CloudWatch events are not handled by Zappa

CloudWatch events triggering lambda functions are not being handled by Zappa. The events contain a json with the following format: {'awslogs': {'data': 'Dmt.....EA'}} which fails to match any of the conditions in the LambdaHandler.handler function.

Context

When configuring CloudWatch to trigger a Lambda function deployed by Zappa, I can see Zappa receiving the event and calling LambdaHandler.handler():

START RequestId: 850...e9a Version: $LATEST
Instancing..
[DEBUG] 2019-08-30T18:02:42.685Z 850...e9a Zappa Event: {'awslogs': {'data': 'H4sIA...AAA='}}
END RequestId: 850...e9a
REPORT RequestId: 850...e9a Duration: 2.53 ms Billed Duration: 100 ms Memory Size: 512 MB Max Memory Used: 67 MB

but my configured handler function is not called.

Expected Behavior

My configured function in zappa_settings.json should be executed 🌟

Actual Behavior

My function is not executed ⛈

Possible Fix

Add a new if condition in the handler function to look for the awslogs key in the event object/dict and trigger the configured handler function.

Steps to Reproduce

Create and deploy a lambda function with Zappa. Add a simple print statement in the handler to confirm that the function is triggered.
Create a CloudWatch log subscription filter that triggers the lambda function (see here)
Push data to the log that triggers the subscription filter: aws logs put-subscription-filter \ --log-group-name myLogGroup \ --filter-name demo \ --filter-pattern "" \ --destination-arn arn:aws:lambda:region:123456789123:function:helloworld
The lambda function will be executed, but the handler function will not.

Your Environment

Zappa version used: 0.48.2
Operating System and Python version: Python 3.6.5

The output of pip freeze:

argcomplete==1.9.3
boto3==1.9.195
botocore==1.12.195
certifi==2019.6.16
cfn-flip==1.2.1
chardet==3.0.4
Click==7.0
docutils==0.15.1
durationpy==0.5
future==0.16.0
hjson==3.0.1
idna==2.8
jmespath==0.9.3
kappa==0.6.0
lambda-packages==0.20.0
placebo==0.9.0
python-dateutil==2.6.1
python-slugify==1.2.4
PyYAML==5.1.1
requests==2.22.0
s3transfer==0.2.1
six==1.12.0
toml==0.10.0
tqdm==4.19.1
troposphere==2.4.9
Unidecode==1.1.1
urllib3==1.25.3
Werkzeug==0.15.5
wsgi-request-logger==0.4.6
zappa==0.48.2

Link to your project (optional):

Your zappa_settings.py:

APP_MODULE='notify'
APP_FUNCTION='handler'
EXCEPTION_HANDLER=None
DEBUG=True
LOG_LEVEL='DEBUG'
BINARY_SUPPORT=True
CONTEXT_HEADER_MAPPINGS={}
DOMAIN=None
BASE_PATH=None
ENVIRONMENT_VARIABLES={'AWS_REGION': 'us-east-1'}
API_STAGE='prd'
PROJECT_NAME='test-zappa-production'
SETTINGS_FILE=None
DJANGO_SETTINGS=None
AWS_EVENT_MAPPING={}
AWS_BOT_EVENT_MAPPING={}
COGNITO_TRIGGER_MAPPING={}
ASYNC_RESPONSE_TABLE=''

Miserlou / Zappa