mirror of
https://github.com/tendermint/tendermint.git
synced 2026-01-05 13:05:09 +00:00
Delete the custom libs/json (tmjson) package. (#7673)
There are no further uses of this package anywhere in Tendermint. All the uses in the Cosmos SDK are for types that now work correctly with the standard encoding/json package.
This commit is contained in:
M. J. Fromberger
GitHub
@@ -1,278 +0,0 @@
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package json
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import (
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"bytes"
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"encoding/json"
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"errors"
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"fmt"
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"reflect"
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)
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// Unmarshal unmarshals JSON into the given value, using Amino-compatible JSON encoding (strings
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// for 64-bit numbers, and type wrappers for registered types).
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func Unmarshal(bz []byte, v interface{}) error {
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return decode(bz, v)
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}
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func decode(bz []byte, v interface{}) error {
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if len(bz) == 0 {
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return errors.New("cannot decode empty bytes")
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}
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rv := reflect.ValueOf(v)
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if rv.Kind() != reflect.Ptr {
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return errors.New("must decode into a pointer")
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}
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rv = rv.Elem()
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// If this is a registered type, defer to interface decoder regardless of whether the input is
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// an interface or a bare value. This retains Amino's behavior, but is inconsistent with
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// behavior in structs where an interface field will get the type wrapper while a bare value
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// field will not.
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if typeRegistry.name(rv.Type()) != "" {
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return decodeReflectInterface(bz, rv)
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}
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return decodeReflect(bz, rv)
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}
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func decodeReflect(bz []byte, rv reflect.Value) error {
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if !rv.CanAddr() {
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return errors.New("value is not addressable")
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}
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// Handle null for slices, interfaces, and pointers
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if bytes.Equal(bz, []byte("null")) {
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rv.Set(reflect.Zero(rv.Type()))
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return nil
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}
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// Dereference-and-construct pointers, to handle nested pointers.
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for rv.Kind() == reflect.Ptr {
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if rv.IsNil() {
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rv.Set(reflect.New(rv.Type().Elem()))
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}
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rv = rv.Elem()
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}
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// Times must be UTC and end with Z
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if rv.Type() == timeType {
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switch {
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case len(bz) < 2 || bz[0] != '"' || bz[len(bz)-1] != '"':
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return fmt.Errorf("JSON time must be an RFC3339 string, but got %q", bz)
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case bz[len(bz)-2] != 'Z':
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return fmt.Errorf("JSON time must be UTC and end with 'Z', but got %q", bz)
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}
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}
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// If value implements json.Umarshaler, call it.
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if rv.Addr().Type().Implements(jsonUnmarshalerType) {
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return rv.Addr().Interface().(json.Unmarshaler).UnmarshalJSON(bz)
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}
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switch rv.Type().Kind() {
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// Decode complex types recursively.
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case reflect.Slice, reflect.Array:
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return decodeReflectList(bz, rv)
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case reflect.Map:
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return decodeReflectMap(bz, rv)
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case reflect.Struct:
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return decodeReflectStruct(bz, rv)
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case reflect.Interface:
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return decodeReflectInterface(bz, rv)
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// For 64-bit integers, unwrap expected string and defer to stdlib for integer decoding.
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case reflect.Int64, reflect.Int, reflect.Uint64, reflect.Uint:
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if bz[0] != '"' || bz[len(bz)-1] != '"' {
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return fmt.Errorf("invalid 64-bit integer encoding %q, expected string", string(bz))
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}
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bz = bz[1 : len(bz)-1]
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fallthrough
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// Anything else we defer to the stdlib.
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default:
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return decodeStdlib(bz, rv)
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}
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}
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func decodeReflectList(bz []byte, rv reflect.Value) error {
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if !rv.CanAddr() {
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return errors.New("list value is not addressable")
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}
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switch rv.Type().Elem().Kind() {
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// Decode base64-encoded bytes using stdlib decoder, via byte slice for arrays.
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case reflect.Uint8:
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if rv.Type().Kind() == reflect.Array {
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var buf []byte
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if err := json.Unmarshal(bz, &buf); err != nil {
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return err
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}
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if len(buf) != rv.Len() {
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return fmt.Errorf("got %v bytes, expected %v", len(buf), rv.Len())
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}
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reflect.Copy(rv, reflect.ValueOf(buf))
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} else if err := decodeStdlib(bz, rv); err != nil {
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return err
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}
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// Decode anything else into a raw JSON slice, and decode values recursively.
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default:
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var rawSlice []json.RawMessage
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if err := json.Unmarshal(bz, &rawSlice); err != nil {
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return err
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}
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if rv.Type().Kind() == reflect.Slice {
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rv.Set(reflect.MakeSlice(reflect.SliceOf(rv.Type().Elem()), len(rawSlice), len(rawSlice)))
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}
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if rv.Len() != len(rawSlice) { // arrays of wrong size
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return fmt.Errorf("got list of %v elements, expected %v", len(rawSlice), rv.Len())
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}
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for i, bz := range rawSlice {
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if err := decodeReflect(bz, rv.Index(i)); err != nil {
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return err
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}
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}
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}
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// Replace empty slices with nil slices, for Amino compatibility
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if rv.Type().Kind() == reflect.Slice && rv.Len() == 0 {
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rv.Set(reflect.Zero(rv.Type()))
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}
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return nil
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}
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func decodeReflectMap(bz []byte, rv reflect.Value) error {
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if !rv.CanAddr() {
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return errors.New("map value is not addressable")
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}
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// Decode into a raw JSON map, using string keys.
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rawMap := make(map[string]json.RawMessage)
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if err := json.Unmarshal(bz, &rawMap); err != nil {
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return err
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}
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if rv.Type().Key().Kind() != reflect.String {
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return fmt.Errorf("map keys must be strings, got %v", rv.Type().Key().String())
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}
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// Recursively decode values.
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rv.Set(reflect.MakeMapWithSize(rv.Type(), len(rawMap)))
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for key, bz := range rawMap {
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value := reflect.New(rv.Type().Elem()).Elem()
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if err := decodeReflect(bz, value); err != nil {
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return err
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}
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rv.SetMapIndex(reflect.ValueOf(key), value)
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}
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return nil
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}
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func decodeReflectStruct(bz []byte, rv reflect.Value) error {
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if !rv.CanAddr() {
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return errors.New("struct value is not addressable")
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}
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sInfo := makeStructInfo(rv.Type())
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// Decode raw JSON values into a string-keyed map.
