diff --git a/binary/jce/structs.go b/binary/jce/structs.go
index 8469c6d8..15d8cda8 100644
--- a/binary/jce/structs.go
+++ b/binary/jce/structs.go
@@ -1,7 +1,7 @@
 package jce
 
 type IJceStruct interface {
-	//ToBytes() []byte
+	// ToBytes() []byte
 	ReadFrom(*JceReader)
 }
 
@@ -42,8 +42,8 @@ type (
 		BigDataChannel        *BigDataChannel         `jceId:"5"`
 		VipEmotionList        []FileStorageServerInfo `jceId:"6"`
 		C2CPicDownList        []FileStorageServerInfo `jceId:"7"`
-		//FmtIPInfo             *FmtIPInfo `jceId:"8"`
-		//DomainIPChannel       *DomainIPChannel `jceId:"9"`
+		// FmtIPInfo             *FmtIPInfo `jceId:"8"`
+		// DomainIPChannel       *DomainIPChannel `jceId:"9"`
 		PttList []byte `jceId:"10"`
 	}
 
@@ -496,8 +496,8 @@ type (
 		IsFriend           byte  `jceId:"3"`
 		GroupCode          int64 `jceId:"4"`
 		GroupUin           int64 `jceId:"5"`
-		//Seed               []byte`jceId:"6"`
-		//SearchName         string`jceId:"7"`
+		// Seed               []byte`jceId:"6"`
+		// SearchName         string`jceId:"7"`
 		GetControl       int64    `jceId:"8"`
 		AddFriendSource  int32    `jceId:"9"`
 		SecureSig        []byte   `jceId:"10"`
diff --git a/binary/jce/writer.go b/binary/jce/writer.go
index be8f2764..a9464e8a 100644
--- a/binary/jce/writer.go
+++ b/binary/jce/writer.go
@@ -243,7 +243,7 @@ func (w *JceWriter) WriteJceStructRaw(s IJceStruct) {
 		decoderCache.Store(ty2, jceDec) // 存入缓存
 	}
 	for _, dec := range jceDec {
-		var obj = dec.ty.UnsafeIndirect(unsafe.Pointer(uintptr(reflect2.PtrOf(s)) + dec.offset)) // MAGIC!
+		obj := dec.ty.UnsafeIndirect(unsafe.Pointer(uintptr(reflect2.PtrOf(s)) + dec.offset)) // MAGIC!
 		if obj != nil {
 			w.WriteObject(obj, dec.id)
 		}
diff --git a/binary/pool.go b/binary/pool.go
new file mode 100644
index 00000000..895a3cd8
--- /dev/null
+++ b/binary/pool.go
@@ -0,0 +1,97 @@
+package binary
+
+import (
+	"bytes"
+	"compress/gzip"
+	"compress/zlib"
+	"sync"
+)
+
+var bufferPool = sync.Pool{
+	New: func() interface{} {
+		return new(Writer)
+	},
+}
+
+// NewWriter 从池中取出一个 Writer
+func NewWriter() *Writer {
+	w := bufferPool.Get().(*Writer)
+	if w == nil {
+		return new(Writer)
+	}
+	return w
+}
+
+// PutBuffer 将 Writer 放回池中
+func PutBuffer(w *Writer) {
+	// See https://golang.org/issue/23199
+	const maxSize = 1 << 16
+	if w.Cap() < maxSize { // 对于大Buffer直接丢弃
+		w.Reset()
+		bufferPool.Put(w)
+	}
+}
+
+type gzipWriter struct {
+	w   *gzip.Writer
+	buf *bytes.Buffer
+}
+
+var gzipPool = sync.Pool{
+	New: func() interface{} {
+		buf := new(bytes.Buffer)
+		w := gzip.NewWriter(buf)
+		return &gzipWriter{
+			w:   w,
+			buf: buf,
+		}
+	},
+}
+
+func acquireGzipWriter() *gzipWriter {
+	ret := gzipPool.Get().(*gzipWriter)
+	ret.buf.Reset()
+	ret.w.Reset(ret.buf)
+	return ret
+}
+
+func releaseGzipWriter(w *gzipWriter) {
+	// See https://golang.org/issue/23199
+	const maxSize = 1 << 16
+	if w.buf.Cap() < maxSize {
+		w.buf.Reset()
+		gzipPool.Put(w)
+	}
+}
+
+type zlibWriter struct {
+	w   *zlib.Writer
+	buf *bytes.Buffer
+}
+
+var zlibPool = sync.Pool{
+	New: func() interface{} {
+		buf := new(bytes.Buffer)
+		w := zlib.NewWriter(buf)
+		return &zlibWriter{
+			w:   w,
+			buf: buf,
+		}
+	},
+}
+
+func acquireZlibWriter() *zlibWriter {
+	ret := zlibPool.Get().(*zlibWriter)
+	ret.buf.Reset()
+	ret.w.Reset(ret.buf)
+	return ret
+}
+
+func releaseZlibWriter(w *zlibWriter) {
+	// See https://golang.org/issue/23199
+	const maxSize = 1 << 16
+	if w.buf.Cap() < maxSize {
+		w.buf.Reset()
+		zlibPool.Put(w)
+	}
+}
diff --git a/binary/tea.go b/binary/tea.go
index 34c22863..ed64e374 100644
--- a/binary/tea.go
+++ b/binary/tea.go
@@ -13,12 +13,9 @@ func xorQ(a, b []byte, c []byte) { // MAGIC
 			*(*uint64)(unsafe.Pointer((*reflect.SliceHeader)(unsafe.Pointer(&b)).Data))
 }
 
-func isZero(a []byte) bool { // MAGIC
-	return *(*uint64)(unsafe.Pointer((*reflect.SliceHeader)(unsafe.Pointer(&a)).Data)) == 0
-}
-
 type TEA [4]uint32
 
+// Encrypt tea 加密
 // http://bbs.chinaunix.net/thread-583468-1-1.html
 // 感谢xichen大佬对TEA的解释
 func (t *TEA) Encrypt(src []byte) (dst []byte) {
@@ -27,9 +24,9 @@ func (t *TEA) Encrypt(src []byte) (dst []byte) {
 	tmp1 := make([]byte, 8) // 非纯src的数据
 	tmp2 := make([]byte, 8)
 	dst = make([]byte, fill+lens+7)
-	//for i := 0; i < fill; i++ {
-	//	dst[i] = ' '
-	//} // For test purpose
+	// for i := 0; i < fill; i++ {
+	//	 dst[i] = ' '
+	// } // For test purpose
 	_, _ = rand.Read(dst[0:fill])
 	dst[0] = byte(fill-3) | 0xF8 // 存储pad长度
 	in := 0                      // 位置
@@ -86,9 +83,6 @@ func (t *TEA) Decrypt(data []byte) []byte {
 		xorQ(dst[in:in+8], data[in-8:in], dst[in:in+8])
 		xorQ(dst[in:in+8], data[in-8:in], tmp)
 	}
-	//if !isZero(dst[len(data)-7:]) {
-	//	return nil
-	//}
 	return dst[dst[0]&7+3 : len(data)-7]
 }
 
diff --git a/binary/tea_test.go b/binary/tea_test.go
index ca14946e..08831c11 100644
--- a/binary/tea_test.go
+++ b/binary/tea_test.go
@@ -27,7 +27,7 @@ var sampleData = func() [][3]string {
 
 		{"LXY1226    Mrs4s", "LXY Testing~", "ab20caa63f3a6503a84f3cb28f9e26b6c18c051e995d1721"},
 	}
-	for i, _ := range out {
+	for i := range out {
 		c, _ := hex.DecodeString(out[i][ENC])
 		out[i][ENC] = utils.B2S(c)
 	}
diff --git a/binary/utils.go b/binary/utils.go
index 35f77642..29cc14ef 100644
--- a/binary/utils.go
+++ b/binary/utils.go
@@ -8,43 +8,10 @@ import (
 	"encoding/hex"
 	"io"
 	"net"
-	"sync"
 
