Windows Python tempfile permission error fix (#2309)

* Fix PermissionError: [Errno 13] Permission denied
Windows Python tempfile permission error fix

mobsf/StaticAnalyzer/views/android/code_analysis.py

@@ -1,6 +1,7 @@
 # -*- coding: utf_8 -*-
 """Module holding the functions for code analysis."""
 
+import os
 import logging
 import tempfile
 from pathlib import Path
@@ -37,9 +38,11 @@ def get_perm_rules(perm_rules, android_permissions):
                 dynamic_rules.append(p)
         rules = yaml.dump(dynamic_rules)
         if rules:
-            tmp = tempfile.NamedTemporaryFile(mode='w')
+            tmp = tempfile.NamedTemporaryFile(
+                mode='w',
+                delete=False)
             tmp.write(rules)
-            tmp.flush()
+            tmp.close()
             return tmp
     except Exception:
         logger.error('Getting Permission Rules')
@@ -98,7 +101,7 @@ def code_analysis(app_dir, typ, manifest_file, android_permissions):
                 [src],
                 {}))
             logger.info('Android Permission Mapping Completed')
-            rule_file.close()
+            os.unlink(rule_file.name)
         # NIAP Scan
         niap_findings = niap_scan(
             niap_rules.as_posix(),