diff --git a/errors/gerror/gerror.go b/errors/gerror/gerror.go
index 282dcb40a..95a2494a2 100644
--- a/errors/gerror/gerror.go
+++ b/errors/gerror/gerror.go
@@ -17,36 +17,6 @@ import (
 	"github.com/gogf/gf/v2/errors/gcode"
 )
 
-// iCode is the interface for Code feature.
-type iCode interface {
-	Error() string
-	Code() gcode.Code
-}
-
-// iStack is the interface for Stack feature.
-type iStack interface {
-	Error() string
-	Stack() string
-}
-
-// iCause is the interface for Cause feature.
-type iCause interface {
-	Error() string
-	Cause() error
-}
-
-// iCurrent is the interface for Current feature.
-type iCurrent interface {
-	Error() string
-	Current() error
-}
-
-// iNext is the interface for Next feature.
-type iNext interface {
-	Error() string
-	Next() error
-}
-
 // New creates and returns an error which is formatted from given text.
 func New(text string) error {
 	return &Error{
@@ -305,8 +275,39 @@ func Next(err error) error {
 	return nil
 }
 
+// Unwrap is alias of function `Next`.
+// It is just for implements for stdlib errors.Unwrap from Go version 1.17.
+func Unwrap(err error) error {
+	return Next(err)
+}
+
 // HasStack checks and returns whether `err` implemented interface `iStack`.
 func HasStack(err error) bool {
 	_, ok := err.(iStack)
 	return ok
 }
+
+// Equal reports whether current error `err` equals to error `target`.
+// Please note that, in default comparison for `Error`,
+// the errors are considered the same if both the `code` and `text` of them are the same.
+func Equal(err, target error) bool {
+	if err == target {
+		return true
+	}
+	if e, ok := err.(iEqual); ok {
+		return e.Equal(target)
+	}
+	if e, ok := target.(iEqual); ok {
+		return e.Equal(err)
+	}
+	return false
+}
+
+// Is reports whether current error `err` has error `target` in its chaining errors.
+// It is just for implements for stdlib errors.Unwrap from Go version 1.17.
+func Is(err, target error) bool {
+	if e, ok := err.(iIs); ok {
+		return e.Is(target)
+	}
+	return false
+}
diff --git a/errors/gerror/gerror_error.go b/errors/gerror/gerror_error.go
index e3491b7bf..5a860d118 100644
--- a/errors/gerror/gerror_error.go
+++ b/errors/gerror/gerror_error.go
@@ -7,10 +7,8 @@
 package gerror
 
 import (
-	"bytes"
 	"errors"
 	"fmt"
-	"io"
 	"runtime"
 	"strings"
 
@@ -59,18 +57,6 @@ func (err *Error) Error() string {
 	return errStr
 }
 
-// Code returns the error code.
-// It returns CodeNil if it has no error code.
-func (err *Error) Code() gcode.Code {
-	if err == nil {
-		return gcode.CodeNil
-	}
-	if err.code == gcode.CodeNil {
-		return Code(err.Next())
-	}
-	return err.code
-}
-
 // Cause returns the root cause error.
 func (err *Error) Cause() error {
 	if err == nil {
@@ -97,64 +83,6 @@ func (err *Error) Cause() error {
 	return nil
 }
 
-// Format formats the frame according to the fmt.Formatter interface.
-//
-// %v, %s   : Print all the error string;
-// %-v, %-s : Print current level error string;
-// %+s      : Print full stack error list;
-// %+v      : Print the error string and full stack error list;
-func (err *Error) Format(s fmt.State, verb rune) {
-	switch verb {
-	case 's', 'v':
-		switch {
-		case s.Flag('-'):
-			if err.text != "" {
-				_, _ = io.WriteString(s, err.text)
-			} else {
-				_, _ = io.WriteString(s, err.Error())
-			}
-		case s.Flag('+'):
-			if verb == 's' {
-				_, _ = io.WriteString(s, err.Stack())
-			} else {
-				_, _ = io.WriteString(s, err.Error()+"\n"+err.Stack())
-			}
-		default:
-			_, _ = io.WriteString(s, err.Error())
-		}
-	}
-}
-
-// Stack returns the stack callers as string.
-// It returns an empty string if the `err` does not support stacks.
-func (err *Error) Stack() string {
-	if err == nil {
-		return ""
-	}
-	var (
-		loop   = err
-		index  = 1
-		buffer = bytes.NewBuffer(nil)
-	)
-	for loop != nil {
-		buffer.WriteString(fmt.Sprintf("%d. %-v\n", index, loop))
-		index++
-		formatSubStack(loop.stack, buffer)
-		if loop.error != nil {
-			if e, ok := loop.error.(*Error); ok {
-				loop = e
-			} else {
-				buffer.WriteString(fmt.Sprintf("%d. %s\n", index, loop.error.Error()))
-				index++
-				break
-			}
-		} else {
-			break
-		}
-	}
-	return buffer.String()
-}
-
 // Current creates and returns the current level error.
 // It returns nil if current level error is nil.
 func (err *Error) Current() error {
@@ -178,53 +106,46 @@ func (err *Error) Next() error {
 	return err.error
 }
 
