val response =
      response("https://httpbin.org/gzip", s.decodeHex()) {
        header("Content-Encoding", "gzip")
      }

    val uncompressed = brotliInterceptor.decompress(response)

    val responseString = uncompressed.body.string()
    assertThat(responseString).contains("\"gzipped\": true,")
    assertThat(responseString).contains("\"Accept-Encoding\": \"br,gzip\"")
  }

  @Test
  fun testNoUncompress() {

## `GZipMiddleware` { #gzipmiddleware }

Handles GZip responses for any request that includes `"gzip"` in the `Accept-Encoding` header.

The middleware will handle both standard and streaming responses.

{* ../../docs_src/advanced_middleware/tutorial003_py310.py hl[2,6] *}

The following arguments are supported:

* `minimum_size` - Do not GZip responses that are smaller than this minimum size in bytes. Defaults to `500`.

import gzip
from collections.abc import Callable

from fastapi import Body, FastAPI, Request, Response
from fastapi.routing import APIRoute


class GzipRequest(Request):
    async def body(self) -> bytes:
        if not hasattr(self, "_body"):
            body = await super().body()
            if "gzip" in self.headers.getlist("Content-Encoding"):
                body = gzip.decompress(body)
            self._body = body

import gzip
from collections.abc import Callable
from typing import Annotated

from fastapi import Body, FastAPI, Request, Response
from fastapi.routing import APIRoute


class GzipRequest(Request):
    async def body(self) -> bytes:
        if not hasattr(self, "_body"):
            body = await super().body()
            if "gzip" in self.headers.getlist("Content-Encoding"):
                body = gzip.decompress(body)

  }

  @Test
  fun gzipThroughCall() {
    val gzip = CompressionInterceptor(Gzip)
    val client =
      clientTestRule
        .newClientBuilder()
        .addInterceptor(gzip)
        .addInterceptor { chain ->
          assertThat(chain.request().header("Accept-Encoding")).isEqualTo("gzip")

          Response
            .Builder()
            .request(chain.request())

import okio.ByteString.Companion.EMPTY
import okio.ByteString.Companion.encodeUtf8
import okio.Sink
import okio.buffer
import okio.gzip
import org.junit.jupiter.api.Test

class ZstdInterceptorTest {
  val zstdInterceptor = CompressionInterceptor(Zstd, Gzip)

  @Test
  fun testDecompressZstd() {
    val s = "hello zstd world".encodeUtf8().zstdCompress()

    val response =
      response("https://example.com/", s) {

            .gzip()
            .build(),
        ).execute()
    val responseBody = response.body
    assertThat(responseBody.string(), "Expected response body to be valid")
      .isEqualTo("Uncompressed")
    responseBody.close()
    networkLogs
      .assertLogEqual("--> POST $url http/1.1")
      .assertLogEqual("Content-Encoding: gzip")
      .assertLogEqual("Transfer-Encoding: chunked")

        .post("This is the original message".toRequestBody())
        .gzip()
        .gzip()
        .build()
    }.also {
      assertThat(it).hasMessage("Content-Encoding already set: gzip")
    }
  }

  @Test
  fun curlGet() {
    val request =
      Request
        .Builder()
        .url("https://example.com")
        .header("Authorization", "Bearer abc123")
        .build()

* Converting non-JSON request bodies to JSON (e.g. [`msgpack`](https://msgpack.org/index.html)).
* Decompressing gzip-compressed request bodies.
* Automatically logging all request bodies.

## Handling custom request body encodings { #handling-custom-request-body-encodings }

Let's see how to make use of a custom `Request` subclass to decompress gzip requests.

And an `APIRoute` subclass to use that custom request class.

- UTF-8 is the only encoding type the Select API supports.
- GZIP or BZIP2 - CSV and JSON files can be compressed using GZIP, BZIP2, [ZSTD](https://facebook.github.io/zstd/), and streaming formats of [LZ4](https://lz4.github.io/lz4/), [S2](https://github.com/klauspost/compress/tree/master/s2#s2-compression) and [SNAPPY](http://google.github.io/snappy/).