Merge pull request #68 from ccin2p3/feature/load_default_ca_certs

[TLS] Always load system default C.A files

.github/workflows/unittest.yml

@@ -0,0 +1,27 @@
+name: CI
+
+on: [push, pull_request]
+
+jobs:
+  gitHubActionForPytest:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        python-version: [3.6, 3.7, 3.8]
+    name: GitHub Action
+    steps:
+    - name: Checkout
+      uses: actions/checkout@v2
+    - name: Lint
+      run: |
+        pip3 install --upgrade pip wheel setuptools
+        pip3 install pylint
+        python3 -m pylint check_http_json.py
+    - name: Unit Test
+      run: |
+        python3 -m unittest discover
+    - name: Coverage
+      run: |
+        pip3 install coverage
+        python3 -m coverage run -m unittest discover
+        python3 -m coverage report -m --include check_http_json.py

.gitignore

@@ -0,0 +1,64 @@
+#Emacs
+\#*
+.\#*
+
+# Byte-compiled / optimized / DLL files
+__pycache__/
+*.py[cod]
+*$py.class
+
+# Distribution / packaging
+.Python
+env/
+build/
+develop-eggs/
+dist/
+downloads/
+eggs/
+.eggs/
+lib/
+lib64/
+parts/
+sdist/
+var/
+*.egg-info/
+.installed.cfg
+*.egg
+.venv/
+
+# PyInstaller
+#  Usually these files are written by a python script from a template
+#  before PyInstaller builds the exe, so as to inject date/other infos into it.
+*.manifest
+*.spec
+
+# Installer logs
+pip-log.txt
+pip-delete-this-directory.txt
+
+# Unit test / coverage reports
+htmlcov/
+.tox/
+.coverage
+.coverage.*
+.cache
+nosetests.xml
+coverage.xml
+*,cover
+.hypothesis/
+
+# Translations
+*.mo
+*.pot
+
+# Django stuff:
+*.log
+
+# Sphinx documentation
+docs/_build/
+
+# PyBuilder
+target/
+
+#Ipython Notebook
+.ipynb_checkpoints

.pylintrc

@@ -0,0 +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, too-many-branches, too-many-statements
+[MASTER]
+ignore-patterns=^test.*

README.md

@@ -1,3 +1,5 @@
+![CI](https://github.com/drewkerrigan/nagios-http-json/workflows/CI/badge.svg)
+
 # Nagios Json Plugin
 
 This is a generic plugin for Nagios which checks json values from a given HTTP endpoint against argument specified rules and determines the status and performance data for that service.
@@ -18,7 +20,7 @@ Executing `./check_http_json.py -h` will yield the following details:
 usage: check_http_json.py [-h] [-d] [-s] -H HOST [-k] [-V] [--cacert CACERT]
                           [--cert CERT] [--key KEY] [-P PORT] [-p PATH]
                           [-t TIMEOUT] [-B AUTH] [-D DATA] [-A HEADERS]
-                          [-f SEPARATOR]
+                          [-f FIELD_SEPARATOR] [-F VALUE_SEPARATOR]
                           [-w [KEY_THRESHOLD_WARNING [KEY_THRESHOLD_WARNING ...]]]
                           [-c [KEY_THRESHOLD_CRITICAL [KEY_THRESHOLD_CRITICAL ...]]]
                           [-e [KEY_LIST [KEY_LIST ...]]]
@@ -36,7 +38,7 @@ Generic Nagios plugin which checks json values from a given endpoint against
 argument specified rules and determines the status and performance data for
 that service.
 
-Version: 1.4.0 (2019-05-09)
+Version: 2.0.0 (2020-03-22)
 
 optional arguments:
   -h, --help            show this help message and exit
@@ -60,6 +62,8 @@ optional arguments:
   -f SEPARATOR, --field_separator SEPARATOR
                         JSON Field separator, defaults to "."; Select element
                         in an array with "(" ")"
+  -F SEPARATOR, --value_separator SEPARATOR
+                        JSON Value separator, defaults to ":";
   -w [KEY_THRESHOLD_WARNING [KEY_THRESHOLD_WARNING ...]], --warning [KEY_THRESHOLD_WARNING [KEY_THRESHOLD_WARNING ...]]
                         Warning threshold for these values
                         (key1[>alias],WarnRange key2[>alias],WarnRange).
@@ -133,6 +137,21 @@ optional arguments:
         }
     ]
 
+**Data for keys of all items in a list** `(*).capacity.value`:
+
+    [
+        {
+            "capacity": {
+                "value": 1000
+            }
+        },
+        {
+            "capacity": {
+                "value": 2200
+            }
+        }
+    ]
+
 **Data for separator** `-f _` **and key** `(0)_gauges_jvm.buffers.direct.capacity_value`:
 
     [
@@ -191,7 +210,7 @@ More info about Nagios Range format and Units of Measure can be found at [https:
 
