mirror of
https://github.com/minio/minio.git
synced 2024-12-27 15:45:55 -05:00
2463ae243a
As a new configuration parameter is added, configuration version is bumped up from 14 to 15. The MySQL target's behaviour is identical to the PostgreSQL: rows are deleted from the MySQL table on delete-object events, and are created/updated on create/over-write events.
1288 lines
31 KiB
Go
1288 lines
31 KiB
Go
// Go MySQL Driver - A MySQL-Driver for Go's database/sql package
|
||
//
|
||
// Copyright 2012 The Go-MySQL-Driver Authors. All rights reserved.
|
||
//
|
||
// This Source Code Form is subject to the terms of the Mozilla Public
|
||
// License, v. 2.0. If a copy of the MPL was not distributed with this file,
|
||
// You can obtain one at http://mozilla.org/MPL/2.0/.
|
||
|
||
package mysql
|
||
|
||
import (
|
||
"bytes"
|
||
"crypto/tls"
|
||
"database/sql/driver"
|
||
"encoding/binary"
|
||
"errors"
|
||
"fmt"
|
||
"io"
|
||
"math"
|
||
"time"
|
||
)
|
||
|
||
// Packets documentation:
|
||
// http://dev.mysql.com/doc/internals/en/client-server-protocol.html
|
||
|
||
// Read packet to buffer 'data'
|
||
func (mc *mysqlConn) readPacket() ([]byte, error) {
|
||
var prevData []byte
|
||
for {
|
||
// read packet header
|
||
data, err := mc.buf.readNext(4)
|
||
if err != nil {
|
||
errLog.Print(err)
|
||
mc.Close()
|
||
return nil, driver.ErrBadConn
|
||
}
|
||
|
||
// packet length [24 bit]
|
||
pktLen := int(uint32(data[0]) | uint32(data[1])<<8 | uint32(data[2])<<16)
|
||
|
||
// check packet sync [8 bit]
|
||
if data[3] != mc.sequence {
|
||
if data[3] > mc.sequence {
|
||
return nil, ErrPktSyncMul
|
||
}
|
||
return nil, ErrPktSync
|
||
}
|
||
mc.sequence++
|
||
|
||
// packets with length 0 terminate a previous packet which is a
|
||
// multiple of (2^24)−1 bytes long
|
||
if pktLen == 0 {
|
||
// there was no previous packet
|
||
if prevData == nil {
|
||
errLog.Print(ErrMalformPkt)
|
||
mc.Close()
|
||
return nil, driver.ErrBadConn
|
||
}
|
||
|
||
return prevData, nil
|
||
}
|
||
|
||
// read packet body [pktLen bytes]
|
||
data, err = mc.buf.readNext(pktLen)
|
||
if err != nil {
|
||
errLog.Print(err)
|
||
mc.Close()
|
||
return nil, driver.ErrBadConn
|
||
}
|
||
|
||
// return data if this was the last packet
|
||
if pktLen < maxPacketSize {
|
||
// zero allocations for non-split packets
|
||
if prevData == nil {
|
||
return data, nil
|
||
}
|
||
|
||
return append(prevData, data...), nil
|
||
}
|
||
|
||
prevData = append(prevData, data...)
|
||
}
|
||
}
|
||
|
||
// Write packet buffer 'data'
|
||
func (mc *mysqlConn) writePacket(data []byte) error {
|
||
pktLen := len(data) - 4
|
||
|
||
if pktLen > mc.maxAllowedPacket {
|
||
return ErrPktTooLarge
|
||
}
|
||
|
||
for {
|
||
var size int
|
||
if pktLen >= maxPacketSize {
|
||
data[0] = 0xff
|
||
data[1] = 0xff
|
||
data[2] = 0xff
|
||
size = maxPacketSize
|
||
} else {
|
||
data[0] = byte(pktLen)
|
||
data[1] = byte(pktLen >> 8)
|
||
data[2] = byte(pktLen >> 16)
|
||
size = pktLen
|
||
}
|
||
data[3] = mc.sequence
|
||
|
||
// Write packet
|
||
if mc.writeTimeout > 0 {
|
||
if err := mc.netConn.SetWriteDeadline(time.Now().Add(mc.writeTimeout)); err != nil {
|
||
return err
|
||
}
|
||
}
|
||
|
||
n, err := mc.netConn.Write(data[:4+size])
|
||
if err == nil && n == 4+size {
|
||
mc.sequence++
|
||
if size != maxPacketSize {
|
||
return nil
|
||
}
|
||
pktLen -= size
|
||
data = data[size:]
|
||
continue
|
||
}
|
||
|
||
// Handle error
|
||
if err == nil { // n != len(data)
|
||
errLog.Print(ErrMalformPkt)
|
||
} else {
|
||
errLog.Print(err)
|
||
}
|
||
return driver.ErrBadConn
|
||
}
|
||
}
|
||
|
||
/******************************************************************************
|
||
* Initialisation Process *
|
||
******************************************************************************/
|
||
|
||
// Handshake Initialization Packet
|
||
// http://dev.mysql.com/doc/internals/en/connection-phase-packets.html#packet-Protocol::Handshake
|
||
func (mc *mysqlConn) readInitPacket() ([]byte, error) {
|
||
data, err := mc.readPacket()
|
||
if err != nil {
|
||
return nil, err
|
||
}
|
||
|
||
if data[0] == iERR {
|
||
return nil, mc.handleErrorPacket(data)
|
||
}
|
||
|
||
// protocol version [1 byte]
|
||
if data[0] < minProtocolVersion {
|
||
return nil, fmt.Errorf(
|
||
"unsupported protocol version %d. Version %d or higher is required",
|
||
data[0],
|
||
minProtocolVersion,
|
||
)
|
||
}
|
||
|
||
// server version [null terminated string]
|
||
// connection id [4 bytes]
|
||
pos := 1 + bytes.IndexByte(data[1:], 0x00) + 1 + 4
|
||
|
||
// first part of the password cipher [8 bytes]
|
||
cipher := data[pos : pos+8]
|
||
|
||
// (filler) always 0x00 [1 byte]
|
||
pos += 8 + 1
|
||
|
||
// capability flags (lower 2 bytes) [2 bytes]
|
||
mc.flags = clientFlag(binary.LittleEndian.Uint16(data[pos : pos+2]))
|
||
if mc.flags&clientProtocol41 == 0 {
|
||
return nil, ErrOldProtocol
|
||
}
|
||
if mc.flags&clientSSL == 0 && mc.cfg.tls != nil {
|
||
return nil, ErrNoTLS
|
||
}
|
||
pos += 2
|
||
|
||
if len(data) > pos {
|
||
// character set [1 byte]
|
||
// status flags [2 bytes]
|
||
// capability flags (upper 2 bytes) [2 bytes]
|
||
// length of auth-plugin-data [1 byte]
|
||
// reserved (all [00]) [10 bytes]
|
||
pos += 1 + 2 + 2 + 1 + 10
|
||
|
||
// second part of the password cipher [mininum 13 bytes],
|
||
// where len=MAX(13, length of auth-plugin-data - 8)
|
||
//
|
||
// The web documentation is ambiguous about the length. However,
|
||
// according to mysql-5.7/sql/auth/sql_authentication.cc line 538,
|
||
// the 13th byte is "\0 byte, terminating the second part of
|
||
// a scramble". So the second part of the password cipher is
|
||
// a NULL terminated string that's at least 13 bytes with the
|
||
// last byte being NULL.
