forked from TrueCloudLab/frostfs-node
6b4fb3a0aa
Replace UnaryHandler from structure to method arguments in order to reuse single instance for different service methods. Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
55 lines
1.4 KiB
Go
55 lines
1.4 KiB
Go
package util
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import (
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"context"
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"crypto/ecdsa"
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"github.com/nspcc-dev/neofs-api-go/v2/signature"
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"github.com/pkg/errors"
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)
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type UnaryHandler func(context.Context, interface{}) (interface{}, error)
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type UnarySignService struct {
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key *ecdsa.PrivateKey
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}
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func NewUnarySignService(key *ecdsa.PrivateKey) *UnarySignService {
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return &UnarySignService{
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key: key,
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}
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}
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func (s *UnarySignService) HandleServerStreamRequest(ctx context.Context, req interface{}, handler UnaryHandler) (interface{}, error) {
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return s.verifyAndProc(ctx, req, handler)
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}
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func (s *UnarySignService) HandleUnaryRequest(ctx context.Context, req interface{}, handler UnaryHandler) (interface{}, error) {
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// verify and process request
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resp, err := s.verifyAndProc(ctx, req, handler)
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if err != nil {
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return nil, err
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}
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// sign the response
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if err := signature.SignServiceMessage(s.key, resp); err != nil {
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return nil, errors.Wrap(err, "could not sign response")
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}
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return resp, nil
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}
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func (s *UnarySignService) verifyAndProc(ctx context.Context, req interface{}, handler UnaryHandler) (interface{}, error) {
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// verify request signatures
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if err := signature.VerifyServiceMessage(req); err != nil {
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return nil, errors.Wrap(err, "could not verify request")
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}
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// process request
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resp, err := handler(ctx, req)
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if err != nil {
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return nil, errors.Wrap(err, "could not handle request")
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}
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return resp, nil
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}
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