 	"github.com/Mrs4s/MiraiGo/utils"
 )
 
-type gzipWriter struct {
-	w   *gzip.Writer
-	buf *bytes.Buffer
-}
-
-var gzipPool = sync.Pool{
-	New: func() interface{} {
-		buf := new(bytes.Buffer)
-		w := gzip.NewWriter(buf)
-		return &gzipWriter{
-			w:   w,
-			buf: buf,
-		}
-	},
-}
-
-func acquireGzipWriter() *gzipWriter {
-	ret := gzipPool.Get().(*gzipWriter)
-	ret.buf.Reset()
-	ret.w.Reset(ret.buf)
-	return ret
-}
-
-func releaseGzipWriter(w *gzipWriter) {
-	// See https://golang.org/issue/23199
-	const maxSize = 1 << 15
-	if w.buf.Cap() < maxSize {
-		w.buf.Reset()
-		gzipPool.Put(w)
-	}
-}
-
 func ZlibUncompress(src []byte) []byte {
 	b := bytes.NewReader(src)
 	var out bytes.Buffer
@@ -55,11 +22,12 @@ func ZlibUncompress(src []byte) []byte {
 }
 
 func ZlibCompress(data []byte) []byte {
-	buf := new(bytes.Buffer)
-	w := zlib.NewWriter(buf)
-	_, _ = w.Write(data)
-	w.Close()
-	return buf.Bytes()
+	zw := acquireZlibWriter()
+	_, _ = zw.w.Write(data)
+	_ = zw.w.Close()
+	ret := append([]byte(nil), zw.buf.Bytes()...)
+	releaseZlibWriter(zw)
+	return ret
 }
 
 func GZipCompress(data []byte) []byte {
@@ -87,7 +55,6 @@ func CalculateImageResourceId(md5 []byte) string {
 	id = id[:37]
 	id = append(id, "}.png"...)
 	return utils.B2S(bytes.ToUpper(id))
-
 }
 
 func GenUUID(uuid []byte) []byte {
diff --git a/binary/writer.go b/binary/writer.go
index 43dca05d..acb54b58 100644
--- a/binary/writer.go
+++ b/binary/writer.go
@@ -1,33 +1,13 @@
 package binary
 
 import (
+	"bytes"
 	"encoding/binary"
 	"encoding/hex"
-	"sync"
 )
 
-type Writer struct {
-	b []byte
-}
-
-var bufferPool = sync.Pool{
-	New: func() interface{} {
-		return new(Writer)
-	},
-}
-
-func NewWriter() *Writer {
-	return bufferPool.Get().(*Writer)
-}
-
-func PutBuffer(w *Writer) {
-	// See https://golang.org/issue/23199
-	const maxSize = 1 << 16
-	if cap(w.b) < maxSize { // 对于大Buffer直接丢弃
-		w.b = w.b[:0]
-		bufferPool.Put(w)
-	}
-}
+// Writer 写入
+type Writer bytes.Buffer
 
 func NewWriterF(f func(writer *Writer)) []byte {
 	w := NewWriter()
@@ -38,7 +18,7 @@ func NewWriterF(f func(writer *Writer)) []byte {
 }
 
 func (w *Writer) Write(b []byte) {
-	w.b = append(w.b, b...)
+	(*bytes.Buffer)(w).Write(b)
 }
 
 func (w *Writer) WriteHex(h string) {
@@ -47,7 +27,7 @@ func (w *Writer) WriteHex(h string) {
 }
 
 func (w *Writer) WriteByte(b byte) {
-	w.b = append(w.b, b)
+	(*bytes.Buffer)(w).WriteByte(b)
 }
 
 func (w *Writer) WriteUInt16(v uint16) {
@@ -129,5 +109,17 @@ func (w *Writer) WriteTlvLimitedSize(data []byte, limit int) {
 }
 
 func (w *Writer) Bytes() []byte {
-	return w.b
+	return (*bytes.Buffer)(w).Bytes()
+}
+
+func (w *Writer) Cap() int {
+	return (*bytes.Buffer)(w).Cap()
+}
+
+func (w *Writer) Reset() {
+	(*bytes.Buffer)(w).Reset()
+}
+
+func (w *Writer) Grow(n int) {
+	(*bytes.Buffer)(w).Grow(n)
 }
diff --git a/client/builders.go b/client/builders.go
index 07862207..c8e9dcf5 100644
--- a/client/builders.go
+++ b/client/builders.go
@@ -393,7 +393,7 @@ func (c *QQClient) buildRequestChangeSigPacket() (uint16, []byte) {
 			"qzone.qq.com", "vip.qq.com", "qun.qq.com", "game.qq.com", "qqweb.qq.com",
 			"office.qq.com", "ti.qq.com", "mail.qq.com", "qzone.com", "mma.qq.com",
 		}))
-		//w.Write(tlv.T202(SystemDeviceInfo.WifiBSSID, SystemDeviceInfo.WifiSSID))
+		// w.Write(tlv.T202(SystemDeviceInfo.WifiBSSID, SystemDeviceInfo.WifiSSID))
 	})
 	sso := packets.BuildSsoPacket(seq, c.version.AppId, "wtlogin.exchange_emp", SystemDeviceInfo.IMEI, c.sigInfo.tgt, c.OutGoingPacketSessionId, req, c.ksid)
 	packet := packets.BuildLoginPacket(c.Uin, 2, make([]byte, 16), sso, []byte{})
diff --git a/client/client.go b/client/client.go
index 79f16355..721adbe3 100644
--- a/client/client.go
+++ b/client/client.go
@@ -15,6 +15,9 @@ import (
 	"sync/atomic"
 	"time"
 
+	jsoniter "github.com/json-iterator/go"
+	"github.com/pkg/errors"
+
 	"github.com/Mrs4s/MiraiGo/binary"
 	"github.com/Mrs4s/MiraiGo/binary/jce"
 	"github.com/Mrs4s/MiraiGo/client/pb/msg"
@@ -22,8 +25,6 @@ import (
 	"github.com/Mrs4s/MiraiGo/protocol/crypto"
 	"github.com/Mrs4s/MiraiGo/protocol/packets"
 	"github.com/Mrs4s/MiraiGo/utils"
-	jsoniter "github.com/json-iterator/go"
-	"github.com/pkg/errors"
 )
 
 var json = jsoniter.ConfigFastest
@@ -536,7 +537,7 @@ func (c *QQClient) ReloadFriendList() error {
 