|
||
//
|
||
// The official Python library uses the fixed length 12
|
||
// which seems to work but technically could have a hidden bug.
|
||
cipher = append(cipher, data[pos:pos+12]...)
|
||
|
||
// TODO: Verify string termination
|
||
// EOF if version (>= 5.5.7 and < 5.5.10) or (>= 5.6.0 and < 5.6.2)
|
||
// \NUL otherwise
|
||
//
|
||
//if data[len(data)-1] == 0 {
|
||
// return
|
||
//}
|
||
//return ErrMalformPkt
|
||
|
||
// make a memory safe copy of the cipher slice
|
||
var b [20]byte
|
||
copy(b[:], cipher)
|
||
return b[:], nil
|
||
}
|
||
|
||
// make a memory safe copy of the cipher slice
|
||
var b [8]byte
|
||
copy(b[:], cipher)
|
||
return b[:], nil
|
||
}
|
||
|
||
// Client Authentication Packet
|
||
// http://dev.mysql.com/doc/internals/en/connection-phase-packets.html#packet-Protocol::HandshakeResponse
|
||
func (mc *mysqlConn) writeAuthPacket(cipher []byte) error {
|
||
// Adjust client flags based on server support
|
||
clientFlags := clientProtocol41 |
|
||
clientSecureConn |
|
||
clientLongPassword |
|
||
clientTransactions |
|
||
clientLocalFiles |
|
||
clientPluginAuth |
|
||
clientMultiResults |
|
||
mc.flags&clientLongFlag
|
||
|
||
if mc.cfg.ClientFoundRows {
|
||
clientFlags |= clientFoundRows
|
||
}
|
||
|
||
// To enable TLS / SSL
|
||
if mc.cfg.tls != nil {
|
||
clientFlags |= clientSSL
|
||
}
|
||
|
||
if mc.cfg.MultiStatements {
|
||
clientFlags |= clientMultiStatements
|
||
}
|
||
|
||
// User Password
|
||
scrambleBuff := scramblePassword(cipher, []byte(mc.cfg.Passwd))
|
||
|
||
pktLen := 4 + 4 + 1 + 23 + len(mc.cfg.User) + 1 + 1 + len(scrambleBuff) + 21 + 1
|
||
|
||
// To specify a db name
|
||
if n := len(mc.cfg.DBName); n > 0 {
|
||
clientFlags |= clientConnectWithDB
|
||
pktLen += n + 1
|
||
}
|
||
|
||
// Calculate packet length and get buffer with that size
|
||
data := mc.buf.takeSmallBuffer(pktLen + 4)
|
||
if data == nil {
|
||
// can not take the buffer. Something must be wrong with the connection
|
||
errLog.Print(ErrBusyBuffer)
|
||
return driver.ErrBadConn
|
||
}
|
||
|
||
// ClientFlags [32 bit]
|
||
data[4] = byte(clientFlags)
|
||
data[5] = byte(clientFlags >> 8)
|
||
data[6] = byte(clientFlags >> 16)
|
||
data[7] = byte(clientFlags >> 24)
|
||
|
||
// MaxPacketSize [32 bit] (none)
|
||
data[8] = 0x00
|
||
data[9] = 0x00
|
||
data[10] = 0x00
|
||
data[11] = 0x00
|
||
|
||
// Charset [1 byte]
|
||
var found bool
|
||
data[12], found = collations[mc.cfg.Collation]
|
||
if !found {
|
||
// Note possibility for false negatives:
|
||
// could be triggered although the collation is valid if the
|
||
// collations map does not contain entries the server supports.
