}

    /**
     * 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) {
        try (final ByteArrayInputStream bis = new ByteArrayInputStream(compressed);

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.

{* ../../docs_src/custom_request_and_route/tutorial001_an_py310.py hl[9:16] *}

### Create a custom `GzipRoute` class { #create-a-custom-gziproute-class }

    for a delimiter when we only needed to scan enough to return a result.

 *  Fix: Don't double-compress the public suffix database. OkHttp is usually distributed in a
    compressed file (like a JAR or APK), so compressing its internal data was redundant.

 *  Fix: Call `ProxySelector.connectFailed()` when a connection's initial TCP handshake fails.

        } catch (final Exception e) {
            throw new CrawlingAccessException("Failed to parse " + url, e);
        }
    }

    /**
     * Decodes a similar document hash from its compressed and encoded form.
     * Reverses the encoding process applied by encodeSimilarDocHash.
     *
     * @param hash the encoded hash string to decode

<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.

Then create a file `traefik.toml` with:

```TOML hl_lines="3"
[entryPoints]
  [entryPoints.http]
    address = ":9999"

[providers]

When you run:

<div class="termy">

```console
// Don't run this now, it's just an example 🤓
$ pip install "fastapi[standard]"
---> 100%
```

</div>

That will download a compressed file with the FastAPI code, normally from <a href="https://pypi.org/project/fastapi/" class="external-link" target="_blank">PyPI</a>.

It will also **download** files for other packages that FastAPI depends on.

			ModTime:  time.Unix(0, 0),
			PAXRecords: map[string]string{
				"path": strings.Repeat("123456789/", 30),
			},
			Format: FormatPAX,
		}},
	}, {
		// Small compressed file that uncompresses to
		// a file with a very large GNU 1.0 sparse map.
		file: "testdata/gnu-sparse-many-zeros.tar.bz2",
		err:  errSparseTooLong,
	}}

	for _, v := range vectors {

application/x-ibooks+zip=ibooks\n\
text/plain=txt\n\
application/rtf=rtf\n\
application/vnd.ms-htmlhelp=chm\n\
application/zip=zip\n\
application/x-7z-comressed=7z\n\
application/x-bzip=bz\n\
application/x-bzip2=bz2\n\
application/x-tar=tar\n\
application/x-rar-compressed=rar\n\
video/3gp=3gp\n\
video/3g2=3g2\n\
video/x-msvideo=avi\n\
video/x-flv=flv\n\
video/mpeg=mpeg\n\
video/mp4=mp4\n\
video/ogv=ogv\n\

four coefficients per five bytes. // // It implements Compress₁₀, according to FIPS 203, Definition 4.7, // followed by ByteEncode₁₀, according to FIPS 203, Algorithm 5. func ringCompressAndEncod(s []byte, f ringElement) []byte { s, b := sliceForAppend(s, encodingSize10) for i := 0; i < n; i += 4 { var x uint64 x |= uint64(compress(f[i], 10)) x |= uint64(compress(f[i+1], 10)) << 10 x |= uint64(compress(f[i+2], 10)) << 20 x |= uint64(compress(f[i+3], 10)) << 30 b[0] = uint8(x) b[1] = uint8(x >> 8)...

     * application/rtf=rtf<br>
     * application/vnd.ms-htmlhelp=chm<br>
     * application/zip=zip<br>
     * application/x-7z-comressed=7z<br>
     * application/x-bzip=bz<br>
     * application/x-bzip2=bz2<br>
     * application/x-tar=tar<br>
     * application/x-rar-compressed=rar<br>
     * video/3gp=3gp<br>
     * video/3g2=3g2<br>
     * video/x-msvideo=avi<br>
     * video/x-flv=flv<br>