ktor.io/
[Retrofit]: https://square.github.io/retrofit/
[annotation_1_9_1]: https://developer.android.com/jetpack/androidx/releases/annotation#annotation-1.9.1
[assertk]: https://github.com/willowtreeapps/assertk
[coroutines_1_10_2]: https://github.com/Kotlin/kotlinx.coroutines/releases/tag/1.10.2

build:cuda_clang --@local_config_cuda//:cuda_compiler=clang
build:cuda_clang --copt=-Qunused-arguments
# Select supported compute capabilities (supported graphics cards).
# This is the same as the official TensorFlow builds.
# See https://developer.nvidia.com/cuda-gpus#compute
# `compute_XY` enables PTX embedding in addition to SASS. PTX
# is forward compatible beyond the current compute capability major
# release while SASS is only forward compatible inside the current

 * See [NativeCrypto.java][conscrypt_providers] which lists the cipher suites supported by
 * Conscrypt.
 *
 * [iana_tls_parameters]: https://www.iana.org/assignments/tls-parameters/tls-parameters.xhtml
 * [sslengine]: https://developer.android.com/reference/javax/net/ssl/SSLEngine.html
 * [oracle_providers]: https://docs.oracle.com/javase/10/security/oracle-providers.htm