 ### Requirements
 
-* Python 2.7
+* Python 3.6+
 
 ### Configuration
 
@@ -226,7 +245,10 @@ define command{
 
 ```
 
-More info about options in Usage.
+## Icinga2 configuration
+
+The Icinga2 command definition can be found here: (contrib/icinga2_check_command_definition.conf)
+
 
 ## License
 

check_http_json.py

@@ -1,4 +1,14 @@
-#!/usr/bin/python2.7
+#!/usr/bin/env python3
+
+import urllib.request, urllib.error, urllib.parse
+import base64
+import json
+import argparse
+import sys
+import ssl
+from pprint import pprint
+from urllib.error import HTTPError
+from urllib.error import URLError
 
 plugin_description = \
 """
@@ -9,26 +19,19 @@ argument specified rules and determines the status and performance data for
 that service.
 """
 
-import urllib2
-import base64
-import json
-import argparse
-import sys
-import ssl
-from pprint import pprint
-from urllib2 import HTTPError
-from urllib2 import URLError
-
 OK_CODE = 0
 WARNING_CODE = 1
 CRITICAL_CODE = 2
 UNKNOWN_CODE = 3
 
-__version__ = '1.4.0'
+__version__ = '2.0.0'
-__version_date__ = '2019-05-09'
+__version_date__ = '2020-03-22'
 
 class NagiosHelper:
-    """Help with Nagios specific status string formatting."""
+    """
+    Help with Nagios specific status string formatting.
+    """
+
     message_prefixes = {OK_CODE: 'OK',
                         WARNING_CODE: 'WARNING',
                         CRITICAL_CODE: 'CRITICAL',
@@ -38,17 +41,23 @@ class NagiosHelper:
     critical_message = ''
     unknown_message = ''
 
-    def getMessage(self):
+    def getMessage(self, message=''):
-        """Build a status-prefixed message with optional performance data
+        """
-        generated externally"""
+        Build a status-prefixed message with optional performance data
-        text = "%s: Status %s." % (self.message_prefixes[self.getCode()],
+        generated externally
-                                   self.message_prefixes[self.getCode()])
+        """
-        text += self.warning_message
+
-        text += self.critical_message
+        message += self.warning_message
-        text += self.unknown_message
+        message += self.critical_message
+        message += self.unknown_message
+        code = self.message_prefixes[self.getCode()]
+        output = "{code}: Status {code}. {message}".format(code=code, message=message.strip())
         if self.performance_data:
-            text += "|%s" % self.performance_data
+            output = "{code}: {perf_data} Status {code}. {message}|{perf_data}".format(
-        return text
+                code=code,
+                message=message.strip(),
+                perf_data=self.performance_data)
+        return output.strip()
 
     def getCode(self):
         code = OK_CODE
@@ -69,19 +78,23 @@ class NagiosHelper:
     def append_unknown(self, unknown_message):
         self.unknown_message += unknown_message
 
-    def append_metrics(self, (performance_data,
+    def append_metrics(self, metrics):
-                              warning_message, critical_message)):
+        (performance_data, warning_message, critical_message) = metrics
         self.performance_data += performance_data
         self.append_warning(warning_message)
         self.append_critical(critical_message)
 
 
 class JsonHelper:
-    """Perform simple comparison operations against values in a given
+    """
-    JSON dict"""
+    Perform simple comparison operations against values in a given
-    def __init__(self, json_data, separator):
+    JSON dict
+    """
+
+    def __init__(self, json_data, separator, value_separator):
         self.data = json_data
         self.separator = separator
+        self.value_separator = value_separator
         self.arrayOpener = '('
         self.arrayCloser = ')'
 
@@ -91,7 +104,6 @@ class JsonHelper:
         remainingKey = key[separatorIndex + 1:]
         if partialKey in data:
             return self.get(remainingKey, data[partialKey])
-        else:
         return (None, 'not_found')
 
     def getSubArrayElement(self, key, data):
@@ -99,6 +111,7 @@ class JsonHelper:
         index = int(key[key.find(self.arrayOpener) +
                         1:key.find(self.arrayCloser)])
         remainingKey = key[key.find(self.arrayCloser + self.separator) + 2:]
+
         if key.find(self.arrayCloser + self.separator) == -1:
             remainingKey = key[key.find(self.arrayCloser) + 1:]
         if subElemKey in data:
@@ -106,6 +119,8 @@ class JsonHelper:
                 return self.get(remainingKey, data[subElemKey][index])
             else:
                 return (None, 'not_found')
+        if index >= len(data):
+            return (None, 'not_found')
         else:
             if not subElemKey:
                 return self.get(remainingKey, data[index])
@@ -114,7 +129,7 @@ class JsonHelper:
 
     def equals(self, key, value):
         return self.exists(key) and \
-            str(self.get(key)) in value.split(':')
+            str(self.get(key)) in value.split(self.value_separator)
 
     def lte(self, key, value):
         return self.exists(key) and float(self.get(key)) <= float(value)
@@ -132,9 +147,12 @@ class JsonHelper:
         return (self.get(key) != (None, 'not_found'))
 
     def get(self, key, temp_data=''):
-        """Can navigate nested json keys with a dot format
+        """
-        (Element.Key.NestedKey). Returns (None, 'not_found') if not found"""
+        Can navigate nested json keys with a dot format
-        if temp_data:
+        (Element.Key.NestedKey). Returns (None, 'not_found') if not found
+        """
+
+        if temp_data != '':
             data = temp_data
         else:
             data = self.data
@@ -153,7 +171,7 @@ class JsonHelper:
                 if key.find(self.arrayOpener) != -1:
                     return self.getSubArrayElement(key, data)
                 else:
-                    if key in data:
+                    if isinstance(data, dict) and key in data:
                         return data[key]
                     else:
                         return (None, 'not_found')
