diff --git a/gcollection/gstack/stack.go b/gcollection/gstack/stack.go
new file mode 100644
index 0000000..d2ef695
--- /dev/null
+++ b/gcollection/gstack/stack.go
@@ -0,0 +1,80 @@
+// Package gstack
+// Author: hyphen
+// Copyright 2024 hyphen. All rights reserved.
+// Create-time: 2024/1/3
+package gstack
+
+import (
+	"github.com/hyphennn/glamda/internal"
+)
+
+type node[T any] struct {
+	val  T
+	next *node[T]
+}
+
+type Stack[T any] struct {
+	top  *node[T]
+	size int
+}
+
+func NewStack[T any]() *Stack[T] {
+	return &Stack[T]{nil, 0}
+}
+
+func (s *Stack[T]) Size() int {
+	return s.size
+}
+
+func (s *Stack[T]) Push(t T) {
+	s.top = &node[T]{t, s.top}
+	s.size++
+}
+
+func (s *Stack[T]) PushN(ts ...T) {
+	for _, t := range ts {
+		s.Push(t)
+	}
+}
+
+func (s *Stack[T]) Pop() (T, bool) {
+	if s.top == nil {
+		return internal.Zero[T](), false
+	}
+	ot := s.top
+	s.top = s.top.next
+	s.size--
+	return ot.val, true
+}
+
+func (s *Stack[T]) PopN(n int) []T {
+	ret := []T{}
+	for i := 0; i < n; i++ {
+		v, ok := s.Pop()
+		if !ok {
+			break
+		}
+		ret = append(ret, v)
+	}
+	return ret
+}
+
+func (s *Stack[T]) Peek() (T, bool) {
+	if s.top == nil {
+		return internal.Zero[T](), false
+	}
+	return s.top.val, true
+}
+
+func (s *Stack[T]) PeekN(n int) []T {
+	ptr := s.top
+	ret := []T{}
+	for i := 0; i < n; i++ {
+		if ptr == nil {
+			break
+		}
+		ret = append(ret, ptr.val)
+		ptr = ptr.next
+	}
+	return ret
+}
diff --git a/gcollection/gstack/stack_test.go b/gcollection/gstack/stack_test.go
new file mode 100644
index 0000000..db9840e
--- /dev/null
+++ b/gcollection/gstack/stack_test.go
@@ -0,0 +1,39 @@
+// Package gstack
+// Author: hyphen
+// Copyright 2024 hyphen. All rights reserved.
+// Create-time: 2024/1/3
+package gstack
+
+import (
+	"testing"
+
+	"github.com/hyphennn/glamda/internal/assert"
+)
+
+func TestStack(t *testing.T) {
+	stk := NewStack[int]()
+	stk.PushN([]int{1, 1, 4, 5, 1, 4}...)
+	stk.Push(1)
+	v, ok := stk.Peek()
+	vs := stk.PeekN(5)
+	assert.Equal(t, v, 1)
+	assert.True(t, ok)
+	assert.Equal(t, stk.Size(), 7)
+	assert.Equal(t, vs, []int{1, 4, 1, 5, 4})
+	v, ok = stk.Pop()
+	assert.Equal(t, v, 1)
+	assert.True(t, ok)
+	assert.Equal(t, stk.Size(), 6)
+	vs = stk.PopN(5)
+	assert.Equal(t, vs, []int{4, 1, 5, 4, 1})
+	assert.Equal(t, stk.Size(), 1)
+	assert.Equal(t, stk.PeekN(3), []int{1})
+	v, ok = stk.Pop()
+	v, ok = stk.Pop()
+	assert.Equal(t, v, 0)
+	assert.False(t, ok)
+	stk.Push(1)
+	v, ok = stk.Pop()
+	assert.Equal(t, v, 1)
+	assert.True(t, ok)
+}
diff --git a/gutils/gutils.go b/gutils/gutils.go
new file mode 100644
index 0000000..b227af0
--- /dev/null
+++ b/gutils/gutils.go
@@ -0,0 +1,153 @@
+// Package gutils
+// Author: hyphen
+// Copyright 2023 hyphen. All rights reserved.
