cli: ensure the program returns 0 on success and 1 on error

propagate a returncode in each operation and make it the
returncode of the program.

Prevent sys.exit calls in post(), get() and delete() request
handlers to enable cleanup code and error handling. Keep a basic
error log inside the request functions if the connection can't
be established or if the response contains an error code.

1 files changed, 12 insertions, 3 deletions

diff --git a/cli/objects/center.py b/cli/objects/center.py
index 80e5e3e..9948254 100644
--- a/cli/objects/center.py
+++ b/cli/objects/center.py
@@ -23,7 +23,10 @@ class OgCenter():
         payload = {'name': parsed_args.name}
         if parsed_args.desc:
             payload['comment'] = parsed_args.desc
-        rest.post('/center/add', payload=payload)
+        res = rest.post('/center/add', payload=payload)
+        if not res:
+            return 1
+        return 0
 
     @staticmethod
     def update_center(rest, args):
@@ -48,7 +51,10 @@ class OgCenter():
         }
         if parsed_args.comment:
             payload['comment'] = parsed_args.comment
-        rest.post('/center/update', payload=payload)
+        res = rest.post('/center/update', payload=payload)
+        if not res:
+            return 1
+        return 0
 
     @staticmethod
     def delete_center(rest, args):
@@ -60,4 +66,7 @@ class OgCenter():
                             help='center id in database')
         parsed_args = parser.parse_args(args)
         payload = {'id': parsed_args.id}
-        rest.post('/center/delete', payload=payload)
+        res = rest.post('/center/delete', payload=payload)
+        if not res:
+            return 1
+        return 0