```

## Resumen

Puedes usar **modelos de Pydantic** para declarar **parámetros query** en **FastAPI**. 😎

/// tip | Consejo

Alerta de spoiler: también puedes usar modelos de Pydantic para declarar cookies y headers, pero leerás sobre eso más adelante en el tutorial. 🤫

      // Parse each header.
      for (i in 0 until responseHeaders.size) {
        if (!responseHeaders.name(i).equals(HEADER_WEB_SOCKET_EXTENSION, ignoreCase = true)) {
          continue // Not a header we're interested in.
        }
        val header = responseHeaders.value(i)

        // Parse each extension.
        var pos = 0
        while (pos < header.length) {

   */
  private fun decodeHeaderAsJavaNetCookies(
    url: HttpUrl,
    header: String,
  ): List<Cookie> {
    val result = mutableListOf<Cookie>()
    var pos = 0
    val limit = header.length
    var pairEnd: Int
    while (pos < limit) {
      pairEnd = header.delimiterOffset(";,", pos, limit)
      val equalsSign = header.delimiterOffset('=', pos, pairEnd)

  override fun intercept(chain: Interceptor.Chain): Response =
    if (algorithms.isNotEmpty() && chain.request().header("Accept-Encoding") == null) {
      val request =
        chain
          .request()
          .newBuilder()
          .header("Accept-Encoding", acceptEncoding)
          .build()

      val response = chain.proceed(request)

      decompress(response)
    } else {

import java.util.Arrays
import java.util.concurrent.TimeUnit
import kotlin.test.assertFailsWith
import mockwebserver3.MockResponse
import mockwebserver3.MockWebServer
import mockwebserver3.junit5.StartStop
import okhttp3.Headers.Companion.headersOf
import okhttp3.internal.DoubleInetAddressDns
import okhttp3.internal.connection.RealConnectionPool.Companion.get
import okhttp3.testing.Flaky
import okhttp3.testing.PlatformRule

    ]
}
```

## Summary { #summary }

You can use **Pydantic models** to declare **query parameters** in **FastAPI**. 😎

/// tip

Spoiler alert: you can also use Pydantic models to declare cookies and headers, but you will read about that later in the tutorial. 🤫

# Usar el Request Directamente

Hasta ahora, has estado declarando las partes del request que necesitas con sus tipos.

Tomando datos de:

* El path como parámetros.
* Headers.
* Cookies.
* etc.

Y al hacerlo, **FastAPI** está validando esos datos, convirtiéndolos y generando documentación para tu API automáticamente.

Pero hay situaciones donde podrías necesitar acceder al objeto `Request` directamente.

  // Optional: confirm that your app made the HTTP requests you were expecting.
  val request1 = server.takeRequest()
  assertEquals("/v1/chat/messages/", request1.url.encodedPath)
  assertNotNull(request1.headers["Authorization"])

  val request2 = server.takeRequest()
  assertEquals("/v1/chat/messages/2", request2.url.encodedPath)

  val request3 = server.takeRequest()

    }
  }

  private fun headersToList(response: MockResponse): List<String> {
    val headers = response.headers
    val size = headers.size
    val headerList: MutableList<String> = ArrayList(size)
    for (i in 0 until size) {
      headerList.add(headers.name(i) + ": " + headers.value(i))
    }
    return headerList
  }

  @Test
  fun shutdownWithoutStart() {

## Version 5.0.0-alpha.3

_2021-11-22_

 *  Fix: Change `Headers.toString()` to redact authorization and cookie headers.
 *  Fix: Don't do DNS to get the hostname for `RecordedRequest.requestUrl`. This was doing a DNS
    lookup for the local hostname, but we really just wanted the `Host` header.
 *  Fix: Don't crash with a `InaccessibleObjectException` when detecting the platform trust manager