diff --git a/client/builders.go b/client/builders.go
index 1732e368..b4c7773f 100644
--- a/client/builders.go
+++ b/client/builders.go
@@ -6,7 +6,6 @@ import (
 	"fmt"
 	"github.com/Mrs4s/MiraiGo/client/pb/qweb"
 	"math/rand"
-	"strconv"
 	"time"
 
 	"github.com/golang/protobuf/proto"
@@ -699,52 +698,6 @@ func (c *QQClient) buildGroupImageStorePacket(groupCode int64, md5 []byte, size
 	return seq, packet
 }
 
-func (c *QQClient) buildImageUploadPacket(data, updKey []byte, commandId int32, fmd5 [16]byte) (r [][]byte) {
-	offset := 0
-	binary.ToChunkedBytesF(data, 8192*8, func(chunked []byte) {
-		w := binary.NewWriter()
-		cmd5 := md5.Sum(chunked)
-		head, _ := proto.Marshal(&pb.ReqDataHighwayHead{
-			MsgBasehead: &pb.DataHighwayHead{
-				Version: 1,
-				Uin:     strconv.FormatInt(c.Uin, 10),
-				Command: "PicUp.DataUp",
-				Seq: func() int32 {
-					if commandId == 2 {
-						return c.nextGroupDataTransSeq()
-					}
-					if commandId == 27 {
-						return c.nextHighwayApplySeq()
-					}
-					return c.nextGroupDataTransSeq()
-				}(),
-				Appid:     int32(c.version.AppId),
-				Dataflag:  4096,
-				CommandId: commandId,
-				LocaleId:  2052,
-			},
-			MsgSeghead: &pb.SegHead{
-				Filesize:      int64(len(data)),
-				Dataoffset:    int64(offset),
-				Datalength:    int32(len(chunked)),
-				Serviceticket: updKey,
-				Md5:           cmd5[:],
-				FileMd5:       fmd5[:],
-			},
-			ReqExtendinfo: EmptyBytes,
-		})
-		offset += len(chunked)
-		w.WriteByte(40)
-		w.WriteUInt32(uint32(len(head)))
-		w.WriteUInt32(uint32(len(chunked)))
-		w.Write(head)
-		w.Write(chunked)
-		w.WriteByte(41)
-		r = append(r, w.Bytes())
-	})
-	return
-}
-
 // ProfileService.Pb.ReqSystemMsgNew.Friend
 func (c *QQClient) buildSystemMsgNewFriendPacket() (uint16, []byte) {
 	seq := c.nextSeq()
diff --git a/client/client.go b/client/client.go
index f1675c65..d80edf5b 100644
--- a/client/client.go
+++ b/client/client.go
@@ -574,9 +574,11 @@ func (c *QQClient) SendFriendPoke(target int64) {
 	_, _ = c.sendAndWait(c.buildFriendPokePacket(target))
 }
 