@@ -167,10 +185,10 @@ class JsonHelper:
             subElemKey = key[:key.find('(*)')-1]
         remainingKey = key[key.find('(*)')+3:]
         elemData = self.get(subElemKey)
-        if elemData is (None, 'not_found'):
+        if elemData == (None, 'not_found'):
             keys.append(key)
             return keys
-        if subElemKey is not '':
+        if subElemKey != '':
             subElemKey = subElemKey + '.'
         for i in range(len(elemData)):
             newKey = subElemKey + '(' + str(i) + ')' + remainingKey
@@ -192,17 +210,24 @@ def _getKeyAlias(original_key):
 
 
 class JsonRuleProcessor:
-    """Perform checks and gather values from a JSON dict given rules
+    """
-    and metrics definitions"""
+    Perform checks and gather values from a JSON dict given rules
+    and metrics definitions
+    """
+
     def __init__(self, json_data, rules_args):
         self.data = json_data
         self.rules = rules_args
         separator = '.'
+        value_separator = ':'
         if self.rules.separator:
             separator = self.rules.separator
-        self.helper = JsonHelper(self.data, separator)
+        if self.rules.value_separator:
-        debugPrint(rules_args.debug, "rules:%s" % rules_args)
+            value_separator = self.rules.value_separator
-        debugPrint(rules_args.debug, "separator:%s" % separator)
+        self.helper = JsonHelper(self.data, separator, value_separator)
+        debugPrint(rules_args.debug, "rules: %s" % rules_args)
+        debugPrint(rules_args.debug, "separator: %s" % 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)
@@ -222,7 +247,7 @@ class JsonRuleProcessor:
 
     def expandKeys(self, src):
         if src is None:
-            return
+            return []
         dest = []
         for key in src:
             newKeys = self.helper.expandKey(key, [])
@@ -243,7 +268,7 @@ class JsonRuleProcessor:
         for kv in equality_list:
             k, v = kv.split(',')
             key, alias = _getKeyAlias(k)
-            if (self.helper.equals(key, v) == False):
+            if not self.helper.equals(key, v):
                 failure += " Key %s mismatch. %s != %s" % (alias, v,
                                                            self.helper.get(key))
         return failure
@@ -253,7 +278,7 @@ class JsonRuleProcessor:
         for kv in equality_list:
             k, v = kv.split(',')
             key, alias = _getKeyAlias(k)
-            if (self.helper.equals(key, v) == True):
+            if self.helper.equals(key, v):
                 failure += " Key %s match found. %s == %s" % (alias, v,
                                                               self.helper.get(key))
         return failure
@@ -321,6 +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:
@@ -338,8 +365,11 @@ class JsonRuleProcessor:
         return unknown
 
     def checkMetrics(self):
-        """Return a Nagios specific performance metrics string given keys
+        """
-        and parameter definitions"""
+        Return a Nagios specific performance metrics string given keys
+        and parameter definitions
+        """
+
         metrics = ''
         warning = ''
         critical = ''
@@ -380,18 +410,23 @@ class JsonRuleProcessor:
         return ("%s" % metrics, warning, critical)
 
 
-def parseArgs():
+def parseArgs(args):
+    """
+    CLI argument definitions and parsing
+    """
+
     parser = argparse.ArgumentParser(
-    description = plugin_description + '\n\nVersion: %s (%s)'
+        description=plugin_description + '\n\nVersion: %s (%s)'
         %(__version__, __version_date__),
-    formatter_class=argparse.RawDescriptionHelpFormatter)
+        formatter_class=argparse.RawDescriptionHelpFormatter
+    )
 
     parser.add_argument('-d', '--debug', action='store_true',
                         help='debug mode')
     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')
@@ -416,6 +451,8 @@ def parseArgs():
     parser.add_argument('-f', '--field_separator', dest='separator',
                         help='''JSON Field separator, defaults to ".";
                         Select element in an array with "(" ")"''')
+    parser.add_argument('-F', '--value_separator', dest='value_separator',
+                        help='''JSON Value separator, defaults to ":"''')
     parser.add_argument('-w', '--warning', dest='key_threshold_warning',
                         nargs='*',
                         help='''Warning threshold for these values
@@ -474,218 +511,33 @@ def parseArgs():
                         (key[>alias],UnitOfMeasure,WarnRange,
                         CriticalRange).''')
 
-    return parser.parse_args()
+    return parser.parse_args(args)
 
 
 def debugPrint(debug_flag, message, pretty_flag=False):
+    """
+    Print debug messages if -d (debug_flat ) is set.
+    """
+
     if debug_flag:
         if pretty_flag:
             pprint(message)
         else:
             print(message)
 
-if __name__ == "__main__" and len(sys.argv) >= 2 and sys.argv[1] == 'UnitTest':
-    import unittest
 
-    class RulesHelper:
+def main(cliargs):
-        separator = '.'
+    """
-        debug = False
+    Main entrypoint for CLI
-        key_threshold_warning = None
+    """
-        key_value_list = None
-        key_value_list_not = None
-        key_list = None
-        key_threshold_critical = None
-        key_value_list_critical = None
-        key_value_list_not_critical = None
-        key_value_list_unknown = None
-        key_list_critical = None
-        metric_list = None
 
-        def dash_m(self, data):
+    args = parseArgs(cliargs)
-            self.metric_list = data
-            return self
-
-        def dash_e(self, data):
-            self.key_list = data
-            return self
-
-        def dash_E(self, data):
-            self.key_list_critical = data
-            return self
-
-        def dash_q(self, data):
-            self.key_value_list = data
-            return self
-
-        def dash_Q(self, data):