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rawMap := make(map[string]json.RawMessage)
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if err := json.Unmarshal(bz, &rawMap); err != nil {
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return err
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}
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for i, fInfo := range sInfo.fields {
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if !fInfo.hidden {
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frv := rv.Field(i)
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bz := rawMap[fInfo.jsonName]
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if len(bz) > 0 {
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if err := decodeReflect(bz, frv); err != nil {
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return err
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}
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} else if !fInfo.omitEmpty {
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frv.Set(reflect.Zero(frv.Type()))
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}
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}
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}
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return nil
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}
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func decodeReflectInterface(bz []byte, rv reflect.Value) error {
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if !rv.CanAddr() {
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return errors.New("interface value not addressable")
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}
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// Decode the interface wrapper.
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wrapper := interfaceWrapper{}
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if err := json.Unmarshal(bz, &wrapper); err != nil {
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return err
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}
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if wrapper.Type == "" {
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return errors.New("interface type cannot be empty")
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}
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if len(wrapper.Value) == 0 {
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return errors.New("interface value cannot be empty")
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}
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// Dereference-and-construct pointers, to handle nested pointers.
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for rv.Kind() == reflect.Ptr {
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if rv.IsNil() {
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rv.Set(reflect.New(rv.Type().Elem()))
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}
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rv = rv.Elem()
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}
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// Look up the interface type, and construct a concrete value.
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rt, returnPtr := typeRegistry.lookup(wrapper.Type)
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if rt == nil {
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return fmt.Errorf("unknown type %q", wrapper.Type)
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}
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cptr := reflect.New(rt)
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crv := cptr.Elem()
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if err := decodeReflect(wrapper.Value, crv); err != nil {
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return err
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}
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// This makes sure interface implementations with pointer receivers (e.g. func (c *Car)) are
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// constructed as pointers behind the interface. The types must be registered as pointers with
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// RegisterType().
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if rv.Type().Kind() == reflect.Interface && returnPtr {
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if !cptr.Type().AssignableTo(rv.Type()) {
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return fmt.Errorf("invalid type %q for this value", wrapper.Type)
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}
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rv.Set(cptr)
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} else {
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if !crv.Type().AssignableTo(rv.Type()) {
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return fmt.Errorf("invalid type %q for this value", wrapper.Type)
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}
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rv.Set(crv)
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}
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return nil
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}
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func decodeStdlib(bz []byte, rv reflect.Value) error {
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if !rv.CanAddr() && rv.Kind() != reflect.Ptr {
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return errors.New("value must be addressable or pointer")
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}
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// Make sure we are unmarshaling into a pointer.
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target := rv
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if rv.Kind() != reflect.Ptr {
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target = reflect.New(rv.Type())
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}
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if err := json.Unmarshal(bz, target.Interface()); err != nil {
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return err
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}
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rv.Set(target.Elem())
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return nil
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}
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type interfaceWrapper struct {
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Type string `json:"type"`
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Value json.RawMessage `json:"value"`
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}
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@@ -1,151 +0,0 @@
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package json_test
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import (
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"reflect"
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"testing"
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"time"
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"github.com/stretchr/testify/assert"
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"github.com/stretchr/testify/require"
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"github.com/tendermint/tendermint/libs/json"
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)
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func TestUnmarshal(t *testing.T) {
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i64Nil := (*int64)(nil)
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str := "string"
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strPtr := &str
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structNil := (*Struct)(nil)
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i32 := int32(32)
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i64 := int64(64)
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testcases := map[string]struct {
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json string
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value interface{}
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err bool
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}{
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"bool true": {"true", true, false},
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"bool false": {"false", false, false},
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"float32": {"3.14", float32(3.14), false},
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"float64": {"3.14", float64(3.14), false},
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"int32": {`32`, int32(32), false},
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"int32 string": {`"32"`, int32(32), true},
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"int32 ptr": {`32`, &i32, false},
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"int64": {`"64"`, int64(64), false},
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"int64 noend": {`"64`, int64(64), true},
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"int64 number": {`64`, int64(64), true},
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"int64 ptr": {`"64"`, &i64, false},
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"int64 ptr nil": {`null`, i64Nil, false},
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"string": {`"foo"`, "foo", false},