-func (c *QQClient) UploadGroupImage(groupCode int64, img []byte) (*message.GroupImageElement, error) {
-	h := md5.Sum(img)
-	seq, pkt := c.buildGroupImageStorePacket(groupCode, h[:], int32(len(img)))
+func (c *QQClient) UploadGroupImage(groupCode int64, img io.ReadSeeker) (*message.GroupImageElement, error) {
+	h := md5.New()
+	length, _ := io.Copy(h, img)
+	fh := h.Sum(nil)
+	seq, pkt := c.buildGroupImageStorePacket(groupCode, fh[:], int32(length))
 	r, err := c.sendAndWait(seq, pkt)
 	if err != nil {
 		return nil, err
@@ -588,21 +590,32 @@ func (c *QQClient) UploadGroupImage(groupCode int64, img []byte) (*message.Group
 	if rsp.IsExists {
 		goto ok
 	}
-	for i, ip := range rsp.UploadIp {
-		err := c.highwayUpload(uint32(ip), int(rsp.UploadPort[i]), rsp.UploadKey, img, 2)
-		if err != nil {
-			continue
-		}
+	_, _ = img.Seek(0, io.SeekStart)
+	if _, err = c.highwayUploadByBDH(img, 2, rsp.UploadKey, EmptyBytes); err == nil {
 		goto ok
 	}
+
+	/*
+		for i, ip := range rsp.UploadIp {
+			err := c.highwayUpload(uint32(ip), int(rsp.UploadPort[i]), rsp.UploadKey, img, 2)
+			if err != nil {
+				continue
+			}
+			goto ok
+		}
+	*/
 	return nil, errors.New("upload failed")
 ok:
-	i, _, _ := image.DecodeConfig(bytes.NewReader(img))
+	_, _ = img.Seek(0, io.SeekStart)
+	i, _, _ := image.DecodeConfig(img)
 	var imageType int32 = 1000
-	if bytes.HasPrefix(img, []byte{0x47, 0x49, 0x46, 0x38}) {
+	_, _ = img.Seek(0, io.SeekStart)
+	tmp := make([]byte, 4)
+	_, _ = img.Read(tmp)
+	if bytes.Equal(tmp, []byte{0x47, 0x49, 0x46, 0x38}) {
 		imageType = 2000
 	}
-	return message.NewGroupImage(binary.CalculateImageResourceId(h[:]), h[:], rsp.FileId, int32(len(img)), int32(i.Width), int32(i.Height), imageType), nil
+	return message.NewGroupImage(binary.CalculateImageResourceId(fh[:]), fh[:], rsp.FileId, int32(length), int32(i.Width), int32(i.Height), imageType), nil
 }
 
 func (c *QQClient) UploadPrivateImage(target int64, img []byte) (*message.FriendImageElement, error) {
@@ -615,7 +628,7 @@ func (c *QQClient) uploadPrivateImage(target int64, img []byte, count int) (*mes
 	e, err := c.QueryFriendImage(target, h[:], int32(len(img)))
 	if errors.Is(err, ErrNotExists) {
 		// use group highway upload and query again for image id.
-		if _, err = c.UploadGroupImage(target, img); err != nil {
+		if _, err = c.UploadGroupImage(target, bytes.NewReader(img)); err != nil {
 			return nil, err
 		}
 		if count >= 5 {
diff --git a/client/highway.go b/client/highway.go
index 56d9e2ab..7b7ecd7a 100644
--- a/client/highway.go
+++ b/client/highway.go
@@ -19,65 +19,98 @@ import (
 )
 