|
||
return errors.New("unknown collation")
|
||
}
|
||
|
||
// SSL Connection Request Packet
|
||
// http://dev.mysql.com/doc/internals/en/connection-phase-packets.html#packet-Protocol::SSLRequest
|
||
if mc.cfg.tls != nil {
|
||
// Send TLS / SSL request packet
|
||
if err := mc.writePacket(data[:(4+4+1+23)+4]); err != nil {
|
||
return err
|
||
}
|
||
|
||
// Switch to TLS
|
||
tlsConn := tls.Client(mc.netConn, mc.cfg.tls)
|
||
if err := tlsConn.Handshake(); err != nil {
|
||
return err
|
||
}
|
||
mc.netConn = tlsConn
|
||
mc.buf.nc = tlsConn
|
||
}
|
||
|
||
// Filler [23 bytes] (all 0x00)
|
||
pos := 13
|
||
for ; pos < 13+23; pos++ {
|
||
data[pos] = 0
|
||
}
|
||
|
||
// User [null terminated string]
|
||
if len(mc.cfg.User) > 0 {
|
||
pos += copy(data[pos:], mc.cfg.User)
|
||
}
|
||
data[pos] = 0x00
|
||
pos++
|
||
|
||
// ScrambleBuffer [length encoded integer]
|
||
data[pos] = byte(len(scrambleBuff))
|
||
pos += 1 + copy(data[pos+1:], scrambleBuff)
|
||
|
||
// Databasename [null terminated string]
|
||
if len(mc.cfg.DBName) > 0 {
|
||
pos += copy(data[pos:], mc.cfg.DBName)
|
||
data[pos] = 0x00
|
||
pos++
|
||
}
|
||
|
||
// Assume native client during response
|
||
pos += copy(data[pos:], "mysql_native_password")
|
||
data[pos] = 0x00
|
||
|
||
// Send Auth packet
|
||
return mc.writePacket(data)
|
||
}
|
||
|
||
// Client old authentication packet
|
||
// http://dev.mysql.com/doc/internals/en/connection-phase-packets.html#packet-Protocol::AuthSwitchResponse
|
||
func (mc *mysqlConn) writeOldAuthPacket(cipher []byte) error {
|
||
// User password
|
||
scrambleBuff := scrambleOldPassword(cipher, []byte(mc.cfg.Passwd))
|
||
|
||
// Calculate the packet length and add a tailing 0
|
||
pktLen := len(scrambleBuff) + 1
|
||
data := mc.buf.takeSmallBuffer(4 + pktLen)
|
||
if data == nil {
|
||
// can not take the buffer. Something must be wrong with the connection
|
||
errLog.Print(ErrBusyBuffer)
|
||
return driver.ErrBadConn
|
||
}
|
||
|
||
// Add the scrambled password [null terminated string]
|
||
copy(data[4:], scrambleBuff)
|
||
data[4+pktLen-1] = 0x00
|
||
|
||
return mc.writePacket(data)
|
||
}
|
||
|
||
// Client clear text authentication packet
|
||
// http://dev.mysql.com/doc/internals/en/connection-phase-packets.html#packet-Protocol::AuthSwitchResponse
|
||
func (mc *mysqlConn) writeClearAuthPacket() error {
|
||
// Calculate the packet length and add a tailing 0
|
||
pktLen := len(mc.cfg.Passwd) + 1
|
||
data := mc.buf.takeSmallBuffer(4 + pktLen)
|
||
if data == nil {
|
||
// can not take the buffer. Something must be wrong with the connection
|
||
errLog.Print(ErrBusyBuffer)
|
||
return driver.ErrBadConn
|
||
}
|
||
|
||
// Add the clear password [null terminated string]
|
||
copy(data[4:], mc.cfg.Passwd)
|
||
data[4+pktLen-1] = 0x00
|
||
|
||
return mc.writePacket(data)
|
||
}
|
||
|
||
// Native password authentication method
|
||
// http://dev.mysql.com/doc/internals/en/connection-phase-packets.html#packet-Protocol::AuthSwitchResponse
|
||
func (mc *mysqlConn) writeNativeAuthPacket(cipher []byte) error {
|
||
scrambleBuff := scramblePassword(cipher, []byte(mc.cfg.Passwd))
|
||
|
||
// Calculate the packet length and add a tailing 0
|
||
pktLen := len(scrambleBuff)
|
||
data := mc.buf.takeSmallBuffer(4 + pktLen)
|
||
if data == nil {
|
||
// can not take the buffer. Something must be wrong with the connection
|
||
errLog.Print(ErrBusyBuffer)
|
||
return driver.ErrBadConn
|
||
}
|
||
|
||
// Add the scramble
|
||
copy(data[4:], scrambleBuff)
|
||
|
||
return mc.writePacket(data)
|
||
}
|
||
|
||
/******************************************************************************
|
||
* Command Packets *
|
||
******************************************************************************/
|
||
|
||
func (mc *mysqlConn) writeCommandPacket(command byte) error {
|
||
// Reset Packet Sequence
|
||
mc.sequence = 0
|
||
|
||
data := mc.buf.takeSmallBuffer(4 + 1)
|
||
if data == nil {
|
||
// can not take the buffer. Something must be wrong with the connection
|
||
errLog.Print(ErrBusyBuffer)
|
||
return driver.ErrBadConn
|
||
}
|
||
|
||
// Add command byte
|
||
data[4] = command
|
||
|
||
// Send CMD packet
|
||
return mc.writePacket(data)
|
||
}
|
||
|
||
func (mc *mysqlConn) writeCommandPacketStr(command byte, arg string) error {
|
||
// Reset Packet Sequence
|
||
mc.sequence = 0
|
||
|
||
pktLen := 1 + len(arg)
|
||
data := mc.buf.takeBuffer(pktLen + 4)