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"string noend": {`"foo`, "foo", true},
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"string ptr": {`"string"`, &str, false},
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"slice byte": {`"AQID"`, []byte{1, 2, 3}, false},
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"slice bytes": {`["AQID"]`, [][]byte{{1, 2, 3}}, false},
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"slice int32": {`[1,2,3]`, []int32{1, 2, 3}, false},
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"slice int64": {`["1","2","3"]`, []int64{1, 2, 3}, false},
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"slice int64 number": {`[1,2,3]`, []int64{1, 2, 3}, true},
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"slice int64 ptr": {`["64"]`, []*int64{&i64}, false},
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"slice int64 empty": {`[]`, []int64(nil), false},
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"slice int64 null": {`null`, []int64(nil), false},
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"array byte": {`"AQID"`, [3]byte{1, 2, 3}, false},
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"array byte large": {`"AQID"`, [4]byte{1, 2, 3, 4}, true},
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"array byte small": {`"AQID"`, [2]byte{1, 2}, true},
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"array int32": {`[1,2,3]`, [3]int32{1, 2, 3}, false},
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"array int64": {`["1","2","3"]`, [3]int64{1, 2, 3}, false},
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"array int64 number": {`[1,2,3]`, [3]int64{1, 2, 3}, true},
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"array int64 large": {`["1","2","3"]`, [4]int64{1, 2, 3, 4}, true},
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"array int64 small": {`["1","2","3"]`, [2]int64{1, 2}, true},
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"map bytes": {`{"b":"AQID"}`, map[string][]byte{"b": {1, 2, 3}}, false},
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"map int32": {`{"a":1,"b":2}`, map[string]int32{"a": 1, "b": 2}, false},
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"map int64": {`{"a":"1","b":"2"}`, map[string]int64{"a": 1, "b": 2}, false},
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"map int64 empty": {`{}`, map[string]int64{}, false},
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"map int64 null": {`null`, map[string]int64(nil), false},
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"map int key": {`{}`, map[int]int{}, true},
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"time": {`"2020-06-03T17:35:30Z"`, time.Date(2020, 6, 3, 17, 35, 30, 0, time.UTC), false},
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"time non-utc": {`"2020-06-03T17:35:30+02:00"`, time.Time{}, true},
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"time nozone": {`"2020-06-03T17:35:30"`, time.Time{}, true},
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"car": {`{"type":"vehicle/car","value":{"Wheels":4}}`, Car{Wheels: 4}, false},
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"car ptr": {`{"type":"vehicle/car","value":{"Wheels":4}}`, &Car{Wheels: 4}, false},
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"car iface": {`{"type":"vehicle/car","value":{"Wheels":4}}`, Vehicle(&Car{Wheels: 4}), false},
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"boat": {`{"type":"vehicle/boat","value":{"Sail":true}}`, Boat{Sail: true}, false},
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"boat ptr": {`{"type":"vehicle/boat","value":{"Sail":true}}`, &Boat{Sail: true}, false},
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"boat iface": {`{"type":"vehicle/boat","value":{"Sail":true}}`, Vehicle(Boat{Sail: true}), false},
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"boat into car": {`{"type":"vehicle/boat","value":{"Sail":true}}`, Car{}, true},
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"boat into car iface": {`{"type":"vehicle/boat","value":{"Sail":true}}`, Vehicle(&Car{}), true},
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"shoes": {`{"type":"vehicle/shoes","value":{"Soles":"rubber"}}`, Car{}, true},
|
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"shoes ptr": {`{"type":"vehicle/shoes","value":{"Soles":"rubber"}}`, &Car{}, true},
|
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"shoes iface": {`{"type":"vehicle/shoes","value":{"Soles":"rubbes"}}`, Vehicle(&Car{}), true},
|
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"key public": {`{"type":"key/public","value":"AQIDBAUGBwg="}`, PublicKey{1, 2, 3, 4, 5, 6, 7, 8}, false},
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"key wrong": {`{"type":"key/public","value":"AQIDBAUGBwg="}`, PrivateKey{1, 2, 3, 4, 5, 6, 7, 8}, true},
|
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"key into car": {`{"type":"key/public","value":"AQIDBAUGBwg="}`, Vehicle(&Car{}), true},
|
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"tags": {
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`{"name":"name","OmitEmpty":"foo","Hidden":"bar","tags":{"name":"child"}}`,
|
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Tags{JSONName: "name", OmitEmpty: "foo", Tags: &Tags{JSONName: "child"}},
|
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false,
|
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},
|
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"tags ptr": {
|
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`{"name":"name","OmitEmpty":"foo","tags":null}`,
|
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&Tags{JSONName: "name", OmitEmpty: "foo"},
|
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false,
|
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},
|
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"tags real name": {`{"JSONName":"name"}`, Tags{}, false},
|
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"struct": {
|
||||
`{
|
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"Bool":true, "Float64":3.14, "Int32":32, "Int64":"64", "Int64Ptr":"64",
|
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"String":"foo", "StringPtrPtr": "string", "Bytes":"AQID",
|
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"Time":"2020-06-02T16:05:13.004346374Z",
|
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"Car":{"Wheels":4},
|
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"Boat":{"Sail":true},
|
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"Vehicles":[
|
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{"type":"vehicle/car","value":{"Wheels":4}},
|
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{"type":"vehicle/boat","value":{"Sail":true}}
|
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],
|
||||
"Child":{
|
||||
"Bool":false, "Float64":0, "Int32":0, "Int64":"0", "Int64Ptr":null,
|
||||
"String":"child", "StringPtrPtr":null, "Bytes":null,
|
||||
"Time":"0001-01-01T00:00:00Z",
|
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"Car":null, "Boat":{"Sail":false}, "Vehicles":null, "Child":null
|
||||
},
|
||||
"private": "foo", "unknown": "bar"
|
||||
}`,
|
||||
Struct{
|
||||
Bool: true, Float64: 3.14, Int32: 32, Int64: 64, Int64Ptr: &i64,
|
||||
String: "foo", StringPtrPtr: &strPtr, Bytes: []byte{1, 2, 3},
|
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Time: time.Date(2020, 6, 2, 16, 5, 13, 4346374, time.UTC),
|
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Car: &Car{Wheels: 4}, Boat: Boat{Sail: true}, Vehicles: []Vehicle{
|
||||
Vehicle(&Car{Wheels: 4}),
|
||||
Vehicle(Boat{Sail: true}),
|
||||
},
|
||||
Child: &Struct{Bool: false, String: "child"},
|
||||
},
|
||||
false,
|
||||
},
|
||||
"struct key into vehicle": {`{"Vehicles":[
|
||||
{"type":"vehicle/car","value":{"Wheels":4}},
|
||||
{"type":"key/public","value":"MTIzNDU2Nzg="}
|
||||
]}`, Struct{}, true},
|
||||
"struct ptr null": {`null`, structNil, false},
|
||||
"custom value": {`{"Value":"foo"}`, CustomValue{}, false},
|
||||
"custom ptr": {`"foo"`, &CustomPtr{Value: "custom"}, false},
|
||||
"custom ptr value": {`"foo"`, CustomPtr{Value: "custom"}, false},
|
||||
"invalid type": {`"foo"`, Struct{}, true},
|
||||
}
|
||||
for name, tc := range testcases {
|
||||
tc := tc
|
||||
t.Run(name, func(t *testing.T) {
|
||||
// Create a target variable as a pointer to the zero value of the tc.value type,
|
||||
// and wrap it in an empty interface. Decode into that interface.
|
||||
target := reflect.New(reflect.TypeOf(tc.value)).Interface()
|
||||
err := json.Unmarshal([]byte(tc.json), target)
|
||||
if tc.err {
|
||||
require.Error(t, err)
|
||||
return
|
||||
}
|
||||
require.NoError(t, err)
|
||||
|
||||
// Unwrap the target pointer and get the value behind the interface.
|
||||
actual := reflect.ValueOf(target).Elem().Interface()
|
||||
assert.Equal(t, tc.value, actual)
|
||||
})
|
||||
}
|
||||
}
|
||||
@@ -1,99 +0,0 @@
|
||||
// Package json provides functions for marshaling and unmarshaling JSON in a format that is
|
||||
// backwards-compatible with Amino JSON encoding. This mostly differs from encoding/json in
|
||||
// encoding of integers (64-bit integers are encoded as strings, not numbers), and handling
|
||||
// of interfaces (wrapped in an interface object with type/value keys).
|
||||
//
|
||||
// JSON tags (e.g. `json:"name,omitempty"`) are supported in the same way as encoding/json, as is
|
||||
// custom marshaling overrides via the json.Marshaler and json.Unmarshaler interfaces.