-// SetCode updates the internal code with given code.
-func (err *Error) SetCode(code gcode.Code) {
-	if err == nil {
-		return
-	}
-	err.code = code
+// Unwrap is alias of function `Next`.
+// It is just for implements for stdlib errors.Unwrap from Go version 1.17.
+func (err *Error) Unwrap() error {
+	return err.Next()
 }
 
-// MarshalJSON implements the interface MarshalJSON for json.Marshal.
-// Note that do not use pointer as its receiver here.
-func (err Error) MarshalJSON() ([]byte, error) {
-	return []byte(`"` + err.Error() + `"`), nil
+// Equal reports whether current error `err` equals to error `target`.
+// Please note that, in default comparison for `Error`,
+// the errors are considered the same if both the `code` and `text` of them are the same.
+func (err *Error) Equal(target error) bool {
+	if err == target {
+		return true
+	}
+	// Code should be the same.
+	// Note that if both errors have `nil` code, they are also considered equal.
+	if err.code != Code(target) {
+		return false
+	}
+	// Text should be the same.
+	if err.text != fmt.Sprintf(`%-s`, target) {
+		return false
+	}
+	return true
 }
 
-// formatSubStack formats the stack for error.
-func formatSubStack(st stack, buffer *bytes.Buffer) {
-	if st == nil {
-		return
+// Is reports whether current error `err` has error `target` in its chaining errors.
+// It is just for implements for stdlib errors.Unwrap from Go version 1.17.
+func (err *Error) Is(target error) bool {
+	if Equal(err, target) {
+		return true
 	}
-	index := 1
-	space := "  "
-	for _, p := range st {
-		if fn := runtime.FuncForPC(p - 1); fn != nil {
-			file, line := fn.FileLine(p - 1)
-			// Custom filtering.
-			if strings.Contains(file, stackFilterKeyLocal) {
-				continue
-			}
-			// Avoid stack string like "`autogenerated`"
-			if strings.Contains(file, "<") {
-				continue
-			}
-			// Ignore GO ROOT paths.
-			if goRootForFilter != "" &&
-				len(file) >= len(goRootForFilter) &&
-				file[0:len(goRootForFilter)] == goRootForFilter {
-				continue
-			}
-			// Graceful indent.
-			if index > 9 {
-				space = " "
-			}
-			buffer.WriteString(fmt.Sprintf(
-				"   %d).%s%s\n    \t%s:%d\n",
-				index, space, fn.Name(), file, line,
-			))
-			index++
-		}
+	nextErr := err.Next()
+	if nextErr == nil {
+		return false
 	}
+	if Equal(nextErr, target) {
+		return true
+	}
+	if e, ok := nextErr.(iIs); ok {
+		return e.Is(target)
+	}
+	return false
 }
diff --git a/errors/gerror/gerror_error_code.go b/errors/gerror/gerror_error_code.go
new file mode 100644
index 000000000..880cc54ff
--- /dev/null
+++ b/errors/gerror/gerror_error_code.go
@@ -0,0 +1,31 @@
+// Copyright GoFrame Author(https://goframe.org). All Rights Reserved.
+//
+// This Source Code Form is subject to the terms of the MIT License.
+// If a copy of the MIT was not distributed with this file,
+// You can obtain one at https://github.com/gogf/gf.
+
+package gerror
+
+import (
+	"github.com/gogf/gf/v2/errors/gcode"
+)
+
+// Code returns the error code.
+// It returns CodeNil if it has no error code.
+func (err *Error) Code() gcode.Code {
+	if err == nil {
+		return gcode.CodeNil
+	}
+	if err.code == gcode.CodeNil {
+		return Code(err.Next())
+	}
+	return err.code
+}
+
+// SetCode updates the internal code with given code.
+func (err *Error) SetCode(code gcode.Code) {
+	if err == nil {
+		return
+	}
+	err.code = code
+}
diff --git a/errors/gerror/gerror_error_format.go b/errors/gerror/gerror_error_format.go
new file mode 100644
index 000000000..e020c374e
--- /dev/null
+++ b/errors/gerror/gerror_error_format.go
@@ -0,0 +1,80 @@
+// Copyright GoFrame Author(https://goframe.org). All Rights Reserved.
+//
+// This Source Code Form is subject to the terms of the MIT License.
+// If a copy of the MIT was not distributed with this file,
+// You can obtain one at https://github.com/gogf/gf.
+
+package gerror
+
+import (
+	"bytes"
+	"fmt"
+	"io"
+	"runtime"
+	"strings"
+)
+
+// Format formats the frame according to the fmt.Formatter interface.
+//
+// %v, %s   : Print all the error string;
+// %-v, %-s : Print current level error string;
+// %+s      : Print full stack error list;
+// %+v      : Print the error string and full stack error list;
+func (err *Error) Format(s fmt.State, verb rune) {
+	switch verb {
+	case 's', 'v':
+		switch {
+		case s.Flag('-'):
+			if err.text != "" {
+				_, _ = io.WriteString(s, err.text)
+			} else {
+				_, _ = io.WriteString(s, err.Error())
+			}
+		case s.Flag('+'):
+			if verb == 's' {
