feat(module,blob): implements full api

cmd/cli/command/app/run.go

@@ -15,6 +15,7 @@ import (
 	"forge.cadoles.com/arcad/edge/pkg/module"
 	"forge.cadoles.com/arcad/edge/pkg/module/auth"
 	authHTTP "forge.cadoles.com/arcad/edge/pkg/module/auth/http"
+	"forge.cadoles.com/arcad/edge/pkg/module/blob"
 	"forge.cadoles.com/arcad/edge/pkg/module/cast"
 	"forge.cadoles.com/arcad/edge/pkg/module/net"
 	"forge.cadoles.com/arcad/edge/pkg/storage"
@@ -166,7 +167,7 @@ func getServerModules(bus bus.Bus, ds storage.DocumentStore, bs storage.BlobStor
 		net.ModuleFactory(bus),
 		module.RPCModuleFactory(bus),
 		module.StoreModuleFactory(ds),
-		module.BlobModuleFactory(bus, bs),
+		blob.ModuleFactory(bus, bs),
 		module.Extends(
 			auth.ModuleFactory(
 				auth.WithJWT(dummyKeySet),

doc/apps/server-api/blob.md

@@ -38,11 +38,15 @@ function onBlobDownload(ctx, bucketName, blobId) {
 
 > `TODO`
 
-### `blob.writeBlob(ctx: Context, bucketName: string, blobId: string)`
+### `blob.getBlobInfo(ctx: Context, bucketName: string, blobId: string): BlobInfo`
 
 > `TODO`
 
-### `blob.readBlob(ctx: Context, bucketName: string, blobId: string)`
+### `blob.writeBlob(ctx: Context, bucketName: string, blobId: string, data: any)`
+
+> `TODO`
+
+### `blob.readBlob(ctx: Context, bucketName: string, blobId: string): ArrayBuffer`
 
 > `TODO`
 
@@ -58,7 +62,7 @@ function onBlobDownload(ctx, bucketName, blobId) {
 
 > `TODO`
 
-### `blob.getBlobInfo(ctx: Context, bucketName: string, blobId: string): BlobInfo`
+### `blob.getBucketSize(ctx: Context, bucketName: string): number`
 
 > `TODO`
 
@@ -70,4 +74,16 @@ Voir la documentation de l'objet [`Context`](./context.md#Context).
 
 ### `BlobInfo`
 
+```typescript
+interface BlobInfo {
+    id: string          // Identifiant du blob
+    bucket: string      // Nom du bucket contenant le blob
+    size: number        // Taille du blob
+    modTime: number     // Timestamp Unix de dernière modification du blob
+    contentType: string // Type MIME du contenu du blob
+}
+```
+
 ### `Metadata`
+
+L'objet `Metadata` est un objet clé/valeur arbitraire transmis avec la requête de téléversement. Voir la méthode [`Edge.upload(blob, metadata)`](../client-api/README.md#edge-upload-blob-blob-metadata-object-promise) du SDK client.

pkg/http/blob.go

@@ -11,6 +11,7 @@ import (
 
 	"forge.cadoles.com/arcad/edge/pkg/bus"
 	"forge.cadoles.com/arcad/edge/pkg/module"
+	"forge.cadoles.com/arcad/edge/pkg/module/blob"
 	"forge.cadoles.com/arcad/edge/pkg/storage"
 	"github.com/go-chi/chi/v5"
 	"github.com/pkg/errors"
@@ -68,7 +69,7 @@ func (h *Handler) handleAppUpload(w http.ResponseWriter, r *http.Request) {
 		ContextKeyOriginRequest: r,
 	})
 
-	requestMsg := module.NewMessageUploadRequest(ctx, fileHeader, metadata)
+	requestMsg := blob.NewMessageUploadRequest(ctx, fileHeader, metadata)
 
 	reply, err := h.bus.Request(ctx, requestMsg)
 	if err != nil {
@@ -80,7 +81,7 @@ func (h *Handler) handleAppUpload(w http.ResponseWriter, r *http.Request) {
 
 	logger.Debug(ctx, "upload reply", logger.F("reply", reply))
 
-	responseMsg, ok := reply.(*module.MessageUploadResponse)
+	responseMsg, ok := reply.(*blob.MessageUploadResponse)
 	if !ok {
 		logger.Error(
 			ctx, "unexpected upload response message",
@@ -120,7 +121,7 @@ func (h *Handler) handleAppDownload(w http.ResponseWriter, r *http.Request) {
 		ContextKeyOriginRequest: r,
 	})
 