 // GetFriendList request friend list
 func (c *QQClient) GetFriendList() (*FriendListResponse, error) {
-	var curFriendCount = 0
+	curFriendCount := 0
 	r := &FriendListResponse{}
 	for {
 		rsp, err := c.sendAndWait(c.buildFriendGroupListRequestPacket(int16(curFriendCount), 150, 0, 0))
diff --git a/client/decoders.go b/client/decoders.go
index 49893b56..db2ee516 100644
--- a/client/decoders.go
+++ b/client/decoders.go
@@ -447,7 +447,7 @@ func decodeFriendGroupListResponse(_ *QQClient, _ *incomingPacketInfo, payload [
 	totalFriendCount := r.ReadInt16(5)
 	friends := []jce.FriendInfo{}
 	r.ReadSlice(&friends, 7)
-	var l = make([]*FriendInfo, 0, len(friends))
+	l := make([]*FriendInfo, 0, len(friends))
 	for _, f := range friends {
 		l = append(l, &FriendInfo{
 			Uin:      f.FriendUin,
@@ -474,7 +474,7 @@ func decodeGroupListResponse(c *QQClient, _ *incomingPacketInfo, payload []byte)
 	groups := []jce.TroopNumber{}
 	r.ReadSlice(&vecCookie, 4)
 	r.ReadSlice(&groups, 5)
-	var l = make([]*GroupInfo, 0, len(groups))
+	l := make([]*GroupInfo, 0, len(groups))
 	for _, g := range groups {
 		l = append(l, &GroupInfo{
 			Uin:            g.GroupUin,
@@ -507,7 +507,7 @@ func decodeGroupMemberListResponse(_ *QQClient, _ *incomingPacketInfo, payload [
 	members := []jce.TroopMemberInfo{}
 	r.ReadSlice(&members, 3)
 	next := r.ReadInt64(4)
-	var l = make([]*GroupMemberInfo, 0, len(members))
+	l := make([]*GroupMemberInfo, 0, len(members))
 	for _, m := range members {
 		l = append(l, &GroupMemberInfo{
 			Uin:                    m.MemberUin,
@@ -677,7 +677,7 @@ func decodeOnlinePushTransPacket(c *QQClient, _ *incomingPacketInfo, payload []b
 	if info.GetMsgType() == 44 {
 		data.ReadBytes(5)
 		var4 := int32(data.ReadByte())
-		var var5 = int64(0)
+		var5 := int64(0)
 		target := int64(uint32(data.ReadInt32()))
 		if var4 != 0 && var4 != 1 {
 			var5 = int64(uint32(data.ReadInt32()))
diff --git a/client/face.go b/client/face.go
index 9b3cdd39..9de3d1c2 100644
--- a/client/face.go
+++ b/client/face.go
@@ -3,10 +3,11 @@ package client
 import (
 	"fmt"
 
-	"github.com/Mrs4s/MiraiGo/client/pb/faceroam"
-	"github.com/Mrs4s/MiraiGo/protocol/packets"
 	"github.com/golang/protobuf/proto"
 	"github.com/pkg/errors"
+
+	"github.com/Mrs4s/MiraiGo/client/pb/faceroam"
+	"github.com/Mrs4s/MiraiGo/protocol/packets"
 )
 
 type CustomFace struct {
diff --git a/client/global.go b/client/global.go
index c7313f8f..846c738b 100644
--- a/client/global.go
+++ b/client/global.go
@@ -156,8 +156,10 @@ var SystemDeviceInfo = &DeviceInfo{
 	},
 }
 
-var EmptyBytes = []byte{}
-var NumberRange = "0123456789"
+var (
+	EmptyBytes  = []byte{}
+	NumberRange = "0123456789"
+)
 
 func init() {
 	r := make([]byte, 16)
@@ -404,7 +406,7 @@ func GenIMEI() string {
 		sum += toAdd
 		final.WriteString(fmt.Sprintf("%d", toAdd)) // and even printing them here!
 	}
-	var ctrlDigit = (sum * 9) % 10 // calculating the control digit
+	ctrlDigit := (sum * 9) % 10 // calculating the control digit
 	final.WriteString(fmt.Sprintf("%d", ctrlDigit))
 	return final.String()
 }
@@ -443,7 +445,7 @@ func getSSOAddress() ([]*net.TCPAddr, error) {
 	reader := jce.NewJceReader(data.Map["HttpServerListRes"][1:])
 	servers := []jce.SsoServerInfo{}
 	reader.ReadSlice(&servers, 2)
-	var adds = make([]*net.TCPAddr, 0, len(servers))
+	adds := make([]*net.TCPAddr, 0, len(servers))
 	for _, s := range servers {
 		if strings.Contains(s.Server, "com") {
 			continue
diff --git a/client/group_file.go b/client/group_file.go
index 610e7449..5f48407f 100644
--- a/client/group_file.go
+++ b/client/group_file.go
@@ -12,11 +12,12 @@ import (
 
 	"google.golang.org/protobuf/proto"
 
+	"github.com/pkg/errors"
+
 	"github.com/Mrs4s/MiraiGo/client/pb/exciting"
 	"github.com/Mrs4s/MiraiGo/client/pb/oidb"
 	"github.com/Mrs4s/MiraiGo/protocol/packets"
 	"github.com/Mrs4s/MiraiGo/utils"
-	"github.com/pkg/errors"
 )
 
 type (
@@ -173,7 +174,7 @@ func (fs *GroupFileSystem) UploadFile(p, name, folderId string) error {
 		defer fileSingleFlight.Delete(p)
 	}
 
-	file, err := os.OpenFile(p, os.O_RDONLY, 0666)
+	file, err := os.OpenFile(p, os.O_RDONLY, 0o666)
 	if err != nil {
 		return errors.Wrap(err, "open file error")
 	}
diff --git a/client/group_msg.go b/client/group_msg.go
index 3fb7fcf9..bc7fb64d 100644
--- a/client/group_msg.go
+++ b/client/group_msg.go
@@ -631,7 +631,7 @@ func (c *QQClient) GetGroupEssenceMsgList(groupCode int64) ([]GroupDigest, error
 	}
 	rsp = rsp[bytes.Index(rsp, []byte("window.__INITIAL_STATE__={"))+25:]
 	rsp = rsp[:bytes.Index(rsp, []byte("</script>"))]
-	var data = &struct {
+	data := &struct {
 		List []GroupDigest `json:"msgList"`
 	}{}
 	err = json.Unmarshal(rsp, data)
diff --git a/client/group_notice.go b/client/group_notice.go
index 0c43afca..a47654cc 100644
--- a/client/group_notice.go
+++ b/client/group_notice.go
@@ -11,8 +11,9 @@ import (
 	"net/url"
 	"strconv"
 
-	"github.com/Mrs4s/MiraiGo/utils"
 	"github.com/pkg/errors"
+
+	"github.com/Mrs4s/MiraiGo/utils"
 )
 
 type noticePicUpResponse struct {
@@ -29,7 +30,7 @@ type noticeImage struct {
 
 func (c *QQClient) uploadGroupNoticePic(img []byte) (*noticeImage, error) {
 	buf := new(bytes.Buffer)
-	var w = multipart.NewWriter(buf)
+	w := multipart.NewWriter(buf)
 	err := w.WriteField("bkn", strconv.Itoa(c.getCSRFToken()))
 	if err != nil {
 		return nil, errors.Wrap(err, "write multipart<bkn> failed")
diff --git a/client/highway.go b/client/highway.go
index cc06270e..07c1e45f 100644
--- a/client/highway.go
+++ b/client/highway.go
@@ -37,7 +37,7 @@ func (c *QQClient) highwayUploadStream(ip uint32, port int, updKey []byte, strea
 	h := md5.New()
 	length, _ := io.Copy(h, stream)
 	fh := h.Sum(nil)
-	chunkSize := 8192 * 8
+	const chunkSize = 8192 * 8
 	_, _ = stream.Seek(0, io.SeekStart)
 	conn, err := net.DialTCP("tcp", nil, &addr)
 	if err != nil {
@@ -46,8 +46,11 @@ func (c *QQClient) highwayUploadStream(ip uint32, port int, updKey []byte, strea
 	defer conn.Close()
 	offset := 0
 	reader := binary.NewNetworkReader(conn)
+	chunk := make([]byte, chunkSize)
+	w := binary.NewWriter()
+	defer binary.PutBuffer(w)
 	for {
-		chunk := make([]byte, chunkSize)
+		chunk = chunk[:chunkSize]
 		rl, err := io.ReadFull(stream, chunk)
 		if errors.Is(err, io.EOF) {
 			break
@@ -78,14 +81,14 @@ func (c *QQClient) highwayUploadStream(ip uint32, port int, updKey []byte, strea
 			ReqExtendinfo: EmptyBytes,
 		})
 		offset += rl
-		_, err = conn.Write(binary.NewWriterF(func(w *binary.Writer) {
-			w.WriteByte(40)
-			w.WriteUInt32(uint32(len(head)))
-			w.WriteUInt32(uint32(len(chunk)))
-			w.Write(head)
-			w.Write(chunk)
-			w.WriteByte(41)
-		}))
+		w.Reset()
+		w.WriteByte(40)
+		w.WriteUInt32(uint32(len(head)))
+		w.WriteUInt32(uint32(len(chunk)))
+		w.Write(head)
+		w.Write(chunk)
+		w.WriteByte(41)
+		_, err = conn.Write(w.Bytes())
 		if err != nil {
 			return errors.Wrap(err, "write conn error")
 		}
@@ -100,7 +103,7 @@ func (c *QQClient) highwayUploadStream(ip uint32, port int, updKey []byte, strea
 	return nil
 }
 
