For example:

* <a href="https://docs.sentry.io/platforms/python/guides/fastapi/" class="external-link" target="_blank">Sentry</a>
* <a href="https://github.com/encode/uvicorn/blob/master/uvicorn/middleware/proxy_headers.py" class="external-link" target="_blank">Uvicorn's `ProxyHeadersMiddleware`</a>
* <a href="https://github.com/florimondmanca/msgpack-asgi" class="external-link" target="_blank">MessagePack</a>

      )

    private val CRLF = "\r\n".encodeUtf8()

    @Throws(IOException::class)
    private fun BufferedSource.readData(data: Buffer) {
      data.writeByte('\n'.code)
      readFully(data, indexOfElement(CRLF))
      select(options) // Skip the newline bytes.
    }

    @Throws(IOException::class)
    private fun BufferedSource.readRetryMs(): Long {
      val retryString = readUtf8LineStrict()

### Testen Sie es

Öffnen Sie Ihren Browser unter <a href="http://127.0.0.1:8000" class="external-link" target="_blank">http://127.0.0.1:8000.</a>

Sie werden folgende JSON-Response sehen:

```JSON
{"message": "Hello World"}
```

### Interaktive API-Dokumentation

Gehen Sie als Nächstes auf <a href="http://127.0.0.1:8000/docs" class="external-link" target="_blank">http://127.0.0.1:8000/docs </a>.

<div class="termy">

```console
$ pip install fastapi

---> 100%
```

</div>

你还会需要一个 ASGI 服务器，生产环境可以使用 <a href="https://www.uvicorn.org" class="external-link" target="_blank">Uvicorn</a> 或者 <a href="https://gitlab.com/pgjones/hypercorn" class="external-link" target="_blank">Hypercorn</a>。

<div class="termy">

```console
$ pip install "uvicorn[standard]"

---> 100%
```

</div>

* <a href="https://hub.docker.com/_/postgres" class="external-link" target="_blank">PostgreSQL</a>
* <a href="https://hub.docker.com/_/mysql" class="external-link" target="_blank">MySQL</a>
* <a href="https://hub.docker.com/_/mongo" class="external-link" target="_blank">MongoDB</a>
* <a href="https://hub.docker.com/_/redis" class="external-link" target="_blank">Redis</a>

и т.п.

import kotlin.annotation.AnnotationRetention.BINARY
import kotlin.annotation.AnnotationTarget.CLASS
import kotlin.annotation.AnnotationTarget.CONSTRUCTOR
import kotlin.annotation.AnnotationTarget.FUNCTION

@Retention(BINARY)
@Documented
@Target(CONSTRUCTOR, CLASS, FUNCTION)

## Testing locally with Traefik

You can easily run the experiment locally with a stripped path prefix using <a href="https://docs.traefik.io/" class="external-link" target="_blank">Traefik</a>.

<a href="https://github.com/containous/traefik/releases" class="external-link" target="_blank">Download Traefik</a>, it's a single binary, you can extract the compressed file and run it directly from the terminal.

```Python hl_lines="6-7"
{!../../../docs_src/path_params/tutorial001.py!}
```

La valeur du paramètre `item_id` sera transmise à la fonction dans l'argument `item_id`.

import okio.Buffer
import okio.BufferedSource
import okio.ByteString
import okio.ByteString.Companion.decodeHex
import okio.ForwardingSource
import okio.buffer
import org.junit.jupiter.api.Test

class ResponseBodyJvmTest {
  @Test
  fun stringEmpty() {
    val body = body("")
    assertThat(body.string()).isEqualTo("")
  }

  @Test
  fun stringLooksLikeBomButTooShort() {
    val body = body("000048")

Именно поэтому, FastAPI сам предоставляет альтернативную документацию API (используя ReDoc), которую можно получить по адресу: <a href="http://127.0.0.1:8000/redoc" class="external-link" target="_blank">http://127.0.0.1:8000/redoc</a>.