|
||
if data == nil {
|
||
// can not take the buffer. Something must be wrong with the connection
|
||
errLog.Print(ErrBusyBuffer)
|
||
return driver.ErrBadConn
|
||
}
|
||
|
||
// Add command byte
|
||
data[4] = command
|
||
|
||
// Add arg
|
||
copy(data[5:], arg)
|
||
|
||
// Send CMD packet
|
||
return mc.writePacket(data)
|
||
}
|
||
|
||
func (mc *mysqlConn) writeCommandPacketUint32(command byte, arg uint32) error {
|
||
// Reset Packet Sequence
|
||
mc.sequence = 0
|
||
|
||
data := mc.buf.takeSmallBuffer(4 + 1 + 4)
|
||
if data == nil {
|
||
// can not take the buffer. Something must be wrong with the connection
|
||
errLog.Print(ErrBusyBuffer)
|
||
return driver.ErrBadConn
|
||
}
|
||
|
||
// Add command byte
|
||
data[4] = command
|
||
|
||
// Add arg [32 bit]
|
||
data[5] = byte(arg)
|
||
data[6] = byte(arg >> 8)
|
||
data[7] = byte(arg >> 16)
|
||
data[8] = byte(arg >> 24)
|
||
|
||
// Send CMD packet
|
||
return mc.writePacket(data)
|
||
}
|
||
|
||
/******************************************************************************
|
||
* Result Packets *
|
||
******************************************************************************/
|
||
|
||
// Returns error if Packet is not an 'Result OK'-Packet
|
||
func (mc *mysqlConn) readResultOK() ([]byte, error) {
|
||
data, err := mc.readPacket()
|
||
if err == nil {
|
||
// packet indicator
|
||
switch data[0] {
|
||
|
||
case iOK:
|
||
return nil, mc.handleOkPacket(data)
|
||
|
||
case iEOF:
|
||
if len(data) > 1 {
|
||
pluginEndIndex := bytes.IndexByte(data, 0x00)
|
||
plugin := string(data[1:pluginEndIndex])
|
||
cipher := data[pluginEndIndex+1 : len(data)-1]
|
||
|
||
if plugin == "mysql_old_password" {
|
||
// using old_passwords
|
||
return cipher, ErrOldPassword
|
||
} else if plugin == "mysql_clear_password" {
|
||
// using clear text password
|
||
return cipher, ErrCleartextPassword
|
||
} else if plugin == "mysql_native_password" {
|
||
// using mysql default authentication method
|
||
return cipher, ErrNativePassword
|
||
} else {
|
||
return cipher, ErrUnknownPlugin
|
||
}
|
||
} else {
|
||
// https://dev.mysql.com/doc/internals/en/connection-phase-packets.html#packet-Protocol::OldAuthSwitchRequest
|
||
return nil, ErrOldPassword
|
||
}
|
||
|
||
default: // Error otherwise
|
||
return nil, mc.handleErrorPacket(data)
|
||
}
|
||
}
|
||
return nil, err
|
||
}
|
||
|
||
// Result Set Header Packet
|
||
// http://dev.mysql.com/doc/internals/en/com-query-response.html#packet-ProtocolText::Resultset
|
||
func (mc *mysqlConn) readResultSetHeaderPacket() (int, error) {
|
||
data, err := mc.readPacket()
|
||
if err == nil {
|
||
switch data[0] {
|
||
|
||
case iOK:
|
||
return 0, mc.handleOkPacket(data)
|
||
|
||
case iERR:
|
||
return 0, mc.handleErrorPacket(data)
|
||
|
||
case iLocalInFile:
|
||
return 0, mc.handleInFileRequest(string(data[1:]))
|
||
}
|
||
|
||
// column count
|
||
num, _, n := readLengthEncodedInteger(data)
|
||
if n-len(data) == 0 {
|
||
return int(num), nil
|
||
}
|
||
|
||
return 0, ErrMalformPkt
|
||
}
|
||
return 0, err
|
||
}
|
||
|
||
// Error Packet
|
||
// http://dev.mysql.com/doc/internals/en/generic-response-packets.html#packet-ERR_Packet
|
||
func (mc *mysqlConn) handleErrorPacket(data []byte) error {
|
||
if data[0] != iERR {
|
||
return ErrMalformPkt
|
||
}
|
||
|
||
// 0xff [1 byte]
|
||
|
||
// Error Number [16 bit uint]
|
||
errno := binary.LittleEndian.Uint16(data[1:3])
|
||
|
||
pos := 3
|
||
|
||
// SQL State [optional: # + 5bytes string]
|
||
if data[3] == 0x23 {
|
||
//sqlstate := string(data[4 : 4+5])
|
||
pos = 9
|
||
}
|
||
|
||
// Error Message [string]
|
||
return &MySQLError{
|
||
Number: errno,
|
||
Message: string(data[pos:]),
|
||
}
|
||
}
|
||
|
||
func readStatus(b []byte) statusFlag {
|
||
return statusFlag(b[0]) | statusFlag(b[1])<<8
|
||
}
|
||
|
||
// Ok Packet
|
||
// http://dev.mysql.com/doc/internals/en/generic-response-packets.html#packet-OK_Packet
|
||
func (mc *mysqlConn) handleOkPacket(data []byte) error {
|
||
var n, m int
|
||
|
||
// 0x00 [1 byte]
|
||
|
||
// Affected rows [Length Coded Binary]
|
||
mc.affectedRows, _, n = readLengthEncodedInteger(data[1:])
|
||
|
||
// Insert id [Length Coded Binary]
|
||
mc.insertId, _, m = readLengthEncodedInteger(data[1+n:])
|
||
|
||
// server_status [2 bytes]
|
||
mc.status = readStatus(data[1+n+m : 1+n+m+2])
|
||
if err := mc.discardResults(); err != nil {
|
||
return err