-	requestMsg := module.NewMessageDownloadRequest(ctx, bucket, storage.BlobID(blobID))
+	requestMsg := blob.NewMessageDownloadRequest(ctx, bucket, storage.BlobID(blobID))
 
 	reply, err := h.bus.Request(ctx, requestMsg)
 	if err != nil {
@@ -130,7 +131,7 @@ func (h *Handler) handleAppDownload(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
-	replyMsg, ok := reply.(*module.MessageDownloadResponse)
+	replyMsg, ok := reply.(*blob.MessageDownloadResponse)
 	if !ok {
 		logger.Error(
 			ctx, "unexpected download response message",

pkg/module/blob.go

@@ -1,282 +0,0 @@
-package module
-
-import (
-	"context"
-	"io"
-	"mime/multipart"
-
-	"forge.cadoles.com/arcad/edge/pkg/app"
-	"forge.cadoles.com/arcad/edge/pkg/bus"
-	"forge.cadoles.com/arcad/edge/pkg/storage"
-	"github.com/dop251/goja"
-	"github.com/pkg/errors"
-	"gitlab.com/wpetit/goweb/logger"
-)
-
-const (
-	DefaultBlobBucket string = "default"
-)
-
-type BlobModule struct {
-	server *app.Server
-	bus    bus.Bus
-	store  storage.BlobStore
-}
-
-func (m *BlobModule) Name() string {
-	return "blob"
-}
-
-func (m *BlobModule) Export(export *goja.Object) {
-}
-
-func (m *BlobModule) handleMessages() {
-	ctx := context.Background()
-
-	go func() {
-		err := m.bus.Reply(ctx, MessageNamespaceUploadRequest, func(msg bus.Message) (bus.Message, error) {
-			uploadRequest, ok := msg.(*MessageUploadRequest)
-			if !ok {
-				return nil, errors.Wrapf(bus.ErrUnexpectedMessage, "expected message upload request, got '%T'", msg)
-			}
-
-			res, err := m.handleUploadRequest(uploadRequest)
-			if err != nil {
-				logger.Error(ctx, "could not handle upload request", logger.E(errors.WithStack(err)))
-
-				return nil, errors.WithStack(err)
-			}
-
-			logger.Debug(ctx, "upload request response", logger.F("response", res))
-
-			return res, nil
-		})
-		if err != nil {
-			panic(errors.WithStack(err))
-		}
-	}()
-
-	err := m.bus.Reply(ctx, MessageNamespaceDownloadRequest, func(msg bus.Message) (bus.Message, error) {
-		downloadRequest, ok := msg.(*MessageDownloadRequest)
-		if !ok {
-			return nil, errors.Wrapf(bus.ErrUnexpectedMessage, "expected message download request, got '%T'", msg)
-		}
-
-		res, err := m.handleDownloadRequest(downloadRequest)
-		if err != nil {
-			logger.Error(ctx, "could not handle download request", logger.E(errors.WithStack(err)))
-
-			return nil, errors.WithStack(err)
-		}
-
-		return res, nil
-	})
-	if err != nil {
-		panic(errors.WithStack(err))
-	}
-}
-
-func (m *BlobModule) handleUploadRequest(req *MessageUploadRequest) (*MessageUploadResponse, error) {
-	blobID := storage.NewBlobID()
-	res := NewMessageUploadResponse(req.RequestID)
-
-	ctx := logger.With(req.Context, logger.F("blobID", blobID))
-
-	blobInfo := map[string]interface{}{
-		"size":        req.FileHeader.Size,
-		"filename":    req.FileHeader.Filename,
-		"contentType": req.FileHeader.Header.Get("Content-Type"),
-	}
-
-	rawResult, err := m.server.ExecFuncByName(ctx, "onBlobUpload", ctx, blobID, blobInfo, req.Metadata)
-	if err != nil {
-		if errors.Is(err, app.ErrFuncDoesNotExist) {
-			res.Allow = false
-
-			return res, nil
-		}
-
-		return nil, errors.WithStack(err)
-	}
-
-	result, ok := rawResult.Export().(map[string]interface{})
-	if !ok {
-		return nil, errors.Errorf(
-			"unexpected onBlobUpload result: expected 'map[string]interface{}', got '%T'",
-			rawResult.Export(),
-		)
-	}
-
-	var allow bool
-
-	rawAllow, exists := result["allow"]
-	if !exists {
-		allow = false
-	} else {
-		allow, ok = rawAllow.(bool)
-		if !ok {
-			return nil, errors.Errorf("invalid 'allow' result property: got type '%T', expected type '%T'", rawAllow, false)
-		}
-	}
-
-	res.Allow = allow
-
-	if res.Allow {
-		bucket := DefaultBlobBucket
-
-		rawBucket, exists := result["bucket"]