|
||||
//
|
||||
// Note that not all JSON emitted by Tendermint is generated by this library; some is generated by
|
||||
// encoding/json instead, and kept like that for backwards compatibility.
|
||||
//
|
||||
// Encoding of numbers uses strings for 64-bit integers (including unspecified ints), to improve
|
||||
// compatibility with e.g. Javascript (which uses 64-bit floats for numbers, having 53-bit
|
||||
// precision):
|
||||
//
|
||||
// int32(32) // Output: 32
|
||||
// uint32(32) // Output: 32
|
||||
// int64(64) // Output: "64"
|
||||
// uint64(64) // Output: "64"
|
||||
// int(64) // Output: "64"
|
||||
// uint(64) // Output: "64"
|
||||
//
|
||||
// Encoding of other scalars follows encoding/json:
|
||||
//
|
||||
// nil // Output: null
|
||||
// true // Output: true
|
||||
// "foo" // Output: "foo"
|
||||
// "" // Output: ""
|
||||
//
|
||||
// Slices and arrays are encoded as encoding/json, including base64-encoding of byte slices
|
||||
// with additional base64-encoding of byte arrays as well:
|
||||
//
|
||||
// []int64(nil) // Output: null
|
||||
// []int64{} // Output: []
|
||||
// []int64{1, 2, 3} // Output: ["1", "2", "3"]
|
||||
// []int32{1, 2, 3} // Output: [1, 2, 3]
|
||||
// []byte{1, 2, 3} // Output: "AQID"
|
||||
// [3]int64{1, 2, 3} // Output: ["1", "2", "3"]
|
||||
// [3]byte{1, 2, 3} // Output: "AQID"
|
||||
//
|
||||
// Maps are encoded as encoding/json, but only strings are allowed as map keys (nil maps are not
|
||||
// emitted as null, to retain Amino backwards-compatibility):
|
||||
//
|
||||
// map[string]int64(nil) // Output: {}
|
||||
// map[string]int64{} // Output: {}
|
||||
// map[string]int64{"a":1,"b":2} // Output: {"a":"1","b":"2"}
|
||||
// map[string]int32{"a":1,"b":2} // Output: {"a":1,"b":2}
|
||||
// map[bool]int{true:1} // Errors
|
||||
//
|
||||
// Times are encoded as encoding/json, in RFC3339Nano format, but requiring UTC time zone (with zero
|
||||
// times emitted as "0001-01-01T00:00:00Z" as with encoding/json):
|
||||
//
|
||||
// time.Date(2020, 6, 8, 16, 21, 28, 123, time.FixedZone("UTC+2", 2*60*60))
|
||||
// // Output: "2020-06-08T14:21:28.000000123Z"
|
||||
// time.Time{} // Output: "0001-01-01T00:00:00Z"
|
||||
// (*time.Time)(nil) // Output: null
|
||||
//
|
||||
// Structs are encoded as encoding/json, supporting JSON tags and ignoring private fields:
|
||||
//
|
||||
// type Struct struct{
|
||||
// Name string
|
||||
// Value int32 `json:"value,omitempty"`
|
||||
// private bool
|
||||
// }
|
||||
//
|
||||
// Struct{Name: "foo", Value: 7, private: true} // Output: {"Name":"foo","value":7}
|
||||
// Struct{} // Output: {"Name":""}
|
||||
//
|
||||
// Registered types are encoded with type wrapper, regardless of whether they are given as interface
|
||||
// or bare struct, but inside structs they are only emitted with type wrapper for interface fields
|
||||
// (this follows Amino behavior):
|
||||
//
|
||||
// type Vehicle interface {
|
||||
// Drive() error
|
||||
// }
|
||||
//
|
||||
// type Car struct {
|
||||
// Wheels int8
|
||||
// }
|
||||
//
|
||||
// func (c *Car) Drive() error { return nil }
|
||||
//
|
||||
// RegisterType(&Car{}, "vehicle/car")
|
||||
//
|
||||
// Car{Wheels: 4} // Output: {"type":"vehicle/car","value":{"Wheels":4}}
|
||||
// &Car{Wheels: 4} // Output: {"type":"vehicle/car","value":{"Wheels":4}}
|
||||
// (*Car)(nil) // Output: null
|
||||
// Vehicle(Car{Wheels: 4}) // Output: {"type":"vehicle/car","value":{"Wheels":4}}
|
||||
// Vehicle(nil) // Output: null
|
||||
//
|
||||
// type Struct struct {
|
||||
// Car *Car
|
||||
// Vehicle Vehicle
|
||||
// }
|
||||
//
|
||||
// Struct{Car: &Car{Wheels: 4}, Vehicle: &Car{Wheels: 4}}
|
||||
// // Output: {"Car": {"Wheels: 4"}, "Vehicle": {"type":"vehicle/car","value":{"Wheels":4}}}
|
||||
//
|
||||
package json
|
||||
@@ -1,254 +0,0 @@
|
||||
package json
|
||||
|
||||
import (
|
||||
"bytes"
|
||||
"encoding/json"
|
||||
"errors"
|
||||
"fmt"
|
||||
"io"
|
||||
"reflect"
|
||||
"strconv"
|
||||
"time"
|
||||
)
|
||||
|
||||
var (
|
||||
timeType = reflect.TypeOf(time.Time{})
|
||||
jsonMarshalerType = reflect.TypeOf(new(json.Marshaler)).Elem()
|
||||
jsonUnmarshalerType = reflect.TypeOf(new(json.Unmarshaler)).Elem()
|
||||
)
|
||||
|
||||
// Marshal marshals the value as JSON, using Amino-compatible JSON encoding (strings for
|
||||
// 64-bit numbers, and type wrappers for registered types).
|
||||
func Marshal(v interface{}) ([]byte, error) {
|
||||
buf := new(bytes.Buffer)
|
||||
err := encode(buf, v)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
return buf.Bytes(), nil
|
||||
}
|
||||
|
||||
// MarshalIndent marshals the value as JSON, using the given prefix and indentation.
|
||||
func MarshalIndent(v interface{}, prefix, indent string) ([]byte, error) {
|
||||
bz, err := Marshal(v)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
buf := new(bytes.Buffer)
|
||||
err = json.Indent(buf, bz, prefix, indent)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
return buf.Bytes(), nil
|
||||
}
|
||||
|
||||
func encode(w io.Writer, v interface{}) error {
|
||||
// Bare nil values can't be reflected, so we must handle them here.
