header  *Header
			content []byte
		}
		files := []file{}
		for {
			hdr, err := r.Next()
			if err == io.EOF {
				break
			}
			if err != nil {
				return
			}
			buf := bytes.NewBuffer(nil)
			if _, err := io.Copy(buf, r); err != nil {
				continue
			}
			files = append(files, file{header: hdr, content: buf.Bytes()})
		}

		// If we were unable to read anything out of the archive don't

		metadata = make(map[string]string)
	}

	wantCRC, err := hash.GetContentChecksum(hdr)
	if err != nil {
		return opts, fmt.Errorf("invalid/unknown checksum sent: %v", err)
	}
	etag := strings.TrimSpace(hdr.Get(xhttp.MinIOSourceETag))

	if crypto.S3KMS.IsRequested(hdr) {
		keyID, context, err := crypto.S3KMS.ParseHTTP(hdr)
		if err != nil {
			return ObjectOptions{}, err
		}

				Idx      int
				Header   json.RawMessage
				Metadata json.RawMessage
			}
			versions := make([]version, nVers)
			e = decodeVersions(v, nVers, func(idx int, hdr, meta []byte) error {
				var header xlMetaV2VersionHeaderV2
				if _, e := header.UnmarshalMsg(hdr); e != nil {
					return e
				}
				b, e := header.MarshalJSON()
				if e != nil {
					return e
				}
				var buf bytes.Buffer

					b = nbuf
				}

				hdr, v, err := decodeXLHeaders(v)
				if err != nil {
					return nil, err
				}
				type version struct {
					Idx      int
					Header   json.RawMessage
					Metadata json.RawMessage
				}
				versions := make([]version, hdr.versions)
				headerVer := hdr.headerVer
				err = decodeVersions(v, hdr.versions, func(idx int, hdr, meta []byte) error {

of Go in effect in the referring file. (The effective version is determined
by the `go` directive in the file's enclosing `go.mod` file, and
by any [`//go:build` constraints](https://pkg.go.dev/cmd/go#hdr-Build_constraints)
in the file.)

For example, it will report a diagnostic for a reference to the
`reflect.TypeFor` function (introduced in go1.22) from a file in a
module whose go.mod file specifies `go 1.21`.

	var b bytes.Buffer
	tw := NewWriter(&b)
	hdr := &Header{
		Name:       "file.txt",
		Uid:        1 << 21, // Too big for 8 octal digits
		Size:       int64(len(data)),
		ModTime:    time.Now().Round(time.Second),
		PAXRecords: map[string]string{"uid": "2097152"},
		Format:     FormatPAX,
		Typeflag:   TypeReg,
	}
	if err := tw.WriteHeader(hdr); err != nil {
		t.Fatalf("tw.WriteHeader: %v", err)
	}

			dst = dst[:0]
			for {
				hdr, err := wsReader.NextFrame()
				if err != nil {
					return nil, err
				}
				if hdr.OpCode.IsControl() {
					if err := controlHandler(hdr, &wsReader); err != nil {
						return nil, err
					}
					continue
				}
				if hdr.OpCode&want == 0 {
					if err := wsReader.Discard(); err != nil {
						return nil, err

						if v == latestCount && latest.header.sortsBefore(k) {
							// Tiebreak, use sort.
							continue
						}
						for _, a := range tops {
							hdr := a.header
							if !strict {
								hdr.Signature = [4]byte{}
							}
							if hdr == k {
								latest = a
							}
						}
						latestCount = v
					}
					break
				}
			}
			if latestCount >= quorum {

func getContentChecksum(h http.Header) (t ChecksumType, s string) {
	t = ChecksumNone
	alg := h.Get(xhttp.AmzChecksumAlgo)
	if alg != "" {
		t |= NewChecksumType(alg)
		if t.IsSet() {
			hdr := t.Key()
			if s = h.Get(hdr); s == "" {
				return ChecksumNone, ""
			}
		}
		return t, s
	}
	checkType := func(c ChecksumType) {
		if got := h.Get(c.Key()); got != "" {
			// If already set, invalid

}

func extractMetadata(ctx context.Context, mimesHeader ...textproto.MIMEHeader) (metadata map[string]string, err error) {
	metadata = make(map[string]string)

	for _, hdr := range mimesHeader {
		// Extract all query values.
		err = extractMetadataFromMime(ctx, hdr, metadata)
		if err != nil {
			return nil, err
		}
	}

	// Set content-type to default value if it is not set.