-		if exists {
-			bucket, ok = rawBucket.(string)
-			if !ok {
-				return nil, errors.Errorf("invalid 'bucket' result property: got type '%T', expected type '%T'", bucket, "")
-			}
-		}
-
-		if err := m.saveBlob(ctx, bucket, blobID, *req.FileHeader); err != nil {
-			return nil, errors.WithStack(err)
-		}
-
-		res.Bucket = bucket
-		res.BlobID = blobID
-	}
-
-	return res, nil
-}
-
-func (m *BlobModule) saveBlob(ctx context.Context, bucketName string, blobID storage.BlobID, fileHeader multipart.FileHeader) error {
-	file, err := fileHeader.Open()
-	if err != nil {
-		return errors.WithStack(err)
-	}
-
-	defer func() {
-		if err := file.Close(); err != nil {
-			logger.Error(ctx, "could not close file", logger.E(errors.WithStack(err)))
-		}
-	}()
-
-	bucket, err := m.store.OpenBucket(ctx, bucketName)
-	if err != nil {
-		return errors.WithStack(err)
-	}
-
-	defer func() {
-		if err := bucket.Close(); err != nil {
-			logger.Error(ctx, "could not close bucket", logger.E(errors.WithStack(err)))
-		}
-	}()
-
-	writer, err := bucket.NewWriter(ctx, blobID)
-	if err != nil {
-		return errors.WithStack(err)
-	}
-
-	defer func() {
-		if err := file.Close(); err != nil {
-			logger.Error(ctx, "could not close file", logger.E(errors.WithStack(err)))
-		}
-	}()
-
-	defer func() {
-		if err := writer.Close(); err != nil {
-			logger.Error(ctx, "could not close writer", logger.E(errors.WithStack(err)))
-		}
-	}()
-
-	if _, err := io.Copy(writer, file); err != nil {
-		return errors.WithStack(err)
-	}
-
-	return nil
-}
-
-func (m *BlobModule) handleDownloadRequest(req *MessageDownloadRequest) (*MessageDownloadResponse, error) {
-	res := NewMessageDownloadResponse(req.RequestID)
-
-	rawResult, err := m.server.ExecFuncByName(req.Context, "onBlobDownload", req.Context, req.Bucket, req.BlobID)
-	if err != nil {
-		if errors.Is(err, app.ErrFuncDoesNotExist) {
-			res.Allow = false
-
-			return res, nil
-		}
-
-		return nil, errors.WithStack(err)
-	}
-
-	result, ok := rawResult.Export().(map[string]interface{})
-	if !ok {
-		return nil, errors.Errorf(
-			"unexpected onBlobDownload result: expected 'map[string]interface{}', got '%T'",
-			rawResult.Export(),
-		)
-	}
-
-	var allow bool
-
-	rawAllow, exists := result["allow"]
-	if !exists {
-		allow = false
-	} else {
-		allow, ok = rawAllow.(bool)
-		if !ok {
-			return nil, errors.Errorf("invalid 'allow' result property: got type '%T', expected type '%T'", rawAllow, false)
-		}
-	}
-
-	res.Allow = allow
-
-	reader, info, err := m.openBlob(req.Context, req.Bucket, req.BlobID)
-	if err != nil && !errors.Is(err, storage.ErrBlobNotFound) {
-		return nil, errors.WithStack(err)
-	}
-
-	if reader != nil {
-		res.Blob = reader
-	}
-
-	if info != nil {
-		res.BlobInfo = info
-	}
-
-	return res, nil
-}
-
-func (m *BlobModule) openBlob(ctx context.Context, bucketName string, blobID storage.BlobID) (io.ReadSeekCloser, storage.BlobInfo, error) {
-	bucket, err := m.store.OpenBucket(ctx, bucketName)
-	if err != nil {
-		return nil, nil, errors.WithStack(err)
-	}
-
-	defer func() {
-		if err := bucket.Close(); err != nil {
-			logger.Error(ctx, "could not close bucket", logger.E(errors.WithStack(err)), logger.F("bucket", bucket))
-		}
-	}()
-
-	info, err := bucket.Get(ctx, blobID)
-	if err != nil {
-		return nil, nil, errors.WithStack(err)
-	}
-
-	reader, err := bucket.NewReader(ctx, blobID)
-	if err != nil {
-		return nil, nil, errors.WithStack(err)
-	}
-
-	return reader, info, nil
-}
-
-func BlobModuleFactory(bus bus.Bus, store storage.BlobStore) app.ServerModuleFactory {
-	return func(server *app.Server) app.ServerModule {
-		mod := &BlobModule{
-			store:  store,
-			bus:    bus,
-			server: server,
-		}
-
-		go mod.handleMessages()
-
-		return mod
-	}
-}