-func (c *QQClient) highwayUploadByBDH(stream io.ReadSeeker, cmdId int32, ticket, ext []byte, encrypt bool) ([]byte, error) {
+func (c *QQClient) highwayUploadByBDH(stream io.Reader, length int64, cmdId int32, ticket, sum, ext []byte, encrypt bool) ([]byte, error) {
 	if len(c.srvSsoAddrs) == 0 {
 		return nil, errors.New("srv addrs not found. maybe miss some packet?")
 	}
@@ -110,11 +113,7 @@ func (c *QQClient) highwayUploadByBDH(stream io.ReadSeeker, cmdId int32, ticket,
 		}
 		ext = binary.NewTeaCipher(c.highwaySession.SessionKey).Encrypt(ext)
 	}
-	h := md5.New()
-	length, _ := io.Copy(h, stream)
-	fh := h.Sum(nil)
-	chunkSize := 8192 * 16
-	_, _ = stream.Seek(0, io.SeekStart)
+	const chunkSize = 8192 * 16
 	conn, err := net.DialTimeout("tcp", c.srvSsoAddrs[0], time.Second*20)
 	if err != nil {
 		return nil, errors.Wrap(err, "connect error")
@@ -129,8 +128,11 @@ func (c *QQClient) highwayUploadByBDH(stream io.ReadSeeker, cmdId int32, ticket,
 		return nil, errors.Wrap(err, "echo error")
 	}
 	var rspExt []byte
+	chunk := make([]byte, chunkSize)
+	w := binary.NewWriter()
+	defer binary.PutBuffer(w)
 	for {
-		chunk := make([]byte, chunkSize)
+		chunk = chunk[:chunkSize]
 		rl, err := io.ReadFull(stream, chunk)
 		if errors.Is(err, io.EOF) {
 			break
@@ -156,19 +158,19 @@ func (c *QQClient) highwayUploadByBDH(stream io.ReadSeeker, cmdId int32, ticket,
 				Datalength:    int32(rl),
 				Serviceticket: ticket,
 				Md5:           ch[:],
-				FileMd5:       fh[:],
+				FileMd5:       sum,
 			},
 			ReqExtendinfo: ext,
 		})
 		offset += rl
-		_, err = conn.Write(binary.NewWriterF(func(w *binary.Writer) {
-			w.WriteByte(40)
-			w.WriteUInt32(uint32(len(head)))
-			w.WriteUInt32(uint32(len(chunk)))
-			w.Write(head)
-			w.Write(chunk)
-			w.WriteByte(41)
-		}))
+		w.Reset()
+		w.WriteByte(40)
+		w.WriteUInt32(uint32(len(head)))
+		w.WriteUInt32(uint32(len(chunk)))
+		w.Write(head)
+		w.Write(chunk)
+		w.WriteByte(41)
+		_, err = conn.Write(w.Bytes())
 		if err != nil {
 			return nil, errors.Wrap(err, "write conn error")
 		}
@@ -203,22 +205,23 @@ func (c *QQClient) highwayUploadFileMultiThreadingByBDH(path string, cmdId int32
 	if err != nil {
 		return nil, errors.Wrap(err, "get stat error")
 	}
-	file, err := os.OpenFile(path, os.O_RDONLY, 0666)
+	file, err := os.OpenFile(path, os.O_RDONLY, 0o666)
 	if err != nil {
 		return nil, errors.Wrap(err, "open file error")
 	}
 	defer file.Close()
+	h := md5.New()
+	length, _ := io.Copy(h, file)
+	fh := h.Sum(nil)
+	_, _ = file.Seek(0, io.SeekStart)
 	if stat.Size() < 1024*1024*3 {
-		return c.highwayUploadByBDH(file, cmdId, ticket, ext, false)
+		return c.highwayUploadByBDH(file, length, cmdId, ticket, fh, ext, false)
 	}
 	type BlockMetaData struct {
 		Id          int
 		BeginOffset int64
 		EndOffset   int64
 	}
-	h := md5.New()
-	_, _ = io.Copy(h, file)
-	fh := h.Sum(nil)
 	const blockSize int64 = 1024 * 512
 	var (
 		blocks        []*BlockMetaData
@@ -251,7 +254,7 @@ func (c *QQClient) highwayUploadFileMultiThreadingByBDH(path string, cmdId int32
 			return errors.Wrap(err, "connect error")
 		}
 		defer conn.Close()
-		chunk, _ := os.OpenFile(path, os.O_RDONLY, 0666)
+		chunk, _ := os.OpenFile(path, os.O_RDONLY, 0o666)
 		defer chunk.Close()
 		reader := binary.NewNetworkReader(conn)
 		if err = c.highwaySendHeartbreak(conn); err != nil {
@@ -278,7 +281,7 @@ func (c *QQClient) highwayUploadFileMultiThreadingByBDH(path string, cmdId int32
 			}
 			buffer := make([]byte, blockSize)
 			_, _ = chunk.Seek(block.BeginOffset, io.SeekStart)
-			ri, err := io.ReadFull(chunk, buffer)
+			ri, err := io.ReadFull(chunk, buffer) // todo: reuse buffer
 			if err != nil {
 				if err == io.EOF {
 					break
@@ -311,14 +314,15 @@ func (c *QQClient) highwayUploadFileMultiThreadingByBDH(path string, cmdId int32
 				},
 				ReqExtendinfo: ext,
 			})
-			_, err = conn.Write(binary.NewWriterF(func(w *binary.Writer) {
-				w.WriteByte(40)
-				w.WriteUInt32(uint32(len(head)))
-				w.WriteUInt32(uint32(len(buffer)))
-				w.Write(head)
-				w.Write(buffer)
-				w.WriteByte(41)
-			}))
+			w := binary.NewWriter()
+			w.WriteByte(40)
+			w.WriteUInt32(uint32(len(head)))
+			w.WriteUInt32(uint32(len(buffer)))
+			w.Write(head)
+			w.Write(buffer)
+			w.WriteByte(41)
+			_, err = conn.Write(w.Bytes())
+			binary.PutBuffer(w)
 			if err != nil {
 				return errors.Wrap(err, "write conn error")
 			}
@@ -364,13 +368,14 @@ func (c *QQClient) highwaySendHeartbreak(conn net.Conn) error {
 			LocaleId:  2052,
 		},
 	})
-	_, err := conn.Write(binary.NewWriterF(func(w *binary.Writer) {
-		w.WriteByte(40)
-		w.WriteUInt32(uint32(len(head)))
-		w.WriteUInt32(0)
-		w.Write(head)
-		w.WriteByte(41)
-	}))
+	w := binary.NewWriter()
+	w.WriteByte(40)
+	w.WriteUInt32(uint32(len(head)))
+	w.WriteUInt32(0)
+	w.Write(head)
+	w.WriteByte(41)
+	_, err := conn.Write(w.Bytes())
+	binary.PutBuffer(w)
 	return err
 }
 