-            self.key_value_list_critical = data
-            return self
-
-        def dash_y(self, data):
-            self.key_value_list_not = data
-            return self
-
-        def dash_Y(self, data):
-            self.key_value_list_not_critical = data
-            return self
-
-        def dash_w(self, data):
-            self.key_threshold_warning = data
-            return self
-
-        def dash_c(self, data):
-            self.key_threshold_critical = data
-            return self
-
-    class UnitTest(unittest.TestCase):
-        rules = RulesHelper()
-
-        def check_data(self, args, jsondata, code):
-            data = json.loads(jsondata)
     nagios = NagiosHelper()
-            processor = JsonRuleProcessor(data, args)
+    context = None
-            nagios.append_warning(processor.checkWarning())
-            nagios.append_critical(processor.checkCritical())
-            nagios.append_metrics(processor.checkMetrics())
-            self.assertEqual(code, nagios.getCode())
 
-        def test_metrics(self):
-            self.check_data(RulesHelper().dash_m(['metric,,1:4,1:5']),
-                            '{"metric": 5}', WARNING_CODE)
-            self.check_data(RulesHelper().dash_m(['metric,,1:5,1:4']),
-                            '{"metric": 5}', CRITICAL_CODE)
-            self.check_data(RulesHelper().dash_m(['metric,,1:5,1:5,6,10']),
-                            '{"metric": 5}', CRITICAL_CODE)
-            self.check_data(RulesHelper().dash_m(['metric,,1:5,1:5,1,4']),
-                            '{"metric": 5}', CRITICAL_CODE)
-            self.check_data(RulesHelper().dash_m(['metric,s,@1:4,@6:10,1,10']),
-                            '{"metric": 5}', OK_CODE)
-            self.check_data(RulesHelper().dash_m(['(*).value,s,1:5,1:5']),
-                            '[{"value": 5},{"value": 100}]', CRITICAL_CODE)
-
-        def test_exists(self):
-            self.check_data(RulesHelper().dash_e(['nothere']),
-                            '{"metric": 5}', WARNING_CODE)
-            self.check_data(RulesHelper().dash_E(['nothere']),
-                            '{"metric": 5}', CRITICAL_CODE)
-            self.check_data(RulesHelper().dash_e(['metric']),
-                            '{"metric": 5}', OK_CODE)
-
-        def test_equality(self):
-            self.check_data(RulesHelper().dash_q(['metric,6']),
-                            '{"metric": 5}', WARNING_CODE)
-            self.check_data(RulesHelper().dash_Q(['metric,6']),
-                            '{"metric": 5}', CRITICAL_CODE)
-            self.check_data(RulesHelper().dash_q(['metric,5']),
-                            '{"metric": 5}', OK_CODE)
-
-        def test_non_equality(self):
-            self.check_data(RulesHelper().dash_y(['metric,6']),
-                            '{"metric": 6}', WARNING_CODE)
-            self.check_data(RulesHelper().dash_Y(['metric,6']),
-                            '{"metric": 6}', CRITICAL_CODE)
-            self.check_data(RulesHelper().dash_y(['metric,5']),
-                            '{"metric": 6}', OK_CODE)
-
-        def test_warning_thresholds(self):
-            self.check_data(RulesHelper().dash_w(['metric,5']),
-                            '{"metric": 5}', OK_CODE)
-            self.check_data(RulesHelper().dash_w(['metric,5:']),
-                            '{"metric": 5}', OK_CODE)
-            self.check_data(RulesHelper().dash_w(['metric,~:5']),
-                            '{"metric": 5}', OK_CODE)
-            self.check_data(RulesHelper().dash_w(['metric,1:5']),
-                            '{"metric": 5}', OK_CODE)
-            self.check_data(RulesHelper().dash_w(['metric,@5']),
-                            '{"metric": 6}', OK_CODE)
-            self.check_data(RulesHelper().dash_w(['metric,@5:']),
-                            '{"metric": 4}', OK_CODE)
-            self.check_data(RulesHelper().dash_w(['metric,@~:5']),
-                            '{"metric": 6}', OK_CODE)
-            self.check_data(RulesHelper().dash_w(['metric,@1:5']),
-                            '{"metric": 6}', OK_CODE)
-            self.check_data(RulesHelper().dash_w(['metric,5']),
-                            '{"metric": 6}', WARNING_CODE)
-            self.check_data(RulesHelper().dash_w(['metric,5:']),
-                            '{"metric": 4}', WARNING_CODE)
-            self.check_data(RulesHelper().dash_w(['metric,~:5']),
-                            '{"metric": 6}', WARNING_CODE)
-            self.check_data(RulesHelper().dash_w(['metric,1:5']),
-                            '{"metric": 6}', WARNING_CODE)
-            self.check_data(RulesHelper().dash_w(['metric,@5']),
-                            '{"metric": 5}', WARNING_CODE)
-            self.check_data(RulesHelper().dash_w(['metric,@5:']),
-                            '{"metric": 5}', WARNING_CODE)
-            self.check_data(RulesHelper().dash_w(['metric,@~:5']),
-                            '{"metric": 5}', WARNING_CODE)
-            self.check_data(RulesHelper().dash_w(['metric,@1:5']),
-                            '{"metric": 5}', WARNING_CODE)
-            self.check_data(RulesHelper().dash_w(['(*).value,@1:5']),
-                            '[{"value": 5},{"value": 1000}]', WARNING_CODE)
-
-        def test_critical_thresholds(self):
-            self.check_data(RulesHelper().dash_c(['metric,5']),
-                            '{"metric": 5}', OK_CODE)
-            self.check_data(RulesHelper().dash_c(['metric,5:']),
-                            '{"metric": 5}', OK_CODE)
-            self.check_data(RulesHelper().dash_c(['metric,~:5']),
-                            '{"metric": 5}', OK_CODE)
-            self.check_data(RulesHelper().dash_c(['metric,1:5']),
-                            '{"metric": 5}', OK_CODE)
-            self.check_data(RulesHelper().dash_c(['metric,@5']),
-                            '{"metric": 6}', OK_CODE)
-            self.check_data(RulesHelper().dash_c(['metric,@5:']),
-                            '{"metric": 4}', OK_CODE)
-            self.check_data(RulesHelper().dash_c(['metric,@~:5']),
