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151ef80e28
details: https://pkg.go.dev/encoding/json/v2 --------- Co-authored-by: techknowlogick <matti@mdranta.net> Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>
93 lines
2.9 KiB
Go
93 lines
2.9 KiB
Go
// Copyright 2025 The Gitea Authors. All rights reserved.
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// SPDX-License-Identifier: MIT
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//go:build goexperiment.jsonv2
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package json
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import (
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"bytes"
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jsonv1 "encoding/json" //nolint:depguard // this package wraps it
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jsonv2 "encoding/json/v2" //nolint:depguard // this package wraps it
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"io"
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)
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// JSONv2 implements Interface via encoding/json/v2
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// Requires GOEXPERIMENT=jsonv2 to be set at build time
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type JSONv2 struct {
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marshalOptions jsonv2.Options
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marshalKeepOptionalEmptyOptions jsonv2.Options
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unmarshalOptions jsonv2.Options
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unmarshalCaseInsensitiveOptions jsonv2.Options
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}
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var jsonV2 JSONv2
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func init() {
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commonMarshalOptions := []jsonv2.Options{
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jsonv2.FormatNilSliceAsNull(true),
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jsonv2.FormatNilMapAsNull(true),
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}
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jsonV2.marshalOptions = jsonv2.JoinOptions(commonMarshalOptions...)
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jsonV2.unmarshalOptions = jsonv2.DefaultOptionsV2()
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// By default, "json/v2" omitempty removes all `""` empty strings, no matter where it comes from.
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// v1 has a different behavior: if the `""` is from a null pointer, or a Marshal function, it is kept.
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// Golang issue: https://github.com/golang/go/issues/75623 encoding/json/v2: unable to make omitempty work with pointer or Optional type with goexperiment.jsonv2
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jsonV2.marshalKeepOptionalEmptyOptions = jsonv2.JoinOptions(append(commonMarshalOptions, jsonv1.OmitEmptyWithLegacySemantics(true))...)
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// Some legacy code uses case-insensitive matching (for example: parsing oci.ImageConfig)
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jsonV2.unmarshalCaseInsensitiveOptions = jsonv2.JoinOptions(jsonv2.MatchCaseInsensitiveNames(true))
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}
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func getDefaultJSONHandler() Interface {
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return &jsonV2
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}
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func MarshalKeepOptionalEmpty(v any) ([]byte, error) {
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return jsonv2.Marshal(v, jsonV2.marshalKeepOptionalEmptyOptions)
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}
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func (j *JSONv2) Marshal(v any) ([]byte, error) {
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return jsonv2.Marshal(v, j.marshalOptions)
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}
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func (j *JSONv2) Unmarshal(data []byte, v any) error {
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return jsonv2.Unmarshal(data, v, j.unmarshalOptions)
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}
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func (j *JSONv2) NewEncoder(writer io.Writer) Encoder {
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return &jsonV2Encoder{writer: writer, opts: j.marshalOptions}
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}
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func (j *JSONv2) NewDecoder(reader io.Reader) Decoder {
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return &jsonV2Decoder{reader: reader, opts: j.unmarshalOptions}
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}
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// Indent implements Interface using standard library (JSON v2 doesn't have Indent yet)
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func (*JSONv2) Indent(dst *bytes.Buffer, src []byte, prefix, indent string) error {
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return jsonv1.Indent(dst, src, prefix, indent)
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}
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type jsonV2Encoder struct {
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writer io.Writer
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opts jsonv2.Options
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}
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func (e *jsonV2Encoder) Encode(v any) error {
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return jsonv2.MarshalWrite(e.writer, v, e.opts)
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}
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type jsonV2Decoder struct {
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reader io.Reader
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opts jsonv2.Options
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}
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func (d *jsonV2Decoder) Decode(v any) error {
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return jsonv2.UnmarshalRead(d.reader, v, d.opts)
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}
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func NewDecoderCaseInsensitive(reader io.Reader) Decoder {
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return &jsonV2Decoder{reader: reader, opts: jsonV2.unmarshalCaseInsensitiveOptions}
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}
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