@@ -400,8 +405,12 @@ func (c *QQClient) excitingUploadStream(stream io.ReadSeeker, cmdId int32, ticke
 		offset    int64 = 0
 		chunkSize       = 524288
 	)
+	chunk := make([]byte, chunkSize)
+	w := binary.NewWriter()
+	w.Reset()
+	w.Grow(600 * 1024) // 复用,600k 不要放回池中
 	for {
-		chunk := make([]byte, chunkSize)
+		chunk = chunk[:chunkSize]
 		rl, err := io.ReadFull(stream, chunk)
 		if err == io.EOF {
 			break
@@ -432,15 +441,14 @@ func (c *QQClient) excitingUploadStream(stream io.ReadSeeker, cmdId int32, ticke
 			ReqExtendinfo: ext,
 		})
 		offset += int64(rl)
-		io.Pipe()
-		req, _ := http.NewRequest("POST", url, bytes.NewReader(binary.NewWriterF(func(w *binary.Writer) {
-			w.WriteByte(40)
-			w.WriteUInt32(uint32(len(head)))
-			w.WriteUInt32(uint32(len(chunk)))
-			w.Write(head)
-			w.Write(chunk)
-			w.WriteByte(41)
-		})))
+		w.Reset()
+		w.WriteByte(40)
+		w.WriteUInt32(uint32(len(head)))
+		w.WriteUInt32(uint32(len(chunk)))
+		w.Write(head)
+		w.Write(chunk)
+		w.WriteByte(41)
+		req, _ := http.NewRequest("POST", url, bytes.NewReader(w.Bytes()))
 		req.Header.Set("Accept", "*/*")
 		req.Header.Set("Connection", "Keep-Alive")
 		req.Header.Set("User-Agent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1)")
@@ -504,7 +512,7 @@ func (c *QQClient) uploadGroupHeadPortrait(groupCode int64, img []byte) error {
 		groupCode,
 		len(img),
 	)
-	req, err := http.NewRequest("POST", url, bytes.NewReader(img))
+	req, _ := http.NewRequest("POST", url, bytes.NewReader(img))
 	req.Header["User-Agent"] = []string{"Dalvik/2.1.0 (Linux; U; Android 7.1.2; PCRT00 Build/N2G48H)"}
 	req.Header["Content-Type"] = []string{"multipart/form-data;boundary=****"}
 	rsp, err := http.DefaultClient.Do(req)
diff --git a/client/honor.go b/client/honor.go
index 9081693c..3a3daa7a 100644
--- a/client/honor.go
+++ b/client/honor.go
@@ -31,9 +31,9 @@ type (
 )
 
 const (
-	Talkative    HonorType = 1 //龙王
-	Performer    HonorType = 2 //群聊之火
-	Legend       HonorType = 3 //群聊炙焰
-	StrongNewbie HonorType = 5 //冒尖小春笋
-	Emotion      HonorType = 6 //快乐源泉
+	Talkative    HonorType = 1 // 龙王
+	Performer    HonorType = 2 // 群聊之火
+	Legend       HonorType = 3 // 群聊炙焰
+	StrongNewbie HonorType = 5 // 冒尖小春笋
+	Emotion      HonorType = 6 // 快乐源泉
 )
diff --git a/client/image.go b/client/image.go
index 27193389..15000cc5 100644
--- a/client/image.go
+++ b/client/image.go
@@ -13,13 +13,14 @@ import (
 	"github.com/Mrs4s/MiraiGo/client/pb/highway"
 	"github.com/Mrs4s/MiraiGo/client/pb/oidb"
 
+	"github.com/pkg/errors"
+	"google.golang.org/protobuf/proto"
+
 	"github.com/Mrs4s/MiraiGo/binary"
 	"github.com/Mrs4s/MiraiGo/client/pb"
 	"github.com/Mrs4s/MiraiGo/message"
 	"github.com/Mrs4s/MiraiGo/protocol/packets"
 	"github.com/Mrs4s/MiraiGo/utils"
-	"github.com/pkg/errors"
-	"google.golang.org/protobuf/proto"
 )
 
 func init() {
@@ -48,7 +49,7 @@ func (c *QQClient) UploadGroupImage(groupCode int64, img io.ReadSeeker) (*messag
 			c.srvSsoAddrs = append(c.srvSsoAddrs, fmt.Sprintf("%v:%v", binary.UInt32ToIPV4Address(uint32(addr)), rsp.UploadPort[i]))
 		}
 	}
-	if _, err = c.highwayUploadByBDH(img, 2, rsp.UploadKey, EmptyBytes, false); err == nil {
+	if _, err = c.highwayUploadByBDH(img, length, 2, rsp.UploadKey, EmptyBytes, fh, false); err == nil {
 		goto ok
 	}
 	return nil, errors.New("upload failed")
@@ -66,7 +67,7 @@ ok:
 }
 
 func (c *QQClient) UploadGroupImageByFile(groupCode int64, path string) (*message.GroupImageElement, error) {
-	img, err := os.OpenFile(path, os.O_RDONLY, 0666)
+	img, err := os.OpenFile(path, os.O_RDONLY, 0o666)
 	if err != nil {
 		return nil, err
 	}
@@ -137,10 +138,11 @@ func (c *QQClient) ImageOcr(img interface{}) (*OcrResponse, error) {
 	switch e := img.(type) {
 	case *message.GroupImageElement:
 		url = e.Url
-		if b, err := utils.HttpGetBytes(e.Url, ""); err == nil {
-			if url, err = c.uploadOcrImage(bytes.NewReader(b)); err != nil {
+		if b, err := utils.HTTPGetReadCloser(e.Url, ""); err == nil {
+			if url, err = c.uploadOcrImage(b, int64(e.Size), e.Md5); err != nil {
 				url = e.Url
 			}
+			_ = b.Close()
 		}
 		rsp, err := c.sendAndWait(c.buildImageOcrRequestPacket(url, strings.ToUpper(hex.EncodeToString(e.Md5)), e.Size, e.Width, e.Height))
 		if err != nil {
@@ -149,10 +151,11 @@ func (c *QQClient) ImageOcr(img interface{}) (*OcrResponse, error) {
 		return rsp.(*OcrResponse), nil
 	case *message.ImageElement:
 		url = e.Url
-		if b, err := utils.HttpGetBytes(e.Url, ""); err == nil {
-			if url, err = c.uploadOcrImage(bytes.NewReader(b)); err != nil {
+		if b, err := utils.HTTPGetReadCloser(e.Url, ""); err == nil {
+			if url, err = c.uploadOcrImage(b, int64(e.Size), e.Md5); err != nil {
 				url = e.Url
 			}
+			_ = b.Close()
 		}
 		rsp, err := c.sendAndWait(c.buildImageOcrRequestPacket(url, strings.ToUpper(hex.EncodeToString(e.Md5)), e.Size, e.Width, e.Height))
 		if err != nil {
@@ -232,14 +235,14 @@ func (c *QQClient) buildGroupImageStorePacket(groupCode int64, md5 []byte, size
 	return seq, packet
 }
 
-func (c *QQClient) uploadOcrImage(img io.ReadSeeker) (string, error) {
+func (c *QQClient) uploadOcrImage(img io.Reader, length int64, sum []byte) (string, error) {
 	r := make([]byte, 16)
 	rand.Read(r)
 	ext, _ := proto.Marshal(&highway.CommFileExtReq{
 		ActionType: proto.Uint32(0),
 		Uuid:       binary.GenUUID(r),
 	})
-	rsp, err := c.highwayUploadByBDH(img, 76, c.highwaySession.SigSession, ext, false)
+	rsp, err := c.highwayUploadByBDH(img, length, 76, c.highwaySession.SigSession, sum, ext, false)
 	if err != nil {
 		return "", errors.Wrap(err, "upload ocr image error")
 	}
@@ -316,9 +319,9 @@ func decodeImageOcrResponse(_ *QQClient, _ *incomingPacketInfo, payload []byte)
 	if rsp.RetCode != 0 {
 		return nil, errors.Errorf("server error, code: %v msg: %v", rsp.RetCode, rsp.ErrMsg)
 	}
-	var texts = make([]*TextDetection, 0, len(rsp.OcrRspBody.TextDetections))
+	texts := make([]*TextDetection, 0, len(rsp.OcrRspBody.TextDetections))
 	for _, text := range rsp.OcrRspBody.TextDetections {
-		var points = make([]*Coordinate, 0, len(text.Polygon.Coordinates))
+		points := make([]*Coordinate, 0, len(text.Polygon.Coordinates))
 		for _, c := range text.Polygon.Coordinates {
 			points = append(points, &Coordinate{
 				X: c.X,
diff --git a/client/notify.go b/client/notify.go
index 0d010020..e41940cd 100644
--- a/client/notify.go
+++ b/client/notify.go
@@ -40,7 +40,7 @@ type (
 // grayTipProcessor 提取出来专门用于处理群内 notify tips
 func (c *QQClient) grayTipProcessor(groupID int64, tipInfo *notify.GeneralGrayTipInfo) {
 	if tipInfo.BusiType == 12 && tipInfo.BusiId == 1061 {
-		var sender = int64(0)
+		sender := int64(0)
 		receiver := c.Uin
 		for _, templ := range tipInfo.MsgTemplParam {
 			if templ.Name == "uin_str1" {
diff --git a/client/online_push.go b/client/online_push.go
index 965e205d..4b93f144 100644
--- a/client/online_push.go
+++ b/client/online_push.go
@@ -7,12 +7,13 @@ import (
 