-                            '{"metric": 6}', OK_CODE)
-            self.check_data(RulesHelper().dash_c(['metric,@1:5']),
-                            '{"metric": 6}', OK_CODE)
-            self.check_data(RulesHelper().dash_c(['metric,5']),
-                            '{"metric": 6}', CRITICAL_CODE)
-            self.check_data(RulesHelper().dash_c(['metric,5:']),
-                            '{"metric": 4}', CRITICAL_CODE)
-            self.check_data(RulesHelper().dash_c(['metric,~:5']),
-                            '{"metric": 6}', CRITICAL_CODE)
-            self.check_data(RulesHelper().dash_c(['metric,1:5']),
-                            '{"metric": 6}', CRITICAL_CODE)
-            self.check_data(RulesHelper().dash_c(['metric,@5']),
-                            '{"metric": 5}', CRITICAL_CODE)
-            self.check_data(RulesHelper().dash_c(['metric,@5:']),
-                            '{"metric": 5}', CRITICAL_CODE)
-            self.check_data(RulesHelper().dash_c(['metric,@~:5']),
-                            '{"metric": 5}', CRITICAL_CODE)
-            self.check_data(RulesHelper().dash_c(['metric,@1:5']),
-                            '{"metric": 5}', CRITICAL_CODE)
-            self.check_data(RulesHelper().dash_c(['(*).value,@1:5']),
-                            '[{"value": 5},{"value": 1000}]', CRITICAL_CODE)
-
-        def test_separator(self):
-            rules = RulesHelper()
-            rules.separator = '_'
-            self.check_data(
-                rules.dash_q(
-                    ['(0)_gauges_jvm.buffers.direct.capacity(1)_value,1234']),
-                '''[{ "gauges": { "jvm.buffers.direct.capacity": [
-                {"value": 215415},{"value": 1234}]}}]''',
-                OK_CODE)
-            self.check_data(
-                rules.dash_q(
-                    ['(*)_gauges_jvm.buffers.direct.capacity(1)_value,1234']),
-                '''[{ "gauges": { "jvm.buffers.direct.capacity": [
-                {"value": 215415},{"value": 1234}]}},
-                { "gauges": { "jvm.buffers.direct.capacity": [
-                {"value": 215415},{"value": 1235}]}}]''',
-                WARNING_CODE)
-    unittest.main()
-    exit(0)
-
-"""Program entry point"""
-if __name__ == "__main__":
-    args = parseArgs()
-    nagios = NagiosHelper()
     if args.version:
         print('Version: %s - Date: %s' % (__version__, __version_date__))
-        exit(0)
+        sys.exit(0)
 
     if args.ssl:
         url = "https://%s" % args.host
@@ -698,30 +550,31 @@ if __name__ == "__main__":
             context.verify_mode = ssl.CERT_NONE
         else:
             context.verify_mode = ssl.CERT_OPTIONAL
+            context.load_default_certs()
             if args.cacert:
                 try:
                     context.load_verify_locations(args.cacert)
                 except ssl.SSLError:
                     nagios.append_unknown(
-                    ''' Error loading SSL CA cert "%s"!'''
+                        'Error loading SSL CA cert "%s"!'
                         % args.cacert)
 
             if args.cert:
                 try:
-                    context.load_cert_chain(args.cert,keyfile=args.key)
+                    context.load_cert_chain(args.cert, keyfile=args.key)
                 except ssl.SSLError:
                     if args.key:
                         nagios.append_unknown(
-                        ''' Error loading SSL cert. Make sure key "%s" belongs to cert "%s"!'''
+                            'Error loading SSL cert. Make sure key "%s" belongs to cert "%s"!'
                             % (args.key, args.cert))
                     else:
                         nagios.append_unknown(
-                        ''' Error loading SSL cert. Make sure "%s" contains the key as well!'''
+                            'Error loading SSL cert. Make sure "%s" contains the key as well!'
                             % (args.cert))
 
         if nagios.getCode() != OK_CODE:
             print(nagios.getMessage())
-            exit(nagios.getCode())
+            sys.exit(nagios.getCode())
 
     else:
         url = "http://%s" % args.host
@@ -729,13 +582,16 @@ if __name__ == "__main__":
         url += ":%s" % args.port
     if args.path:
         url += "/%s" % args.path
+
     debugPrint(args.debug, "url:%s" % url)
     json_data = ''
+
     try:
-        req = urllib2.Request(url)
+        req = urllib.request.Request(url)
         req.add_header("User-Agent", "check_http_json")
         if args.auth:
-            base64str = base64.encodestring(args.auth).replace('\n', '')
+            authbytes = str(args.auth).encode()
+            base64str = base64.encodebytes(authbytes).decode().replace('\n', '')
             req.add_header('Authorization', 'Basic %s' % base64str)
         if args.headers:
             headers = json.loads(args.headers)
@@ -743,19 +599,23 @@ if __name__ == "__main__":
             for header in headers:
                 req.add_header(header, headers[header])
         if args.timeout and args.data:
-            response = urllib2.urlopen(req, timeout=args.timeout,
+            response = urllib.request.urlopen(req, timeout=args.timeout,
                                               data=args.data, context=context)
         elif args.timeout:
-            response = urllib2.urlopen(req, timeout=args.timeout,
+            response = urllib.request.urlopen(req, timeout=args.timeout,
                                               context=context)
         elif args.data:
-            response = urllib2.urlopen(req, data=args.data, context=context)
+            response = urllib.request.urlopen(req, data=args.data, context=context)
         else:
-            response = urllib2.urlopen(req, context=context)
+            response = urllib.request.urlopen(req, context=context)
 
         json_data = response.read()
 
     except HTTPError as e:
+        # 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))
@@ -777,6 +637,11 @@ if __name__ == "__main__":
 
