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JSON tests

This commit is contained in:
Gregory Eremin 2018-11-08 23:29:09 +01:00
parent ff91136fab
commit 8a22495a0c
6 changed files with 528 additions and 12 deletions

View File

@ -222,8 +222,12 @@ func (e *RowsEvent) decodeValue(buf *tools.Buffer, ct mysql.ColumnType, meta uin
return readString(buf, int(meta))
// Blobs
case mysql.ColumnTypeBlob, mysql.ColumnTypeGeometry, mysql.ColumnTypeJSON:
case mysql.ColumnTypeBlob, mysql.ColumnTypeGeometry:
return buf.ReadStringVarEnc(int(meta))
case mysql.ColumnTypeJSON:
jdata := buf.ReadStringVarEnc(int(meta))
rawj, _ := mysql.DecodeJSON(jdata)
return rawj
case mysql.ColumnTypeTinyblob:
return buf.ReadStringVarEnc(1)
case mysql.ColumnTypeMediumblob:

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@ -2,6 +2,7 @@ package mysql
import (
"encoding/binary"
"math"
)
// Protocol::FixedLengthInteger
@ -162,6 +163,10 @@ func encodeVarLen64(data []byte, v uint64, s int) {
// DecodeVarLen64 decodes a number of given size in bytes using Little Endian.
func DecodeVarLen64(data []byte, s int) uint64 {
if s > len(data) {
return 0
}
v := uint64(data[0])
for i := 1; i < s; i++ {
v |= uint64(data[i]) << uint(i*8)
@ -243,6 +248,16 @@ func DecodeStringEOF(data []byte) []byte {
return s
}
// DecodeFloat32 decodes a float value into a float32.
func DecodeFloat32(data []byte) float32 {
return math.Float32frombits(DecodeUint32(data))
}
// DecodeFloat64 decodes a double value into a float64.
func DecodeFloat64(data []byte) float64 {
return math.Float64frombits(DecodeUint64(data))
}
// DecodeBit decodes a bit into not less than 8 bytes.
func DecodeBit(data []byte, nbits int, length int) uint64 {
if nbits > 1 {

