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jsonpb.marshaler.go
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jsonpb.marshaler.go
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/*
*Copyright (c) 2022, kaydxh
*
*Permission is hereby granted, free of charge, to any person obtaining a copy
*of this software and associated documentation files (the "Software"), to deal
*in the Software without restriction, including without limitation the rights
*to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
*copies of the Software, and to permit persons to whom the Software is
*furnished to do so, subject to the following conditions:
*
*The above copyright notice and this permission notice shall be included in all
*copies or substantial portions of the Software.
*
*THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
*IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
*FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
*AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
*LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
*OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
*SOFTWARE.
*/
package marshaler
import (
"encoding/json"
"fmt"
structpb "github.com/golang/protobuf/ptypes/struct"
"github.com/grpc-ecosystem/grpc-gateway/v2/runtime"
"google.golang.org/protobuf/proto"
)
type JSONPb struct {
runtime.JSONPb
opts struct {
useProtoNames bool
useEnumNumbers bool
emitUnpopulated bool
discardUnknown bool
allowPartial bool
indent string
}
}
func NewDefaultJSONPb() *JSONPb {
return NewJSONPb(
// ummarshal for input
// marshal for output
// use json name
// only for mashaler
WithUseProtoNames(false),
//false means use enum string for output
WithUseEnumNumbers(false),
WithEmitUnpopulated(true),
WithIndent("\t"),
// only for unmarshal
WithDiscardUnknown(true),
// for marshal , unmarshal
WithAllowPartial(true),
)
}
func NewJSONPb(options ...JSONPbOption) *JSONPb {
j := &JSONPb{}
j.ApplyOptions(options...)
if j.opts.useProtoNames {
j.MarshalOptions.UseProtoNames = true
}
if j.opts.useEnumNumbers {
j.MarshalOptions.UseEnumNumbers = true
}
if j.opts.emitUnpopulated {
j.MarshalOptions.EmitUnpopulated = true
}
if j.opts.indent != "" {
j.MarshalOptions.Indent = j.opts.indent
}
if j.opts.allowPartial {
j.MarshalOptions.AllowPartial = true
j.UnmarshalOptions.AllowPartial = true
}
if j.opts.discardUnknown {
j.UnmarshalOptions.DiscardUnknown = true
}
return j
}
func (j *JSONPb) Marshal(v interface{}) ([]byte, error) {
return j.JSONPb.Marshal(v)
}
func (j *JSONPb) MarshaToStructpb(v interface{}) (*structpb.Struct, error) {
var jb []byte
switch v := v.(type) {
case nil:
return &structpb.Struct{}, nil
case *structpb.Struct:
return v, nil
case proto.Message:
data, err := j.JSONPb.Marshal(v)
if err != nil {
return nil, fmt.Errorf("failed to Marshal json: %v", err)
}
jb = []byte(data)
case []byte:
jb = v
case *[]byte:
jb = *v
case string:
jb = []byte(v)
case *string:
jb = []byte(*v)
default:
var err error
jb, err = json.Marshal(v)
if err != nil {
return nil, fmt.Errorf("failed to Marshal json: %v", err)
}
}
var dataStructpb structpb.Struct
if err := j.JSONPb.Unmarshal(jb, &dataStructpb); err != nil {
return nil, err
}
return &dataStructpb, nil
}
/*
// if implemet the function, can parse some field from req data
func (j *JSONPb) NewDecoder(r io.Reader) runtime.Decoder {
return runtime.DecoderFunc(func(v interface{}) error {
rawData, err := ioutil.ReadAll(r)
if err != nil {
return err
}
err = j.JSONPb.Unmarshal(rawData, v)
if err != nil {
return err
}
id := reflect_.RetrieveId(v, reflect_.FieldNameRequestId)
_ = id
return nil
})
}
*/