Only assume GET if no data, otherwise POST (#43133)

* Only assume GET if no data, otherwise POST. Fixes #42876 #43091 #42750

changelogs/fragments/fix-open-url.yml

@@ -0,0 +1,2 @@
+bugfixes:
+- urls - Only assume GET method if data is empty, otherwise POST

lib/ansible/module_utils/urls.py

@@ -1136,7 +1136,7 @@ def open_url(url, data=None, headers=None, method=None, use_proxy=True,
 
     Does not require the module environment
     '''
-    method = method or 'GET'
+    method = method or ('POST' if data else 'GET')
     return Request().open(method, url, data=data, headers=headers, use_proxy=use_proxy,
                           force=force, last_mod_time=last_mod_time, timeout=timeout, validate_certs=validate_certs,
                           url_username=url_username, url_password=url_password, http_agent=http_agent,