     # Print Nagios specific string and exit appropriately
     print(nagios.getMessage())
-    exit(nagios.getCode())
+    sys.exit(nagios.getCode())
+
+
+if __name__ == "__main__":
+    # Program entry point
+    main(sys.argv[1:])
 
 #EOF

contrib/icinga2_check_command_definition.conf

@@ -0,0 +1,106 @@
+object CheckCommand "http_json" {
+		import "plugin-check-command"
+
+		command = [ PluginDir + "/check_http_json.py" ]
+
+		arguments = {
+		"--host" = {
+			value = "$address$"
+			description = "Hostname or address of the interface to query"
+			required = true
+		}
+		"--port" = {
+			value = "$http_json_port$"
+			description = "TCP port number"
+		}
+		"--path" = {
+			value = "$http_json_path$"
+			description = "URL path to query (i.e.: /v1/service/xyz)"
+		}
+		"--timeout" = {
+			value = "$http_json_timeout$"
+			description = "Connection timeout (seconds)"
+		}
+		"--basic-auth" = {
+			value = "$http_json_basic_auth$"
+			description = "Basic auth string 'username:password'"
+		}
+		"--ssl" = {
+			set_if = "$http_json_ssl$"
+			description = "use TLS to connect to remote host"
+		}
+		"--insecure" = {
+			set_if = "$http_json_insecure$"
+			description = "do not check server SSL certificate"
+		}
+		"--cacert" = {
+			value = "$http_json_cacert_file$"
+			description = "path of cacert file to validate server cert"
+		}
+		"--cert" = {
+			value = "$http_json_cert_file$"
+			description = "client certificate in PEM format"
+		}
+		"--key" = {
+			value = "$http_json_key_file$"
+			description = "client certificate key file in PEM format ( if not bundled into the cert )"
+		}
+		"--data" = {
+			value = "$http_json_post_data$"
+			description = "the http payload to send as a POST"
+		}
+		"--headers" = {
+			value = "$http_json_headers$"
+			description = "additional http headers in JSON format to send with the request"
+		}
+		"--field_separator" = {
+			value = "$http_json_field_separator$"
+			description = "JSON Field separator, defaults to '.'; Select element in an array with '(' ')'"
+		}
+		"--value_separator" = {
+			value = "$http_json_value_separator$"
+			description = "JSON Value separator, defaults to ':'"
+		}
+		"--warning" = {
+			value = "$http_json_warning$"
+			description = "Warning threshold for these values, WarningRange is in the format [@]start:end"
+		}
+		"--critical" = {
+			value = "$http_json_critical$"
+			description = "Critical threshold for these values, CriticalRange is in the format [@]start:end"
+		}
+		"--key_exists" = {
+			value = "$http_json_key_exists$"
+			description = "Checks existence of these keys to determine status. Return warning if key is not present."
+		}
+		"--key_exists_critical" = {
+			value = "$http_json_key_exists_critical$"
+			description = "Checks existence of these keys to determine status. Return critical if key is not present."
+		}
+		"--key_equals" = {
+			value = "$http_json_key_equals$"
+			description = "Checks equality of these keys and values. Return warning if equality check fails"
+		}
+		"--key_equals_critical" = {
+			value = "$http_json_key_equals_critical$"
+			description = "Checks equality of these keys and values. Return critical if equality check fails"
+		}
+		"--key_equals_unknown" = {
+			value = "$http_json_key_equals_unknown$"
+			description = "Checks equality of these keys and values. Return unknown if equality check fails"
+		}
+		"--key_not_equals" = {
+			value = "$http_json_key_not_equals$"
+			description = "Checks equality of these keys and values (key[>alias],value key2,value2) to determine status. Multiple key values can be delimited with colon (key,value1:value2). Return warning if equality check succeeds."
+		}
+		"--key_not_equals_critical" = {
+			value = "$http_json_key_not_equals_critical$"
+			description = "Checks equality of these keys and values (key[>alias],value key2,value2) to determine status. Multiple key values can be delimited with colon (key,value1:value2). Return critical if equality check succeeds."
+		}
+		"--key_metric" = {
+			value = "$http_json_key_metric$"
+			description = "Gathers the values of these keys"
+		}
+	}
+}
+

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_args.py

@@ -0,0 +1,34 @@
+#!/usr/bin/env python3
+
+
+import unittest
+import sys
+
+sys.path.append('..')
+
+from check_http_json import *
+
+
+class ArgsTest(unittest.TestCase):
+    """
+    Tests for argsparse
+    """
+
+    def test_parser_defaults(self):
+        parser = parseArgs(['-H', 'foobar'])
+        self.assertFalse(parser.debug)
+        self.assertFalse(parser.ssl)
+        self.assertFalse(parser.insecure)
+
+    def test_parser_with_debug(self):
+        parser = parseArgs(['-H', 'foobar', '-d'])
+        self.assertTrue(parser.debug)
+
+    def test_parser_with_port(self):
+        parser = parseArgs(['-H', 'foobar', '-P', '8888'])
+        self.assertEqual(parser.port, '8888')
+
+    def test_parser_with_separator(self):
+        parser = parseArgs(['-H', 'foobar', '-f', '_', '-F', '_'])
+        self.assertEqual(parser.separator, '_')
+        self.assertEqual(parser.value_separator, '_')

test/test_check_http_json.py

@@ -0,0 +1,296 @@
+#!/usr/bin/env python3
+
+
+import json
+import unittest
+from unittest.mock import patch
+import sys
+
+sys.path.append('..')
+
+from check_http_json import *
+
+
+OK_CODE = 0
+WARNING_CODE = 1
+CRITICAL_CODE = 2
+UNKNOWN_CODE = 3
+
+
+class RulesHelper:
+    separator = '.'
+    value_separator = ':'
+    debug = False
+    key_threshold_warning = None
+    key_value_list = None
+    key_value_list_not = None
+    key_list = None
+    key_threshold_critical = None
+    key_value_list_critical = None
+    key_value_list_not_critical = None
+    key_value_list_unknown = None
+    key_list_critical = None
+    metric_list = None
+
+    def dash_m(self, data):
+        self.metric_list = data
+        return self
+
+    def dash_e(self, data):
+        self.key_list = data
+        return self
+
+    def dash_E(self, data):
+        self.key_list_critical = data
+        return self
+
+    def dash_q(self, data):
