graphql: T3993: add config session show_config

Note that one can also use the mutation Show, with path
["configuration", "json", "pretty"]; that command will obscure passwords
and keys, and we may want to disallow this version.

(cherry picked from commit a05866e5301934f61a3c83550f91926e03bfc7b0)

1 files changed, 19 insertions, 0 deletions

diff --git a/src/services/api/graphql/recipes/session.py b/src/services/api/graphql/recipes/session.py
index c6c3209c0..f8c072b39 100644
--- a/src/services/api/graphql/recipes/session.py
+++ b/src/services/api/graphql/recipes/session.py
@@ -1,6 +1,10 @@
+import json
+
 from ariadne import convert_camel_case_to_snake
+
 import vyos.defaults
 from vyos.config import Config
+from vyos.configtree import ConfigTree
 from vyos.template import render
 
 class Session(object):
@@ -43,6 +47,21 @@ class Session(object):
             session.delete(path)
             session.commit()
 
+    def show_config(self):
+        session = self._session
+        data = self._data
+        out = ''
+
+        try:
+            out = session.show_config(data['path'])
+            if data.get('config_format', '') == 'json':
+                config_tree = vyos.configtree.ConfigTree(out)
+                out = json.loads(config_tree.to_json())
+        except Exception as error:
+            raise error
+
+        return out
+
     def save(self):
         session = self._session
         data = self._data