// RegisterDecompressor registers or overrides a custom decompressor for a
// specific method ID. If a decompressor for a given method is not found,
// [Reader] will default to looking up the decompressor at the package level.
func (r *Reader) RegisterDecompressor(method uint16, dcomp Decompressor) {
	if r.decompressors == nil {
		r.decompressors = make(map[uint16]Decompressor)
	}
	r.decompressors[method] = dcomp
}

* Décompresser des corps de requête compressés en gzip.
* Journaliser automatiquement tous les corps de requête.

## Gérer les encodages personnalisés du corps de la requête { #handling-custom-request-body-encodings }

Voyons comment utiliser une sous-classe personnalisée de `Request` pour décompresser des requêtes gzip.

///

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.

            return new RequestParameter[0];
        }).orElse(new RequestParameter[0]);
    }

    /**
     * Decompresses GZIP-compressed data.
     *
     * @param compressed The GZIP-compressed data to decompress
     * @return Decompressed data
     * @throws IORuntimeException if decompression fails
     */
    protected byte[] gzipDecompress(final byte[] compressed) {

        byte[] compressed = searchHelper.gzipCompress(originalBytes);
        byte[] decompressed = searchHelper.gzipDecompress(compressed);

        assertEquals(testData, new String(decompressed));
        // For small strings, gzip overhead might make compressed data larger
        // So we just verify that compression/decompression works correctly
        assertNotNull(compressed);
        assertTrue(compressed.length > 0);

Bunu yaptığımızda `GzipRequest`, veriyi (gerekliyse) *path operations*'larımıza geçirmeden önce açma (decompress) işini üstlenir.

Bundan sonra tüm işleme mantığı aynıdır.

Ancak `GzipRequest.body` içindeki değişikliklerimiz sayesinde, request body gerektiğinde **FastAPI** tarafından yüklendiğinde otomatik olarak decompress edilir.

## Bir exception handler içinde request body'ye erişme { #accessing-the-request-body-in-an-exception-handler }

    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
        return self._body


class GzipRoute(APIRoute):
    def get_route_handler(self) -> Callable:
        original_route_handler = super().get_route_handler()

    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
        return self._body


class GzipRoute(APIRoute):
    def get_route_handler(self) -> Callable:
        original_route_handler = super().get_route_handler()

          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*/

## Rewriting Responses

If transparent compression was used, OkHttp will drop the corresponding response headers `Content-Encoding` and `Content-Length` because they don’t apply to the decompressed response body.

If a conditional GET was successful, responses from the network and cache are merged as directed by the spec.

## Follow-up Requests