+        self.key_value_list = data
+        return self
+
+    def dash_Q(self, data):
+        self.key_value_list_critical = data
+        return self
+
+    def dash_y(self, data):
+        self.key_value_list_not = data
+        return self
+
+    def dash_Y(self, data):
+        self.key_value_list_not_critical = data
+        return self
+
+    def dash_U(self, data):
+        self.key_value_list_unknown = data
+        return self
+
+    def dash_w(self, data):
+        self.key_threshold_warning = data
+        return self
+
+    def dash_c(self, data):
+        self.key_threshold_critical = data
+        return self
+
+
+class UtilTest(unittest.TestCase):
+    """
+    Tests for the util fucntions
+    """
+
+    rules = RulesHelper()
+
+    def check_data(self, args, jsondata, code):
+        data = json.loads(jsondata)
+        nagios = NagiosHelper()
+        processor = JsonRuleProcessor(data, args)
+        nagios.append_warning(processor.checkWarning())
+        nagios.append_critical(processor.checkCritical())
+        nagios.append_metrics(processor.checkMetrics())
+        nagios.append_unknown(processor.checkUnknown())
+        self.assertEqual(code, nagios.getCode())
+
+    def test_metrics(self):
+        self.check_data(RulesHelper().dash_m(['metric,,1:4,1:5']),
+                        '{"metric": 5}', WARNING_CODE)
+        self.check_data(RulesHelper().dash_m(['metric,,1:5,1:4']),
+                        '{"metric": 5}', CRITICAL_CODE)
+        self.check_data(RulesHelper().dash_m(['metric,,1:5,1:5,6,10']),
+                        '{"metric": 5}', CRITICAL_CODE)
+        self.check_data(RulesHelper().dash_m(['metric,,1:5,1:5,1,4']),
+                        '{"metric": 5}', CRITICAL_CODE)
+        self.check_data(RulesHelper().dash_m(['metric,s,@1:4,@6:10,1,10']),
+                        '{"metric": 5}', OK_CODE)
+        self.check_data(RulesHelper().dash_m(['(*).value,s,1:5,1:5']),
+                        '[{"value": 5},{"value": 100}]', CRITICAL_CODE)
+        self.check_data(RulesHelper().dash_m(['metric>foobar,,1:4,1:5']),
+                        '{"metric": 5}', WARNING_CODE)
+
+    def test_unknown(self):
+        self.check_data(RulesHelper().dash_U(['metric,0']),
+                        '{"metric": 3}', UNKNOWN_CODE)
+
+    def test_exists(self):
+        self.check_data(RulesHelper().dash_e(['nothere']),
+                        '{"metric": 5}', WARNING_CODE)
+        self.check_data(RulesHelper().dash_E(['nothere']),
+                        '{"metric": 5}', CRITICAL_CODE)
+        self.check_data(RulesHelper().dash_e(['metric']),
+                        '{"metric": 5}', OK_CODE)
+
+    def test_equality(self):
+        self.check_data(RulesHelper().dash_q(['metric,6']),
+                        '{"metric": 5}', WARNING_CODE)
+        self.check_data(RulesHelper().dash_Q(['metric,6']),
+                        '{"metric": 5}', CRITICAL_CODE)
+        self.check_data(RulesHelper().dash_q(['metric,5']),
+                        '{"metric": 5}', OK_CODE)
+
+    def test_equality_colon(self):
+        """
+        See https://github.com/drewkerrigan/nagios-http-json/issues/43
+        """
+        rules = RulesHelper()
+        rules.value_separator = '_'
+
+        # This should not fail
+        self.check_data(rules.dash_q(['metric,foo:bar']),
+                        '{"metric": "foo:bar"}', OK_CODE)
+
+    def test_non_equality(self):
+        self.check_data(RulesHelper().dash_y(['metric,6']),
+                        '{"metric": 6}', WARNING_CODE)
+        self.check_data(RulesHelper().dash_Y(['metric,6']),
+                        '{"metric": 6}', CRITICAL_CODE)
+        self.check_data(RulesHelper().dash_y(['metric,5']),
+                        '{"metric": 6}', OK_CODE)
+
+    def test_warning_thresholds(self):
+        self.check_data(RulesHelper().dash_w(['metric,5']),
+                        '{"metric": 5}', OK_CODE)
+        self.check_data(RulesHelper().dash_w(['metric,5:']),
+                        '{"metric": 5}', OK_CODE)
+        self.check_data(RulesHelper().dash_w(['metric,~:5']),
+                        '{"metric": 5}', OK_CODE)
+        self.check_data(RulesHelper().dash_w(['metric,1:5']),
+                        '{"metric": 5}', OK_CODE)
+        self.check_data(RulesHelper().dash_w(['metric,@5']),
+                        '{"metric": 6}', OK_CODE)
+        self.check_data(RulesHelper().dash_w(['metric,@5:']),
+                        '{"metric": 4}', OK_CODE)
+        self.check_data(RulesHelper().dash_w(['metric,@~:5']),
+                        '{"metric": 6}', OK_CODE)
+        self.check_data(RulesHelper().dash_w(['metric,@1:5']),
+                        '{"metric": 6}', OK_CODE)
+        self.check_data(RulesHelper().dash_w(['metric,5']),
+                        '{"metric": 6}', WARNING_CODE)
+        self.check_data(RulesHelper().dash_w(['metric,5:']),
+                        '{"metric": 4}', WARNING_CODE)
+        self.check_data(RulesHelper().dash_w(['metric,~:5']),
+                        '{"metric": 6}', WARNING_CODE)
+        self.check_data(RulesHelper().dash_w(['metric,1:5']),
+                        '{"metric": 6}', WARNING_CODE)
+        self.check_data(RulesHelper().dash_w(['metric,@5']),
+                        '{"metric": 5}', WARNING_CODE)
+        self.check_data(RulesHelper().dash_w(['metric,@5:']),
+                        '{"metric": 5}', WARNING_CODE)
+        self.check_data(RulesHelper().dash_w(['metric,@~:5']),
+                        '{"metric": 5}', WARNING_CODE)
+        self.check_data(RulesHelper().dash_w(['metric,@1:5']),
+                        '{"metric": 5}', WARNING_CODE)
+        self.check_data(RulesHelper().dash_w(['(*).value,@1:5']),
+                        '[{"value": 5},{"value": 1000}]', WARNING_CODE)
+
+    def test_critical_thresholds(self):
+        self.check_data(RulesHelper().dash_c(['metric,5']),
+                        '{"metric": 5}', OK_CODE)
+        self.check_data(RulesHelper().dash_c(['metric,5:']),