|
||
}
|
||
|
||
// warning count [2 bytes]
|
||
if !mc.strict {
|
||
return nil
|
||
}
|
||
|
||
pos := 1 + n + m + 2
|
||
if binary.LittleEndian.Uint16(data[pos:pos+2]) > 0 {
|
||
return mc.getWarnings()
|
||
}
|
||
return nil
|
||
}
|
||
|
||
// Read Packets as Field Packets until EOF-Packet or an Error appears
|
||
// http://dev.mysql.com/doc/internals/en/com-query-response.html#packet-Protocol::ColumnDefinition41
|
||
func (mc *mysqlConn) readColumns(count int) ([]mysqlField, error) {
|
||
columns := make([]mysqlField, count)
|
||
|
||
for i := 0; ; i++ {
|
||
data, err := mc.readPacket()
|
||
if err != nil {
|
||
return nil, err
|
||
}
|
||
|
||
// EOF Packet
|
||
if data[0] == iEOF && (len(data) == 5 || len(data) == 1) {
|
||
if i == count {
|
||
return columns, nil
|
||
}
|
||
return nil, fmt.Errorf("column count mismatch n:%d len:%d", count, len(columns))
|
||
}
|
||
|
||
// Catalog
|
||
pos, err := skipLengthEncodedString(data)
|
||
if err != nil {
|
||
return nil, err
|
||
}
|
||
|
||
// Database [len coded string]
|
||
n, err := skipLengthEncodedString(data[pos:])
|
||
if err != nil {
|
||
return nil, err
|
||
}
|
||
pos += n
|
||
|
||
// Table [len coded string]
|
||
if mc.cfg.ColumnsWithAlias {
|
||
tableName, _, n, err := readLengthEncodedString(data[pos:])
|
||
if err != nil {
|
||
return nil, err
|
||
}
|
||
pos += n
|
||
columns[i].tableName = string(tableName)
|
||
} else {
|
||
n, err = skipLengthEncodedString(data[pos:])
|
||
if err != nil {
|
||
return nil, err
|
||
}
|
||
pos += n
|
||
}
|
||
|
||
// Original table [len coded string]
|
||
n, err = skipLengthEncodedString(data[pos:])
|
||
if err != nil {
|
||
return nil, err
|
||
}
|
||
pos += n
|
||
|
||
// Name [len coded string]
|
||
name, _, n, err := readLengthEncodedString(data[pos:])
|
||
if err != nil {
|
||
return nil, err
|
||
}
|
||
columns[i].name = string(name)
|
||
pos += n
|
||
|
||
// Original name [len coded string]
|
||
n, err = skipLengthEncodedString(data[pos:])
|
||
if err != nil {
|
||
return nil, err
|
||
}
|
||
|
||
// Filler [uint8]
|
||
// Charset [charset, collation uint8]
|
||
// Length [uint32]
|
||
pos += n + 1 + 2 + 4
|
||
|
||
// Field type [uint8]
|
||
columns[i].fieldType = data[pos]
|
||
pos++
|
||
|
||
// Flags [uint16]
|
||
columns[i].flags = fieldFlag(binary.LittleEndian.Uint16(data[pos : pos+2]))
|
||
pos += 2
|
||
|
||
// Decimals [uint8]
|
||
columns[i].decimals = data[pos]
|
||
//pos++
|
||
|
||
// Default value [len coded binary]
|
||
//if pos < len(data) {
|
||
// defaultVal, _, err = bytesToLengthCodedBinary(data[pos:])
|
||
//}
|
||
}
|
||
}
|
||
|
||
// Read Packets as Field Packets until EOF-Packet or an Error appears
|
||
// http://dev.mysql.com/doc/internals/en/com-query-response.html#packet-ProtocolText::ResultsetRow
|
||
func (rows *textRows) readRow(dest []driver.Value) error {
|
||
mc := rows.mc
|
||
|
||
data, err := mc.readPacket()
|
||
if err != nil {
|
||
return err
|
||
}
|
||
|
||
// EOF Packet
|
||
if data[0] == iEOF && len(data) == 5 {
|
||
// server_status [2 bytes]
|
||
rows.mc.status = readStatus(data[3:])
|
||
err = rows.mc.discardResults()
|
||
if err == nil {
|
||
err = io.EOF
|
||
} else {
|
||
// connection unusable
|
||
rows.mc.Close()
|
||
}
|
||
rows.mc = nil
|
||
return err
|
||
}
|
||
if data[0] == iERR {
|
||
rows.mc = nil
|
||
return mc.handleErrorPacket(data)
|
||
}
|
||
|
||
// RowSet Packet
|
||
var n int
|
||
var isNull bool
|
||
pos := 0
|
||
|
||
for i := range dest {
|
||
// Read bytes and convert to string
|
||
dest[i], isNull, n, err = readLengthEncodedString(data[pos:])
|
||
pos += n
|
||
if err == nil {
|
||
if !isNull {
|
||
if !mc.parseTime {
|
||
continue
|
||
} else {
|
||
switch rows.columns[i].fieldType {
|
||
case fieldTypeTimestamp, fieldTypeDateTime,
|
||
fieldTypeDate, fieldTypeNewDate:
|
||
dest[i], err = parseDateTime(
|
||
string(dest[i].([]byte)),
|
||
mc.cfg.Loc,
|
||
)
|
||
if err == nil {
|
||
continue
|
||
}
|
||
default:
|
||
continue
|
||
}
|
||
}
|
||
|
||
} else {
|
||
dest[i] = nil
|
||
continue
|
||
}
|
||
}
|
||
return err // err != nil
|
||
}
|
||
|
||
return nil
|
||
}
|
||
|
||
// Reads Packets until EOF-Packet or an Error appears. Returns count of Packets read
|
||
func (mc *mysqlConn) readUntilEOF() error {
|
||
for {
|
||
data, err := mc.readPacket()
|
||
if err != nil {
|
||
return err
|
||
}
|
||
|
||
switch data[0] {
|
||
case iERR:
|
||
return mc.handleErrorPacket(data)