 	"github.com/Mrs4s/MiraiGo/client/pb/msgtype0x210"
 
+	"github.com/pkg/errors"
+	"google.golang.org/protobuf/proto"
+
 	"github.com/Mrs4s/MiraiGo/binary"
 	"github.com/Mrs4s/MiraiGo/binary/jce"
 	"github.com/Mrs4s/MiraiGo/client/pb"
 	"github.com/Mrs4s/MiraiGo/client/pb/notify"
-	"github.com/pkg/errors"
-	"google.golang.org/protobuf/proto"
 )
 
 var msg0x210Decoders = map[int64]func(*QQClient, []byte) error{
@@ -90,7 +91,7 @@ func decodeOnlinePushReqPacket(c *QQClient, info *incomingPacketInfo, payload []
 					}
 				}
 				if b.QqGroupDigestMsg != nil {
-					var digest = b.QqGroupDigestMsg
+					digest := b.QqGroupDigestMsg
 					c.dispatchGroupDigestEvent(&GroupDigestEvent{
 						GroupCode:         int64(digest.GroupCode),
 						MessageID:         int32(digest.Seq),
diff --git a/client/private_msg.go b/client/private_msg.go
index 45360dd4..6026a752 100644
--- a/client/private_msg.go
+++ b/client/private_msg.go
@@ -6,10 +6,11 @@ import (
 
 	"github.com/pkg/errors"
 
+	"github.com/golang/protobuf/proto"
+
 	"github.com/Mrs4s/MiraiGo/client/pb/msg"
 	"github.com/Mrs4s/MiraiGo/message"
 	"github.com/Mrs4s/MiraiGo/protocol/packets"
-	"github.com/golang/protobuf/proto"
 )
 
 func (c *QQClient) SendPrivateMessage(target int64, m *message.SendingMessage) *message.PrivateMessage {
diff --git a/client/ptt.go b/client/ptt.go
index c1ba6227..a7f64a60 100644
--- a/client/ptt.go
+++ b/client/ptt.go
@@ -31,7 +31,7 @@ func (c *QQClient) UploadGroupPtt(groupCode int64, voice io.ReadSeeker) (*messag
 	fh := h.Sum(nil)
 	_, _ = voice.Seek(0, io.SeekStart)
 	ext := c.buildGroupPttStoreBDHExt(groupCode, fh[:], int32(length), 0, int32(length))
-	rsp, err := c.highwayUploadByBDH(voice, 29, c.highwaySession.SigSession, ext, false)
+	rsp, err := c.highwayUploadByBDH(voice, length, 29, c.highwaySession.SigSession, fh, ext, false)
 	if err != nil {
 		return nil, err
 	}
@@ -55,7 +55,8 @@ func (c *QQClient) UploadGroupPtt(groupCode int64, voice io.ReadSeeker) (*messag
 			GroupFileKey: pkt.MsgTryUpPttRsp[0].FileKey,
 			BoolValid:    proto.Bool(true),
 			PbReserve:    []byte{8, 0, 40, 0, 56, 0},
-		}}, nil
+		},
+	}, nil
 }
 
 // UploadPrivatePtt 将语音数据使用好友语音通道上传到服务器, 返回 message.PrivateVoiceElement 可直接发送
@@ -65,7 +66,7 @@ func (c *QQClient) UploadPrivatePtt(target int64, voice io.ReadSeeker) (*message
 	fh := h.Sum(nil)
 	_, _ = voice.Seek(0, io.SeekStart)
 	ext := c.buildC2CPttStoreBDHExt(target, fh[:], int32(length), int32(length))
-	rsp, err := c.highwayUploadByBDH(voice, 26, c.highwaySession.SigSession, ext, false)
+	rsp, err := c.highwayUploadByBDH(voice, length, 26, c.highwaySession.SigSession, fh, ext, false)
 	if err != nil {
 		return nil, err
 	}
@@ -89,7 +90,8 @@ func (c *QQClient) UploadPrivatePtt(target int64, voice io.ReadSeeker) (*message
 			FileSize: proto.Int32(int32(length)),
 			// Reserve:   constructPTTExtraInfo(1, int32(len(voice))), // todo length
 			BoolValid: proto.Bool(true),
-		}}, nil
+		},
+	}, nil
 }
 
 // UploadGroupShortVideo 将视频和封面上传到服务器, 返回 message.ShortVideoElement 可直接发送
@@ -117,22 +119,27 @@ func (c *QQClient) UploadGroupShortVideo(groupCode int64, video, thumb io.ReadSe
 	}
 	ext, _ := proto.Marshal(c.buildPttGroupShortVideoProto(videoHash, thumbHash, groupCode, videoLen, thumbLen).PttShortVideoUploadReq)
 	var hwRsp []byte
+	multi := utils.MultiReadSeeker(thumb, video)
+	h := md5.New()
+	length, _ := io.Copy(h, multi)
+	fh := h.Sum(nil)
+	_, _ = multi.Seek(0, io.SeekStart)
 	if cache != "" {
 		var file *os.File
-		file, err = os.OpenFile(cache, os.O_WRONLY|os.O_CREATE, 0666)
+		file, err = os.OpenFile(cache, os.O_WRONLY|os.O_CREATE, 0o666)
 		cp := func() error {
 			_, err := io.Copy(file, utils.MultiReadSeeker(thumb, video))
 			return err
 		}
 		if err != nil || cp() != nil {
-			hwRsp, err = c.highwayUploadByBDH(utils.MultiReadSeeker(thumb, video), 25, c.highwaySession.SigSession, ext, true)
+			hwRsp, err = c.highwayUploadByBDH(multi, length, 25, c.highwaySession.SigSession, fh, ext, true)
 		} else {
 			_ = file.Close()
 			hwRsp, err = c.highwayUploadFileMultiThreadingByBDH(cache, 25, 8, c.highwaySession.SigSession, ext, true)
 			_ = os.Remove(cache)
 		}
 	} else {
-		hwRsp, err = c.highwayUploadByBDH(utils.MultiReadSeeker(thumb, video), 25, c.highwaySession.SigSession, ext, true)
+		hwRsp, err = c.highwayUploadByBDH(multi, length, 25, c.highwaySession.SigSession, fh, ext, true)
 	}
 	if err != nil {
 		return nil, errors.Wrap(err, "upload video file error")
@@ -279,7 +286,7 @@ func decodeGroupPttStoreResponse(_ *QQClient, _ *incomingPacketInfo, payload []b
 	if rsp.BoolFileExit {
 		return pttUploadResponse{IsExists: true}, nil
 	}
-	var ip = make([]string, 0, len(rsp.Uint32UpIp))
+	ip := make([]string, 0, len(rsp.Uint32UpIp))
 	for _, i := range rsp.Uint32UpIp {
 		ip = append(ip, binary.UInt32ToIPV4Address(uint32(i)))
 	}
diff --git a/client/sync.go b/client/sync.go
index a0812e47..c5030e53 100644
--- a/client/sync.go
+++ b/client/sync.go
@@ -56,7 +56,7 @@ func (c *QQClient) GetAllowedClients() ([]*OtherClientInfo, error) {
 		return nil, err
 	}
 	list := i.([]jce.SvcDevLoginInfo)
-	var ret = make([]*OtherClientInfo, 0, len(list))
+	ret := make([]*OtherClientInfo, 0, len(list))
 	for _, l := range list {
 		ret = append(ret, &OtherClientInfo{
 			AppId:      l.AppId,
@@ -208,7 +208,8 @@ func (c *QQClient) buildSyncMsgRequestPacket() (uint16, []byte) {
 				Type:    proto.Uint32(283),
 				Version: proto.Uint32(0),
 			},
-		}})
+		},
+	})
 	regReq := &jce.SvcReqRegisterNew{
 		RequestOptional:   128 | 64 | 256 | 2 | 8192 | 16384 | 65536,
 		DisGroupMsgFilter: 1,
diff --git a/client/tlv_decoders.go b/client/tlv_decoders.go
index 4f97d9e3..70ed6500 100644
--- a/client/tlv_decoders.go
+++ b/client/tlv_decoders.go
@@ -43,24 +43,24 @@ func (c *QQClient) decodeT119(data, ek []byte) {
 	}
 
