Merge pull request #63 from drewkerrigan/v2-1

Release 2.1

.pylintrc

@@ -1,5 +1,5 @@
 # pylint config
 [MESSAGES CONTROL]
-disable=line-too-long, redefined-outer-name, too-many-arguments, too-many-instance-attributes, fixme, invalid-name, superfluous-parens, missing-function-docstring, missing-module-docstring, multiple-imports, no-else-return, too-many-return-statements
+disable=line-too-long, redefined-outer-name, too-many-arguments, too-many-instance-attributes, fixme, invalid-name, superfluous-parens, missing-function-docstring, missing-module-docstring, multiple-imports, no-else-return, too-many-return-statements, too-many-branches, too-many-statements
 [MASTER]
 ignore-patterns=^test.*

check_http_json.py

@@ -225,9 +225,9 @@ class JsonRuleProcessor:
         if self.rules.value_separator:
             value_separator = self.rules.value_separator
         self.helper = JsonHelper(self.data, separator, value_separator)
-        debugPrint(rules_args.debug, "rules:%s" % rules_args)
+        debugPrint(rules_args.debug, "rules: %s" % rules_args)
-        debugPrint(rules_args.debug, "separator:%s" % separator)
+        debugPrint(rules_args.debug, "separator: %s" % separator)
-        debugPrint(rules_args.debug, "value_separator:%s" % value_separator)
+        debugPrint(rules_args.debug, "value_separator: %s" % value_separator)
         self.metric_list = self.expandKeys(self.rules.metric_list)
         self.key_threshold_warning = self.expandKeys(
             self.rules.key_threshold_warning)
@@ -346,6 +346,8 @@ class JsonRuleProcessor:
 
     def checkCritical(self):
         failure = ''
+        if not self.data:
+            failure = " Empty JSON data."
         if self.key_threshold_critical is not None:
             failure += self.checkThresholds(self.key_threshold_critical)
         if self.key_value_list_critical is not None:
@@ -424,7 +426,7 @@ def parseArgs(args):
     parser.add_argument('-s', '--ssl', action='store_true',
                         help='use TLS to connect to remote host')
     parser.add_argument('-H', '--host', dest='host',
-                        required=not ('-V' in sys.argv or '--version' in sys.argv),
+                        required=not ('-V' in args or '--version' in args),
                         help='remote host to query')
     parser.add_argument('-k', '--insecure', action='store_true',
                         help='do not check server SSL certificate')
@@ -524,10 +526,12 @@ def debugPrint(debug_flag, message, pretty_flag=False):
             print(message)
 
 
-# Program entry point
+def main(cliargs):
-if __name__ == "__main__":
+    """
+    Main entrypoint for CLI
+    """
 
-    args = parseArgs(sys.argv[1:])
+    args = parseArgs(cliargs)
     nagios = NagiosHelper()
     context = None
 
@@ -607,7 +611,11 @@ if __name__ == "__main__":
         json_data = response.read()
 
     except HTTPError as e:
-        nagios.append_unknown(" HTTPError[%s], url:%s" % (str(e.code), url))
+        # Try to recover from HTTP Error, if there is JSON in the response
+        if "json" in e.info().get_content_subtype():
+            json_data = e.read()
+        else:
+            nagios.append_unknown(" HTTPError[%s], url:%s" % (str(e.code), url))
     except URLError as e:
         nagios.append_critical(" URLError[%s], url:%s" % (str(e.reason), url))
 
@@ -630,4 +638,9 @@ if __name__ == "__main__":
     print(nagios.getMessage())
     sys.exit(nagios.getCode())
 
+
+if __name__ == "__main__":
+    # Program entry point
+    main(sys.argv[1:])
+
 #EOF

makefile

@@ -0,0 +1,9 @@
+.PHONY: lint test coverage
+
+lint:
+	python3 -m pylint check_http_json.py
+test:
+	python3 -m unittest discover
+coverage:
+	python3 -m coverage run -m unittest discover
+	python3 -m coverage report -m --include check_http_json.py

test/requirements.txt

@@ -0,0 +1,2 @@
+coverage==5.0.3
+pylint==2.4.4

test/test_check_http_json.py

@@ -256,7 +256,7 @@ class UtilTest(unittest.TestCase):
 
         # This should not throw a KeyError
         data = '{}'
-        self.check_data(rules.dash_q(['(0).Node,foobar', '(1).Node,missing']), data, WARNING_CODE)
+        self.check_data(rules.dash_q(['(0).Node,foobar', '(1).Node,missing']), data, CRITICAL_CODE)
 
     def test_subelem(self):
 
