perf: extract fs func and add error log

internal/fs/get.go

@@ -0,0 +1,38 @@
+package fs
+
+import (
+	"context"
+	"github.com/alist-org/alist/v3/internal/model"
+	"github.com/alist-org/alist/v3/internal/operations"
+	"github.com/alist-org/alist/v3/pkg/utils"
+	"github.com/pkg/errors"
+	stdpath "path"
+	"time"
+)
+
+func get(ctx context.Context, path string) (model.Obj, error) {
+	path = utils.StandardizePath(path)
+	// maybe a virtual file
+	if path != "/" {
+		virtualFiles := operations.GetAccountVirtualFilesByPath(stdpath.Dir(path))
+		for _, f := range virtualFiles {
+			if f.GetName() == stdpath.Base(path) {
+				return f, nil
+			}
+		}
+	}
+	account, actualPath, err := operations.GetAccountAndActualPath(path)
+	if err != nil {
+		// if there are no account prefix with path, maybe root folder
+		if path == "/" {
+			return model.Object{
+				Name:     "root",
+				Size:     0,
+				Modified: time.Time{},
+				IsFolder: true,
+			}, nil
+		}
+		return nil, errors.WithMessage(err, "failed get account")
+	}
+	return operations.Get(ctx, account, actualPath)
+}