/
pertoken.go
96 lines (80 loc) · 3.05 KB
/
pertoken.go
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package pertoken
import (
"context"
"fmt"
"sync"
"time"
grpcauth "github.com/grpc-ecosystem/go-grpc-middleware/auth"
middleware "github.com/grpc-ecosystem/go-grpc-middleware/v2"
"github.com/rs/zerolog/log"
"google.golang.org/grpc"
"github.com/authzed/spicedb/internal/datastore/memdb"
datastoremw "github.com/authzed/spicedb/internal/middleware/datastore"
"github.com/authzed/spicedb/pkg/datastore"
"github.com/authzed/spicedb/pkg/validationfile"
)
const (
gcWindow = 1 * time.Hour
revisionQuantization = 10 * time.Millisecond
)
// MiddlewareForTesting is used to create a unique datastore for each token. It is intended for use in the
// testserver only.
type MiddlewareForTesting struct {
datastoreByToken *sync.Map
configFilePaths []string
}
// NewMiddleware returns a new per-token datastore middleware that initializes each datastore with the data in the
// config files.
func NewMiddleware(configFilePaths []string) *MiddlewareForTesting {
return &MiddlewareForTesting{
datastoreByToken: &sync.Map{},
configFilePaths: configFilePaths,
}
}
func (m *MiddlewareForTesting) getOrCreateDatastore(ctx context.Context) (datastore.Datastore, error) {
tokenStr, _ := grpcauth.AuthFromMD(ctx, "bearer")
tokenDatastore, ok := m.datastoreByToken.Load(tokenStr)
if ok {
return tokenDatastore.(datastore.Datastore), nil
}
log.Debug().Str("token", tokenStr).Msg("initializing new upstream for token")
ds, err := memdb.NewMemdbDatastore(0, revisionQuantization, gcWindow)
if err != nil {
return nil, fmt.Errorf("failed to init datastore: %w", err)
}
_, _, err = validationfile.PopulateFromFiles(ds, m.configFilePaths)
if err != nil {
return nil, fmt.Errorf("failed to load config files: %w", err)
}
m.datastoreByToken.Store(tokenStr, ds)
return ds, nil
}
// UnaryServerInterceptor returns a new unary server interceptor that sets a separate in-memory datastore per token
func (m *MiddlewareForTesting) UnaryServerInterceptor() grpc.UnaryServerInterceptor {
return func(ctx context.Context, req interface{}, info *grpc.UnaryServerInfo, handler grpc.UnaryHandler) (interface{}, error) {
tokenDatastore, err := m.getOrCreateDatastore(ctx)
if err != nil {
return nil, err
}
newCtx := datastoremw.ContextWithHandle(ctx)
if err := datastoremw.SetInContext(newCtx, tokenDatastore); err != nil {
return nil, err
}
return handler(newCtx, req)
}
}
// StreamServerInterceptor returns a new stream server interceptor that sets a separate in-memory datastore per token
func (m *MiddlewareForTesting) StreamServerInterceptor() grpc.StreamServerInterceptor {
return func(srv interface{}, stream grpc.ServerStream, info *grpc.StreamServerInfo, handler grpc.StreamHandler) error {
tokenDatastore, err := m.getOrCreateDatastore(stream.Context())
if err != nil {
return err
}
wrapped := middleware.WrapServerStream(stream)
wrapped.WrappedContext = datastoremw.ContextWithHandle(wrapped.WrappedContext)
if err := datastoremw.SetInContext(wrapped.WrappedContext, tokenDatastore); err != nil {
return err
}
return handler(srv, wrapped)
}
}