 func (c *QQClient) highwayUpload(ip uint32, port int, updKey, data []byte, cmdId int32) error {
+	return c.highwayUploadStream(ip, port, updKey, bytes.NewReader(data), cmdId)
+}
+
+func (c *QQClient) highwayUploadStream(ip uint32, port int, updKey []byte, stream io.ReadSeeker, cmdId int32) error {
 	addr := net.TCPAddr{
 		IP:   make([]byte, 4),
 		Port: port,
 	}
 	binary2.LittleEndian.PutUint32(addr.IP, ip)
+	h := md5.New()
+	length, _ := io.Copy(h, stream)
+	fh := h.Sum(nil)
+	chunkSize := 8192 * 8
+	_, _ = stream.Seek(0, io.SeekStart)
 	conn, err := net.DialTCP("tcp", nil, &addr)
 	if err != nil {
-		return errors.Wrap(err, "failed to connect to highway server")
+		return errors.Wrap(err, "connect error")
 	}
 	defer conn.Close()
-	h := md5.Sum(data)
-	pkt := c.buildImageUploadPacket(data, updKey, cmdId, h)
-	r := binary.NewNetworkReader(conn)
-	for _, p := range pkt {
-		_, err = conn.Write(p)
+	offset := 0
+	reader := binary.NewNetworkReader(conn)
+	for {
+		chunk := make([]byte, chunkSize)
+		rl, err := io.ReadFull(stream, chunk)
+		if err == io.EOF {
+			break
+		}
+		if err == io.ErrUnexpectedEOF {
+			chunk = chunk[:rl]
+		}
+		ch := md5.Sum(chunk)
+		head, _ := proto.Marshal(&pb.ReqDataHighwayHead{
+			MsgBasehead: &pb.DataHighwayHead{
+				Version:   1,
+				Uin:       strconv.FormatInt(c.Uin, 10),
+				Command:   "PicUp.DataUp",
+				Seq:       c.nextGroupDataTransSeq(),
+				Appid:     int32(c.version.AppId),
+				Dataflag:  4096,
+				CommandId: cmdId,
+				LocaleId:  2052,
+			},
+			MsgSeghead: &pb.SegHead{
+				Filesize:      length,
+				Dataoffset:    int64(offset),
+				Datalength:    int32(rl),
+				Serviceticket: updKey,
+				Md5:           ch[:],
+				FileMd5:       fh[:],
+			},
+			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)
+		}))
 		if err != nil {
-			return errors.Wrap(err, "failed to write")
+			return errors.Wrap(err, "write conn error")
 		}
-		_, err = r.ReadByte()
+		rspHead, _, err := highwayReadResponse(reader)
 		if err != nil {
-			return errors.Wrap(err, "failed to read byte")
+			return errors.Wrap(err, "highway upload error")
 		}
-		hl, _ := r.ReadInt32()
-		a2, _ := r.ReadInt32()
-		payload, _ := r.ReadBytes(int(hl))
-		_, _ = r.ReadBytes(int(a2))
-		r.ReadByte()
-		rsp := new(pb.RspDataHighwayHead)
-		if err = proto.Unmarshal(payload, rsp); err != nil {
-			return errors.Wrap(err, "failed to unmarshal protobuf message")
-		}
-		if rsp.ErrorCode != 0 {
+		if rspHead.ErrorCode != 0 {
 			return errors.New("upload failed")
 		}
 	}
-
 	return nil
 }
 
-func (c *QQClient) highwayUploadByBDH(stream io.ReadSeeker, cmdId int32, ext []byte) ([]byte, error) {
+func (c *QQClient) highwayUploadByBDH(stream io.ReadSeeker, cmdId int32, ticket, ext []byte) ([]byte, error) {
 	// TODO: encrypted upload support.
 	if len(c.srvSsoAddrs) == 0 {
 		return nil, errors.New("srv addrs not found. maybe miss some packet?")
 	}
-	if c.highwaySession == nil {
-		return nil, errors.New("highway session not found. maybe miss some packet?")
-	}
 	h := md5.New()
 	length, _ := io.Copy(h, stream)
-	chunkSize := 8192 * 8
+	chunkSize := 8192 * 16
 	fh := h.Sum(nil)
 	_, _ = stream.Seek(0, io.SeekStart)
 	conn, err := net.DialTimeout("tcp", c.srvSsoAddrs[0], time.Second*20)
 	if err != nil {
 		return nil, errors.Wrap(err, "connect error")
 	}
+	defer conn.Close()
 	offset := 0
 	reader := binary.NewNetworkReader(conn)
-	ticket := c.highwaySession.SigSession
 	if err = c.highwaySendHeartbreak(conn); err != nil {
 		return nil, errors.Wrap(err, "echo error")
 	}
diff --git a/client/ptt.go b/client/ptt.go
index 43c9a22f..49b60f3c 100644
--- a/client/ptt.go
+++ b/client/ptt.go
@@ -1,9 +1,9 @@
 package client
 
 import (
-	"bytes"
 	"crypto/md5"
 	"encoding/hex"
+	"io"
 
 	"github.com/Mrs4s/MiraiGo/binary"
 	"github.com/Mrs4s/MiraiGo/client/pb"
@@ -18,10 +18,13 @@ import (
 // 语音相关处理逻辑
 