pkg/module/blob/blob_info.go

@@ -0,0 +1,21 @@
+package blob
+
+import "forge.cadoles.com/arcad/edge/pkg/storage"
+
+type blobInfo struct {
+	ID          storage.BlobID `goja:"id"`
+	Bucket      string         `goja:"bucket"`
+	ModTime     int64          `goja:"modTime"`
+	Size        int64          `goja:"size"`
+	ContentType string         `goja:"contentType"`
+}
+
+func toGojaBlobInfo(blob storage.BlobInfo) blobInfo {
+	return blobInfo{
+		ID:          blob.ID(),
+		Bucket:      blob.Bucket(),
+		ModTime:     blob.ModTime().Unix(),
+		Size:        blob.Size(),
+		ContentType: blob.ContentType(),
+	}
+}

pkg/module/blob/blob_message.go

@@ -1,4 +1,4 @@
-package module
+package blob
 
 import (
 	"context"

pkg/module/blob/module.go

@@ -0,0 +1,499 @@
+package blob
+
+import (
+	"context"
+	"fmt"
+	"io"
+	"mime/multipart"
+	"os"
+	"sort"
+
+	"forge.cadoles.com/arcad/edge/pkg/app"
+	"forge.cadoles.com/arcad/edge/pkg/bus"
+	"forge.cadoles.com/arcad/edge/pkg/module/util"
+	"forge.cadoles.com/arcad/edge/pkg/storage"
+	"github.com/dop251/goja"
+	"github.com/pkg/errors"
+	"gitlab.com/wpetit/goweb/logger"
+)
+
+const (
+	DefaultBlobBucket string = "default"
+)
+
+type Module struct {
+	server *app.Server
+	bus    bus.Bus
+	store  storage.BlobStore
+}
+
+func (m *Module) Name() string {
+	return "blob"
+}
+
+func (m *Module) Export(export *goja.Object) {
+	funcs := map[string]any{
+		"listBuckets":   m.listBuckets,
+		"deleteBucket":  m.deleteBucket,
+		"getBucketSize": m.getBucketSize,
+		"listBlobs":     m.listBlobs,
+		"getBlobInfo":   m.getBlobInfo,
+		"readBlob":      m.readBlob,
+		"writeBlob":     m.writeBlob,
+		"deleteBlob":    m.deleteBlob,
+	}
+
+	for name, fn := range funcs {
+		if err := export.Set(name, fn); err != nil {
+			panic(errors.Wrapf(err, "could not set '%s' function", name))
+		}
+	}
+
+	if err := export.Set("DEFAULT_BUCKET", DefaultBlobBucket); err != nil {
+		panic(errors.Wrap(err, "could not set 'DEFAULT_BUCKET' property"))
+	}
+}
+
+func (m *Module) listBuckets(call goja.FunctionCall, rt *goja.Runtime) goja.Value {
+	ctx := util.AssertContext(call.Argument(0), rt)
+
+	buckets, err := m.store.ListBuckets(ctx)
+	if err != nil {
+		panic(rt.ToValue(errors.WithStack(err)))
+	}
+
+	defaultBucketIndex := sort.SearchStrings(buckets, DefaultBlobBucket)
+	if defaultBucketIndex == 0 {
+		buckets = append(buckets, DefaultBlobBucket)
+	} else {
+		buckets[defaultBucketIndex] = DefaultBlobBucket
+	}
+
+	return rt.ToValue(buckets)
+}
+
+func (m *Module) writeBlob(call goja.FunctionCall, rt *goja.Runtime) goja.Value {
+	ctx := util.AssertContext(call.Argument(0), rt)
+	bucketName := util.AssertString(call.Argument(1), rt)
+	blobID := assertBlobID(call.Argument(2), rt)
+	rawData := call.Argument(3).Export()
+
+	var data []byte
+	switch typ := rawData.(type) {
+	case []byte:
+		data = typ
+	case string:
+		data = []byte(typ)
+	default:
+		data = []byte(fmt.Sprintf("%v", typ))
+	}
+
+	bucket, err := m.store.OpenBucket(ctx, bucketName)
+	if err != nil {
+		panic(rt.ToValue(errors.WithStack(err)))
+	}
+
+	defer func() {
+		if err := bucket.Close(); err != nil {
+			logger.Error(ctx, "could not close bucket", logger.E(errors.WithStack(err)))
+		}
+	}()
+
+	writer, err := bucket.NewWriter(ctx, blobID)
+	if err != nil {
+		panic(rt.ToValue(errors.WithStack(err)))
+	}
+
+	defer func() {
+		if err := writer.Close(); err != nil && !errors.Is(err, os.ErrClosed) {
+			logger.Error(ctx, "could not close blob writer", logger.E(errors.WithStack(err)))
+		}
+	}()
+
+	if _, err := writer.Write(data); err != nil {
+		panic(rt.ToValue(errors.WithStack(err)))
+	}
+
+	return nil
+}
+
+func (m *Module) getBlobInfo(call goja.FunctionCall, rt *goja.Runtime) goja.Value {
+	ctx := util.AssertContext(call.Argument(0), rt)
+	bucketName := util.AssertString(call.Argument(1), rt)
+	blobID := assertBlobID(call.Argument(2), rt)
+
+	bucket, err := m.store.OpenBucket(ctx, bucketName)
+	if err != nil {
+		panic(rt.ToValue(errors.WithStack(err)))
+	}
+
+	defer func() {
+		if err := bucket.Close(); err != nil {
+			logger.Error(ctx, "could not close bucket", logger.E(errors.WithStack(err)))
+		}
+	}()
+
+	blobInfo, err := bucket.Get(ctx, blobID)
+	if err != nil {
+		panic(rt.ToValue(errors.WithStack(err)))
+	}
+
+	return rt.ToValue(toGojaBlobInfo(blobInfo))
+}
+
+func (m *Module) readBlob(call goja.FunctionCall, rt *goja.Runtime) goja.Value {
+	ctx := util.AssertContext(call.Argument(0), rt)
+	bucketName := util.AssertString(call.Argument(1), rt)
+	blobID := assertBlobID(call.Argument(2), rt)
