golang 处理TCP粘包问题

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func Encode(data []byte) []byte {     buf := bytes.NewBuffer(nil)     binary.Write(buf, binary.BigEndian, uint32(len(data)))     binary.Write(buf, binary.BigEndian, data)     return buf.Bytes() }   func Decode(data []byte) ([]byte, error) {     reader := bufio.NewReader(bytes.NewBuffer(data))     peek, err := reader.Peek(4)     if err != nil {         return nil, err     }     buffer := bytes.NewBuffer(peek)     var length uint32     err = binary.Read(buffer, binary.LittleEndian, &length)     if err != nil {         return nil, err     }     if uint32(reader.Buffered()) < length+4 {         return nil, errors.New("长度不足")     }     data = make([]byte, length+4)     _, err = reader.Read(data)     if err != nil {         return nil, err     }     return data[4:], nil }