feat(alias): support pass through provider (#1269)

Author: KirCute

drivers/alias/driver.go

@@ -79,21 +79,45 @@ func (d *Alias) Get(ctx context.Context, path string) (model.Obj, error) {
 	if !ok {
 		return nil, errs.ObjectNotFound
 	}
+	var ret *model.Object
+	provider := ""
 	for _, dst := range dsts {
-		obj, err := fs.Get(ctx, stdpath.Join(dst, sub), &fs.GetArgs{NoLog: true})
+		rawPath := stdpath.Join(dst, sub)
+		obj, err := fs.Get(ctx, rawPath, &fs.GetArgs{NoLog: true})
 		if err != nil {
 			continue
 		}
-		return &model.Object{
-			Path:     path,
-			Name:     obj.GetName(),
-			Size:     obj.GetSize(),
-			Modified: obj.ModTime(),
-			IsFolder: obj.IsDir(),
-			HashInfo: obj.GetHash(),
+		storage, err := fs.GetStorage(rawPath, &fs.GetStoragesArgs{})
+		if ret == nil {
+			ret = &model.Object{
+				Path:     path,
+				Name:     obj.GetName(),
+				Size:     obj.GetSize(),
+				Modified: obj.ModTime(),
+				IsFolder: obj.IsDir(),
+				HashInfo: obj.GetHash(),
+			}
+			if !d.ProviderPassThrough || err != nil {
+				break
+			}
+			provider = storage.Config().Name
+		} else if err != nil || provider != storage.GetStorage().Driver {
+			provider = ""
+			break
+		}
+	}
+	if ret == nil {
+		return nil, errs.ObjectNotFound
+	}
+	if provider != "" {
+		return &model.ObjectProvider{
+			Object: *ret,
+			Provider: model.Provider{
+				Provider: provider,
+			},
 		}, nil
 	}
-	return nil, errs.ObjectNotFound
+	return ret, nil
 }
 
 func (d *Alias) List(ctx context.Context, dir model.Obj, args model.ListArgs) ([]model.Obj, error) {
@@ -186,6 +210,35 @@ func (d *Alias) Link(ctx context.Context, file model.Obj, args model.LinkArgs) (
 	return nil, errs.ObjectNotFound
 }
 
+func (d *Alias) Other(ctx context.Context, args model.OtherArgs) (interface{}, error) {
+	root, sub := d.getRootAndPath(args.Obj.GetPath())
+	dsts, ok := d.pathMap[root]
+	if !ok {
+		return nil, errs.ObjectNotFound
+	}
+	for _, dst := range dsts {
+		rawPath := stdpath.Join(dst, sub)
+		storage, actualPath, err := op.GetStorageAndActualPath(rawPath)
+		if err != nil {
+			continue
+		}
+		other, ok := storage.(driver.Other)
+		if !ok {
+			continue
+		}
+		obj, err := op.GetUnwrap(ctx, storage, actualPath)
+		if err != nil {
+			continue
+		}
+		return other.Other(ctx, model.OtherArgs{
+			Obj:    obj,
+			Method: args.Method,
+			Data:   args.Data,
+		})
+	}
+	return nil, errs.NotImplement
+}
+
 func (d *Alias) MakeDir(ctx context.Context, parentDir model.Obj, dirName string) error {
 	if !d.Writable {
 		return errs.PermissionDenied

drivers/alias/meta.go

@@ -15,6 +15,7 @@ type Addition struct {
 	DownloadConcurrency int    `json:"download_concurrency" default:"0" required:"false" type:"number" help:"Need to enable proxy"`
 	DownloadPartSize    int    `json:"download_part_size" default:"0" type:"number" required:"false" help:"Need to enable proxy. Unit: KB"`
 	Writable            bool   `json:"writable" type:"bool" default:"false"`
+	ProviderPassThrough bool   `json:"provider_pass_through" type:"bool" default:"false"`
 }
 
 var config = driver.Config{

internal/model/obj.go

@@ -80,6 +80,10 @@ type SetPath interface {
 	SetPath(path string)
 }
 
+type ObjWithProvider interface {
+	GetProvider() string
+}
+
 func SortFiles(objs []Obj, orderBy, orderDirection string) {
 	if orderBy == "" {
 		return
@@ -166,6 +170,16 @@ func GetUrl(obj Obj) (url string, ok bool) {
 	return url, false
 }
 
+func GetProvider(obj Obj) (string, bool) {
+	if obj, ok := obj.(ObjWithProvider); ok {
+		return obj.GetProvider(), true
+	}
+	if unwrap, ok := obj.(ObjUnwrap); ok {
+		return GetProvider(unwrap.Unwrap())
+	}
+	return "unknown", false
+}
+
 func GetRawObject(obj Obj) *Object {
 	switch v := obj.(type) {
 	case *ObjThumbURL:
@@ -174,6 +188,8 @@ func GetRawObject(obj Obj) *Object {
 		return &v.Object
 	case *ObjectURL:
 		return &v.Object
+	case *ObjectProvider:
+		return &v.Object
 	case *Object:
 		return v
 	}

internal/model/object.go

@@ -99,3 +99,16 @@ type ObjThumbURL struct {
 	Thumbnail
 	Url
 }
+
+type Provider struct {
+	Provider string
+}
+
+func (p Provider) GetProvider() string {
+	return p.Provider
+}
+
+type ObjectProvider struct {
+	Object
+	Provider
+}

server/handles/fsread.go

@@ -301,8 +301,8 @@ func FsGet(c *gin.Context, req *FsGetReq, user *model.User) {
 	var rawURL string
 
 	storage, err := fs.GetStorage(reqPath, &fs.GetStoragesArgs{})
-	provider := "unknown"
-	if err == nil {
+	provider, ok := model.GetProvider(obj)
+	if !ok && err == nil {
 		provider = storage.Config().Name
 	}
 	if !obj.IsDir() {