+// Create-time: 2023/12/4
+package gutils
+
+import (
+	"bytes"
+	"context"
+	"encoding/json"
+	"fmt"
+	"io/ioutil"
+	"net/http"
+	"sync"
+
+	"github.com/hyphennn/glamda/internal"
+)
+
+func TernaryForm[T any](cond bool, tureVal, falseVal T) T {
+	if cond {
+		return tureVal
+	}
+	return falseVal
+}
+
+type Pair[F, S any] struct {
+	First  F
+	Second S
+}
+
+func MakePair[F, S any](f F, s S) *Pair[F, S] {
+	return &Pair[F, S]{First: f, Second: s}
+}
+
+func (p *Pair[F, S]) Split() (F, S) {
+	return p.First, p.Second
+}
+
+func FastAssert[T any](v any) T {
+	t, ok := v.(T)
+	if !ok {
+		return internal.Zero[T]()
+	}
+	return t
+}
+
+func MustDo[K, V any](key K, fc func(K) (V, error)) V {
+	return MustEasyDo(func() (V, error) {
+		return fc(key)
+	})
+}
+
+func MustDoCtx[K, V any](ctx context.Context, key K, fc func(context.Context, K) (V, error)) V {
+	return MustEasyDo(func() (V, error) {
+		return fc(ctx, key)
+	})
+}
+
+func MustEasyDo[V any](fc func() (V, error)) V {
+	v, err := fc()
+	if err != nil {
+		return internal.Zero[V]()
+	}
+	return v
+}
+
+type ch[T any] chan T
+
+type SafeChan[T any] struct {
+	ch[T]
+	once sync.Once
+}
+
+func NewSafeChan[T any](size ...int) *SafeChan[T] {
+	if len(size) == 0 {
+		return &SafeChan[T]{make(chan T), sync.Once{}}
+	}
+	return &SafeChan[T]{make(chan T, size[0]), sync.Once{}}
+}
+
+func (s *SafeChan[T]) Listen() (t T) {
+	t = <-s.ch
+	return
+}
+
+func (s *SafeChan[T]) Send(t T) {
+	s.ch <- t
+}
+
+func (s *SafeChan[T]) Close() {
+	s.once.Do(func() {
+		close(s.ch)
+	})
+}
+
+func Paging[T any](arr []T, offset, limit int) []T {
+	return arr[TernaryForm((offset)*limit <= len(arr), (offset)*limit, len(arr)):TernaryForm((offset+1)*limit <= len(arr), (offset+1)*limit, len(arr))]
+}
+
+var client = &http.Client{}
+
+func AccessResp(ctx context.Context, url string, method string, header map[string]string, param map[string]string,
+	body any, setAuthorization func(*http.Request)) (*http.Response, error) {
+	return access(ctx, url, method, header, param, body, setAuthorization)
+}
+
+func Access[T any](ctx context.Context, url string, method string, header map[string]string, param map[string]string,
+	body any, setAuthorization func(*http.Request), isSuccess func(response *http.Response) bool) (T, error) {
+	var ret T
+	resp, err := access(ctx, url, method, header, param, body, setAuthorization)
+	if err != nil {
+		return ret, fmt.Errorf("access %s failed: %w", url, err)
+	}
+	defer resp.Body.Close()
+	respBody, err := ioutil.ReadAll(resp.Body)
+	if err != nil {
+		return ret, fmt.Errorf("read resp body failed: %w", err)
+	}
+	if isSuccess != nil && !isSuccess(resp) {
+		return ret, fmt.Errorf("is success return false: %s", string(respBody))
+	}
+	err = json.Unmarshal(respBody, &ret)
+	if err != nil {
+		return ret, fmt.Errorf("unmarshal resp body failed: %w", err)