+
+	reader, _, err := m.openBlob(ctx, bucketName, blobID)
+	if err != nil {
+		panic(rt.ToValue(errors.WithStack(err)))
+	}
+
+	defer func() {
+		if err := reader.Close(); err != nil && !errors.Is(err, os.ErrClosed) {
+			logger.Error(ctx, "could not close blob reader", logger.E(errors.WithStack(err)))
+		}
+	}()
+
+	data, err := io.ReadAll(reader)
+	if err != nil {
+		panic(rt.ToValue(errors.WithStack(err)))
+	}
+
+	return rt.ToValue(rt.NewArrayBuffer(data))
+}
+
+func (m *Module) deleteBlob(call goja.FunctionCall, rt *goja.Runtime) goja.Value {
+	ctx := util.AssertContext(call.Argument(0), rt)
+	bucketName := util.AssertString(call.Argument(1), rt)
+	blobID := assertBlobID(call.Argument(2), rt)
+
+	bucket, err := m.store.OpenBucket(ctx, bucketName)
+	if err != nil {
+		panic(rt.ToValue(errors.WithStack(err)))
+	}
+
+	if err := bucket.Delete(ctx, blobID); err != nil {
+		panic(rt.ToValue(errors.WithStack(err)))
+	}
+
+	return nil
+}
+
+func (m *Module) listBlobs(call goja.FunctionCall, rt *goja.Runtime) goja.Value {
+	ctx := util.AssertContext(call.Argument(0), rt)
+	bucketName := util.AssertString(call.Argument(1), rt)
+
+	bucket, err := m.store.OpenBucket(ctx, bucketName)
+	if err != nil {
+		panic(rt.ToValue(errors.WithStack(err)))
+	}
+
+	blobInfos, err := bucket.List(ctx)
+	if err != nil {
+		panic(rt.ToValue(errors.WithStack(err)))
+	}
+
+	gojaBlobInfos := make([]blobInfo, len(blobInfos))
+
+	for i, b := range blobInfos {
+		gojaBlobInfos[i] = toGojaBlobInfo(b)
+	}
+
+	return rt.ToValue(gojaBlobInfos)
+}
+
+func (m *Module) deleteBucket(call goja.FunctionCall, rt *goja.Runtime) goja.Value {
+	ctx := util.AssertContext(call.Argument(0), rt)
+	bucketName := util.AssertString(call.Argument(1), rt)
+
+	if err := m.store.DeleteBucket(ctx, bucketName); err != nil {
+		panic(rt.ToValue(errors.WithStack(err)))
+	}
+
+	return nil
+}
+
+func (m *Module) getBucketSize(call goja.FunctionCall, rt *goja.Runtime) goja.Value {
+	ctx := util.AssertContext(call.Argument(0), rt)
+	bucketName := util.AssertString(call.Argument(1), rt)
+
+	bucket, err := m.store.OpenBucket(ctx, bucketName)
+	if err != nil {
+		panic(rt.ToValue(errors.WithStack(err)))
+	}
+
+	size, err := bucket.Size(ctx)
+	if err != nil {
+		panic(rt.ToValue(errors.WithStack(err)))
+	}
+
+	return rt.ToValue(size)
+}
+
+func (m *Module) handleMessages() {
+	ctx := context.Background()
+
+	go func() {
+		err := m.bus.Reply(ctx, MessageNamespaceUploadRequest, func(msg bus.Message) (bus.Message, error) {
+			uploadRequest, ok := msg.(*MessageUploadRequest)
+			if !ok {
+				return nil, errors.Wrapf(bus.ErrUnexpectedMessage, "expected message upload request, got '%T'", msg)
+			}
+
+			res, err := m.handleUploadRequest(uploadRequest)
+			if err != nil {
+				logger.Error(ctx, "could not handle upload request", logger.E(errors.WithStack(err)))
+
+				return nil, errors.WithStack(err)
+			}
+
+			logger.Debug(ctx, "upload request response", logger.F("response", res))
+
+			return res, nil
+		})
+		if err != nil {
+			panic(errors.WithStack(err))
+		}
+	}()
+
+	err := m.bus.Reply(ctx, MessageNamespaceDownloadRequest, func(msg bus.Message) (bus.Message, error) {
+		downloadRequest, ok := msg.(*MessageDownloadRequest)
+		if !ok {
+			return nil, errors.Wrapf(bus.ErrUnexpectedMessage, "expected message download request, got '%T'", msg)
+		}
+
+		res, err := m.handleDownloadRequest(downloadRequest)
+		if err != nil {
+			logger.Error(ctx, "could not handle download request", logger.E(errors.WithStack(err)))
+
+			return nil, errors.WithStack(err)
+		}
+
+		return res, nil
+	})
+	if err != nil {
+		panic(errors.WithStack(err))
+	}
+}
+
+func (m *Module) handleUploadRequest(req *MessageUploadRequest) (*MessageUploadResponse, error) {
+	blobID := storage.NewBlobID()
+	res := NewMessageUploadResponse(req.RequestID)
+
+	ctx := logger.With(req.Context, logger.F("blobID", blobID))
+
+	blobInfo := map[string]interface{}{
+		"size":        req.FileHeader.Size,
+		"filename":    req.FileHeader.Filename,
+		"contentType": req.FileHeader.Header.Get("Content-Type"),
+	}
+
+	rawResult, err := m.server.ExecFuncByName(ctx, "onBlobUpload", ctx, blobID, blobInfo, req.Metadata)
+	if err != nil {
+		if errors.Is(err, app.ErrFuncDoesNotExist) {
+			res.Allow = false
+
+			return res, nil
+		}
+
+		return nil, errors.WithStack(err)
+	}
+
+	result, ok := rawResult.Export().(map[string]interface{})
+	if !ok {
+		return nil, errors.Errorf(
+			"unexpected onBlobUpload result: expected 'map[string]interface{}', got '%T'",
