Multitenant streams api (#72)

streams/handler/token.go

@@ -4,17 +4,29 @@ import (
 	"context"
 
 	"github.com/google/uuid"
+	"github.com/micro/micro/v3/service/auth"
 	"github.com/micro/micro/v3/service/errors"
 	"github.com/micro/micro/v3/service/logger"
 	pb "github.com/micro/services/streams/proto"
 )
 
 func (s *Streams) Token(ctx context.Context, req *pb.TokenRequest, rsp *pb.TokenResponse) error {
+	acc, ok := auth.AccountFromContext(ctx)
+	if !ok {
+		return errors.Unauthorized("UNAUTHORIZED", "Unauthorized")
+	}
+	if len(req.Topic) > 0 {
+		if err := validateTopicInput(req.Topic); err != nil {
+			return err
+		}
+	}
+
 	// construct the token and write it to the database
 	t := Token{
 		Token:     uuid.New().String(),
 		ExpiresAt: s.Time().Add(TokenTTL),
 		Topic:     req.Topic,
+		Namespace: acc.Issuer,
 	}
 	if err := s.DB.Create(&t).Error; err != nil {
 		logger.Errorf("Error creating token in store: %v", err)