[spp] [PATCH] spp-ctl: fix error in parsing replied message

[ogawa.yasufumi@lab.ntt.co.jp]

From: Yasufumi Ogawa <ogawa.yasufumi@lab.ntt.co.jp>

Spp-ctl expects a response of command from secondary process is JSON
format for checking the result, but it is not a constraint. However,
parsing is failed and terminated if it is not JSON because of
inappropriate error handling. This update is to add a exception handler
of JSONDecodeError and not terminated.

Signed-off-by: Yasufumi Ogawa <ogawa.yasufumi@lab.ntt.co.jp>
---
 src/spp-ctl/spp_ctl.py    |  1 -
 src/spp-ctl/spp_proc.py   | 19 ++++++++++++++-----
 src/spp-ctl/spp_webapi.py | 15 +--------------
 3 files changed, 15 insertions(+), 20 deletions(-)

diff --git a/src/spp-ctl/spp_ctl.py b/src/spp-ctl/spp_ctl.py
index f6c00fb..c4dd4b2 100644
--- a/src/spp-ctl/spp_ctl.py
+++ b/src/spp-ctl/spp_ctl.py
@@ -6,7 +6,6 @@ eventlet.monkey_patch()
 
 import argparse
 import errno
-import json
 import logging
 import socket
 import subprocess
diff --git a/src/spp-ctl/spp_proc.py b/src/spp-ctl/spp_proc.py
index b9105d0..19a5e53 100644
--- a/src/spp-ctl/spp_proc.py
+++ b/src/spp-ctl/spp_proc.py
@@ -57,12 +57,21 @@ class SppProc(object):
     @staticmethod
     def _decode_reply(data):
         # Remove '\0' in msg from secondary process to avoid error.
-        data = json.loads(data.replace('\0', ''))
+        try:
+            data = json.loads(data.replace('\0', ''))
+
+            if "results" in data.keys():  # msg ffrom spp_vf
+                result = data["results"][0]
+                if result["result"] == "error":
+                    msg = result["error_details"]["message"]
+                    raise bottle.HTTPError(400, "command error: %s" % msg)
+
+            return data
+
+        except json.JSONDecodeError as e:
+            LOG.error("'{}' in JSON decoding.".format(e))
 
-        result = data["results"][0]
-        if result["result"] == "error":
-            msg = result["error_details"]["message"]
-            raise bottle.HTTPError(400, "command error: %s" % msg)
+        LOG.debug("Reply msg is not JSON format '{data}'.".format(**locals()))
         return data
 
     @staticmethod
diff --git a/src/spp-ctl/spp_webapi.py b/src/spp-ctl/spp_webapi.py
index d88d7a9..0fd2f2a 100644
--- a/src/spp-ctl/spp_webapi.py
+++ b/src/spp-ctl/spp_webapi.py
@@ -378,21 +378,8 @@ class V1NFVHandler(BaseHandler):
         self.route('/<sec_id:int>/patches', 'DELETE',
                    callback=self.nfv_patch_del)
 
-    def convert_nfv_info(self, sec_id, data):
-        nfv = {}
-
-        # spp_nfv returns status info in JSON format. 'null' means
-        # that it has no dst port.
-        #   {"status":"idling","ports":[{"src":"phy:0","dst":"null"},...
-
-        try:
-            nfv = json.loads(data)
-        except json.JSONDecodeError as e:
-            print("%s" % e)
-        return nfv
-
     def nfv_get(self, proc):
-        return self.convert_nfv_info(proc.id, proc.get_status())
+        return proc.get_status()
 
     def _validate_nfv_forward(self, body):
         if 'action' not in body:
-- 
2.17.1