## Accessing the request body in an exception handler

/// tip

To solve this same problem, it's probably a lot easier to use the `body` in a custom handler for `RequestValidationError` ([Handling Errors](../tutorial/handling-errors.md#use-the-requestvalidationerror-body){.internal-link target=_blank}).

But this example is still valid and it shows how to interact with the internal components.

///

errors.property_type_long={0}は数値です。
errors.property_type_float={0}は数値です。
errors.property_type_double={0}は数値です。
errors.property_type_date={0}は日付です。

errors.storage_file_upload_failure={0} のアップロードに失敗しました。
errors.storage_file_not_found=対象のファイルはストレージ内にありません。
errors.storage_file_download_failure={0} のダウンロードに失敗しました。
errors.storage_access_error=ストレージアクセスエラー: {0}
errors.storage_no_upload_file=アップロードするファイルを指定してください。

			<div>
				<la:info id="msg" message="true">
					<div class="alert alert-info">${msg}</div>
				</la:info>
				<la:errors header="errors.front_header" footer="errors.front_footer" prefix="errors.front_prefix"
					suffix="errors.front_suffix"
				/>
			</div>
			<div class="form-group row">
				<label for="as_q" class="col-lg-3 col-md-4 col-sm-5 col-12 col-form-label"><la:message

	}

	f := handlers.NewForwarder(&handlers.Forwarder{
		PassHost:     true,
		RoundTripper: ep.Transport,
		ErrorHandler: func(w http.ResponseWriter, r *http.Request, err error) {
			success = false
			if err != nil && !errors.Is(err, context.Canceled) {
				replLogIf(GlobalContext, err)
			}
		},
	})

	r.URL.Scheme = "http"
	if globalIsTLS {
		r.URL.Scheme = "https"
	}

		if err == nil {
			return files, gr.ObjInfo, nil
		}
		var terr zipindex.ErrNeedMoreData
		if errors.As(err, &terr) {
			size = int(terr.FromEnd)
			if size <= 0 || size > 100<<20 {
				return nil, ObjectInfo{}, errors.New("zip directory too large")
			}
		} else {
			return nil, ObjectInfo{}, err
		}
	}
}

	if err := r.Notify(ctx, ri); err != nil {
		batchLogIf(ctx, fmt.Errorf("unable to notify %v", err))
	}

	cancel()
	return nil
}

//msgp:ignore batchKeyRotationJobError
type batchKeyRotationJobError struct {
	Code           string
	Description    string
	HTTPStatusCode int
}

func (e batchKeyRotationJobError) Error() string {
	return e.Description
}

			}
			if err != nil {
				return fmt.Errorf("error (%s): %w", target.ID(), err)
			}
		} else {
			// Just for call init.
			// Ignore target is online or offline
			_, _ = target.IsActive()
		}
	}

	return nil
}

func fetchSubSysTargets(ctx context.Context, cfg config.Config, subSys string, transport *http.Transport) (targets []event.Target, err error) {

	"github.com/prometheus/client_golang/prometheus/promhttp"
)

type promLogger struct{}

func (p promLogger) Println(v ...interface{}) {
	metricsLogIf(GlobalContext, fmt.Errorf("metrics handler error: %v", v))
}

type metricsV3Server struct {
	registry *prometheus.Registry
	opts     promhttp.HandlerOpts
	auth     func(http.Handler) http.Handler

	metricsData *metricsV3Collection
}

var (

		resExpected string
		errExpected error
	}{
		{"abcd", 1, 1, "a", nil},
		{"abcd", -1, 1, "a", nil},
		{"abcd", 999, 999, "", nil},
		{"", 999, 999, "", nil},
		{"测试abc", 1, 1, "测", nil},
		{"测试abc", 5, 5, "c", nil},
	}

	for i, tc := range evalCases {
		res, err := evalSQLSubstring(tc.s, tc.startIdx, tc.length)
		if res != tc.resExpected || err != tc.errExpected {
			t.Errorf("Eval Case %d failed: %v %v", i, res, err)
		}

func (x *xlMetaV2VersionHeader) unmarshalV(v uint8, bts []byte) (o []byte, err error) {
	switch v {
	case 1:
		return x.unmarshalV1(bts)
	case 2:
		x2 := xlMetaV2VersionHeaderV2{xlMetaV2VersionHeader: x}
		return x2.UnmarshalMsg(bts)
	case xlHeaderVersion:
		return x.UnmarshalMsg(bts)
	}
	return bts, fmt.Errorf("unknown xlHeaderVersion: %d", v)
}

// unmarshalV1 decodes version 1, never released.