|
||||
if v == nil {
|
||||
return writeStr(w, "null")
|
||||
}
|
||||
rv := reflect.ValueOf(v)
|
||||
|
||||
// If this is a registered type, defer to interface encoder regardless of whether the input is
|
||||
// an interface or a bare value. This retains Amino's behavior, but is inconsistent with
|
||||
// behavior in structs where an interface field will get the type wrapper while a bare value
|
||||
// field will not.
|
||||
if typeRegistry.name(rv.Type()) != "" {
|
||||
return encodeReflectInterface(w, rv)
|
||||
}
|
||||
|
||||
return encodeReflect(w, rv)
|
||||
}
|
||||
|
||||
func encodeReflect(w io.Writer, rv reflect.Value) error {
|
||||
if !rv.IsValid() {
|
||||
return errors.New("invalid reflect value")
|
||||
}
|
||||
|
||||
// Recursively dereference if pointer.
|
||||
for rv.Kind() == reflect.Ptr {
|
||||
if rv.IsNil() {
|
||||
return writeStr(w, "null")
|
||||
}
|
||||
rv = rv.Elem()
|
||||
}
|
||||
|
||||
// Convert times to UTC.
|
||||
if rv.Type() == timeType {
|
||||
rv = reflect.ValueOf(rv.Interface().(time.Time).Round(0).UTC())
|
||||
}
|
||||
|
||||
// If the value implements json.Marshaler, defer to stdlib directly. Since we've already
|
||||
// dereferenced, we try implementations with both value receiver and pointer receiver. We must
|
||||
// do this after the time normalization above, and thus after dereferencing.
|
||||
if rv.Type().Implements(jsonMarshalerType) {
|
||||
return encodeStdlib(w, rv.Interface())
|
||||
} else if rv.CanAddr() && rv.Addr().Type().Implements(jsonMarshalerType) {
|
||||
return encodeStdlib(w, rv.Addr().Interface())
|
||||
}
|
||||
|
||||
switch rv.Type().Kind() {
|
||||
// Complex types must be recursively encoded.
|
||||
case reflect.Interface:
|
||||
return encodeReflectInterface(w, rv)
|
||||
|
||||
case reflect.Array, reflect.Slice:
|
||||
return encodeReflectList(w, rv)
|
||||
|
||||
case reflect.Map:
|
||||
return encodeReflectMap(w, rv)
|
||||
|
||||
case reflect.Struct:
|
||||
return encodeReflectStruct(w, rv)
|
||||
|
||||
// 64-bit integers are emitted as strings, to avoid precision problems with e.g.
|
||||
// Javascript which uses 64-bit floats (having 53-bit precision).
|
||||
case reflect.Int64, reflect.Int:
|
||||
return writeStr(w, `"`+strconv.FormatInt(rv.Int(), 10)+`"`)
|
||||
|
||||
case reflect.Uint64, reflect.Uint:
|
||||
return writeStr(w, `"`+strconv.FormatUint(rv.Uint(), 10)+`"`)
|
||||
|
||||
// For everything else, defer to the stdlib encoding/json encoder
|
||||
default:
|
||||
return encodeStdlib(w, rv.Interface())
|
||||
}
|
||||
}
|
||||
|
||||
func encodeReflectList(w io.Writer, rv reflect.Value) error {
|
||||
// Emit nil slices as null.
|
||||
if rv.Kind() == reflect.Slice && rv.IsNil() {
|
||||
return writeStr(w, "null")
|
||||
}
|
||||
|
||||
// Encode byte slices as base64 with the stdlib encoder.
|
||||
if rv.Type().Elem().Kind() == reflect.Uint8 {
|
||||
// Stdlib does not base64-encode byte arrays, only slices, so we copy to slice.
|
||||
if rv.Type().Kind() == reflect.Array {
|
||||
slice := reflect.MakeSlice(reflect.SliceOf(rv.Type().Elem()), rv.Len(), rv.Len())
|
||||
reflect.Copy(slice, rv)
|
||||
rv = slice
|
||||
}
|
||||
return encodeStdlib(w, rv.Interface())
|
||||
}
|
||||
|
||||
// Anything else we recursively encode ourselves.
|
||||
length := rv.Len()
|
||||
if err := writeStr(w, "["); err != nil {
|
||||
return err
|
||||
}
|
||||
for i := 0; i < length; i++ {
|
||||
if err := encodeReflect(w, rv.Index(i)); err != nil {
|
||||
return err
|
||||
}
|
||||
if i < length-1 {
|
||||
if err := writeStr(w, ","); err != nil {
|
||||
return err
|
||||
}
|
||||
}
|
||||
}
|
||||
return writeStr(w, "]")
|
||||
}
|
||||
|
||||
func encodeReflectMap(w io.Writer, rv reflect.Value) error {
|
||||
if rv.Type().Key().Kind() != reflect.String {
|
||||
return errors.New("map key must be string")
|
||||
}
|
||||
|
||||
// nil maps are not emitted as nil, to retain Amino compatibility.
|
||||
|
||||
if err := writeStr(w, "{"); err != nil {
|
||||
return err
|
||||
}
|
||||
writeComma := false
|
||||
for _, keyrv := range rv.MapKeys() {
|
||||
if writeComma {
|
||||
if err := writeStr(w, ","); err != nil {
|
||||
return err
|
||||
}
|
||||
}
|
||||
if err := encodeStdlib(w, keyrv.Interface()); err != nil {
|
||||
return err
|
||||
}
|
||||
if err := writeStr(w, ":"); err != nil {
|
||||
return err
|
||||
}
|
||||
if err := encodeReflect(w, rv.MapIndex(keyrv)); err != nil {
|
||||
return err
|
||||
}
|
||||
writeComma = true
|
||||
}
|
||||
return writeStr(w, "}")
|
||||
}
|
||||
|
||||
func encodeReflectStruct(w io.Writer, rv reflect.Value) error {
|
||||
sInfo := makeStructInfo(rv.Type())
|
||||
if err := writeStr(w, "{"); err != nil {
|
||||
return err
|
||||
}
|
||||
writeComma := false
|
||||
for i, fInfo := range sInfo.fields {
|
||||
frv := rv.Field(i)
|
||||
if fInfo.hidden || (fInfo.omitEmpty && frv.IsZero()) {
|
||||
continue
|
||||
}
|
||||
|
||||
if writeComma {
|
||||
if err := writeStr(w, ","); err != nil {
|
||||
return err
|
||||
}
|
||||
}
|
||||
if err := encodeStdlib(w, fInfo.jsonName); err != nil {
|
||||
return err
|
||||
}
|
||||
if err := writeStr(w, ":"); err != nil {
|
||||
return err
|
||||
}
|
||||
if err := encodeReflect(w, frv); err != nil {
|
||||
return err
|
||||
}
|
||||
writeComma = true
|
||||
}
|
||||
return writeStr(w, "}")
|
||||
}
|
||||
|
||||
func encodeReflectInterface(w io.Writer, rv reflect.Value) error {
|
||||
// Get concrete value and dereference pointers.