+                        '{"metric": 5}', OK_CODE)
+        self.check_data(RulesHelper().dash_c(['metric,~:5']),
+                        '{"metric": 5}', OK_CODE)
+        self.check_data(RulesHelper().dash_c(['metric,1:5']),
+                        '{"metric": 5}', OK_CODE)
+        self.check_data(RulesHelper().dash_c(['metric,@5']),
+                        '{"metric": 6}', OK_CODE)
+        self.check_data(RulesHelper().dash_c(['metric,@5:']),
+                        '{"metric": 4}', OK_CODE)
+        self.check_data(RulesHelper().dash_c(['metric,@~:5']),
+                        '{"metric": 6}', OK_CODE)
+        self.check_data(RulesHelper().dash_c(['metric,@1:5']),
+                        '{"metric": 6}', OK_CODE)
+        self.check_data(RulesHelper().dash_c(['metric,5']),
+                        '{"metric": 6}', CRITICAL_CODE)
+        self.check_data(RulesHelper().dash_c(['metric,5:']),
+                        '{"metric": 4}', CRITICAL_CODE)
+        self.check_data(RulesHelper().dash_c(['metric,~:5']),
+                        '{"metric": 6}', CRITICAL_CODE)
+        self.check_data(RulesHelper().dash_c(['metric,1:5']),
+                        '{"metric": 6}', CRITICAL_CODE)
+        self.check_data(RulesHelper().dash_c(['metric,@5']),
+                        '{"metric": 5}', CRITICAL_CODE)
+        self.check_data(RulesHelper().dash_c(['metric,@5:']),
+                        '{"metric": 5}', CRITICAL_CODE)
+        self.check_data(RulesHelper().dash_c(['metric,@~:5']),
+                        '{"metric": 5}', CRITICAL_CODE)
+        self.check_data(RulesHelper().dash_c(['metric,@1:5']),
+                        '{"metric": 5}', CRITICAL_CODE)
+        self.check_data(RulesHelper().dash_c(['(*).value,@1:5']),
+                        '[{"value": 5},{"value": 1000}]', CRITICAL_CODE)
+
+    def test_separator(self):
+        rules = RulesHelper()
+        rules.separator = '_'
+        self.check_data(
+            rules.dash_q(
+                ['(0)_gauges_jvm.buffers.direct.capacity(1)_value,1234']),
+            '''[{ "gauges": { "jvm.buffers.direct.capacity": [
+            {"value": 215415},{"value": 1234}]}}]''',
+            OK_CODE)
+        self.check_data(
+            rules.dash_q(
+                ['(*)_gauges_jvm.buffers.direct.capacity(1)_value,1234']),
+            '''[{ "gauges": { "jvm.buffers.direct.capacity": [
+            {"value": 215415},{"value": 1234}]}},
+            { "gauges": { "jvm.buffers.direct.capacity": [
+            {"value": 215415},{"value": 1235}]}}]''',
+            WARNING_CODE)
+
+    def test_array_with_missing_element(self):
+        """
+        See https://github.com/drewkerrigan/nagios-http-json/issues/34
+        """
+        rules = RulesHelper()
+
+        # This should simply work
+        data = '[{"Node": "there"}]'
+        self.check_data(rules.dash_q(['(0).Node,there']), data, OK_CODE)
+
+        # This should warn us
+        data = '[{"Node": "othervalue"}]'
+        self.check_data(rules.dash_q(['(0).Node,there']), data, WARNING_CODE)
+
+        # # This should not throw an IndexError
+        data = '[{"Node": "foobar"}]'
+        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', '(2).Node,alsomissing']), data, WARNING_CODE)
+
+        # This should not throw a KeyError
+        data = '{}'
+        self.check_data(rules.dash_q(['(0).Node,foobar', '(1).Node,missing']), data, CRITICAL_CODE)
+
+    def test_subelem(self):
+
+        rules = RulesHelper()
+        data = '{"foo": {"foo": {"foo": "bar"}}}'
+
+        self.check_data(rules.dash_E(['foo.foo.foo.foo.foo']), data, CRITICAL_CODE)
+
+    def test_subarrayelem_missing_elem(self):
+
+        rules = RulesHelper()
+        data = '[{"capacity": {"value": 1000}},{"capacity": {"value": 2200}}]'
+
+        self.check_data(rules.dash_E(['(*).capacity.value']), data, OK_CODE)
+        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

@@ -0,0 +1,97 @@
+#!/usr/bin/env python3
+
+
+import unittest
+import unittest.mock as mock
+import sys
+import os
+
+sys.path.append('..')
+
+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
+    """
+
+    @mock.patch('builtins.print')
+    def test_main_version(self, mock_print):
+        args = ['--version']
+
+        with self.assertRaises(SystemExit) as test:
+            main(args)
+
+        mock_print.assert_called_once()
+        self.assertEqual(test.exception.code, 0)
+
+    @mock.patch('builtins.print')
+    @mock.patch('urllib.request.urlopen')
+    def test_main_with_ssl(self, mock_request, mock_print):
+        args = '-H localhost --ssl'.split(' ')
+
+        mock_request.return_value = MockResponse()
+
+        with self.assertRaises(SystemExit) as test:
+            main(args)
+
+        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)

test/test_nagioshelper.py

@@ -0,0 +1,51 @@
+#!/usr/bin/env python3
+
+
+import json
+import unittest
+from unittest.mock import patch
+import sys
+
+sys.path.append('..')
+
+from check_http_json import *
+
+
+class NagiosHelperTest(unittest.TestCase):
+    """
+    Tests for the NagiosHelper
+    """
+
+    def test_getcode_default(self):
+
+        helper = NagiosHelper()
+        self.assertEqual(0, helper.getCode())
+
+    def test_getcode_warning(self):
+
+        helper = NagiosHelper()
+        helper.warning_message = 'foobar'
+        self.assertEqual(1, helper.getCode())
+
+    def test_getcode_critical(self):
+
+        helper = NagiosHelper()
+        helper.critical_message = 'foobar'
+        self.assertEqual(2, helper.getCode())
+
+    def test_getcode_unknown(self):
+
+        helper = NagiosHelper()
+        helper.unknown_message = 'foobar'
+        self.assertEqual(3, helper.getCode())
+
+    def test_getmessage_default(self):
+
+        helper = NagiosHelper()
+        self.assertEqual('OK: Status OK.', helper.getMessage())
+
+    def test_getmessage_perfomance_data(self):
+
+        helper = NagiosHelper()
+        helper.performance_data = 'foobar'
+        self.assertEqual('OK: foobar Status OK. |foobar', helper.getMessage())