|
||
case iEOF:
|
||
if len(data) == 5 {
|
||
mc.status = readStatus(data[3:])
|
||
}
|
||
return nil
|
||
}
|
||
}
|
||
}
|
||
|
||
/******************************************************************************
|
||
* Prepared Statements *
|
||
******************************************************************************/
|
||
|
||
// Prepare Result Packets
|
||
// http://dev.mysql.com/doc/internals/en/com-stmt-prepare-response.html
|
||
func (stmt *mysqlStmt) readPrepareResultPacket() (uint16, error) {
|
||
data, err := stmt.mc.readPacket()
|
||
if err == nil {
|
||
// packet indicator [1 byte]
|
||
if data[0] != iOK {
|
||
return 0, stmt.mc.handleErrorPacket(data)
|
||
}
|
||
|
||
// statement id [4 bytes]
|
||
stmt.id = binary.LittleEndian.Uint32(data[1:5])
|
||
|
||
// Column count [16 bit uint]
|
||
columnCount := binary.LittleEndian.Uint16(data[5:7])
|
||
|
||
// Param count [16 bit uint]
|
||
stmt.paramCount = int(binary.LittleEndian.Uint16(data[7:9]))
|
||
|
||
// Reserved [8 bit]
|
||
|
||
// Warning count [16 bit uint]
|
||
if !stmt.mc.strict {
|
||
return columnCount, nil
|
||
}
|
||
|
||
// Check for warnings count > 0, only available in MySQL > 4.1
|
||
if len(data) >= 12 && binary.LittleEndian.Uint16(data[10:12]) > 0 {
|
||
return columnCount, stmt.mc.getWarnings()
|
||
}
|
||
return columnCount, nil
|
||
}
|
||
return 0, err
|
||
}
|
||
|
||
// http://dev.mysql.com/doc/internals/en/com-stmt-send-long-data.html
|
||
func (stmt *mysqlStmt) writeCommandLongData(paramID int, arg []byte) error {
|
||
maxLen := stmt.mc.maxAllowedPacket - 1
|
||
pktLen := maxLen
|
||
|
||
// After the header (bytes 0-3) follows before the data:
|
||
// 1 byte command
|
||
// 4 bytes stmtID
|
||
// 2 bytes paramID
|
||
const dataOffset = 1 + 4 + 2
|
||
|
||
// Can not use the write buffer since
|
||
// a) the buffer is too small
|
||
// b) it is in use
|
||
data := make([]byte, 4+1+4+2+len(arg))
|
||
|
||
copy(data[4+dataOffset:], arg)
|
||
|
||
for argLen := len(arg); argLen > 0; argLen -= pktLen - dataOffset {
|
||
if dataOffset+argLen < maxLen {
|
||
pktLen = dataOffset + argLen
|
||
}
|
||
|
||
stmt.mc.sequence = 0
|
||
// Add command byte [1 byte]
|
||
data[4] = comStmtSendLongData
|
||
|
||
// Add stmtID [32 bit]
|
||
data[5] = byte(stmt.id)
|
||
data[6] = byte(stmt.id >> 8)
|
||
data[7] = byte(stmt.id >> 16)
|
||
data[8] = byte(stmt.id >> 24)
|
||
|
||
// Add paramID [16 bit]
|
||
data[9] = byte(paramID)
|
||
data[10] = byte(paramID >> 8)
|
||
|
||
// Send CMD packet
|
||
err := stmt.mc.writePacket(data[:4+pktLen])
|
||
if err == nil {
|
||
data = data[pktLen-dataOffset:]
|
||
continue
|
||
}
|
||
return err
|
||
|
||
}
|
||
|
||
// Reset Packet Sequence
|
||
stmt.mc.sequence = 0
|
||
return nil
|
||
}
|
||
|
||
// Execute Prepared Statement
|
||
// http://dev.mysql.com/doc/internals/en/com-stmt-execute.html
|
||
func (stmt *mysqlStmt) writeExecutePacket(args []driver.Value) error {
|
||
if len(args) != stmt.paramCount {
|
||
return fmt.Errorf(
|
||
"argument count mismatch (got: %d; has: %d)",
|
||
len(args),
|
||
stmt.paramCount,
|
||
)
|
||
}
|
||
|
||
const minPktLen = 4 + 1 + 4 + 1 + 4
|
||
mc := stmt.mc
|
||
|
||
// Reset packet-sequence
|
||
mc.sequence = 0
|
||
|
||
var data []byte
|
||
|
||
if len(args) == 0 {
|
||
data = mc.buf.takeBuffer(minPktLen)
|
||
} else {
|
||
data = mc.buf.takeCompleteBuffer()
|
||
}
|
||
if data == nil {
|
||
// can not take the buffer. Something must be wrong with the connection
|
||
errLog.Print(ErrBusyBuffer)
|
||
return driver.ErrBadConn
|
||
}
|
||
|
||
// command [1 byte]
|
||
data[4] = comStmtExecute
|
||
|
||
// statement_id [4 bytes]
|
||
data[5] = byte(stmt.id)
|
||
data[6] = byte(stmt.id >> 8)
|
||
data[7] = byte(stmt.id >> 16)
|
||
data[8] = byte(stmt.id >> 24)
|
||
|
||
// flags (0: CURSOR_TYPE_NO_CURSOR) [1 byte]
|
||
data[9] = 0x00
|
||
|
||
// iteration_count (uint32(1)) [4 bytes]
|
||
data[10] = 0x01
|
||
data[11] = 0x00
|
||
data[12] = 0x00
|
||
data[13] = 0x00
|
||
|
||
if len(args) > 0 {
|
||
pos := minPktLen
|
||
|
||
var nullMask []byte
|
||
if maskLen, typesLen := (len(args)+7)/8, 1+2*len(args); pos+maskLen+typesLen >= len(data) {
|
||
// buffer has to be extended but we don't know by how much so
|
||
// we depend on append after all data with known sizes fit.
|
||
// We stop at that because we deal with a lot of columns here
|
||
// which makes the required allocation size hard to guess.
