app.js

exports.getMessage = async (event, context) => {
    if (tableName == null) {
        tableName = process.env.TABLE_NAME;
    }
    params = {
        TableName: tableName,
        Key: {
            "date": event.pathParameters.date,
            "time": event.queryStringParameters.time
        }
    };
    console.debug(params.Key);

    return await new Promise((resolve, reject) => {
        docClient.get(params, (error, data) => {
            if (error) {
                console.error(`getMessage ERROR=${error.stack}`);
                resolve({
                    statusCode: 400,
                    error: `Could not get messages: ${error.stack}`
                });
            } else {
                console.info(`getMessage data=${JSON.stringify(data)}`);
                resolve({
                    statusCode: 200,
                    body: JSON.stringify(data)
                });
            }
        });
    });
};