def index()

in run/image-processing/main.py [0:0]

• 35 lines of code
• 10 McCabe index (conditional complexity)

def index():
    """Receive and parse Pub/Sub messages containing Cloud Storage event data."""
    envelope = request.get_json()
    if not envelope:
        msg = "no Pub/Sub message received"
        print(f"error: {msg}")
        return f"Bad Request: {msg}", 400

    if not isinstance(envelope, dict) or "message" not in envelope:
        msg = "invalid Pub/Sub message format"
        print(f"error: {msg}")
        return f"Bad Request: {msg}", 400

    # Decode the Pub/Sub message.
    pubsub_message = envelope["message"]

    if isinstance(pubsub_message, dict) and "data" in pubsub_message:
        try:
            data = json.loads(base64.b64decode(pubsub_message["data"]).decode())

        except Exception as e:
            msg = (
                "Invalid Pub/Sub message: "
                "data property is not valid base64 encoded JSON"
            )
            print(f"error: {e}")
            return f"Bad Request: {msg}", 400

        # Validate the message is a Cloud Storage event.
        if not data["name"] or not data["bucket"]:
            msg = (
                "Invalid Cloud Storage notification: "
                "expected name and bucket properties"
            )
            print(f"error: {msg}")
            return f"Bad Request: {msg}", 400

        try:
            image.blur_offensive_images(data)
            return ("", 204)

        except Exception as e:
            print(f"error: {e}")
            return ("", 500)

    return ("", 500)