+			rawResult.Export(),
+		)
+	}
+
+	var allow bool
+
+	rawAllow, exists := result["allow"]
+	if !exists {
+		allow = false
+	} else {
+		allow, ok = rawAllow.(bool)
+		if !ok {
+			return nil, errors.Errorf("invalid 'allow' result property: got type '%T', expected type '%T'", rawAllow, false)
+		}
+	}
+
+	res.Allow = allow
+
+	if res.Allow {
+		bucket := DefaultBlobBucket
+
+		rawBucket, exists := result["bucket"]
+		if exists {
+			bucket, ok = rawBucket.(string)
+			if !ok {
+				return nil, errors.Errorf("invalid 'bucket' result property: got type '%T', expected type '%T'", bucket, "")
+			}
+		}
+
+		if err := m.saveBlob(ctx, bucket, blobID, *req.FileHeader); err != nil {
+			return nil, errors.WithStack(err)
+		}
+
+		res.Bucket = bucket
+		res.BlobID = blobID
+	}
+
+	return res, nil
+}
+
+func (m *Module) saveBlob(ctx context.Context, bucketName string, blobID storage.BlobID, fileHeader multipart.FileHeader) error {
+	file, err := fileHeader.Open()
+	if err != nil {
+		return errors.WithStack(err)
+	}
+
+	defer func() {
+		if err := file.Close(); err != nil {
+			logger.Error(ctx, "could not close file", logger.E(errors.WithStack(err)))
+		}
+	}()
+
+	bucket, err := m.store.OpenBucket(ctx, bucketName)
+	if err != nil {
+		return errors.WithStack(err)
+	}
+
+	defer func() {
+		if err := bucket.Close(); err != nil {
+			logger.Error(ctx, "could not close bucket", logger.E(errors.WithStack(err)))
+		}
+	}()
+
+	writer, err := bucket.NewWriter(ctx, blobID)
+	if err != nil {
+		return errors.WithStack(err)
+	}
+
+	defer func() {
+		if err := file.Close(); err != nil {
+			logger.Error(ctx, "could not close file", logger.E(errors.WithStack(err)))
+		}
+	}()
+
+	defer func() {
+		if err := writer.Close(); err != nil {
+			logger.Error(ctx, "could not close writer", logger.E(errors.WithStack(err)))
+		}
+	}()
+
+	if _, err := io.Copy(writer, file); err != nil {
+		return errors.WithStack(err)
+	}
+
+	return nil
+}
+
+func (m *Module) handleDownloadRequest(req *MessageDownloadRequest) (*MessageDownloadResponse, error) {
+	res := NewMessageDownloadResponse(req.RequestID)
+
+	rawResult, err := m.server.ExecFuncByName(req.Context, "onBlobDownload", req.Context, req.Bucket, req.BlobID)
+	if err != nil {
+		if errors.Is(err, app.ErrFuncDoesNotExist) {
+			res.Allow = false
+
+			return res, nil
+		}
+
+		return nil, errors.WithStack(err)
+	}
+
+	result, ok := rawResult.Export().(map[string]interface{})
+	if !ok {
+		return nil, errors.Errorf(
+			"unexpected onBlobDownload result: expected 'map[string]interface{}', got '%T'",
+			rawResult.Export(),
+		)
+	}
+
+	var allow bool
+
+	rawAllow, exists := result["allow"]
+	if !exists {
+		allow = false
+	} else {
+		allow, ok = rawAllow.(bool)
+		if !ok {
+			return nil, errors.Errorf("invalid 'allow' result property: got type '%T', expected type '%T'", rawAllow, false)
+		}
+	}
+
+	res.Allow = allow
+
+	reader, info, err := m.openBlob(req.Context, req.Bucket, req.BlobID)
+	if err != nil && !errors.Is(err, storage.ErrBlobNotFound) {
+		return nil, errors.WithStack(err)
+	}
+
+	if reader != nil {
+		res.Blob = reader
+	}
+
+	if info != nil {
+		res.BlobInfo = info
+	}
+
+	return res, nil
+}
+
+func (m *Module) openBlob(ctx context.Context, bucketName string, blobID storage.BlobID) (io.ReadSeekCloser, storage.BlobInfo, error) {
+	bucket, err := m.store.OpenBucket(ctx, bucketName)
+	if err != nil {
+		return nil, nil, errors.WithStack(err)
+	}
+
+	defer func() {
+		if err := bucket.Close(); err != nil {
+			logger.Error(ctx, "could not close bucket", logger.E(errors.WithStack(err)), logger.F("bucket", bucket))
+		}
+	}()
+
+	info, err := bucket.Get(ctx, blobID)
+	if err != nil {
+		return nil, nil, errors.WithStack(err)
+	}
+
+	reader, err := bucket.NewReader(ctx, blobID)
+	if err != nil {
+		return nil, nil, errors.WithStack(err)
+	}
+
+	return reader, info, nil
+}
+
+func ModuleFactory(bus bus.Bus, store storage.BlobStore) app.ServerModuleFactory {
+	return func(server *app.Server) app.ServerModule {
+		mod := &Module{
+			store:  store,
+			bus:    bus,
+			server: server,
+		}
+
+		go mod.handleMessages()
+
+		return mod
+	}
+}
+
+func assertBlobID(value goja.Value, rt *goja.Runtime) storage.BlobID {
+	blobID, ok := value.Export().(storage.BlobID)
+	if !ok {
+		rawBlobID, ok := value.Export().(string)
+		if !ok {
+			panic(rt.NewTypeError(fmt.Sprintf("blob id  must be a blob or a string, got '%T'", value.Export())))
+		}
+
+		blobID = storage.BlobID(rawBlobID)
+	}
+
+	return blobID
+}

