Go语言 序列化反序列化二进制包

包的定义格式是长度，校验码和json内容

package main

import (
	"bytes"
	"encoding/binary"
	"encoding/json"
	"fmt"
	"hash/crc32"
	"io"
	"net"
	"os"
)

type Register struct {
	ACTION int32
	SID    int32
}

type Packet struct {
	length uint32
	crc32  uint32
	info   string
}

func (p Packet) Encode() []byte {
	buf2 := new()
	var length int = len([]byte())
	err := (buf2, , (int32)(length))
	checkError(err)

	err = (buf2, , []byte())
	checkError(err)

	buf := new()
	 = uint32(() + 8)
	err = (buf, , )
	checkError(err)

	p.crc32 = (())
	err = (buf, , p.crc32)
	checkError(err)

	err = (buf, , ())
	checkError(err)
	return ()
}

func (p *Packet) Decode(buff []byte) {
	buf := (buff)
	err := (buf, , &())
	checkError(err)
	()

	err = (buf, , &(p.crc32))
	checkError(err)

	buf2 := (buff[8:])
	crc := (())
	if crc != p.crc32 {
		(" crc not check")
	}

	 = (string)(())
	("%s", )
}

func main() {
	m := Register{20004, 6}
	b, err := (m)
	checkError(err)

	var packet Packet
	 = string(b)
	buf := ()
	(len(buf))

	var msg Packet
	(buf)

	(0)
}

func checkError(err error) {
	if err != nil {
		(, "Fatal error: %s", ())
		(1)
	}
}