* @param algorithm the compression algorithm that was used
     * @return the decompressed data
     * @throws CIFSException if decompression fails
     */
    byte[] decompress(byte[] compressedData, int algorithm) throws CIFSException;

    /**
     * Decompresses data with offset and length parameters.
     *
     * @param compressedData the compressed data buffer
     * @param offset the offset in the buffer

      val response = chain.proceed(request)

      decompress(response)
    } else {
      chain.proceed(chain.request())
    }

  /**
   * Returns a decompressed copy of the Response, typically via a streaming Source.
   * If no known decompression or the response is not compressed, returns the response unmodified.
   */
  internal fun decompress(response: Response): Response {
    if (!response.promisesBody()) {

///

First, we create a `GzipRequest` class, which will overwrite the `Request.body()` method to decompress the body in the presence of an appropriate header.

If there's no `gzip` in the header, it will not try to decompress the body.

That way, the same route class can handle gzip compressed or uncompressed requests.

public final class okhttp3/zstd/Zstd : okhttp3/CompressionInterceptor$DecompressionAlgorithm {
	public static final field INSTANCE Lokhttp3/zstd/Zstd;
	public fun decompress (Lokio/BufferedSource;)Lokio/Source;
	public fun getEncoding ()Ljava/lang/String;

public final class okhttp3/brotli/Brotli : okhttp3/CompressionInterceptor$DecompressionAlgorithm {
	public static final field INSTANCE Lokhttp3/brotli/Brotli;
	public fun decompress (Lokio/BufferedSource;)Lokio/Source;
	public fun getEncoding ()Ljava/lang/String;
}

public final class okhttp3/brotli/BrotliInterceptor : okhttp3/CompressionInterceptor {
	public static final field INSTANCE Lokhttp3/brotli/BrotliInterceptor;

          python-version-file: ".python-version"
      - name: Install build dependencies
        run: pip install build
      - name: Build source distribution
        run: python -m build --sdist
      - name: Decompress source distribution
        run: |
          cd dist
          tar xvf fastapi*.tar.gz
      - name: Install test dependencies
        run: |
          cd dist/fastapi*/

import okio.BufferedSource
import okio.GzipSource
import okio.Source

object Gzip : DecompressionAlgorithm {
  override val encoding: String get() = "gzip"

  override fun decompress(compressedSource: BufferedSource): Source = GzipSource(compressedSource)

        header("Content-Encoding", "zstd")
      }

    val decompressed = zstdInterceptor.decompress(response)
    assertThat(decompressed.header("Content-Encoding")).isNull()

    assertFailsWith<IOException> {
      decompressed.body.string()
    }.also { ioe ->
      assertThat(ioe).hasMessage("zstd decompress failed: Unknown frame descriptor")
    }
  }

  @Test

import okio.Source
import okio.source
import org.brotli.dec.BrotliInputStream

object Brotli : CompressionInterceptor.DecompressionAlgorithm {
  override val encoding: String get() = "br"

  override fun decompress(compressedSource: BufferedSource): Source = BrotliInputStream(compressedSource.inputStream()).source()

/**
 * Support for Zstandard encoding. Use via the [CompressionInterceptor].
 */
object Zstd : CompressionInterceptor.DecompressionAlgorithm {
  override val encoding: String get() = "zstd"

  override fun decompress(compressedSource: BufferedSource): Source = compressedSource.zstdDecompress()