Add support for cliconf and netconf plugin (#25093)

* ansible-connection refactor and action plugin changes
* Add cliconf plugin for eos, ios, iosxr, junos, nxos, vyos
* Add netconf plugin for junos
* Add jsonrpc support
* Modify network_cli and netconf connection plugin
* Fix py3 unit test failure
* Fix review comment
* Minor fixes
* Fix ansible-connection review comments
* Fix CI issue
* platform_agnostic related changes

lib/ansible/utils/jsonrpc.py

@@ -0,0 +1,115 @@
+#
+# (c) 2016 Red Hat Inc.
+#
+# This file is part of Ansible
+#
+# Ansible is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# Ansible is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with Ansible.  If not, see <http://www.gnu.org/licenses/>.
+from __future__ import (absolute_import, division, print_function)
+__metaclass__ = type
+
+import json
+import traceback
+
+from ansible.module_utils._text import to_text
+
+try:
+    from __main__ import display
+except ImportError:
+    from ansible.utils.display import Display
+    display = Display()
+
+
+class Rpc:
+
+    def __init__(self, *args, **kwargs):
+        self._rpc = set()
+        super(Rpc, self).__init__(*args, **kwargs)
+
+    def _exec_rpc(self, request):
+        method = request.get('method')
+
+        if method.startswith('rpc.') or method.startswith('_'):
+            error = self.invalid_request()
+            return json.dumps(error)
+
+        params = request.get('params')
+        setattr(self, '_identifier', request.get('id'))
+        args = []
+        kwargs = {}
+
+        if all((params, isinstance(params, list))):
+            args = params
+        elif all((params, isinstance(params, dict))):
+            kwargs = params
+
+        rpc_method = None
+        for obj in self._rpc:
+            rpc_method = getattr(obj, method, None)
+            if rpc_method:
+                break
+
+        if not rpc_method:
+            error = self.method_not_found()
+            response = json.dumps(error)
+        else:
+            try:
+                result = rpc_method(*args, **kwargs)
+                display.display(" -- result -- %s" % result, log_only=True)
+            except Exception as exc:
+                display.display(traceback.format_exc(), log_only=True)
+                error = self.internal_error(data=to_text(exc, errors='surrogate_then_replace'))
+                response = json.dumps(error)
+            else:
+                if isinstance(result, dict) and 'jsonrpc' in result:
+                    response = result
+                else:
+                    response = self.response(result)
+
+                response = json.dumps(response)
+
+        display.display(" -- response -- %s" % response, log_only=True)
+        delattr(self, '_identifier')
+        return response
+
+    def header(self):
+        return {'jsonrpc': '2.0', 'id': self._identifier}
+
+    def response(self, result=None):
+        response = self.header()
+        response['result'] = result or 'ok'
+        return response
+
+    def error(self, code, message, data=None):
+        response = self.header()
+        error = {'code': code, 'message': message}
+        if data:
+            error['data'] = data
+        response['error'] = error
+        return response
+
+    # json-rpc standard errors (-32768 .. -32000)
+    def parse_error(self, data=None):
+        return self.error(-32700, 'Parse error', data)
+
+    def method_not_found(self, data=None):
+        return self.error(-32601, 'Method not found', data)
+
+    def invalid_request(self, data=None):
+        return self.error(-32600, 'Invalid request', data)
+
+    def invalid_params(self, data=None):
+        return self.error(-32602, 'Invalid params', data)
+
+    def internal_error(self, data=None):
+        return self.error(-32603, 'Internal error', data)