// It is mainly used to provide a high-level io.Reader
// access to the ETag computed by a low-level io.Reader:
//
//	content := etag.NewReader(r.Body, nil)
//
//	compressedContent := Compress(content)
//	encryptedContent := Encrypt(compressedContent)
//
//	// Now, we need an io.Reader that can access
//	// the ETag computed over the content.
//	reader := etag.Wrap(encryptedContent, content)

package cmd

import (
	"crypto/subtle"
	"encoding/hex"
	"io"
	"net/http"
	"net/url"
	"strconv"
	"strings"
	"time"

	"github.com/klauspost/compress/gzhttp"
	"github.com/lithammer/shortuuid/v4"
	miniogo "github.com/minio/minio-go/v7"
	"github.com/minio/minio-go/v7/pkg/credentials"
	"github.com/minio/mux"
	"github.com/minio/pkg/v3/policy"

		shardSize:    shardSize,
		canClose:     &sync.WaitGroup{},
		byteBuf:      buf,
	}
	bw.canClose.Add(1)
	go func() {
		defer bw.canClose.Done()

		totalFileSize := int64(-1) // For compressed objects length will be unknown (represented by length=-1)
		if length != -1 {
			bitrotSumsTotalSize := ceilFrac(length, shardSize) * int64(h.Size()) // Size used for storing bitrot checksums.

		ver.meta = meta

		// Fix inconsistent compression index due to https://github.com/minio/minio/pull/20575
		// First search marshaled content for encoded values.
		// We have bumped metaV to make this check cheaper.
		if metaV < 3 && ver.header.Type == ObjectType && bytes.Contains(meta, []byte("\xa7PartIdx")) &&
			bytes.Contains(meta, []byte("\xbcX-Minio-Internal-compression\xc4\x15klauspost/compress/s2")) {
			// Likely candidate...

 * `server_max_window_bits`. This harms our ability to support these parameters:
 *
 *  * If `client_max_window_bits` is less than 15, OkHttp must close the web socket with code 1010.
 *    Otherwise it would compress values in a way that servers could not decompress.
 *  * If `server_max_window_bits` is less than 15, OkHttp will waste memory on an oversized buffer.
 *
 * See [RFC 7692, 7.1][rfc_7692] for details on negotiation process.
 *

        listener = webSocketResponse.webSocketListener!!,
        random = SecureRandom(),
        pingIntervalMillis = 0,
        extensions = WebSocketExtensions.parse(webSocketResponse.headers),
        // Compress all messages if compression is enabled.
        minimumDeflateSize = 0L,
        webSocketCloseTimeout = RealWebSocket.CANCEL_AFTER_CLOSE_MILLIS,
      )
    val name = "MockWebServer WebSocket ${request.url.encodedPath}"

      apply {
        webSocketCloseTimeout = checkDuration("duration", duration)
      }

    /**
     * Sets minimum outbound web socket message size (in bytes) that will be compressed.
     *
     * Set to 0 to enable compression for all outbound messages.
     *
     * 1024 by default.
     */
    fun minWebSocketMessageToCompress(bytes: Long) =
      apply {
        require(bytes >= 0) {

```

## Test Requirements

### Dependencies:
- JUnit 4.x
- DBFlute UTFlute (PlainTestCase)
- Apache POI (for MS Office tests)
- Apache Commons Compress (for archive tests)

### Test Resources:
- `extractor/msoffice/test.doc`
- `extractor/msoffice/test.xls`
- `extractor/msoffice/test.ppt`
- `extractor/test.txt`
- `extractor/zip/test.zip`

    /** Directory attribute */
    int ATTR_DIRECTORY = 0x10;
    /** Archive attribute */
    int ATTR_ARCHIVE = 0x20;

    // extended file attribute encoding(others same as above)
    /** Compressed file attribute */
    int ATTR_COMPRESSED = 0x800;
    /** Normal file attribute */
    int ATTR_NORMAL = 0x080;
    /** Temporary file attribute */
    int ATTR_TEMPORARY = 0x100;

    val server = serverListener.assertOpen()

    // Server to client message big enough to be compressed.
    val message1 = repeat('a', RealWebSocket.DEFAULT_MINIMUM_DEFLATE_SIZE.toInt())
    server.send(message1)
    clientListener.assertTextMessage(message1)

    // Client to server message big enough to be compressed.
    val message2 = repeat('b', RealWebSocket.DEFAULT_MINIMUM_DEFLATE_SIZE.toInt())