 // UploadGroupPtt 将语音数据使用群语音通道上传到服务器, 返回 message.GroupVoiceElement 可直接发送
-func (c *QQClient) UploadGroupPtt(groupCode int64, voice []byte) (*message.GroupVoiceElement, error) {
-	h := md5.Sum(voice)
-	ext := c.buildGroupPttStoreBDHExt(groupCode, h[:], int32(len(voice)), 0, int32(len(voice)))
-	rsp, err := c.highwayUploadByBDH(bytes.NewReader(voice), 29, ext)
+func (c *QQClient) UploadGroupPtt(groupCode int64, voice io.ReadSeeker) (*message.GroupVoiceElement, error) {
+	h := md5.New()
+	length, _ := io.Copy(h, voice)
+	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)
 	if err != nil {
 		return nil, err
 	}
@@ -62,9 +65,9 @@ func (c *QQClient) UploadGroupPtt(groupCode int64, voice []byte) (*message.Group
 		Ptt: &msg.Ptt{
 			FileType:     proto.Int32(4),
 			SrcUin:       &c.Uin,
-			FileMd5:      h[:],
-			FileName:     proto.String(hex.EncodeToString(h[:]) + ".amr"),
-			FileSize:     proto.Int32(int32(len(voice))),
+			FileMd5:      fh[:],
+			FileName:     proto.String(hex.EncodeToString(fh[:]) + ".amr"),
+			FileSize:     proto.Int32(int32(length)),
 			GroupFileKey: pkt.MsgTryUpPttRsp[0].FileKey,
 			BoolValid:    proto.Bool(true),
 			PbReserve:    []byte{8, 0, 40, 0, 56, 0},
diff --git a/go.mod b/go.mod
index f6ab844c..8f664351 100644
--- a/go.mod
+++ b/go.mod
@@ -3,10 +3,9 @@ module github.com/Mrs4s/MiraiGo
 go 1.15
 