pkg/module/blob/module_test.go

@@ -0,0 +1,44 @@
+package blob
+
+import (
+	"io/ioutil"
+	"testing"
+
+	"cdr.dev/slog"
+	"forge.cadoles.com/arcad/edge/pkg/app"
+	"forge.cadoles.com/arcad/edge/pkg/bus/memory"
+	"forge.cadoles.com/arcad/edge/pkg/module"
+	"forge.cadoles.com/arcad/edge/pkg/storage/sqlite"
+	"github.com/pkg/errors"
+	"gitlab.com/wpetit/goweb/logger"
+)
+
+func TestBlobModule(t *testing.T) {
+	t.Parallel()
+
+	logger.SetLevel(slog.LevelDebug)
+
+	bus := memory.NewBus()
+	store := sqlite.NewBlobStore(":memory:")
+
+	server := app.NewServer(
+		module.ContextModuleFactory(),
+		module.ConsoleModuleFactory(),
+		ModuleFactory(bus, store),
+	)
+
+	data, err := ioutil.ReadFile("testdata/blob.js")
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	if err := server.Load("testdata/blob.js", string(data)); err != nil {
+		t.Fatal(err)
+	}
+
+	defer server.Stop()
+
+	if err := server.Start(); err != nil {
+		t.Fatalf("%+v", errors.WithStack(err))
+	}
+}

pkg/module/blob/testdata/blob.js

@@ -0,0 +1,79 @@
+
+var ctx = context.new();
+var buckets = blob.listBuckets(ctx);
+
+if (!buckets || buckets.length === 0) {
+    throw new Error("buckets should not be empty");
+}
+
+var size = blob.getBucketSize(ctx, blob.DEFAULT_BUCKET);
+
+if (size !== 0) {
+    throw new Error("bucket size: expected '0', got '"+size+"'");
+}
+
+var newBucket = "mybucket"
+var blobId = "foo"
+var data = (new Date()).toString();
+
+blob.writeBlob(ctx, newBucket, blobId, data)
+
+buckets = blob.listBuckets(ctx);
+
+if (buckets.length !== 2) {
+    throw new Error("buckets.length: expected '2', got '"+buckets.length+"'");
+}
+
+size = blob.getBucketSize(ctx, newBucket);
+
+if (size !== data.length) {
+    throw new Error("bucket size: expected '"+data.length+"', got '"+size+"'");
+}
+
+var blobInfos = blob.listBlobs(ctx, newBucket);
+
+if (blobInfos.length !== 1) {
+    throw new Error("blobInfos.length: expected '1', got '"+blobInfos.length+"'");
+}
+
+if (blobInfos[0].id != blobId) {
+    throw new Error("blobInfos[0].id: expected '"+blobId+"', got '"+blobInfos[0].id+"'");
+}
+
+if (blobInfos[0].contentType != "text/plain; charset=utf-8") {
+    throw new Error("blobInfos[0].contentType: expected 'text/plain; charset=utf-8', got '"+blobInfos[0].contentType+"'");
+}
+
+if (blobInfos[0].size != data.length) {
+    throw new Error("blobInfos[0].size: expected '"+data.length+"', got '"+blobInfos[0].size+"'");
+}
+
+var readData = blob.readBlob(ctx, newBucket, blobId)
+
+if (!readData) {
+    throw new Error("readData should not be nil");
+}
+
+var buckets = blob.listBuckets(ctx);
+
+if (!buckets || buckets.length !== 2) {
+    throw new Error("buckets.length should be 2");
+}
+
+blob.deleteBlob(ctx, newBucket, blobId)
+
+blobInfos = blob.listBlobs(ctx, newBucket);
+
+console.log(blobInfos);
+
+if (blobInfos.length !== 0) {
+    throw new Error("blobInfos.length: expected '0', got '"+blobInfos.length+"'");
+}
+
+blob.deleteBucket(ctx, newBucket)
+
+buckets = blob.listBuckets(ctx);
+
+if (buckets.length !== 1) {
+    throw new Error("buckets.length: expected '1', got '"+buckets.length+"'");
+}

