fix issue of forward message sending.

client/client.go

@@ -282,7 +282,6 @@ func (c *QQClient) GetForwardMessage(resId string) *message.ForwardMessage {
 	return ret
 }
 
-// 目前手机端无法解析，可能是加密的问题，等待修复
 func (c *QQClient) SendForwardMessage(groupCode int64, m *message.ForwardMessage) *message.GroupMessage {
 	if len(m.Nodes) >= 200 {
 		return nil

client/decoders.go

@@ -717,7 +717,7 @@ func decodeMultiApplyDownResponse(c *QQClient, _ uint16, payload []byte) (interf
 	i1 := r.ReadInt32()
 	i2 := r.ReadInt32()
 	if i1 > 0 {
-		r.ReadBytes(int(i1)) // highway head
+		r.ReadBytes(int(i1)) // im msg head
 	}
 	data := tea.Decrypt(r.ReadBytes(int(i2)))
 	lb := longmsg.LongRspBody{}

message/message.go

@@ -378,7 +378,13 @@ func (forMsg *ForwardMessage) CalculateValidationData(seq, random int32, groupCo
 			},
 		})
 	}
-	trans := &msg.PbMultiMsgTransmit{Msg: msgs}
+	buf, _ := proto.Marshal(&msg.PbMultiMsgNew{Msg: msgs})
+	trans := &msg.PbMultiMsgTransmit{Msg: msgs, PbItemList: []*msg.PbMultiMsgItem{
+		{
+			FileName: "MultiMsg",
+			Buffer:   buf,
+		},
+	}}
 	b, _ := proto.Marshal(trans)
 	data := binary.GZipCompress(b)
 	hash := md5.Sum(data)