+				_, _ = io.WriteString(s, err.Stack())
+			} else {
+				_, _ = io.WriteString(s, err.Error()+"\n"+err.Stack())
+			}
+		default:
+			_, _ = io.WriteString(s, err.Error())
+		}
+	}
+}
+
+// formatSubStack formats the stack for error.
+func formatSubStack(st stack, buffer *bytes.Buffer) {
+	if st == nil {
+		return
+	}
+	index := 1
+	space := "  "
+	for _, p := range st {
+		if fn := runtime.FuncForPC(p - 1); fn != nil {
+			file, line := fn.FileLine(p - 1)
+			// Custom filtering.
+			if strings.Contains(file, stackFilterKeyLocal) {
+				continue
+			}
+			// Avoid stack string like "`autogenerated`"
+			if strings.Contains(file, "<") {
+				continue
+			}
+			// Ignore GO ROOT paths.
+			if goRootForFilter != "" &&
+				len(file) >= len(goRootForFilter) &&
+				file[0:len(goRootForFilter)] == goRootForFilter {
+				continue
+			}
+			// Graceful indent.
+			if index > 9 {
+				space = " "
+			}
+			buffer.WriteString(fmt.Sprintf(
+				"   %d).%s%s\n    \t%s:%d\n",
+				index, space, fn.Name(), file, line,
+			))
+			index++
+		}
+	}
+}
diff --git a/errors/gerror/gerror_error_json.go b/errors/gerror/gerror_error_json.go
new file mode 100644
index 000000000..5c290d7af
--- /dev/null
+++ b/errors/gerror/gerror_error_json.go
@@ -0,0 +1,13 @@
+// Copyright GoFrame Author(https://goframe.org). All Rights Reserved.
+//
+// This Source Code Form is subject to the terms of the MIT License.
+// If a copy of the MIT was not distributed with this file,
+// You can obtain one at https://github.com/gogf/gf.
+
+package gerror
+
+// MarshalJSON implements the interface MarshalJSON for json.Marshal.
+// Note that do not use pointer as its receiver here.
+func (err Error) MarshalJSON() ([]byte, error) {
+	return []byte(`"` + err.Error() + `"`), nil
+}
diff --git a/errors/gerror/gerror_error_stack.go b/errors/gerror/gerror_error_stack.go
new file mode 100644
index 000000000..72769ca23
--- /dev/null
+++ b/errors/gerror/gerror_error_stack.go
@@ -0,0 +1,42 @@
+// Copyright GoFrame Author(https://goframe.org). All Rights Reserved.
+//
+// This Source Code Form is subject to the terms of the MIT License.
+// If a copy of the MIT was not distributed with this file,
+// You can obtain one at https://github.com/gogf/gf.
+
+package gerror
+
+import (
+	"bytes"
+	"fmt"
+)
+
+// Stack returns the stack callers as string.
+// It returns an empty string if the `err` does not support stacks.
+func (err *Error) Stack() string {
+	if err == nil {
+		return ""
+	}
+	var (
+		loop   = err
+		index  = 1
+		buffer = bytes.NewBuffer(nil)
+	)
+	for loop != nil {
+		buffer.WriteString(fmt.Sprintf("%d. %-v\n", index, loop))
+		index++
+		formatSubStack(loop.stack, buffer)
+		if loop.error != nil {
+			if e, ok := loop.error.(*Error); ok {
+				loop = e
+			} else {
+				buffer.WriteString(fmt.Sprintf("%d. %s\n", index, loop.error.Error()))
+				index++
+				break
+			}
+		} else {
+			break
+		}
+	}
+	return buffer.String()
+}
diff --git a/errors/gerror/gerror_interface.go b/errors/gerror/gerror_interface.go
new file mode 100644
index 000000000..317f951dc
--- /dev/null
+++ b/errors/gerror/gerror_interface.go
@@ -0,0 +1,51 @@
+// Copyright GoFrame Author(https://goframe.org). All Rights Reserved.
+//
+// This Source Code Form is subject to the terms of the MIT License.
+// If a copy of the MIT was not distributed with this file,
+// You can obtain one at https://github.com/gogf/gf.
+
+package gerror
+
+import (
+	"github.com/gogf/gf/v2/errors/gcode"
+)
+
+// iIs is the interface for Is feature.
+type iIs interface {
+	Is(target error) bool
+}
+
+// iEqual is the interface for Equal feature.
+type iEqual interface {
+	Equal(target error) bool
+}
+
+// iCode is the interface for Code feature.
+type iCode interface {
+	Error() string
+	Code() gcode.Code
+}
+
+// iStack is the interface for Stack feature.
+type iStack interface {
+	Error() string
+	Stack() string
+}
+
+// iCause is the interface for Cause feature.
+type iCause interface {
+	Error() string
+	Cause() error
+}
+
+// iCurrent is the interface for Current feature.
+type iCurrent interface {
+	Error() string
+	Current() error
+}
+
+// iNext is the interface for Next feature.
+type iNext interface {
+	Error() string
+	Next() error
+}
diff --git a/errors/gerror/gerror_option.go b/errors/gerror/gerror_option.go
index c2ff71152..33ed881f7 100644
--- a/errors/gerror/gerror_option.go
+++ b/errors/gerror/gerror_option.go
@@ -16,7 +16,7 @@ type Option struct {
 	Code  gcode.Code // Error code if necessary.
 }
 
