ms-tester/internal/transport/interceptors.go

package transport

import (
	"context"
	sessionv1 "git.sch9.ru/new_gate/ms-tester/pkg/go/gen/session/v1"
	"google.golang.org/grpc"
	"google.golang.org/grpc/codes"
	"google.golang.org/grpc/status"
)

type ReqWithToken interface {
	GetToken() string
}

func (s *TesterServer) AuthInterceptor() grpc.UnaryServerInterceptor {
	return func(ctx context.Context, req interface{}, info *grpc.UnaryServerInfo, handler grpc.UnaryHandler) (interface{}, error) {
		reqWithToken, ok := req.(ReqWithToken)
		if !ok {
			return nil, status.Errorf(codes.Unauthenticated, "") // FIXME
		}

		token := reqWithToken.GetToken()

		if token == "" {
			return nil, status.Errorf(codes.Unauthenticated, "") // FIXME
		}

		userId, err := s.sessionClient.Read(ctx, &sessionv1.ReadSessionRequest{Token: token})
		if err != nil {
			return nil, status.Errorf(codes.Unauthenticated, "") // FIXME
		}

		ctx = context.WithValue(ctx, "user_id", userId)

		return handler(ctx, req)
	}
}