|
||||
for rv.Kind() == reflect.Ptr || rv.Kind() == reflect.Interface {
|
||||
if rv.IsNil() {
|
||||
return writeStr(w, "null")
|
||||
}
|
||||
rv = rv.Elem()
|
||||
}
|
||||
|
||||
// Look up the name of the concrete type
|
||||
name := typeRegistry.name(rv.Type())
|
||||
if name == "" {
|
||||
return fmt.Errorf("cannot encode unregistered type %v", rv.Type())
|
||||
}
|
||||
|
||||
// Write value wrapped in interface envelope
|
||||
if err := writeStr(w, fmt.Sprintf(`{"type":%q,"value":`, name)); err != nil {
|
||||
return err
|
||||
}
|
||||
if err := encodeReflect(w, rv); err != nil {
|
||||
return err
|
||||
}
|
||||
return writeStr(w, "}")
|
||||
}
|
||||
|
||||
func encodeStdlib(w io.Writer, v interface{}) error {
|
||||
// Doesn't stream the output because that adds a newline, as per:
|
||||
// https://golang.org/pkg/encoding/json/#Encoder.Encode
|
||||
blob, err := json.Marshal(v)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
_, err = w.Write(blob)
|
||||
return err
|
||||
}
|
||||
|
||||
func writeStr(w io.Writer, s string) error {
|
||||
_, err := w.Write([]byte(s))
|
||||
return err
|
||||
}
|
||||
@@ -1,104 +0,0 @@
|
||||
package json_test
|
||||
|
||||
import (
|
||||
"testing"
|
||||
"time"
|
||||
|
||||
"github.com/stretchr/testify/assert"
|
||||
"github.com/stretchr/testify/require"
|
||||
|
||||
"github.com/tendermint/tendermint/libs/json"
|
||||
)
|
||||
|
||||
func TestMarshal(t *testing.T) {
|
||||
s := "string"
|
||||
sPtr := &s
|
||||
i64 := int64(64)
|
||||
ti := time.Date(2020, 6, 2, 18, 5, 13, 4346374, time.FixedZone("UTC+2", 2*60*60))
|
||||
car := &Car{Wheels: 4}
|
||||
boat := Boat{Sail: true}
|
||||
|
||||
testcases := map[string]struct {
|
||||
value interface{}
|
||||
output string
|
||||
}{
|
||||
"nil": {nil, `null`},
|
||||
"string": {"foo", `"foo"`},
|
||||
"float32": {float32(3.14), `3.14`},
|
||||
"float32 neg": {float32(-3.14), `-3.14`},
|
||||
"float64": {float64(3.14), `3.14`},
|
||||
"float64 neg": {float64(-3.14), `-3.14`},
|
||||
"int32": {int32(32), `32`},
|
||||
"int64": {int64(64), `"64"`},
|
||||
"int64 neg": {int64(-64), `"-64"`},
|
||||
"int64 ptr": {&i64, `"64"`},
|
||||
"uint64": {uint64(64), `"64"`},
|
||||
"time": {ti, `"2020-06-02T16:05:13.004346374Z"`},
|
||||
"time empty": {time.Time{}, `"0001-01-01T00:00:00Z"`},
|
||||
"time ptr": {&ti, `"2020-06-02T16:05:13.004346374Z"`},
|
||||
"customptr": {CustomPtr{Value: "x"}, `{"Value":"x"}`}, // same as encoding/json
|
||||
"customptr ptr": {&CustomPtr{Value: "x"}, `"custom"`},
|
||||
"customvalue": {CustomValue{Value: "x"}, `"custom"`},
|
||||
"customvalue ptr": {&CustomValue{Value: "x"}, `"custom"`},
|
||||
"slice nil": {[]int(nil), `null`},
|
||||
"slice empty": {[]int{}, `[]`},
|
||||
"slice bytes": {[]byte{1, 2, 3}, `"AQID"`},
|
||||
"slice int64": {[]int64{1, 2, 3}, `["1","2","3"]`},
|
||||
"slice int64 ptr": {[]*int64{&i64, nil}, `["64",null]`},
|
||||
"array bytes": {[3]byte{1, 2, 3}, `"AQID"`},
|
||||
"array int64": {[3]int64{1, 2, 3}, `["1","2","3"]`},
|
||||
"map nil": {map[string]int64(nil), `{}`}, // retain Amino compatibility
|
||||
"map empty": {map[string]int64{}, `{}`},
|
||||
"map int64": {map[string]int64{"a": 1, "b": 2, "c": 3}, `{"a":"1","b":"2","c":"3"}`},
|
||||
"car": {car, `{"type":"vehicle/car","value":{"Wheels":4}}`},
|
||||
"car value": {*car, `{"type":"vehicle/car","value":{"Wheels":4}}`},
|
||||
"car iface": {Vehicle(car), `{"type":"vehicle/car","value":{"Wheels":4}}`},
|
||||
"car nil": {(*Car)(nil), `null`},
|
||||
"boat": {boat, `{"type":"vehicle/boat","value":{"Sail":true}}`},
|
||||
"boat ptr": {&boat, `{"type":"vehicle/boat","value":{"Sail":true}}`},
|
||||
"boat iface": {Vehicle(boat), `{"type":"vehicle/boat","value":{"Sail":true}}`},
|
||||
"key public": {PublicKey{1, 2, 3, 4, 5, 6, 7, 8}, `{"type":"key/public","value":"AQIDBAUGBwg="}`},
|
||||
"tags": {
|
||||
Tags{JSONName: "name", OmitEmpty: "foo", Hidden: "bar", Tags: &Tags{JSONName: "child"}},
|
||||
`{"name":"name","OmitEmpty":"foo","tags":{"name":"child"}}`,
|
||||
},
|
||||
"tags empty": {Tags{}, `{"name":""}`},
|
||||
// The encoding of the Car and Boat fields do not have type wrappers, even though they get
|
||||
// type wrappers when encoded directly (see "car" and "boat" tests). This is to retain the
|
||||
// same behavior as Amino. If the field was a Vehicle interface instead, it would get
|
||||
// type wrappers, as seen in the Vehicles field.