|
||
tmp := make([]byte, pos+maskLen+typesLen)
|
||
copy(tmp[:pos], data[:pos])
|
||
data = tmp
|
||
nullMask = data[pos : pos+maskLen]
|
||
pos += maskLen
|
||
} else {
|
||
nullMask = data[pos : pos+maskLen]
|
||
for i := 0; i < maskLen; i++ {
|
||
nullMask[i] = 0
|
||
}
|
||
pos += maskLen
|
||
}
|
||
|
||
// newParameterBoundFlag 1 [1 byte]
|
||
data[pos] = 0x01
|
||
pos++
|
||
|
||
// type of each parameter [len(args)*2 bytes]
|
||
paramTypes := data[pos:]
|
||
pos += len(args) * 2
|
||
|
||
// value of each parameter [n bytes]
|
||
paramValues := data[pos:pos]
|
||
valuesCap := cap(paramValues)
|
||
|
||
for i, arg := range args {
|
||
// build NULL-bitmap
|
||
if arg == nil {
|
||
nullMask[i/8] |= 1 << (uint(i) & 7)
|
||
paramTypes[i+i] = fieldTypeNULL
|
||
paramTypes[i+i+1] = 0x00
|
||
continue
|
||
}
|
||
|
||
// cache types and values
|
||
switch v := arg.(type) {
|
||
case int64:
|
||
paramTypes[i+i] = fieldTypeLongLong
|
||
paramTypes[i+i+1] = 0x00
|
||
|
||
if cap(paramValues)-len(paramValues)-8 >= 0 {
|
||
paramValues = paramValues[:len(paramValues)+8]
|
||
binary.LittleEndian.PutUint64(
|
||
paramValues[len(paramValues)-8:],
|
||
uint64(v),
|
||
)
|
||
} else {
|
||
paramValues = append(paramValues,
|
||
uint64ToBytes(uint64(v))...,
|
||
)
|
||
}
|
||
|
||
case float64:
|
||
paramTypes[i+i] = fieldTypeDouble
|
||
paramTypes[i+i+1] = 0x00
|
||
|
||
if cap(paramValues)-len(paramValues)-8 >= 0 {
|
||
paramValues = paramValues[:len(paramValues)+8]
|
||
binary.LittleEndian.PutUint64(
|
||
paramValues[len(paramValues)-8:],
|
||
math.Float64bits(v),
|
||
)
|
||
} else {
|
||
paramValues = append(paramValues,
|
||
uint64ToBytes(math.Float64bits(v))...,
|
||
)
|
||
}
|
||
|
||
case bool:
|
||
paramTypes[i+i] = fieldTypeTiny
|
||
paramTypes[i+i+1] = 0x00
|
||
|
||
if v {
|
||
paramValues = append(paramValues, 0x01)
|
||
} else {
|
||
paramValues = append(paramValues, 0x00)
|
||
}
|
||
|
||
case []byte:
|
||
// Common case (non-nil value) first
|
||
if v != nil {
|
||
paramTypes[i+i] = fieldTypeString
|
||
paramTypes[i+i+1] = 0x00
|
||
|
||
if len(v) < mc.maxAllowedPacket-pos-len(paramValues)-(len(args)-(i+1))*64 {
|
||
paramValues = appendLengthEncodedInteger(paramValues,
|
||
uint64(len(v)),
|
||
)
|
||
paramValues = append(paramValues, v...)
|
||
} else {
|
||
if err := stmt.writeCommandLongData(i, v); err != nil {
|
||
return err
|
||
}
|
||
}
|
||
continue
|
||
}
|
||
|
||
// Handle []byte(nil) as a NULL value
|
||
nullMask[i/8] |= 1 << (uint(i) & 7)
|
||
paramTypes[i+i] = fieldTypeNULL
|
||
paramTypes[i+i+1] = 0x00
|
||
|
||
case string:
|
||
paramTypes[i+i] = fieldTypeString
|
||
paramTypes[i+i+1] = 0x00
|
||
|
||
if len(v) < mc.maxAllowedPacket-pos-len(paramValues)-(len(args)-(i+1))*64 {
|
||
paramValues = appendLengthEncodedInteger(paramValues,
|
||
uint64(len(v)),
|
||
)
|
||
paramValues = append(paramValues, v...)
|
||
} else {
|
||
if err := stmt.writeCommandLongData(i, []byte(v)); err != nil {
|
||
return err
|
||
}
|
||
}
|
||
|
||
case time.Time:
|
||
paramTypes[i+i] = fieldTypeString
|
||
paramTypes[i+i+1] = 0x00
|
||
|
||
var val []byte
|
||
if v.IsZero() {
|
||
val = []byte("0000-00-00")
|
||
} else {
|
||
val = []byte(v.In(mc.cfg.Loc).Format(timeFormat))
|
||
}
|
||
|
||
paramValues = appendLengthEncodedInteger(paramValues,
|
||
uint64(len(val)),
|
||
)
|
||
paramValues = append(paramValues, val...)
|
||
|
||
default:
|
||
return fmt.Errorf("can not convert type: %T", arg)
|
||
}
|
||
}
|
||
|
||
// Check if param values exceeded the available buffer
|
||
// In that case we must build the data packet with the new values buffer
|
||
if valuesCap != cap(paramValues) {
|
||
data = append(data[:pos], paramValues...)
|
||
mc.buf.buf = data
|
||
}
|
||
|
||
pos += len(paramValues)
|
||
data = data[:pos]
|
||
}
|
||
|
||
return mc.writePacket(data)
|
||
}
|
||
|
||
func (mc *mysqlConn) discardResults() error {
|
||
for mc.status&statusMoreResultsExists != 0 {
|
||
resLen, err := mc.readResultSetHeaderPacket()
|
||
if err != nil {
|
||
return err
|
||
}
|
||
if resLen > 0 {
|
||
// columns
|
||
if err := mc.readUntilEOF(); err != nil {
|
||
return err
|
||
}
|
||
// rows
|
||
if err := mc.readUntilEOF(); err != nil {
|
||
return err
|
||
}
|
||
} else {
|
||
mc.status &^= statusMoreResultsExists
|
||
}
|
||
}
|
||
return nil
|
||
}
|
||
|
||
// http://dev.mysql.com/doc/internals/en/binary-protocol-resultset-row.html
|
||
func (rows *binaryRows) readRow(dest []driver.Value) error {
|
||
data, err := rows.mc.readPacket()
|
||
if err != nil {
|
||
return err
|
||
}
|
||
|
||
// packet indicator [1 byte]
|
||
if data[0] != iOK {
|
