52 lines
1.2 KiB
Go
52 lines
1.2 KiB
Go
package encoders
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import (
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"github.com/pkg/errors"
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pb "go.unistack.org/unistack-org/pkgdash/proto/go_generate"
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"google.golang.org/protobuf/encoding/protojson"
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"google.golang.org/protobuf/proto"
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"io"
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"net/http"
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)
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var ErrWrongResponseType = errors.New("JSONProto: wrong response message type")
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type JSONProto struct {
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m protojson.MarshalOptions
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}
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func NewJSONProto() *JSONProto {
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return &JSONProto{m: protojson.MarshalOptions{
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EmitUnpopulated: true,
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UseProtoNames: false,
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}}
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}
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func (e *JSONProto) Success(rw http.ResponseWriter, response interface{}) error {
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rw.Header().Set("Content-Type", "application/json; charset=utf-8")
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rw.WriteHeader(http.StatusOK)
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if v, ok := response.(proto.Message); ok {
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return errors.WithStack(e.Fmarshal(rw, v))
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}
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return ErrWrongResponseType
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}
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func (e *JSONProto) Error(rw http.ResponseWriter, err *pb.Error, status int) error {
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rw.Header().Set("Content-Type", "application/problem+json; charset=utf-8")
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rw.WriteHeader(status)
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return errors.WithStack(e.Fmarshal(rw, &pb.ErrorRsp{Error: err}))
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}
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func (e *JSONProto) Fmarshal(w io.Writer, m proto.Message) error {
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b, err := e.m.Marshal(m)
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if len(b) > 0 {
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if _, err = w.Write(b); err != nil {
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return err
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}
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}
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return err
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}
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