从零开始做mysql-proxy 之 print - sql

freedbg

发布 2018-06-02 14:06

直接贴个图代码自己拉

`package main

import (
“bytes”
“compress/flate”
// “encoding/binary”
“compress/zlib”
//“encoding/hex”
“flag”
“fmt”
“github.com/axgle/mahonia”
“io”
“io/ioutil”
“net”
“os”
“os/signal”
“reflect”
“strconv”
“syscall”
“unsafe”
)

/**

tcp 启动链接三次握手关闭四次
慢启动 + 拥塞窗口
门限控制 < 拥塞窗口进入拥塞避免
在发送数据后检测 ack 确认超时或者收到重复ack 确认操作门限值和拥塞窗口值来限流
接收方使用通告窗口告知发送可接受多少字节
*
发送方：滑动窗口协议
*/
var MaxPayloadLen int = 1<<24 - 1

//结构体内嵌接口
type Man struct {
iTest
name string
}

type iTest interface {
hello()
}

type Em struct {
good string
}

func (em *Em) hello() {
fmt.Println(em.good)
}

func (man *Man) hello() {
fmt.Println(man.name)
}

var workerChan = make(chan net.TCPConn, 10000)
var graddr string

func main() {

// vman := Man{
//     &Em{
//         good: "goodman",
//     },
//     "helloman"}
// vman.hello()
// fmt.Println(vman)
//gb := make([]byte, 15000000)
nf := flag.String("name", "server", "input server or client")
graddr = flag.String("rip", "192.168.1.19:3306", "ip:port")
lsaddr := flag.String("lip", "0.0.0.0:9696", "local ip")
flag.Parse()

fmt.Println(*nf)
fmt.Println("本地监听：", *lsaddr)
fmt.Println("本程序默认链接是192.168.1.19：3306 的 MYSQL")
fmt.Println("请将程序的MYSQL链接地址指向到本机：", *lsaddr)
go signalHandler()

laddr, aerr := net.ResolveTCPAddr("tcp", *lsaddr)
if aerr != nil {
    os.Exit(1)
}
listen, lerr := net.ListenTCP("tcp", laddr)
defer listen.Close()
if lerr != nil {
    os.Exit(2)
}

for {
    tcpConn, cerr := listen.AcceptTCP()
    fmt.Println("accept one client")
    if cerr == nil {
        go clientRequest(tcpConn) //plan 1
    }
}

var wait string
fmt.Scanln(&wait)

}

func signalHandler() {
ch := make(chan os.Signal)
signal.Notify(ch, syscall.SIGTERM)
for {
switch <-ch {
case syscall.SIGTERM:
//ftpServer.Stop()
os.Exit(100)
break
}
}
}

var debug bool = false

/**

工作协程
/
func clientRequest(conn net.TCPConn) {
// //接受偏移
// var recvpos int

// //解析偏移
// var pos int

// //写入偏移
// var writepos int
var recvpos = 0
var pos = 0
var writepos = 0
var num = 0
raddr, rerr := net.ResolveTCPAddr(“tcp”, *graddr)
if rerr != nil {

 fmt.Println(rerr)
 return
 //os.Exit(3)

}
mysqltcpConn, dterr := net.DialTCP(“tcp”, nil, raddr)

if dterr != nil {

 fmt.Println(dterr)
 return

}
go mysqlReturn(conn, mysqltcpConn)

var b [15000000]byte
var com = false
for {

 num++
 rlen, err := conn.Read(b[recvpos:])
 if debug {

     fmt.Println("recv length:", rlen)
 }
 if err != nil {
     fmt.Println("mysql client退出")
     fmt.Println(err)
     return
 } else {
     //增加接受偏移
     recvpos += rlen
 }

 packContentlength := int(uint32(b[pos+0]) | uint32(b[pos+1])<<8 | uint32(b[pos+2])<<16)
 // if packContentlength < 1 {
 //     fmt.Println("不可用的头部")
 // }

 packnum := uint8(b[pos+3])
 pos += 4

 packcommd := uint8(b[pos+4])
 if debug {
     fmt.Println("packContentLength:", packContentlength, "packnum:", packnum)
 }
 if packnum == 0 && packcommd == 0 {
     pos += 3
     packContentlength = int(uint32(b[pos+0]) | uint32(b[pos+1])<<8 | uint32(b[pos+2])<<16)
     packnum = uint8(b[pos+3])
     packcommd = uint8(b[pos+4])
     pos += 4
     if debug {
         fmt.Println("packContentLength:", packContentlength, "packnum:", packnum, "command", packcommd)
     }
 } else {

     if rlen-7 == packContentlength && uint8(b[pos+3+1]) == 156 && uint8(b[pos+3]) == 120 {
         com = true
         if debug {
             fmt.Println(uint8(b[pos+3]))
             fmt.Println(uint8(b[pos+3+1]))
             fmt.Println("find need compress")
         }
         dedata := DoZlibUnCompress(b[pos+3 : pos+rlen-3])
         fmt.Println("------------")
         fmt.Println("[", num, "]", string(dedata[1:]))

