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sink/mq(ticdc): split json.go and add callback (#6176)
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,188 @@ | ||
| // Copyright 2022 PingCAP, Inc. | ||
| // | ||
| // Licensed under the Apache License, Version 2.0 (the "License"); | ||
| // you may not use this file except in compliance with the License. | ||
| // You may obtain a copy of the License at | ||
| // | ||
| // http://www.apache.org/licenses/LICENSE-2.0 | ||
| // | ||
| // Unless required by applicable law or agreed to in writing, software | ||
| // distributed under the License is distributed on an "AS IS" BASIS, | ||
| // See the License for the specific language governing permissions and | ||
| // limitations under the License. | ||
|
|
||
| package codec | ||
|
|
||
| import ( | ||
| "encoding/base64" | ||
| "encoding/json" | ||
| "strconv" | ||
|
|
||
| "github.com/pingcap/log" | ||
| "github.com/pingcap/tidb/parser/mysql" | ||
| "github.com/pingcap/tiflow/cdc/model" | ||
| "go.uber.org/zap" | ||
| "golang.org/x/text/encoding/charmap" | ||
| ) | ||
|
|
||
| type column struct { | ||
| Type byte `json:"t"` | ||
| // Deprecated: please use Flag instead. | ||
| WhereHandle *bool `json:"h,omitempty"` | ||
| Flag model.ColumnFlagType `json:"f"` | ||
| Value any `json:"v"` | ||
| } | ||
|
|
||
| func newColumn(value any, tp byte) *column { | ||
| return &column{ | ||
| Value: value, | ||
| Type: tp, | ||
| } | ||
| } | ||
|
|
||
| func (c *column) fromRowChangeColumn(col *model.Column) { | ||
| c.Type = col.Type | ||
| c.Flag = col.Flag | ||
| if c.Flag.IsHandleKey() { | ||
| whereHandle := true | ||
| c.WhereHandle = &whereHandle | ||
| } | ||
| if col.Value == nil { | ||
| c.Value = nil | ||
| return | ||
| } | ||
| switch col.Type { | ||
| case mysql.TypeString, mysql.TypeVarString, mysql.TypeVarchar: | ||
| var str string | ||
| switch col.Value.(type) { | ||
| case []byte: | ||
| str = string(col.Value.([]byte)) | ||
| case string: | ||
| str = col.Value.(string) | ||
| default: | ||
| log.Panic("invalid column value, please report a bug", zap.Any("col", col)) | ||
| } | ||
| if c.Flag.IsBinary() { | ||
| str = strconv.Quote(str) | ||
| str = str[1 : len(str)-1] | ||
| } | ||
| c.Value = str | ||
| default: | ||
| c.Value = col.Value | ||
| } | ||
| } | ||
|
|
||
| func (c *column) toRowChangeColumn(name string) *model.Column { | ||
| col := new(model.Column) | ||
| col.Type = c.Type | ||
| col.Flag = c.Flag | ||
| col.Name = name | ||
| col.Value = c.Value | ||
| if c.Value == nil { | ||
| return col | ||
| } | ||
| switch col.Type { | ||
| case mysql.TypeString, mysql.TypeVarString, mysql.TypeVarchar: | ||
| str := col.Value.(string) | ||
| var err error | ||
| if c.Flag.IsBinary() { | ||
| str, err = strconv.Unquote("\"" + str + "\"") | ||
| if err != nil { | ||
| log.Panic("invalid column value, please report a bug", zap.Any("col", c), zap.Error(err)) | ||
| } | ||
| } | ||
| col.Value = []byte(str) | ||
| default: | ||
| col.Value = c.Value | ||
| } | ||
| return col | ||
| } | ||
|
|
||
| func (c *column) toCanalJSONFormatColumn(name string, javaType JavaSQLType) *model.Column { | ||
| col := new(model.Column) | ||
| col.Type = c.Type | ||
| col.Flag = c.Flag | ||
| col.Name = name | ||
| col.Value = c.Value | ||
| if c.Value == nil { | ||
| return col | ||
| } | ||
|
|
||
| value, ok := col.Value.(string) | ||
| if !ok { | ||
| log.Panic("canal-json encoded message should have type in `string`") | ||
| } | ||
|
|
||
| if javaType == JavaSQLTypeBIT { | ||
| val, err := strconv.ParseUint(value, 10, 64) | ||
| if err != nil { | ||
| log.Panic("invalid column value for bit", zap.Any("col", c), zap.Error(err)) | ||
| } | ||
| col.Value = val | ||
| return col | ||
| } | ||
|
|
||
| if javaType != JavaSQLTypeBLOB { | ||
| col.Value = value | ||
| return col | ||
| } | ||
|
|
||
| // when encoding the `JavaSQLTypeBLOB`, use `ISO8859_1` decoder, now reverse it back. | ||
| encoder := charmap.ISO8859_1.NewEncoder() | ||
| value, err := encoder.String(value) | ||
| if err != nil { | ||
| log.Panic("invalid column value, please report a bug", zap.Any("col", c), zap.Error(err)) | ||
| } | ||
|
|
||
| col.Value = value | ||
| return col | ||
| } | ||
|
|
||
| func formatColumn(c column) column { | ||
| switch c.Type { | ||
| case mysql.TypeTinyBlob, mysql.TypeMediumBlob, | ||
| mysql.TypeLongBlob, mysql.TypeBlob: | ||
| if s, ok := c.Value.(string); ok { | ||
| var err error | ||
| c.Value, err = base64.StdEncoding.DecodeString(s) | ||
| if err != nil { | ||
| log.Panic("invalid column value, please report a bug", zap.Any("col", c), zap.Error(err)) | ||
| } | ||
| } | ||
| case mysql.TypeFloat, mysql.TypeDouble: | ||
| if s, ok := c.Value.(json.Number); ok { | ||
| f64, err := s.Float64() | ||
| if err != nil { | ||
| log.Panic("invalid column value, please report a bug", zap.Any("col", c), zap.Error(err)) | ||
| } | ||
| c.Value = f64 | ||
| } | ||
| case mysql.TypeTiny, mysql.TypeShort, mysql.TypeLong, mysql.TypeLonglong, mysql.TypeInt24, mysql.TypeYear: | ||
| if s, ok := c.Value.(json.Number); ok { | ||
| var err error | ||
| if c.Flag.IsUnsigned() { | ||
| c.Value, err = strconv.ParseUint(s.String(), 10, 64) | ||
| } else { | ||
| c.Value, err = strconv.ParseInt(s.String(), 10, 64) | ||
| } | ||
| if err != nil { | ||
| log.Panic("invalid column value, please report a bug", zap.Any("col", c), zap.Error(err)) | ||
| } | ||
| } else if f, ok := c.Value.(float64); ok { | ||
| if c.Flag.IsUnsigned() { | ||
| c.Value = uint64(f) | ||
| } else { | ||
| c.Value = int64(f) | ||
| } | ||
| } | ||
| case mysql.TypeBit: | ||
| if s, ok := c.Value.(json.Number); ok { | ||
| intNum, err := s.Int64() | ||
| if err != nil { | ||
| log.Panic("invalid column value, please report a bug", zap.Any("col", c), zap.Error(err)) | ||
| } | ||
| c.Value = uint64(intNum) | ||
| } | ||
| } | ||
| return c | ||
| } |
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