473
mysql/json.go Normal file
View File

@ -0,0 +1,473 @@
package mysql
import (
"encoding/json"
"fmt"
"math"
"github.com/juju/errors"
)
const (
jsonSmallObject byte = iota
jsonLargeObject
jsonSmallArray
jsonLargeArray
jsonLiteral // Literal (true/false/null)
jsonInt16
jsonUint16
jsonInt32
jsonUint32
jsonInt64
jsonUint64
jsonFloat64
jsonString
jsonOpaque byte = 0x0f // Custom data (any MySQL data type)
jsonNull byte = 0x00
jsonTrue byte = 0x01
jsonFalse byte = 0x02
jsonbSmallOffsetSize = 2
jsonbLargeOffsetSize = 4
jsonbKeyEntrySizeSmall = 2 + jsonbSmallOffsetSize
jsonbKeyEntrySizeLarge = 2 + jsonbLargeOffsetSize
jsonbValueEntrySizeSmall = 1 + jsonbSmallOffsetSize
jsonbValueEntrySizeLarge = 1 + jsonbLargeOffsetSize
)
// DecodeJSON decodes JSON into raw bytes.
// Implementation borrowed from https://github.com/siddontang/go-mysql/
func DecodeJSON(data []byte) ([]byte, error) {
d := jsonBinaryDecoder{useDecimal: false}
if d.isDataShort(data, 1) {
return nil, d.err
}
v := d.decodeValue(data[0], data[1:])
if d.err != nil {
return nil, d.err
}
return json.Marshal(v)
}
func jsonbGetOffsetSize(isSmall bool) int {
if isSmall {
return jsonbSmallOffsetSize
}
return jsonbLargeOffsetSize
}
func jsonbGetKeyEntrySize(isSmall bool) int {
if isSmall {
return jsonbKeyEntrySizeSmall
}
return jsonbKeyEntrySizeLarge
}
func jsonbGetValueEntrySize(isSmall bool) int {
if isSmall {
return jsonbValueEntrySizeSmall
}
return jsonbValueEntrySizeLarge
}
type jsonBinaryDecoder struct {
useDecimal bool
err error
}
func (d *jsonBinaryDecoder) decodeValue(tp byte, data []byte) interface{} {
if d.err != nil {
return nil
}
switch tp {
case jsonSmallObject:
return d.decodeObjectOrArray(data, true, true)
case jsonLargeObject:
return d.decodeObjectOrArray(data, false, true)
case jsonSmallArray:
return d.decodeObjectOrArray(data, true, false)
case jsonLargeArray:
return d.decodeObjectOrArray(data, false, false)
case jsonLiteral:
return d.decodeLiteral(data)
case jsonInt16:
return d.decodeInt16(data)
case jsonUint16:
return d.decodeUint16(data)
case jsonInt32:
return d.decodeInt32(data)
case jsonUint32:
return d.decodeUint32(data)
case jsonInt64:
return d.decodeInt64(data)
case jsonUint64:
return d.decodeUint64(data)
case jsonFloat64:
return d.decodeDouble(data)
case jsonString:
return d.decodeString(data)
case jsonOpaque:
return d.decodeOpaque(data)
default:
d.err = errors.Errorf("invalid json type %d", tp)
}
return nil
}
func (d *jsonBinaryDecoder) decodeObjectOrArray(data []byte, isSmall bool, isObject bool) interface{} {
offsetSize := jsonbGetOffsetSize(isSmall)
if d.isDataShort(data, 2*offsetSize) {
return nil
}
count := d.decodeCount(data, isSmall)
size := d.decodeCount(data[offsetSize:], isSmall)
if d.isDataShort(data, int(size)) {
return nil
}
keyEntrySize := jsonbGetKeyEntrySize(isSmall)
valueEntrySize := jsonbGetValueEntrySize(isSmall)
headerSize := 2*offsetSize + count*valueEntrySize
if isObject {
headerSize += count * keyEntrySize
}
if headerSize > size {
d.err = errors.Errorf("header size %d > size %d", headerSize, size)
return nil
}
var keys []string
if isObject {
keys = make([]string, count)
for i := 0; i < count; i++ {
// decode key
entryOffset := 2*offsetSize + keyEntrySize*i
keyOffset := d.decodeCount(data[entryOffset:], isSmall)
keyLength := int(d.decodeUint16(data[entryOffset+offsetSize:]))
// Key must start after value entry
if keyOffset < headerSize {
d.err = errors.Errorf("invalid key offset %d, must > %d", keyOffset, headerSize)
return nil
}
if d.isDataShort(data, keyOffset+keyLength) {
return nil
}
keys[i] = string(data[keyOffset : keyOffset+keyLength])
}
}
if d.err != nil {
return nil
}
values := make([]interface{}, count)
for i := 0; i < count; i++ {
// decode value
entryOffset := 2*offsetSize + valueEntrySize*i
if isObject {
entryOffset += keyEntrySize * count
}
tp := data[entryOffset]
if isInlineValue(tp, isSmall) {
values[i] = d.decodeValue(tp, data[entryOffset+1:entryOffset+valueEntrySize])
continue
}
valueOffset := d.decodeCount(data[entryOffset+1:], isSmall)
if d.isDataShort(data, valueOffset) {
return nil
}
values[i] = d.decodeValue(tp, data[valueOffset:])
}
if d.err != nil {
return nil
}
if !isObject {
return values
}
m := make(map[string]interface{}, count)
for i := 0; i < count; i++ {
m[keys[i]] = values[i]
}
return m
}