|
||||
"struct": {
|
||||
Struct{
|
||||
Bool: true, Float64: 3.14, Int32: 32, Int64: 64, Int64Ptr: &i64,
|
||||
String: "foo", StringPtrPtr: &sPtr, Bytes: []byte{1, 2, 3},
|
||||
Time: ti, Car: car, Boat: boat, Vehicles: []Vehicle{car, boat},
|
||||
Child: &Struct{Bool: false, String: "child"}, private: "private",
|
||||
},
|
||||
`{
|
||||
"Bool":true, "Float64":3.14, "Int32":32, "Int64":"64", "Int64Ptr":"64",
|
||||
"String":"foo", "StringPtrPtr": "string", "Bytes":"AQID",
|
||||
"Time":"2020-06-02T16:05:13.004346374Z",
|
||||
"Car":{"Wheels":4},
|
||||
"Boat":{"Sail":true},
|
||||
"Vehicles":[
|
||||
{"type":"vehicle/car","value":{"Wheels":4}},
|
||||
{"type":"vehicle/boat","value":{"Sail":true}}
|
||||
],
|
||||
"Child":{
|
||||
"Bool":false, "Float64":0, "Int32":0, "Int64":"0", "Int64Ptr":null,
|
||||
"String":"child", "StringPtrPtr":null, "Bytes":null,
|
||||
"Time":"0001-01-01T00:00:00Z",
|
||||
"Car":null, "Boat":{"Sail":false}, "Vehicles":null, "Child":null
|
||||
}
|
||||
}`,
|
||||
},
|
||||
}
|
||||
for name, tc := range testcases {
|
||||
tc := tc
|
||||
t.Run(name, func(t *testing.T) {
|
||||
bz, err := json.Marshal(tc.value)
|
||||
require.NoError(t, err)
|
||||
assert.JSONEq(t, tc.output, string(bz))
|
||||
})
|
||||
}
|
||||
}
|
||||
@@ -1,91 +0,0 @@
|
||||
package json_test
|
||||
|
||||
import (
|
||||
"time"
|
||||
|
||||
"github.com/tendermint/tendermint/libs/json"
|
||||
)
|
||||
|
||||
// Register Car, an instance of the Vehicle interface.
|
||||
func init() {
|
||||
json.RegisterType(&Car{}, "vehicle/car")
|
||||
json.RegisterType(Boat{}, "vehicle/boat")
|
||||
json.RegisterType(PublicKey{}, "key/public")
|
||||
json.RegisterType(PrivateKey{}, "key/private")
|
||||
}
|
||||
|
||||
type Vehicle interface {
|
||||
Drive() error
|
||||
}
|
||||
|
||||
// Car is a pointer implementation of Vehicle.
|
||||
type Car struct {
|
||||
Wheels int32
|
||||
}
|
||||
|
||||
func (c *Car) Drive() error { return nil }
|
||||
|
||||
// Boat is a value implementation of Vehicle.
|
||||
type Boat struct {
|
||||
Sail bool
|
||||
}
|
||||
|
||||
func (b Boat) Drive() error { return nil }
|
||||
|
||||
// These are public and private encryption keys.
|
||||
type PublicKey [8]byte
|
||||
type PrivateKey [8]byte
|
||||
|
||||
// Custom has custom marshalers and unmarshalers, taking pointer receivers.
|
||||
type CustomPtr struct {
|
||||
Value string
|
||||
}
|
||||
|
||||
func (c *CustomPtr) MarshalJSON() ([]byte, error) {
|
||||
return []byte("\"custom\""), nil
|
||||
}
|
||||
|
||||
func (c *CustomPtr) UnmarshalJSON(bz []byte) error {
|
||||
c.Value = "custom"
|
||||
return nil
|
||||
}
|
||||
|
||||
// CustomValue has custom marshalers and unmarshalers, taking value receivers (which usually doesn't
|
||||
// make much sense since the unmarshaler can't change anything).
|
||||
type CustomValue struct {
|
||||
Value string
|
||||
}
|
||||
|
||||
func (c CustomValue) MarshalJSON() ([]byte, error) {
|
||||
return []byte("\"custom\""), nil
|
||||
}
|
||||
|
||||
func (c CustomValue) UnmarshalJSON(bz []byte) error {
|
||||
return nil
|
||||
}
|
||||
|
||||
// Tags tests JSON tags.
|
||||
type Tags struct {
|
||||
JSONName string `json:"name"`
|
||||
OmitEmpty string `json:",omitempty"`
|
||||
Hidden string `json:"-"`
|
||||
Tags *Tags `json:"tags,omitempty"`
|
||||
}
|
||||
|
||||
// Struct tests structs with lots of contents.
|
||||
type Struct struct {
|
||||
Bool bool
|
||||
Float64 float64
|
||||
Int32 int32
|
||||
Int64 int64
|
||||
Int64Ptr *int64
|
||||
String string
|
||||
StringPtrPtr **string
|
||||
Bytes []byte
|
||||
Time time.Time
|
||||
Car *Car
|
||||
Boat Boat
|
||||
Vehicles []Vehicle
|
||||
Child *Struct
|
||||
private string
|
||||
}
|
||||
@@ -1,87 +0,0 @@
|
||||
package json
|
||||
|
||||
import (
|
||||
"fmt"
|
||||
"reflect"
|
||||
"strings"
|
||||
"sync"
|
||||
"unicode"
|
||||
)
|
||||
|
||||
var (
|
||||
// cache caches struct info.
|
||||
cache = newStructInfoCache()
|
||||
)
|
||||
|
||||
// structCache is a cache of struct info.
|
||||
type structInfoCache struct {
|
||||
sync.RWMutex
|
||||
structInfos map[reflect.Type]*structInfo
|
||||
}
|
||||
|
||||
func newStructInfoCache() *structInfoCache {
|
||||
return &structInfoCache{
|
||||
structInfos: make(map[reflect.Type]*structInfo),
|
||||
}
|
||||
}
|
||||
|
||||
func (c *structInfoCache) get(rt reflect.Type) *structInfo {
|
||||
c.RLock()
|
||||
defer c.RUnlock()
|
||||
return c.structInfos[rt]
|
||||
}
|
||||
|
||||
func (c *structInfoCache) set(rt reflect.Type, sInfo *structInfo) {
|
||||
c.Lock()
|
||||
defer c.Unlock()
|
||||
c.structInfos[rt] = sInfo
|
||||
}
|
||||
|
||||
// structInfo contains JSON info for a struct.
