// region is valid only for CreateBucketAction.
	var region string
	if action == policy.CreateBucketAction {
		// To extract region from XML in request body, get copy of request body.
		payload, err := io.ReadAll(io.LimitReader(r.Body, maxLocationConstraintSize))
		if err != nil {
			authZLogIf(ctx, err, logger.ErrorKind)
			return ErrMalformedXML
		}

		// Populate payload to extract location constraint.

			origtarget := string(fsys[name].Data)
			if hdr.Linkname != origtarget {
				t.Fatalf("test fs has link content %s; archive header %v", origtarget, hdr.Linkname)
			}
		default:
			data, err := io.ReadAll(tr)
			if err != nil {
				t.Fatal(err)
			}
			origdata := fsys[name].Data
			if string(data) != string(origdata) {
				t.Fatalf("test fs has file content %v; archive header has %v", origdata, data)

		return ht.save(ctx)
	}
	return nil
}

// loadFormatErasure - loads format.json from disk.
func loadFormatErasure(disk StorageAPI, heal bool) (format *formatErasureV3, err error) {
	data, err := disk.ReadAll(context.TODO(), minioMetaBucket, formatConfigFile)
	if err != nil {
		// 'file not found' and 'volume not found' as
		// same. 'volume not found' usually means its a fresh disk.

    val zippedSize = zipped.size.toInt()
    writeMedium(frame, zippedSize)
    frame.writeByte(Http2.TYPE_DATA)
    frame.writeByte(FLAG_COMPRESSED)
    frame.writeInt(expectedStreamId and 0x7fffffff)
    zipped.readAll(frame)
    assertFailsWith<IOException> {
      reader.nextFrame(requireSettings = false, BaseTestHandler())
    }.also { expected ->
      assertThat(expected.message)

	rHdr, err := tr.Next()
	if err != nil {
		t.Fatalf("tr.Next: %v", err)
	}
	if !reflect.DeepEqual(rHdr, hdr) {
		t.Errorf("Header mismatch.\n got %+v\nwant %+v", rHdr, hdr)
	}
	rData, err := io.ReadAll(tr)
	if err != nil {
		t.Fatalf("Read: %v", err)
	}
	if !bytes.Equal(rData, data) {
		t.Errorf("Data mismatch.\n got %q\nwant %q", rData, data)
	}
}

type headerRoundTripTest struct {
	h  *Header

	ctx := r.Context()

	objectAPI, creds := validateAdminReq(ctx, w, r, policy.StartBatchJobAction)
	if objectAPI == nil {
		return
	}

	buf, err := io.ReadAll(xioutil.HardLimitReader(r.Body, humanize.MiByte*4))
	if err != nil {
		writeErrorResponseJSON(ctx, w, toAPIError(ctx, err), r.URL)
		return
	}

	user := creds.AccessKey
	if creds.ParentUser != "" {

		}
	}

	contentReader, err := s.adm.ExportIAM(ctx)
	if err != nil {
		c.Fatalf("export %d: Unable to export IAM: %v", caseNum, err)
	}
	defer contentReader.Close()

	expContent, err := io.ReadAll(contentReader)
	if err != nil {
		c.Fatalf("export %d: Unable to read exported content: %v", caseNum, err)
	}

	return expContent
}

type dummyCloser struct {
	io.Reader
}

				return
			}
		case "m":
			z.ScanMode, err = dc.ReadInt()
			if err != nil {
				err = msgp.WrapError(err, "ScanMode")
				return
			}
		case "c":
			if dc.IsNil() {
				err = dc.ReadNil()
				if err != nil {
					err = msgp.WrapError(err, "Cache")
					return
				}
				z.Cache = nil
			} else {
				if z.Cache == nil {
					z.Cache = new(dataUsageCache)
				}

				if err != nil {
					err = msgp.WrapError(err, "SmallerThan")
					return
				}
				z.SmallerThan = nil
			} else {
				if z.SmallerThan == nil {
					z.SmallerThan = new(string)
				}
				*z.SmallerThan, err = dc.ReadString()
				if err != nil {
					err = msgp.WrapError(err, "SmallerThan")
					return
				}
			}
		case "SkipErrs":
			if dc.IsNil() {
				err = dc.ReadNil()

			return n, cr.err
		}
	}

	if cap(cr.buffer) < size {
		cr.buffer = make([]byte, size)
	} else {
		cr.buffer = cr.buffer[:size]
	}

	// Now, we read the payload.
	_, err = io.ReadFull(cr.reader, cr.buffer)
	if err == io.EOF && size != 0 {
		err = io.ErrUnexpectedEOF
	}
	if err != nil && err != io.EOF {
		cr.err = err
		return n, cr.err
	}