xml: ensure the stream object is closed in main() (#9695)

* ensure the stream object is closed in main()

* add changelog frag

* Update plugins/modules/xml.py

Co-authored-by: Felix Fontein <felix@fontein.de>

* Update plugins/modules/xml.py

Co-authored-by: Felix Fontein <felix@fontein.de>

---------

Co-authored-by: Felix Fontein <felix@fontein.de>

changelogs/fragments/9695-xml-close-file.yml

@@ -0,0 +1,2 @@
+bugfixes:
+  - xml - ensure file descriptor is closed (https://github.com/ansible-collections/community.general/pull/9695).

plugins/modules/xml.py

@@ -920,29 +920,34 @@ def main():
     elif LooseVersion('.'.join(to_native(f) for f in etree.LXML_VERSION)) < LooseVersion('3.0.0'):
         module.warn('Using lxml version lower than 3.0.0 does not guarantee predictable element attribute order.')
 
-    # Check if the file exists
+    infile = None
-    if xml_string:
-        infile = BytesIO(to_bytes(xml_string, errors='surrogate_or_strict'))
-    elif os.path.isfile(xml_file):
-        infile = open(xml_file, 'rb')
-    else:
-        module.fail_json(msg="The target XML source '%s' does not exist." % xml_file)
-
-    # Parse and evaluate xpath expression
-    if xpath is not None:
-        try:
-            etree.XPath(xpath)
-        except etree.XPathSyntaxError as e:
-            module.fail_json(msg="Syntax error in xpath expression: %s (%s)" % (xpath, e))
-        except etree.XPathEvalError as e:
-            module.fail_json(msg="Evaluation error in xpath expression: %s (%s)" % (xpath, e))
-
-    # Try to parse in the target XML file
     try:
-        parser = etree.XMLParser(remove_blank_text=pretty_print, strip_cdata=strip_cdata_tags)
+        # Check if the file exists
-        doc = etree.parse(infile, parser)
+        if xml_string:
-    except etree.XMLSyntaxError as e:
+            infile = BytesIO(to_bytes(xml_string, errors='surrogate_or_strict'))
-        module.fail_json(msg="Error while parsing document: %s (%s)" % (xml_file or 'xml_string', e))
+        elif os.path.isfile(xml_file):
+            infile = open(xml_file, 'rb')
+        else:
+            module.fail_json(msg="The target XML source '%s' does not exist." % xml_file)
+
+        # Parse and evaluate xpath expression
+        if xpath is not None:
+            try:
+                etree.XPath(xpath)
+            except etree.XPathSyntaxError as e:
+                module.fail_json(msg="Syntax error in xpath expression: %s (%s)" % (xpath, e))
+            except etree.XPathEvalError as e:
+                module.fail_json(msg="Evaluation error in xpath expression: %s (%s)" % (xpath, e))
+
+        # Try to parse in the target XML file
+        try:
+            parser = etree.XMLParser(remove_blank_text=pretty_print, strip_cdata=strip_cdata_tags)
+            doc = etree.parse(infile, parser)
+        except etree.XMLSyntaxError as e:
+            module.fail_json(msg="Error while parsing document: %s (%s)" % (xml_file or 'xml_string', e))
+    finally:
+        if infile:
+            infile.close()
 
     # Ensure we have the original copy to compare
     global orig_doc