     }
 }
 //readpos
 //-----------recvpos
 //----writepost
 //
 //
 //pos来增加
 // if 4+packContentlength <= rlen {

 // }

 if packContentlength > 0 && pos+packContentlength <= recvpos {

     if com == false {
         fmt.Println("------------")
         fmt.Println("[", num, "]", string(b[pos+1:pos+packContentlength]))

     }
     //+1 去掉 命令位

     pos += packContentlength
 } else {
     pos -= 4
 }
 if err != nil {
     fmt.Println(err)
 }

 mysqltcpConn.Write(b[writepos:recvpos])
 writepos = recvpos
 pos = recvpos
 com = false
 //fmt.Println(hex.EncodeToString(b[0:recvpos]))

}

}
func btox(b string) string {
base, _ := strconv.ParseInt(b, 2, 10)
return strconv.FormatInt(base, 16)
}

const (
COM_SLEEP byte = iota
COM_QUIT
COM_INIT_DB
COM_QUERY
COM_FIELD_LIST
COM_CREATE_DB
COM_DROP_DB
COM_REFRESH
COM_SHUTDOWN
COM_STATISTICS
COM_PROCESS_INFO
COM_CONNECT
COM_PROCESS_KILL
COM_DEBUG
COM_PING
COM_TIME
COM_DELAYED_INSERT
COM_CHANGE_USER
COM_BINLOG_DUMP
COM_TABLE_DUMP
COM_CONNECT_OUT
COM_REGISTER_SLAVE
COM_STMT_PREPARE
COM_STMT_EXECUTE
COM_STMT_SEND_LONG_DATA
COM_STMT_CLOSE
COM_STMT_RESET
COM_SET_OPTION
COM_STMT_FETCH
COM_DAEMON
COM_BINLOG_DUMP_GTID
COM_RESET_CONNECTION
)

func String(b []byte) (s string) {
pbytes := (reflect.SliceHeader)(unsafe.Pointer(&b))
pstring := (reflect.StringHeader)(unsafe.Pointer(&s))
pstring.Data = pbytes.Data
pstring.Len = pbytes.Len
return
}

func ConvertToString(src string, srcCode string, tagCode string) string {
srcCoder := mahonia.NewDecoder(srcCode)
srcResult := srcCoder.ConvertString(src)
tagCoder := mahonia.NewDecoder(tagCode)
, cdata, := tagCoder.Translate([]byte(srcResult), true)
result := string(cdata)
return result
}

func mysqlReturn(conn net.TCPConn, mysqlconn net.TCPConn) {
var b [1500]byte
for {
len, err := mysqlconn.Read(b[0:])

    if err != nil {
        //fmt.Println(err)
    }
    conn.Write(b[0:len])
    //conn.Write([]byte("HELLO WORLD"))
}

}

func FlateDecode(input []byte) (result []byte, err error) {
fmt.Println(input[0:])
result, err = ioutil.ReadAll(flate.NewReader(bytes.NewReader(input)))
fmt.Println(result[0:])
return result, err
}

func DoZlibUnCompress(compressSrc []byte) []byte {
b := bytes.NewReader(compressSrc)
var out bytes.Buffer
r, _ := zlib.NewReader(b)
io.Copy(&out, r)
return out.Bytes()
}

// int ZEXPORT uncompress (dest, destLen, source, sourceLen)
// Bytef dest;
// uLongf destLen;
// const Bytef *source;
// uLong sourceLen;
// {
// z_stream stream;
// int err;

// stream.next_in = (Bytef)source;
// stream.avail_in = (uInt)sourceLen;
// / Check for source > 64K on 16-bit machine: */
// if ((uLong)stream.avail_in != sourceLen) return Z_BUF_ERROR;

// stream.next_out = dest;
// stream.avail_out = (uInt)destLen;
// if ((uLong)stream.avail_out != destLen) return Z_BUF_ERROR;

// stream.zalloc = (alloc_func)0;
// stream.zfree = (free_func)0;

// err = inflateInit(&stream);
// if (err != Z_OK) return err;

// err = inflate(&stream, Z_FINISH);
// if (err != Z_STREAM_END) {
// inflateEnd(&stream);
// if (err == Z_NEED_DICT || (err == Z_BUF_ERROR && stream.avail_in == 0))
// return Z_DATA_ERROR;
// return err;
// }
// *destLen = stream.total_out;

// err = inflateEnd(&stream);
// return err;
// }
`

从零开始做mysql-proxy 之 print - sql

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