||
// EOF Packet
|
||
if data[0] == iEOF && len(data) == 5 {
|
||
rows.mc.status = readStatus(data[3:])
|
||
err = rows.mc.discardResults()
|
||
if err == nil {
|
||
err = io.EOF
|
||
} else {
|
||
// connection unusable
|
||
rows.mc.Close()
|
||
}
|
||
rows.mc = nil
|
||
return err
|
||
}
|
||
rows.mc = nil
|
||
|
||
// Error otherwise
|
||
return rows.mc.handleErrorPacket(data)
|
||
}
|
||
|
||
// NULL-bitmap, [(column-count + 7 + 2) / 8 bytes]
|
||
pos := 1 + (len(dest)+7+2)>>3
|
||
nullMask := data[1:pos]
|
||
|
||
for i := range dest {
|
||
// Field is NULL
|
||
// (byte >> bit-pos) % 2 == 1
|
||
if ((nullMask[(i+2)>>3] >> uint((i+2)&7)) & 1) == 1 {
|
||
dest[i] = nil
|
||
continue
|
||
}
|
||
|
||
// Convert to byte-coded string
|
||
switch rows.columns[i].fieldType {
|
||
case fieldTypeNULL:
|
||
dest[i] = nil
|
||
continue
|
||
|
||
// Numeric Types
|
||
case fieldTypeTiny:
|
||
if rows.columns[i].flags&flagUnsigned != 0 {
|
||
dest[i] = int64(data[pos])
|
||
} else {
|
||
dest[i] = int64(int8(data[pos]))
|
||
}
|
||
pos++
|
||
continue
|
||
|
||
case fieldTypeShort, fieldTypeYear:
|
||
if rows.columns[i].flags&flagUnsigned != 0 {
|
||
dest[i] = int64(binary.LittleEndian.Uint16(data[pos : pos+2]))
|
||
} else {
|
||
dest[i] = int64(int16(binary.LittleEndian.Uint16(data[pos : pos+2])))
|
||
}
|
||
pos += 2
|
||
continue
|
||
|
||
case fieldTypeInt24, fieldTypeLong:
|
||
if rows.columns[i].flags&flagUnsigned != 0 {
|
||
dest[i] = int64(binary.LittleEndian.Uint32(data[pos : pos+4]))
|
||
} else {
|
||
dest[i] = int64(int32(binary.LittleEndian.Uint32(data[pos : pos+4])))
|
||
}
|
||
pos += 4
|
||
continue
|
||
|
||
case fieldTypeLongLong:
|
||
if rows.columns[i].flags&flagUnsigned != 0 {
|
||
val := binary.LittleEndian.Uint64(data[pos : pos+8])
|
||
if val > math.MaxInt64 {
|
||
dest[i] = uint64ToString(val)
|
||
} else {
|
||
dest[i] = int64(val)
|
||
}
|
||
} else {
|
||
dest[i] = int64(binary.LittleEndian.Uint64(data[pos : pos+8]))
|
||
}
|
||
pos += 8
|
||
continue
|
||
|
||
case fieldTypeFloat:
|
||
dest[i] = float32(math.Float32frombits(binary.LittleEndian.Uint32(data[pos : pos+4])))
|
||
pos += 4
|
||
continue
|
||
|
||
case fieldTypeDouble:
|
||
dest[i] = math.Float64frombits(binary.LittleEndian.Uint64(data[pos : pos+8]))
|
||
pos += 8
|
||
continue
|
||
|
||
// Length coded Binary Strings
|
||
case fieldTypeDecimal, fieldTypeNewDecimal, fieldTypeVarChar,
|
||
fieldTypeBit, fieldTypeEnum, fieldTypeSet, fieldTypeTinyBLOB,
|
||
fieldTypeMediumBLOB, fieldTypeLongBLOB, fieldTypeBLOB,
|
||
fieldTypeVarString, fieldTypeString, fieldTypeGeometry, fieldTypeJSON:
|
||
var isNull bool
|
||
var n int
|
||
dest[i], isNull, n, err = readLengthEncodedString(data[pos:])
|
||
pos += n
|
||
if err == nil {
|
||
if !isNull {
|
||
continue
|
||
} else {
|
||
dest[i] = nil
|
||
continue
|
||
}
|
||
}
|
||
return err
|
||
|
||
case
|
||
fieldTypeDate, fieldTypeNewDate, // Date YYYY-MM-DD
|
||
fieldTypeTime, // Time [-][H]HH:MM:SS[.fractal]
|
||
fieldTypeTimestamp, fieldTypeDateTime: // Timestamp YYYY-MM-DD HH:MM:SS[.fractal]
|
||
|
||
num, isNull, n := readLengthEncodedInteger(data[pos:])
|
||
pos += n
|
||
|
||
switch {
|
||
case isNull:
|
||
dest[i] = nil
|
||
continue
|
||
case rows.columns[i].fieldType == fieldTypeTime:
|
||
// database/sql does not support an equivalent to TIME, return a string
|
||
var dstlen uint8
|
||
switch decimals := rows.columns[i].decimals; decimals {
|
||
case 0x00, 0x1f:
|
||
dstlen = 8
|
||
case 1, 2, 3, 4, 5, 6:
|
||
dstlen = 8 + 1 + decimals
|
||
default:
|
||
return fmt.Errorf(
|
||
"protocol error, illegal decimals value %d",
|
||
rows.columns[i].decimals,
|
||
)
|
||
}
|
||
dest[i], err = formatBinaryDateTime(data[pos:pos+int(num)], dstlen, true)
|
||
case rows.mc.parseTime:
|
||
dest[i], err = parseBinaryDateTime(num, data[pos:], rows.mc.cfg.Loc)
|
||
default:
|
||
var dstlen uint8
|
||
if rows.columns[i].fieldType == fieldTypeDate {
|
||
dstlen = 10
|
||
} else {
|
||
switch decimals := rows.columns[i].decimals; decimals {
|
||
case 0x00, 0x1f:
|
||
dstlen = 19
|
||
case 1, 2, 3, 4, 5, 6:
|
||
dstlen = 19 + 1 + decimals
|
||
default:
|
||
return fmt.Errorf(
|
||
"protocol error, illegal decimals value %d",
|
||
rows.columns[i].decimals,
|
||
)
|
||
}
|
||
}
|
||
dest[i], err = formatBinaryDateTime(data[pos:pos+int(num)], dstlen, false)
|
||
}
|
||
|
||
if err == nil {
|
||
pos += int(num)
|
||
continue
|
||
} else {
|
||
return err
|
||
}
|
||
|
||
// Please report if this happens!
|
||
default:
|
||
return fmt.Errorf("unknown field type %d", rows.columns[i].fieldType)
|
||
}
|
||
}
|
||
|
||
return nil
|
||
}
|