 require (
-	github.com/a8m/syncmap v0.0.0-20200818084611-4bbbd178de97 // indirect
 	github.com/golang/protobuf v1.4.3
 	github.com/pkg/errors v0.9.1
 	github.com/tidwall/gjson v1.6.3
-	golang.org/x/tools v0.0.0-20201218024724-ae774e9781d2 // indirect
+	golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1 // indirect
 	google.golang.org/protobuf v1.25.0
 )
diff --git a/go.sum b/go.sum
index f0d726a6..6099b0bb 100644
--- a/go.sum
+++ b/go.sum
@@ -1,7 +1,5 @@
 cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
 github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
-github.com/a8m/syncmap v0.0.0-20200818084611-4bbbd178de97 h1:QJIAdw5m5tNUy7fjBxgg73+YUs/AkeESeqdJ1L3lN10=
-github.com/a8m/syncmap v0.0.0-20200818084611-4bbbd178de97/go.mod h1:f3iF7/3t9i9hsYF8DPgT0XeIVyNzevhMCKf2445Q6pE=
 github.com/census-instrumentation/opencensus-proto v0.2.1/go.mod h1:f6KPmirojxKA12rnyqOA5BBL4O983OfeGPqjHWSTneU=
 github.com/client9/misspell v0.3.4/go.mod h1:qj6jICC3Q7zFZvVWo7KLAzC3yx5G7kyvSDkc90ppPyw=
 github.com/envoyproxy/go-control-plane v0.9.1-0.20191026205805-5f8ba28d4473/go.mod h1:YTl/9mNaCwkRvm6d1a2C3ymFceY/DCBVvsKhRF0iEA4=
@@ -34,46 +32,27 @@ github.com/tidwall/match v1.0.1 h1:PnKP62LPNxHKTwvHHZZzdOAOCtsJTjo6dZLCwpKm5xc=
 github.com/tidwall/match v1.0.1/go.mod h1:LujAq0jyVjBy028G1WhWfIzbpQfMO8bBZ6Tyb0+pL9E=
 github.com/tidwall/pretty v1.0.2 h1:Z7S3cePv9Jwm1KwS0513MRaoUe3S01WPbLNV40pwWZU=
 github.com/tidwall/pretty v1.0.2/go.mod h1:XNkn88O1ChpSDQmQeStsy+sBenx6DDtFZJxhVysOjyk=
-github.com/yuin/goldmark v1.2.1/go.mod h1:3hX8gzYuyVAZsxl0MRgGTJEmQBFcNTphYh9decYSb74=
 golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
-golang.org/x/crypto v0.0.0-20191011191535-87dc89f01550/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
-golang.org/x/crypto v0.0.0-20200622213623-75b288015ac9/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=
 golang.org/x/exp v0.0.0-20190121172915-509febef88a4/go.mod h1:CJ0aWSM057203Lf6IL+f9T1iT9GByDxfZKAQTCR3kQA=
 golang.org/x/lint v0.0.0-20181026193005-c67002cb31c3/go.mod h1:UVdnD1Gm6xHRNCYTkRU2/jEulfH38KcIWyp/GAMgvoE=
 golang.org/x/lint v0.0.0-20190227174305-5b3e6a55c961/go.mod h1:wehouNa3lNwaWXcvxsM5YxQ5yQlVC4a0KAMCusXpPoU=
 golang.org/x/lint v0.0.0-20190313153728-d0100b6bd8b3/go.mod h1:6SW0HCj/g11FgYtHlgUYUwCkIfeOF89ocIRzGO/8vkc=
-golang.org/x/mod v0.3.0 h1:RM4zey1++hCTbCVQfnWeKs9/IEsaBLA8vTkd0WVtmH4=
-golang.org/x/mod v0.3.0/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
 golang.org/x/net v0.0.0-20180724234803-3673e40ba225/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
 golang.org/x/net v0.0.0-20180826012351-8a410e7b638d/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
 golang.org/x/net v0.0.0-20190213061140-3a22650c66bd/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
 golang.org/x/net v0.0.0-20190311183353-d8887717615a/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
-golang.org/x/net v0.0.0-20190404232315-eb5bcb51f2a3/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
-golang.org/x/net v0.0.0-20190620200207-3b0461eec859/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
-golang.org/x/net v0.0.0-20201021035429-f5854403a974/go.mod h1:sp8m0HH+o8qH0wwXwYZr8TS3Oi6o0r6Gce1SSxlDquU=
 golang.org/x/oauth2 v0.0.0-20180821212333-d2e6202438be/go.mod h1:N/0e6XlmueqKjAGxoOufVs8QHGRruUQn6yWY3a++T0U=
 golang.org/x/sync v0.0.0-20180314180146-1d60e4601c6f/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sync v0.0.0-20181108010431-42b317875d0f/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sync v0.0.0-20190423024810-112230192c58/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
-golang.org/x/sync v0.0.0-20201020160332-67f06af15bc9/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sys v0.0.0-20180830151530-49385e6e1522/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
-golang.org/x/sys v0.0.0-20190412213103-97732733099d/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
-golang.org/x/sys v0.0.0-20200930185726-fdedc70b468f/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
-golang.org/x/text v0.3.3/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
-golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
 golang.org/x/tools v0.0.0-20190114222345-bf090417da8b/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
 golang.org/x/tools v0.0.0-20190226205152-f727befe758c/go.mod h1:9Yl7xja0Znq3iFh3HoIrodX9oNMXvdceNzlUR8zjMvY=
 golang.org/x/tools v0.0.0-20190311212946-11955173bddd/go.mod h1:LCzVGOaR6xXOjkQ3onu1FJEFr0SW1gC7cKk1uF8kGRs=
-golang.org/x/tools v0.0.0-20190501045030-23463209683d/go.mod h1:RgjU9mgBXZiqYHBnxXauZ1Gv1EHHAz9KjViQ78xBX0Q=
 golang.org/x/tools v0.0.0-20190524140312-2c0ae7006135 h1:5Beo0mZN8dRzgrMMkDp0jc8YXQKx9DiJ2k1dkvGsn5A=
 golang.org/x/tools v0.0.0-20190524140312-2c0ae7006135/go.mod h1:RgjU9mgBXZiqYHBnxXauZ1Gv1EHHAz9KjViQ78xBX0Q=
-golang.org/x/tools v0.0.0-20191119224855-298f0cb1881e/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
-golang.org/x/tools v0.0.0-20201218024724-ae774e9781d2 h1:lHDhNNs7asPT3p01mm8EP3B+bNyyVfg0bcYjhJUYgxw=
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