|
||||
type structInfo struct {
|
||||
fields []*fieldInfo
|
||||
}
|
||||
|
||||
// fieldInfo contains JSON info for a struct field.
|
||||
type fieldInfo struct {
|
||||
jsonName string
|
||||
omitEmpty bool
|
||||
hidden bool
|
||||
}
|
||||
|
||||
// makeStructInfo generates structInfo for a struct as a reflect.Value.
|
||||
func makeStructInfo(rt reflect.Type) *structInfo {
|
||||
if rt.Kind() != reflect.Struct {
|
||||
panic(fmt.Sprintf("can't make struct info for non-struct value %v", rt))
|
||||
}
|
||||
if sInfo := cache.get(rt); sInfo != nil {
|
||||
return sInfo
|
||||
}
|
||||
fields := make([]*fieldInfo, 0, rt.NumField())
|
||||
for i := 0; i < cap(fields); i++ {
|
||||
frt := rt.Field(i)
|
||||
fInfo := &fieldInfo{
|
||||
jsonName: frt.Name,
|
||||
omitEmpty: false,
|
||||
hidden: frt.Name == "" || !unicode.IsUpper(rune(frt.Name[0])),
|
||||
}
|
||||
o := frt.Tag.Get("json")
|
||||
if o == "-" {
|
||||
fInfo.hidden = true
|
||||
} else if o != "" {
|
||||
opts := strings.Split(o, ",")
|
||||
if opts[0] != "" {
|
||||
fInfo.jsonName = opts[0]
|
||||
}
|
||||
for _, o := range opts[1:] {
|
||||
if o == "omitempty" {
|
||||
fInfo.omitEmpty = true
|
||||
}
|
||||
}
|
||||
}
|
||||
fields = append(fields, fInfo)
|
||||
}
|
||||
sInfo := &structInfo{fields: fields}
|
||||
cache.set(rt, sInfo)
|
||||
return sInfo
|
||||
}
|
||||
@@ -1,108 +0,0 @@
|
||||
package json
|
||||
|
||||
import (
|
||||
"errors"
|
||||
"fmt"
|
||||
"reflect"
|
||||
"sync"
|
||||
)
|
||||
|
||||
var (
|
||||
// typeRegistry contains globally registered types for JSON encoding/decoding.
|
||||
typeRegistry = newTypes()
|
||||
)
|
||||
|
||||
// RegisterType registers a type for Amino-compatible interface encoding in the global type
|
||||
// registry. These types will be encoded with a type wrapper `{"type":"<type>","value":<value>}`
|
||||
// regardless of which interface they are wrapped in (if any). If the type is a pointer, it will
|
||||
// still be valid both for value and pointer types, but decoding into an interface will generate
|
||||
// the a value or pointer based on the registered type.
|
||||
//
|
||||
// Should only be called in init() functions, as it panics on error.
|
||||
func RegisterType(_type interface{}, name string) {
|
||||
if _type == nil {
|
||||
panic("cannot register nil type")
|
||||
}
|
||||
err := typeRegistry.register(name, reflect.ValueOf(_type).Type())
|
||||
if err != nil {
|
||||
panic(err)
|
||||
}
|
||||
}
|
||||
|
||||
// typeInfo contains type information.
|
||||
type typeInfo struct {
|
||||
name string
|
||||
rt reflect.Type
|
||||
returnPtr bool
|
||||
}
|
||||
|
||||
// types is a type registry. It is safe for concurrent use.
|
||||
type types struct {
|
||||
sync.RWMutex
|
||||
byType map[reflect.Type]*typeInfo
|
||||
byName map[string]*typeInfo
|
||||
}
|
||||
|
||||
// newTypes creates a new type registry.
|
||||
func newTypes() types {
|
||||
return types{
|
||||
byType: map[reflect.Type]*typeInfo{},
|
||||
byName: map[string]*typeInfo{},
|
||||
}
|
||||
}
|
||||
|
||||
// registers the given type with the given name. The name and type must not be registered already.
|
||||
func (t *types) register(name string, rt reflect.Type) error {
|
||||
if name == "" {
|
||||
return errors.New("name cannot be empty")
|
||||
}
|
||||
// If this is a pointer type, we recursively resolve until we get a bare type, but register that
|
||||
// we should return pointers.
|
||||
returnPtr := false
|
||||
for rt.Kind() == reflect.Ptr {
|
||||
returnPtr = true
|
||||
rt = rt.Elem()
|
||||
}
|
||||
tInfo := &typeInfo{
|
||||
name: name,
|
||||
rt: rt,
|
||||
returnPtr: returnPtr,
|
||||
}
|
||||
|
||||
t.Lock()
|
||||
defer t.Unlock()
|
||||
if _, ok := t.byName[tInfo.name]; ok {
|
||||
return fmt.Errorf("a type with name %q is already registered", name)
|
||||
}
|
||||
if _, ok := t.byType[tInfo.rt]; ok {
|
||||
return fmt.Errorf("the type %v is already registered", rt)
|
||||
}
|
||||
t.byName[name] = tInfo
|
||||
t.byType[rt] = tInfo
|
||||
return nil
|
||||
}
|
||||
|
||||
// lookup looks up a type from a name, or nil if not registered.
|
||||
func (t *types) lookup(name string) (reflect.Type, bool) {
|
||||
t.RLock()
|
||||
defer t.RUnlock()
|
||||
tInfo := t.byName[name]
|
||||
if tInfo == nil {
|
||||
return nil, false
|
||||
}
|
||||
return tInfo.rt, tInfo.returnPtr
|
||||
}
|
||||
|
||||
// name looks up the name of a type, or empty if not registered. Unwraps pointers as necessary.
|
||||
func (t *types) name(rt reflect.Type) string {
|
||||
for rt.Kind() == reflect.Ptr {
|
||||
rt = rt.Elem()
|
||||
}
|
||||
t.RLock()
|
||||
defer t.RUnlock()
|
||||
tInfo := t.byType[rt]
|
||||
if tInfo == nil {
|
||||
return ""
|
||||
}
|
||||
return tInfo.name
|
||||
}
|
||||
Reference in New Issue
Block a user