csv: re-add max filesize check

invenio_previewer/config.py

@@ -21,7 +21,7 @@ PREVIEWER_CHARDET_CONFIDENCE = 0.9
 """Confidence threshold for character encoding detection by `cchardet`."""
 
 PREVIEWER_MAX_FILE_SIZE_BYTES = 1 * 1024 * 1024
-"""Maximum file size in bytes for JSON/XML files."""
+"""Maximum file size in bytes for JSON/XML/CSV files."""
 
 PREVIEWER_MAX_IMAGE_SIZE_BYTES = 0.5 * 1024 * 1024
 """Maximum file size in bytes for image files."""

invenio_previewer/extensions/csv_papaparsejs.py

@@ -15,11 +15,20 @@ from ..proxies import current_previewer
 previewable_extensions = ["csv", "dsv"]
 
 
+def validate_csv(file):
+    """Return dialect information about given csv file."""
+    max_file_size = current_app.config.get(
+        "PREVIEWER_MAX_FILE_SIZE_BYTES", 10 * 1024 * 1024
+    )
+    is_size_valid = file.size <= max_file_size
+    return is_size_valid
+
+
 def can_preview(file):
     """Determine if the given file can be previewed."""
-    if file.is_local() and file.has_extensions(".csv", ".dsv"):
-        return True
-    return False
+    return (
+        file.is_local() and file.has_extensions(".csv", ".dsv") and validate_csv(file)
+    )
 
 
 def preview(file):