Function requestLogger

lib/plugins/requestLogger.js:42–88

* Sets up a child [logger](https://github.com/pinojs/pino) logger with * the current request id filled in, along with any other parameters you define. * * You can pass in no options to this, in which case only the request id will be * appended, and no serializers appended (this is also the most

(options)

 * }));
 */
function requestLogger(options) {
    assert.optionalObject(options);
    var opts = options || {};

    var props;

    if (opts.properties) {
        props = shallowCopy(opts.properties);
    } else {
        props = {};
    }

    if (opts.serializers) {
        props.serializers = opts.serializers;
    }

    var headersToCopy = opts.headers || [];
    const requestIdFieldName = opts.requestIdFieldName || 'req_id';

    return function logger(req, res, next) {
        if (!req.log && !opts.log) {
            next();
            return;
        }

        var log = req.log || opts.log;

        props[requestIdFieldName] = req.getId();

        headersToCopy.forEach(function forEach(k) {
            if (req.headers[k]) {
                props[k] = req.headers[k];
            }
        });
        const childOptions = {};
        if (props.serializers) {
            childOptions.serializers = props.serializers;
        }
        req.log = log.child(props, childOptions);

        if (props[requestIdFieldName]) {
            delete props[requestIdFieldName];
        }

        next();
    };
}

///--- Exports