 	var (
-		//openId   []byte
-		//openKey  []byte
-		//payToken []byte
-		//pf       []byte
-		//pfkey    []byte
+		// openId   []byte
+		// openKey  []byte
+		// payToken []byte
+		// pf       []byte
+		// pfkey    []byte
 		gender uint16 = 0
 		age    uint16 = 0
 		nick          = ""
-		//a1       []byte
-		//noPicSig []byte
-		//ctime           = time.Now().Unix()
-		//etime           = ctime + 2160000
+		// a1       []byte
+		// noPicSig []byte
+		// ctime           = time.Now().Unix()
+		// etime           = ctime + 2160000
 		psKeyMap    map[string][]byte
 		pt4TokenMap map[string][]byte
 	)
 
 	if _, ok := m[0x125]; ok {
-		//openId, openKey = readT125(t125)
+		// openId, openKey = readT125(t125)
 	}
 	if t186, ok := m[0x186]; ok {
 		c.decodeT186(t186)
@@ -69,20 +69,20 @@ func (c *QQClient) decodeT119(data, ek []byte) {
 		nick, age, gender = readT11A(t11a)
 	}
 	if _, ok := m[0x199]; ok {
-		//openId, payToken = readT199(t199)
+		// openId, payToken = readT199(t199)
 	}
 	if _, ok := m[0x200]; ok {
-		//pf, pfkey = readT200(t200)
+		// pf, pfkey = readT200(t200)
 	}
 	if t512, ok := m[0x512]; ok {
 		psKeyMap, pt4TokenMap = readT512(t512)
 	}
 	if _, ok := m[0x531]; ok {
-		//a1, noPicSig = readT531(t531)
+		// a1, noPicSig = readT531(t531)
 	}
 
 	if _, ok := m[0x138]; ok {
-		//readT138(t138) // chg time
+		// readT138(t138) // chg time
 	}
 
 	c.sigInfo = &loginSigInfo{
diff --git a/message/elements.go b/message/elements.go
index cb777b2c..461362cd 100644
--- a/message/elements.go
+++ b/message/elements.go
@@ -86,7 +86,7 @@ type ReplyElement struct {
 	Time     int32
 	Elements []IMessageElement
 
-	//original []*msg.Elem
+	// original []*msg.Elem
 }
 
 type ShortVideoElement struct {
@@ -241,7 +241,7 @@ func NewReply(m *GroupMessage) *ReplyElement {
 		ReplySeq: m.Id,
 		Sender:   m.Sender.Uin,
 		Time:     m.Time,
-		//original: m.OriginalElements,
+		// original: m.OriginalElements,
 		Elements: m.Elements,
 	}
 }
@@ -271,9 +271,10 @@ func NewUrlShare(url, title, content, image string) *ServiceElement {
 		SubType: "UrlShare",
 	}
 }
+
 func NewRichXml(template string, ResId int64) *ServiceElement {
 	if ResId == 0 {
-		ResId = 60 //默认值60
+		ResId = 60 // 默认值60
 	}
 	return &ServiceElement{
 		Id:      int32(ResId),
diff --git a/message/generate.go b/message/generate.go
index 279eb1e6..6d61bb92 100644
--- a/message/generate.go
+++ b/message/generate.go
@@ -36,7 +36,7 @@ var faceMap = map[int]string{
 `
 
 func main() {
-	f, _ := os.OpenFile("face.go", os.O_WRONLY|os.O_CREATE|os.O_SYNC|os.O_TRUNC, 0755)
+	f, _ := os.OpenFile("face.go", os.O_WRONLY|os.O_CREATE|os.O_SYNC|os.O_TRUNC, 0o755)
 	defer func() { _ = f.Close() }()
 	resp, err := http.Get(faceDownloadUrl)
 	if err != nil {
diff --git a/message/message.go b/message/message.go
index 799ac895..62de8d8e 100644
--- a/message/message.go
+++ b/message/message.go
@@ -46,7 +46,7 @@ type (
 		Time           int32
 		Elements       []IMessageElement
 		OriginalObject *msg.Message
-		//OriginalElements []*msg.Elem
+		// OriginalElements []*msg.Elem
 	}
 
 	SendingMessage struct {
@@ -327,7 +327,7 @@ func ToProtoElems(elems []IMessageElement, generalFlags bool) (r []*msg.Elem) {
 					})
 					break L
 				}
-				//d, _ := hex.DecodeString("08097800C80100F00100F80100900200C80200980300A00320B00300C00300D00300E803008A04020803900480808010B80400C00400")
+				// d, _ := hex.DecodeString("08097800C80100F00100F80100900200C80200980300A00320B00300C00300D00300E803008A04020803900480808010B80400C00400")
 				r = append(r, &msg.Elem{
 					GeneralFlags: &msg.GeneralFlags{
 						PbReserve: []byte{
@@ -590,7 +590,7 @@ func (forMsg *ForwardMessage) CalculateValidationDataForward(seq, random int32,
 }
 
 func (forMsg *ForwardMessage) packForwardMsg(seq int32, random int32, groupCode int64) []*msg.Message {
-	var msgs = make([]*msg.Message, 0, len(forMsg.Nodes))
+	msgs := make([]*msg.Message, 0, len(forMsg.Nodes))
 	for _, node := range forMsg.Nodes {
 		msgs = append(msgs, &msg.Message{
 			Head: &msg.MessageHead{
diff --git a/message/pack.go b/message/pack.go
index f0b86b8f..5b0e6cc8 100644
--- a/message/pack.go
+++ b/message/pack.go
@@ -8,9 +8,11 @@ import (
 	"google.golang.org/protobuf/proto"
 )
 
