add dingtalk and aiops alert

[netkey]

add dingtalk and aiops alert

[nsano-rururu]

Alert type not added to README.md and elastalert.rst

[nsano-rururu]

The description of the alerter setting added to ruletypes.rst has not been added.

[nsano-rururu]

No test code has been added.

testcode example

from elastalert.alerts import DingTalkAlerter
from elastalert.util import EAException
from requests import RequestException

def test_dingtalk():
    rule = {
        'name': 'Test DingTalk Rule',
        'type': 'any',
        'dingtalk_webhook': 'http://xxxxxxxxxx/xxxxxxxx',
        'dingtalk_msgtype': 'text',
        'alert': []
    }
    rules_loader = FileRulesLoader({})
    rules_loader.load_modules(rule)
    alert = DingTalkAlerter(rule)
    match = {
        '@timestamp': '2021-01-01T00:00:00',
        'somefield': 'foobarbaz'
    }
    with mock.patch('requests.post') as mock_post_request:
        alert.alert([match])
    expected_data = {
        'msgtype': 'text',
        'text': {'content': 'Test DingTalk Rule\n\n@timestamp: 2021-01-01T00:00:00\nsomefield: foobarbaz\n'},
        'at': {'isAtAll': False}
    }

    mock_post_request.assert_called_once_with(
        'http://xxxxxxxxxx/xxxxxxxx',
        data=mock.ANY,
        headers={
            'Content-Type': 'application/json',
            'Accept': 'application/json;charset=utf-8'
        },
    )

    actual_data = json.loads(mock_post_request.call_args_list[0][1]['data'])
    assert expected_data == actual_data

def test_dingtalk_ea_exception():
    with pytest.raises(EAException) as ea:
        rule = {
            'name': 'Test DingTalk Rule',
            'type': 'any',
            'dingtalk_webhook': 'http://xxxxxxxxxx/xxxxxxxx',
            'dingtalk_msgtype': 'text',
            'alert': []
        }
        rules_loader = FileRulesLoader({})
        rules_loader.load_modules(rule)
        alert = DingTalkAlerter(rule)
        match = {
            '@timestamp': '2021-01-01T00:00:00',
            'somefield': 'foobarbaz'
        }
        mock_run = mock.MagicMock(side_effect=RequestException)
        with mock.patch('requests.post', mock_run), pytest.raises(RequestException):
            alert.alert([match])
    assert 'Error request to Dingtalk: ' in str(ea)

def test_dingtalk_getinfo():
    rule = {
        'name': 'Test DingTalk Rule',
        'type': 'any',
        'dingtalk_webhook': 'http://xxxxxxxxxx/xxxxxxxx',
        'dingtalk_msgtype': 'text',
        'alert': [],
        'alert_subject': 'Test DingTalk'
    }
    rules_loader = FileRulesLoader({})
    rules_loader.load_modules(rule)
    alert = DingTalkAlerter(rule)

    expected_data = {
        'type': 'dingtalk',
        "dingtalk_webhook": 'http://xxxxxxxxxx/xxxxxxxx'
    }
    actual_data = alert.get_info()
    assert expected_data == actual_data

@pytest.mark.parametrize('dingtalk_webhook, dingtalk_msgtype, expected_data', [
    ('x', '', 'Missing required option(s): dingtalk_webhook, dingtalk_msgtype'),   
    ('', 'x', 'Missing required option(s): dingtalk_webhook, dingtalk_msgtype'),
])
def test_dingtalk_required_error(dingtalk_webhook, dingtalk_msgtype, expected_data):
    try:
        rule = {
            'name': 'Test DingTalk Rule',
            'type': 'any',
            'alert': [],
            'alert_subject': 'Test DingTalk'
        }

        if dingtalk_webhook:
            rule['dingtalk_webhook'] = dingtalk_webhook
        if dingtalk_msgtype:
            rule['dingtalk_msgtype'] = dingtalk_msgtype

        rules_loader = FileRulesLoader({})
        rules_loader.load_modules(rule)
        alert = DingTalkAlerter(rule)

        actual_data = alert.get_info()
        assert expected_data == actual_data
    except Exception as ea:
        assert expected_data in str(ea)

[nsano-rururu]

lint error

./elastalert/alerts.py:2188:1: E302 expected 2 blank lines, found 1
./elastalert/alerts.py:2214:26: E231 missing whitespace after ':'
./elastalert/alerts.py:2219:25: E128 continuation line under-indented for visual indent
./elastalert/alerts.py:2220:25: E128 continuation line under-indented for visual indent
./elastalert/alerts.py:2232:1: E302 expected 2 blank lines, found 1
./elastalert/alerts.py:2253:1: W191 indentation contains tabs
./elastalert/alerts.py:2253:1: E101 indentation contains mixed spaces and tabs
./elastalert/alerts.py:2254:1: W191 indentation contains tabs
./elastalert/alerts.py:2254:1: E101 indentation contains mixed spaces and tabs
./elastalert/alerts.py:2255:1: W191 indentation contains tabs
./elastalert/alerts.py:2255:1: E101 indentation contains mixed spaces and tabs
./elastalert/alerts.py:2257:1: W191 indentation contains tabs
./elastalert/alerts.py:2257:1: E101 indentation contains mixed spaces and tabs
./elastalert/alerts.py:2261:25: E128 continuation line under-indented for visual indent
./elastalert/alerts.py:2262:25: E128 continuation line under-indented for visual indent
./elastalert/loaders.py:82:37: W291 trailing whitespace