pkg/module/util/assert.go

@@ -12,7 +12,7 @@ func AssertType[T any](v goja.Value, rt *goja.Runtime) T {
 		return c
 	}
 
-	panic(rt.ToValue(errors.Errorf("expected value to be a '%T', got '%T'", *new(T), v.Export())))
+	panic(rt.ToValue(errors.Errorf("expected value to be a '%T', got '%T'", new(T), v.Export())))
 }
 
 func AssertContext(v goja.Value, r *goja.Runtime) context.Context {

pkg/storage/sqlite/blob_bucket.go

@@ -68,8 +68,11 @@ func (b *BlobBucket) Close() error {
 func (b *BlobBucket) Delete(ctx context.Context, id storage.BlobID) error {
 	err := b.withTx(ctx, func(tx *sql.Tx) error {
 		query := `DELETE FROM blobs WHERE bucket = $1 AND id = $2`
+		args := []any{b.name, id}
 
-		if _, err := tx.ExecContext(ctx, query, b.name, id); err != nil {
+		logger.Debug(ctx, "executing query", logger.F("query", query), logger.F("args", args))
+
+		if _, err := tx.ExecContext(ctx, query, args...); err != nil {
 			return errors.WithStack(err)
 		}
 
@@ -88,7 +91,11 @@ func (b *BlobBucket) Get(ctx context.Context, id storage.BlobID) (storage.BlobIn
 
 	err := b.withTx(ctx, func(tx *sql.Tx) error {
 		query := `SELECT content_type, mod_time, size FROM blobs WHERE bucket = $1 AND id = $2`
-		row := tx.QueryRowContext(ctx, query, b.name, id)
+		args := []any{b.name, id}
+
+		logger.Debug(ctx, "executing query", logger.F("query", query), logger.F("args", args))
+
+		row := tx.QueryRowContext(ctx, query, args...)
 
 		var (
 			contentType string
@@ -127,8 +134,11 @@ func (b *BlobBucket) List(ctx context.Context) ([]storage.BlobInfo, error) {
 
 	err := b.withTx(ctx, func(tx *sql.Tx) error {
 		query := `SELECT id, content_type, mod_time, size FROM blobs WHERE bucket = $1`
+		args := []any{b.name}
 
-		rows, err := tx.QueryContext(ctx, query, b.name)
+		logger.Debug(ctx, "executing query", logger.F("query", query), logger.F("args", args))
+
+		rows, err := tx.QueryContext(ctx, query, args...)
 		if err != nil {
 			return errors.WithStack(err)
 		}
@@ -229,7 +239,12 @@ type blobWriterCloser struct {
 
 // Write implements io.WriteCloser
 func (wbc *blobWriterCloser) Write(p []byte) (int, error) {
-	logger.Debug(context.Background(), "writing data to blob", logger.F("data", p))
+	logger.Debug(
+		context.Background(), "writing data to blob",
+		logger.F("size", len(p)),
+		logger.F("blobID", wbc.id),
+		logger.F("bucket", wbc.bucket),
+	)
 
 	n, err := wbc.buf.Write(p)
 	if err != nil {
@@ -266,14 +281,20 @@ func (wbc *blobWriterCloser) Close() error {
 		mime := mimetype.Detect(data)
 		modTime := time.Now().UTC()
 
-		_, err := tx.Exec(
+		args := []any{
-			query,
 			wbc.bucket,
 			wbc.id,
 			data,
 			mime.String(),
 			modTime,
 			len(data),
+		}
+
+		logger.Debug(ctx, "executing query", logger.F("query", query))
+
+		_, err := tx.Exec(
+			query,
+			args...,
 		)
 		if err != nil {
 			return errors.WithStack(err)

pkg/storage/sqlite/blob_store.go

@@ -36,7 +36,7 @@ func (s *BlobStore) ListBuckets(ctx context.Context) ([]string, error) {
 	buckets := make([]string, 0)
 
 	err := s.withTx(ctx, func(tx *sql.Tx) error {
-		query := `SELECT DISTINCT name FROM blobs`
+		query := `SELECT DISTINCT bucket FROM blobs`
 		rows, err := tx.QueryContext(ctx, query)
 		if err != nil {
 			return errors.WithStack(err)