Crafting CloudWatch Logs Lambda Event

craft_lambda_trigger_event.py

import base64
import gzip

import json

event = {
    "logGroup": "/ecs/melvin-dev",
    "logStream": "ecs/melvin-dev/XXXXXXXXXX",
    "owner": 100000000000,
    "logEvents": [{
        "message": "XXX.XXX.XXX.XXX:XXXXX - \"POST / HTTP/1.0\" 200",
        "status_code": 200,
        "scope": {
            "type": "http",
            "http_version": "1.0",
            "server": [
                "XXX.XXX.XXX.XXX",
                12345
            ],
            "client": [
                "XXX.XXX.XXX.XXX",
                12345
            ],
            "scheme": "http",
            "method": "POST",
            "root_path": "",
            "path": "/",
            "raw_path": "b'/'",
            "query_string": "b''",
            "headers": [
                [
                    "b'host'",
                    "b'XXX.XXX.XXX.XXX:12345'"
                ],
                [
                    "b'accept'",
                    "b'application/json'"
                ],
                [
                    "b'accept-language'",
                    "b'en-US,en;q=0.5'"
                ],
                [
                    "b'accept-encoding'",
                    "b'gzip, deflate'"
                ]
            ],
        }
    }]
}

if __name__ == "__main__":
    """
    Crafting CloudWatch Logs event for
    testing Lambda Triggers
    
    Steps:
    1. JSON dumps the event
    2. Encode the return value of (1) into bytes
    3. Gzip compress (2)
    4. Base64 encode (3)
    """
    res = base64.b64encode(gzip.compress(bytes(json.dumps(event), 'utf-8')))
    print(res)