func isInlineValue(tp byte, isSmall bool) bool {
switch tp {
case jsonInt16, jsonUint16, jsonLiteral:
return true
case jsonInt32, jsonUint32:
return !isSmall
}
return false
}
func (d *jsonBinaryDecoder) decodeLiteral(data []byte) interface{} {
if d.isDataShort(data, 1) {
return nil
}
tp := data[0]
switch tp {
case jsonNull:
return nil
case jsonTrue:
return true
case jsonFalse:
return false
}
d.err = errors.Errorf("invalid literal %c", tp)
return nil
}
func (d *jsonBinaryDecoder) isDataShort(data []byte, expected int) bool {
if d.err != nil {
return true
}
if len(data) < expected {
d.err = errors.Errorf("data len %d < expected %d", len(data), expected)
}
return d.err != nil
}
func (d *jsonBinaryDecoder) decodeInt16(data []byte) int16 {
if d.isDataShort(data, 2) {
return 0
}
v := SignUint16(DecodeUint16(data))
return v
}
func (d *jsonBinaryDecoder) decodeUint16(data []byte) uint16 {
if d.isDataShort(data, 2) {
return 0
}
v := DecodeUint16(data)
return v
}
func (d *jsonBinaryDecoder) decodeInt32(data []byte) int32 {
if d.isDataShort(data, 4) {
return 0
}
v := SignUint32(DecodeUint32(data))
return v
}
func (d *jsonBinaryDecoder) decodeUint32(data []byte) uint32 {
if d.isDataShort(data, 4) {
return 0
}
v := DecodeUint32(data)
return v
}
func (d *jsonBinaryDecoder) decodeInt64(data []byte) int64 {
if d.isDataShort(data, 8) {
return 0
}
v := SignUint64(DecodeUint64(data))
return v
}
func (d *jsonBinaryDecoder) decodeUint64(data []byte) uint64 {
if d.isDataShort(data, 8) {
return 0
}
v := DecodeUint64(data)
return v
}
func (d *jsonBinaryDecoder) decodeDouble(data []byte) float64 {
if d.isDataShort(data, 8) {
return 0
}
v := DecodeFloat64(data)
return v
}
func (d *jsonBinaryDecoder) decodeString(data []byte) string {
if d.err != nil {
return ""
}
l, n := d.decodeVariableLength(data)
if d.isDataShort(data, l+n) {
return ""
}
data = data[n:]
v := string(data[0:l])
return v
}
func (d *jsonBinaryDecoder) decodeOpaque(data []byte) interface{} {
if d.isDataShort(data, 1) {
return nil
}
tp := data[0]
data = data[1:]
l, n := d.decodeVariableLength(data)
if d.isDataShort(data, l+n) {
return nil
}
data = data[n : l+n]
switch ColumnType(tp) {
case ColumnTypeNewDecimal:
return d.decodeDecimal(data)
case ColumnTypeTime:
return d.decodeTime(data)
case ColumnTypeDate,
ColumnTypeDatetime, ColumnTypeDatetime2,
ColumnTypeTimestamp, ColumnTypeTimestamp2:
return d.decodeDateTime(data)
default:
return string(data)
}
}
func (d *jsonBinaryDecoder) decodeDecimal(data []byte) interface{} {
precision := int(data[0])
scale := int(data[1])
v, _ := DecodeDecimal(data[2:], precision, scale)
return v
}
func (d *jsonBinaryDecoder) decodeTime(data []byte) interface{} {
v := d.decodeInt64(data)
if v == 0 {
return "00:00:00"
}
sign := ""
if v < 0 {
sign = "-"
v = -v
}
intPart := v >> 24
hour := (intPart >> 12) % (1 << 10)
min := (intPart >> 6) % (1 << 6)
sec := intPart % (1 << 6)
frac := v % (1 << 24)
return fmt.Sprintf("%s%02d:%02d:%02d.%06d", sign, hour, min, sec, frac)
}
func (d *jsonBinaryDecoder) decodeDateTime(data []byte) interface{} {
v := d.decodeInt64(data)
if v == 0 {
return "0000-00-00 00:00:00"
}
// handle negative?
if v < 0 {
v = -v
}
intPart := v >> 24
ymd := intPart >> 17
ym := ymd >> 5
hms := intPart % (1 << 17)
year := ym / 13
month := ym % 13
day := ymd % (1 << 5)
hour := (hms >> 12)
minute := (hms >> 6) % (1 << 6)
second := hms % (1 << 6)
frac := v % (1 << 24)
return fmt.Sprintf("%04d-%02d-%02d %02d:%02d:%02d.%06d", year, month, day, hour, minute, second, frac)
}
func (d *jsonBinaryDecoder) decodeCount(data []byte, isSmall bool) int {
if isSmall {
v := d.decodeUint16(data)
return int(v)
}
return int(d.decodeUint32(data))
}
func (d *jsonBinaryDecoder) decodeVariableLength(data []byte) (int, int) {
// The max size for variable length is math.MaxUint32, so
// here we can use 5 bytes to save it.
maxCount := 5
if len(data) < maxCount {
maxCount = len(data)
}
pos := 0
length := uint64(0)
for ; pos < maxCount; pos++ {
v := data[pos]
length |= uint64(v&0x7F) << uint(7*pos)
if v&0x80 == 0 {
if length > math.MaxUint32 {
d.err = errors.Errorf("variable length %d must <= %d", length, math.MaxUint32)
return 0, 0
}
pos++
// TODO: should consider length overflow int here.
return int(length), pos
}
}
d.err = errors.New("decode variable length failed")
return 0, 0
}