-// NewOption creates and returns an error with Option.
+// NewOption creates and returns a custom error with Option.
 // It is the senior usage for creating error, which is often used internally in framework.
 func NewOption(option Option) error {
 	err := &Error{
diff --git a/errors/gerror/gerror_z_unit_test.go b/errors/gerror/gerror_z_unit_test.go
index 228cb91df..c8c0ad719 100644
--- a/errors/gerror/gerror_z_unit_test.go
+++ b/errors/gerror/gerror_z_unit_test.go
@@ -255,6 +255,24 @@ func Test_Next(t *testing.T) {
 	})
 }
 
+func Test_Unwrap(t *testing.T) {
+	gtest.C(t, func(t *gtest.T) {
+		err := errors.New("1")
+		err = gerror.Wrap(err, "2")
+		err = gerror.Wrap(err, "3")
+		t.Assert(err.Error(), "3: 2: 1")
+
+		err = gerror.Unwrap(err)
+		t.Assert(err.Error(), "2: 1")
+
+		err = gerror.Unwrap(err)
+		t.Assert(err.Error(), "1")
+
+		err = gerror.Unwrap(err)
+		t.AssertNil(err)
+	})
+}
+
 func Test_Code(t *testing.T) {
 	gtest.C(t, func(t *gtest.T) {
 		err := errors.New("123")
@@ -340,3 +358,26 @@ func Test_HasStack(t *testing.T) {
 		t.Assert(gerror.HasStack(err2), true)
 	})
 }
+
+func Test_Equal(t *testing.T) {
+	gtest.C(t, func(t *gtest.T) {
+		err1 := errors.New("1")
+		err2 := errors.New("1")
+		err3 := gerror.New("1")
+		err4 := gerror.New("4")
+		t.Assert(gerror.Equal(err1, err2), false)
+		t.Assert(gerror.Equal(err1, err3), true)
+		t.Assert(gerror.Equal(err2, err3), true)
+		t.Assert(gerror.Equal(err3, err4), false)
+		t.Assert(gerror.Equal(err1, err4), false)
+	})
+}
+
+func Test_Is(t *testing.T) {
+	gtest.C(t, func(t *gtest.T) {
+		err1 := errors.New("1")
+		err2 := gerror.Wrap(err1, "2")
+		err2 = gerror.Wrap(err2, "3")
+		t.Assert(gerror.Is(err2, err1), true)
+	})
+}
diff --git a/net/ghttp/ghttp_request_param.go b/net/ghttp/ghttp_request_param.go
index a7b33f9cc..1f68a9259 100644
--- a/net/ghttp/ghttp_request_param.go
+++ b/net/ghttp/ghttp_request_param.go
@@ -152,9 +152,10 @@ func (r *Request) Get(key string, def ...interface{}) *gvar.Var {
 func (r *Request) GetBody() []byte {
 	if r.bodyContent == nil {
 		var err error
-		r.bodyContent, err = ioutil.ReadAll(r.Body)
-		if err != nil {
-			panic(gerror.WrapCode(gcode.CodeInternalError, err, `ReadAll from body failed`))
+		if r.bodyContent, err = ioutil.ReadAll(r.Body); err != nil {
+			errMsg := `Read from request Body failed`
+			errMsg += `, the Body might be closed or read manually from middleware/hook/other package previously`
+			panic(gerror.WrapCode(gcode.CodeInternalError, err, errMsg))
 		}
 		r.Body = utils.NewReadCloser(r.bodyContent, true)
 	}