@@ -274,3 +274,23 @@ class UtilTest(unittest.TestCase):
         self.check_data(rules.dash_E(['(*).capacity.value.too_deep']), data, CRITICAL_CODE)
         # Should not throw keyerror
         self.check_data(rules.dash_E(['foo']), data, CRITICAL_CODE)
+
+
+    def test_empty_key_value_array(self):
+        """
+        https://github.com/drewkerrigan/nagios-http-json/issues/61
+        """
+
+        rules = RulesHelper()
+
+        # This should simply work
+        data = '[{"update_status": "finished"},{"update_status": "finished"}]'
+        self.check_data(rules.dash_q(['(*).update_status,finished']), data, OK_CODE)
+
+        # This should warn us
+        data = '[{"update_status": "finished"},{"update_status": "failure"}]'
+        self.check_data(rules.dash_q(['(*).update_status,finished']), data, WARNING_CODE)
+
+        # This should throw an error
+        data = '[]'
+        self.check_data(rules.dash_q(['(*).update_status,warn_me']), data, CRITICAL_CODE)

test/test_cli.py

@@ -0,0 +1,44 @@
+#!/usr/bin/env python3
+
+
+import unittest
+import unittest.mock as mock
+import sys
+import os
+
+sys.path.append('..')
+
+from check_http_json import debugPrint
+
+
+class CLITest(unittest.TestCase):
+    """
+    Tests for CLI
+    """
+
+    def setUp(self):
+        """
+        Defining the exitcodes
+        """
+
+        self.exit_0 = 0 << 8
+        self.exit_1 = 1 << 8
+        self.exit_2 = 2 << 8
+        self.exit_3 = 3 << 8
+
+    def test_debugprint(self):
+        with mock.patch('builtins.print') as mock_print:
+            debugPrint(True, 'debug')
+            mock_print.assert_called_once_with('debug')
+
+    def test_debugprint_pprint(self):
+        with mock.patch('check_http_json.pprint') as mock_pprint:
+            debugPrint(True, 'debug', True)
+            mock_pprint.assert_called_once_with('debug')
+
+    def test_cli_without_params(self):
+
+        command = '/usr/bin/env python3 check_http_json.py > /dev/null 2>&1'
+        status = os.system(command)
+
+        self.assertEqual(status, self.exit_2)

test/test_main.py

@@ -8,37 +8,90 @@ import os
 
 sys.path.append('..')
 
-from check_http_json import debugPrint
+from check_http_json import main
+
+
+class MockResponse():
+    def __init__(self, status_code=200, content='{"foo": "bar"}'):
+        self.status_code = status_code
+        self.content = content
+
+    def read(self):
+        return self.content
 
 
 class MainTest(unittest.TestCase):
     """
-    Tests for main
+    Tests for Main
     """
 
-    def setUp(self):
+    @mock.patch('builtins.print')
-        """
+    def test_main_version(self, mock_print):
-        Defining the exitcodes
+        args = ['--version']
-        """
 
-        self.exit_0 = 0 << 8
+        with self.assertRaises(SystemExit) as test:
-        self.exit_1 = 1 << 8
+            main(args)
-        self.exit_2 = 2 << 8
-        self.exit_3 = 3 << 8
 
-    def test_debugprint(self):
+        mock_print.assert_called_once()
-        with mock.patch('builtins.print') as mock_print:
+        self.assertEqual(test.exception.code, 0)
-            debugPrint(True, 'debug')
-            mock_print.assert_called_once_with('debug')
 
-    def test_debugprint_pprint(self):
+    @mock.patch('builtins.print')
-        with mock.patch('check_http_json.pprint') as mock_pprint:
+    @mock.patch('urllib.request.urlopen')
-            debugPrint(True, 'debug', True)
+    def test_main_with_ssl(self, mock_request, mock_print):
-            mock_pprint.assert_called_once_with('debug')
+        args = '-H localhost --ssl'.split(' ')
 
-    def test_cli_without_params(self):
+        mock_request.return_value = MockResponse()
 
-        command = '/usr/bin/env python3 check_http_json.py > /dev/null 2>&1'
+        with self.assertRaises(SystemExit) as test:
-        status = os.system(command)
+            main(args)
 
-        self.assertEqual(status, self.exit_2)
+        self.assertEqual(test.exception.code, 0)
+
+
+    @mock.patch('builtins.print')
+    @mock.patch('urllib.request.urlopen')
+    def test_main_with_parse_error(self, mock_request, mock_print):
+        args = '-H localhost'.split(' ')
+
+        mock_request.return_value = MockResponse(content='not JSON')
+
+        with self.assertRaises(SystemExit) as test:
+            main(args)
+
+        self.assertTrue('Parser error' in str(mock_print.call_args))
+        self.assertEqual(test.exception.code, 3)
+
+    @mock.patch('builtins.print')
+    def test_main_with_url_error(self, mock_print):
+        args = '-H localhost'.split(' ')
+
+        with self.assertRaises(SystemExit) as test:
+            main(args)
+
+        self.assertTrue('URLError' in str(mock_print.call_args))
+        self.assertEqual(test.exception.code, 3)
+
+    @mock.patch('builtins.print')
+    @mock.patch('urllib.request.urlopen')
+    def test_main_with_http_error_no_json(self, mock_request, mock_print):
+        args = '-H localhost'.split(' ')
+
+        mock_request.return_value = MockResponse(content='not JSON', status_code=503)
+
+        with self.assertRaises(SystemExit) as test:
+            main(args)
+
+        self.assertTrue('Parser error' in str(mock_print.call_args))
+        self.assertEqual(test.exception.code, 3)
+
+    @mock.patch('builtins.print')
+    @mock.patch('urllib.request.urlopen')
+    def test_main_with_http_error_valid_json(self, mock_request, mock_print):
+        args = '-H localhost'.split(' ')
+
+        mock_request.return_value = MockResponse(status_code=503)
+
+        with self.assertRaises(SystemExit) as test:
+            main(args)
+
+        self.assertEqual(test.exception.code, 0)