View File

@ -6,6 +6,14 @@ import (
"github.com/localhots/bocadillo/mysql"
)
func TestJSON(t *testing.T) {
tbl := suite.createTable(mysql.ColumnTypeJSON, "", attrNone)
defer tbl.drop(t)
exp := []byte(`{"hello": "world", "foo": [1, 2, 3.75]}`)
suite.insertAndCompare(t, tbl, exp)
}
func TestSet(t *testing.T) {
tbl := suite.createTable(mysql.ColumnTypeSet, "'a', 'b', 'c'", attrNone)
defer tbl.drop(t)

View File

@ -3,6 +3,7 @@ package tests
import (
"bytes"
"database/sql"
"encoding/json"
"fmt"
"log"
"reflect"
@ -10,6 +11,7 @@ import (
"testing"
"time"
"github.com/google/go-cmp/cmp"
"github.com/localhots/bocadillo/mysql"
"github.com/localhots/bocadillo/reader"
)
@ -155,6 +157,13 @@ func colTypeSyntax(ct mysql.ColumnType) (typName, attrs string) {
case mysql.ColumnTypeSet:
return "SET", ""
case mysql.ColumnTypeJSON:
return "JSON", ""
case mysql.ColumnTypeGeometry:
return "GEOMETRY", ""
case mysql.ColumnTypeBit:
return "BIT", ""
default:
panic(fmt.Errorf("Syntax not defined for %s", ct.String()))
}
@ -223,8 +232,22 @@ func (s *testSuite) compare(t *testing.T, tbl *table, exp, res interface{}) {
// fmt.Printf("VALUE RECEIVED: %T(%+v), EXPECTED: %T(%+v)\n", res, res, exp, exp)
switch texp := exp.(type) {
case []byte:
if !bytes.Equal(texp, res.([]byte)) {
t.Errorf("Expected %T(%+v), got %T(%+v)", exp, exp, res, res)
switch tbl.colTyp {
case mysql.ColumnTypeJSON:
var jExp, jRes interface{}
if err := json.Unmarshal(texp, &jExp); err != nil {
panic(err)
}
if err := json.Unmarshal(res.([]byte), &jRes); err != nil {
panic(err)
}
if !cmp.Equal(jExp, jRes) {
t.Errorf("JSON values are different: %s", cmp.Diff(jExp, jRes))
}
default:
if !bytes.Equal(texp, res.([]byte)) {
t.Errorf("Expected %T(%+v), got %T(%+v)", exp, exp, res, res)
}
}
default:
if exp != res {
@ -233,12 +256,6 @@ func (s *testSuite) compare(t *testing.T, tbl *table, exp, res interface{}) {
}
}
func (s *testSuite) insertAndCompare(t *testing.T, tbl *table, val interface{}) {
t.Helper()
tbl.insert(t, val)
suite.expectValue(t, tbl, val)
}
func signNumber(val interface{}, ct mysql.ColumnType) interface{} {
switch tval := val.(type) {
case uint8:

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@ -2,7 +2,6 @@ package tools
import (
"encoding/binary"
"math"
"github.com/localhots/bocadillo/mysql"
)
@ -98,12 +97,12 @@ func (b *Buffer) ReadVarLen64(n int) uint64 {
// ReadFloat32 reads a float32 and advances cursor by 4 bytes.
func (b *Buffer) ReadFloat32() float32 {
return math.Float32frombits(b.ReadUint32())
return b.ReadFloat32()
}
// ReadFloat64 reads a float64 and advances cursor by 8 bytes.
func (b *Buffer) ReadFloat64() float64 {
return math.Float64frombits(b.ReadUint64())
return b.ReadFloat64()
}
// ReadStringNullTerm reads a NULL-terminated string and advances cursor by its