+	}
+	return ret, nil
+}
+
+func access(ctx context.Context, url string, method string, header map[string]string, param map[string]string,
+	body any, setAuthorization func(*http.Request)) (*http.Response, error) {
+	bodyJSON, err := json.Marshal(body)
+	if err != nil {
+		return nil, err
+	}
+	bodyReader := bytes.NewReader(bodyJSON)
+	req, err := http.NewRequestWithContext(ctx, method, url, bodyReader)
+	if setAuthorization != nil {
+		setAuthorization(req)
+	}
+	q := req.URL.Query()
+	for k, v := range param {
+		q.Add(k, v)
+	}
+	req.URL.RawQuery = q.Encode()
+	for k, v := range header {
+		req.Header.Add(k, v)
+	}
+	resp, err := client.Do(req)
+	if err != nil {
+		return nil, fmt.Errorf("access %s failed: %w", url, err)
+	}
+	return resp, nil
+}
diff --git a/gutils/lutils.go b/gutils/lutils.go
deleted file mode 100644
index 3163be1..0000000
--- a/gutils/lutils.go
+++ /dev/null
@@ -1,93 +0,0 @@
-// Package gutils
-// Author: hyphen
-// Copyright 2023 hyphen. All rights reserved.
-// Create-time: 2023/12/4
-package gutils
-
-import (
-	"context"
-	"sync"
-
-	"github.com/hyphennn/glamda/internal"
-)
-
-func TernaryForm[T any](cond bool, tureVal, falseVal T) T {
-	if cond {
-		return tureVal
-	}
-	return falseVal
-}
-
-type Pair[F, S any] struct {
-	First  F
-	Second S
-}
-
-func MakePair[F, S any](f F, s S) *Pair[F, S] {
-	return &Pair[F, S]{First: f, Second: s}
-}
-
-func (p *Pair[F, S]) Split() (F, S) {
-	return p.First, p.Second
-}
-
-func FastAssert[T any](v any) T {
-	t, ok := v.(T)
-	if !ok {
-		return internal.Zero[T]()
-	}
-	return t
-}
-
-func MustDo[K, V any](key K, fc func(K) (V, error)) V {
-	return MustEasyDo(func() (V, error) {
-		return fc(key)
-	})
-}
-
-func MustDoCtx[K, V any](ctx context.Context, key K, fc func(context.Context, K) (V, error)) V {
-	return MustEasyDo(func() (V, error) {
-		return fc(ctx, key)
-	})
-}
-
-func MustEasyDo[V any](fc func() (V, error)) V {
-	v, err := fc()
-	if err != nil {
-		return internal.Zero[V]()
-	}
-	return v
-}
-
-type ch[T any] chan T
-
-type SafeChan[T any] struct {
-	ch[T]
-	once sync.Once
-}
-
-func NewSafeChan[T any](size ...int) *SafeChan[T] {
-	if len(size) == 0 {
-		return &SafeChan[T]{make(chan T), sync.Once{}}
-	}
-	return &SafeChan[T]{make(chan T, size[0]), sync.Once{}}
-}
-
-func (s *SafeChan[T]) Listen() (t T) {
-	t = <-s.ch
-	return
-}
-
-func (s *SafeChan[T]) Send(t T) {
-	s.ch <- t
-}
-
-func (s *SafeChan[T]) Close() {
-	s.once.Do(func() {
-		close(s.ch)
-	})
-}
-
-func Paging[T any](arr []T, offset, limit int) []T {
-	return arr[TernaryForm((offset)*limit <= len(arr), (offset)*limit, len(arr)):TernaryForm((offset+1)*limit <= len(arr), (offset+1)*limit, len(arr))]
-}
diff --git a/gvalue/lvalue.go b/gvalue/gvalue.go
similarity index 100%
rename from gvalue/lvalue.go
rename to gvalue/gvalue.go