Marshal / Unmarshal - time.Time to timestamppb

[go-aegian]

when marshalling a time.Time with either timezone info 2024-03-31T15:09:16.822301-04:00 or without it as Z 2024-03-31T20:09:00.034949Z

the unmarshall throws this error "... readObjectStart: expect { or n, but found ", error found in #10 byte of ..."

How can I resolve this without having to create a custom type for time.Time?

[go-aegian]

Here is an example of what I'm facing as problem, some others have said to use protojson to unmarshall into a proto message but that is not what I need.

package main

import (
	"fmt"
	"time"
	
	jsoniter "github.com/json-iterator/go"
	"google.golang.org/protobuf/runtime/protoimpl"
	"google.golang.org/protobuf/types/known/timestamppb"
)

type Test struct {
	Id        string    `json:"id,omitempty"`
	ExpiresOn time.Time `json:"expiresOn,omitempty"`
}

type TestPB struct {
	state         protoimpl.MessageState
	sizeCache     protoimpl.SizeCache
	unknownFields protoimpl.UnknownFields
	Id            string                 `protobuf:"bytes,1,opt,name=id,proto3" json:"id,omitempty"`
	ExpiresOn     *timestamppb.Timestamp `protobuf:"bytes,2,opt,name=expiresOn,proto3" json:"expiresOn,omitempty"`
}

func main() {
	u := Test{Id: "123", ExpiresOn: time.Now()}
	
	b, err := jsoniter.Marshal(u)
	if err != nil {
		panic(err)
	}
	
	var m TestPB
	err = jsoniter.Unmarshal(b, &m)
	if err != nil {
		panic(err)
	}
	
	fmt.Printf("PB is %v", m)
}