-var imgOld = []byte{0x15, 0x36, 0x20, 0x39, 0x32, 0x6B, 0x41, 0x31, 0x00, 0x38, 0x37, 0x32, 0x66, 0x30, 0x36, 0x36, 0x30, 0x33, 0x61, 0x65, 0x31, 0x30, 0x33, 0x62, 0x37, 0x20, 0x20, 0x20, 0x20, 0x20,
+var imgOld = []byte{
+	0x15, 0x36, 0x20, 0x39, 0x32, 0x6B, 0x41, 0x31, 0x00, 0x38, 0x37, 0x32, 0x66, 0x30, 0x36, 0x36, 0x30, 0x33, 0x61, 0x65, 0x31, 0x30, 0x33, 0x62, 0x37, 0x20, 0x20, 0x20, 0x20, 0x20,
 	0x20, 0x35, 0x30, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x7B, 0x30, 0x31, 0x45, 0x39, 0x34, 0x35, 0x31, 0x42, 0x2D, 0x37, 0x30, 0x45, 0x44,
-	0x2D, 0x45, 0x41, 0x45, 0x33, 0x2D, 0x42, 0x33, 0x37, 0x43, 0x2D, 0x31, 0x30, 0x31, 0x46, 0x31, 0x45, 0x45, 0x42, 0x46, 0x35, 0x42, 0x35, 0x7D, 0x2E, 0x70, 0x6E, 0x67, 0x41}
+	0x2D, 0x45, 0x41, 0x45, 0x33, 0x2D, 0x42, 0x33, 0x37, 0x43, 0x2D, 0x31, 0x30, 0x31, 0x46, 0x31, 0x45, 0x45, 0x42, 0x46, 0x35, 0x42, 0x35, 0x7D, 0x2E, 0x70, 0x6E, 0x67, 0x41,
+}
 
 func (e *TextElement) Pack() (r []*msg.Elem) {
 	r = append(r, &msg.Elem{
@@ -93,7 +95,7 @@ func (e *GroupImageElement) Pack() (r []*msg.Elem) {
 		CustomFace: &msg.CustomFace{
 			FileType: proto.Int32(66),
 			Useful:   proto.Int32(1),
-			//Origin:    1,
+			// Origin:    1,
 			BizType:   proto.Int32(5),
 			Width:     &e.Width,
 			Height:    &e.Height,
@@ -103,7 +105,7 @@ func (e *GroupImageElement) Pack() (r []*msg.Elem) {
 			Size:      &e.Size,
 			Md5:       e.Md5,
 			Flag:      make([]byte, 4),
-			//OldData:  imgOld,
+			// OldData:  imgOld,
 		},
 	})
 	return
@@ -252,7 +254,7 @@ func (e *GroupShowPicElement) Pack() (r []*msg.Elem) {
 			Size:      &e.Size,
 			Md5:       e.Md5,
 			Flag:      []byte{0x11, 0x00, 0x00, 0x00},
-			//OldData:  imgOld,
+			// OldData:  imgOld,
 			PbReserve: reserve,
 		},
 	})
diff --git a/protocol/crypto/crypto.go b/protocol/crypto/crypto.go
index bfe7be6e..7de323e2 100644
--- a/protocol/crypto/crypto.go
+++ b/protocol/crypto/crypto.go
@@ -96,7 +96,7 @@ func (e *EncryptECDH) FetchPubKey(uin int64) {
 		return
 	}
 	defer resp.Body.Close()
-	var pubKey = pubKeyResp{}
+	pubKey := pubKeyResp{}
 	err = jsoniter.NewDecoder(resp.Body).Decode(&pubKey)
 	if err != nil {
 		return
diff --git a/protocol/packets/global.go b/protocol/packets/global.go
index 2da69db9..48377f5b 100644
--- a/protocol/packets/global.go
+++ b/protocol/packets/global.go
@@ -8,11 +8,13 @@ import (
 	"github.com/pkg/errors"
 )
 
-var ErrUnknownFlag = errors.New("unknown flag")
-var ErrInvalidPayload = errors.New("invalid payload")
-var ErrDecryptFailed = errors.New("decrypt failed")
-var ErrSessionExpired = errors.New("session expired")
-var ErrPacketDropped = errors.New("packet dropped")
+var (
+	ErrUnknownFlag    = errors.New("unknown flag")
+	ErrInvalidPayload = errors.New("invalid payload")
+	ErrDecryptFailed  = errors.New("decrypt failed")
+	ErrSessionExpired = errors.New("session expired")
+	ErrPacketDropped  = errors.New("packet dropped")
+)
 
 type ISendingPacket interface {
 	CommandId() uint16
@@ -109,7 +111,7 @@ func ParseIncomingPacket(payload, d2key []byte) (*IncomingPacket, error) {
 	flag1 := reader.ReadInt32()
 	flag2 := reader.ReadByte()
 	if reader.ReadByte() != 0 { // flag3
-		//return nil, errors.WithStack(ErrUnknownFlag)
+		// return nil, errors.WithStack(ErrUnknownFlag)
 	}
 	reader.ReadString() // uin string
 	decrypted := func() (data []byte) {
diff --git a/utils/http.go b/utils/http.go
index 9ea9ce06..0b0f2f84 100644
--- a/utils/http.go
+++ b/utils/http.go
@@ -3,6 +3,7 @@ package utils
 import (
 	"bytes"
 	"compress/gzip"
+	"io"
 	"io/ioutil"
 	"net/http"
 	"strings"
@@ -19,32 +20,12 @@ var client = &http.Client{
 
 // HttpGetBytes 带 cookie 的 GET 请求
 func HttpGetBytes(url, cookie string) ([]byte, error) {
-	req, err := http.NewRequest("GET", url, nil)
+	body, err := HTTPGetReadCloser(url, cookie)
+	defer func() { _ = body.Close() }()
 	if err != nil {
 		return nil, err
 	}
-	req.Header["User-Agent"] = []string{"QQ/8.2.0.1296 CFNetwork/1126"}
-	req.Header["Net-Type"] = []string{"Wifi"}
-	if cookie != "" {
-		req.Header["Cookie"] = []string{cookie}
-	}
-	resp, err := client.Do(req)
-	if err != nil {
-		return nil, err
-	}
-	defer resp.Body.Close()
-	body, err := ioutil.ReadAll(resp.Body)
-	if err != nil {
-		return nil, err
-	}
-	if strings.Contains(resp.Header.Get("Content-Encoding"), "gzip") {
-		buffer := bytes.NewBuffer(body)
-		r, _ := gzip.NewReader(buffer)
-		defer r.Close()
-		unCom, err := ioutil.ReadAll(r)
-		return unCom, err
-	}
-	return body, nil
+	return io.ReadAll(body)
 }
 
 func HttpPostBytes(url string, data []byte) ([]byte, error) {
@@ -105,3 +86,52 @@ func HttpPostBytesWithCookie(url string, data []byte, cookie string, contentType
 	}
 	return body, nil
 }
+
+type gzipCloser struct {
+	f io.Closer
+	r *gzip.Reader
+}
+
+// NewGzipReadCloser 从 io.ReadCloser 创建 gunzip io.ReadCloser
+func NewGzipReadCloser(reader io.ReadCloser) (io.ReadCloser, error) {
+	gzipReader, err := gzip.NewReader(reader)
+	if err != nil {
+		return nil, err
+	}
+	return &gzipCloser{
+		f: reader,
+		r: gzipReader,
+	}, nil
+}
+
+// Read impls io.Reader
+func (g *gzipCloser) Read(p []byte) (n int, err error) {
+	return g.r.Read(p)
+}
+
+// Close impls io.Closer
+func (g *gzipCloser) Close() error {
+	_ = g.f.Close()
+	return g.r.Close()
+}
+
+// HTTPGetReadCloser 从 Http url 获取 io.ReadCloser
+func HTTPGetReadCloser(url string, cookie string) (io.ReadCloser, error) {
+	req, err := http.NewRequest("GET", url, nil)
+	if err != nil {
+		return nil, err
+	}
+	req.Header["User-Agent"] = []string{"QQ/8.2.0.1296 CFNetwork/1126"}
+	req.Header["Net-Type"] = []string{"Wifi"}
+	if cookie != "" {
+		req.Header["Cookie"] = []string{cookie}
+	}
+	resp, err := client.Do(req)
+	if err != nil {
+		return nil, err
+	}
+	if strings.Contains(resp.Header.Get("Content-Encoding"), "gzip") {
+		return NewGzipReadCloser(resp.Body)
+	}
+	return resp.Body, err
+}