Patch botocore to log API calls + parameters

boto3_patch.py

import boto3
import botocore
from botocore.client import BaseClient, Config, ClientMeta
import json


def log_api(self, operation_name, api_params):
    meta: ClientMeta = self.meta
    print(
        json.dumps(
            {
                "service": meta.service_model.service_id,
                "operation": operation_name,
                "params": api_params,
                "region": meta.region_name,
            },
            indent=4,
        )
    )
    return original_call(self, operation_name, api_params)


original_call = BaseClient._make_api_call
BaseClient._make_api_call = log_api

if __name__ == "__main__":
    # example using S3 Head bucket
    s3 = boto3.client("s3", config=Config(signature_version=botocore.UNSIGNED))
    bucket = s3.head_bucket(Bucket="flaws.cloud")
    print(bucket["ResponseMetadata"]["HTTPHeaders"]["x-amz-bucket-region"])
    
    """
    expected output from log_api is:
    {
        "service": "S3",
        "operation": "HeadBucket",
        "params": {
            "Bucket": "flaws.cloud"
        },
        "region": "us-east-1"
    }
    """