fix: check for bad zip files during unzipping in file doctype (#19058) (

#19060)

* check for bad zip files

(cherry picked from commit 5395744)

Co-authored-by: Nikhil <30789322+nk521@users.noreply.github.com>

frappe/core/doctype/file/file.py

@@ -423,7 +423,10 @@ def unzip(self) -> list["File"]:
 					continue
 
 				file_doc = frappe.new_doc("File")
-				file_doc.content = z.read(file.filename)
+				try:
+					file_doc.content = z.read(file.filename)
+				except zipfile.BadZipFile:
+					frappe.throw(_("{0} is a not a valid zip file").format(self.file_name))
 				file_doc.file_name = filename
 				file_doc.folder = self.folder
 				file_doc.is_private = self.is_private