remix-utils/build/server/middleware/logger.js

This package contains simple utility functions to use with [React Router](https://reactrouter.com/).

function defaultFormatMessage(request, response, responseTime) {
    let { method } = request;
    let url = new URL(request.url);
    let status = response.status;
    if (status >= 300 && status < 400) {
        let target = response.headers.get("location");
        return `${method} ${url.pathname}${url.search} → ${target}`;
    }
    return `${method} ${url.pathname}${url.search} ${status} ${responseTime} ms`;
}
export function unstable_createLoggerMiddleware({ logger = console, precision = 3, formatMessage = defaultFormatMessage, } = {}) {
    if (precision < 0) {
        throw new RangeError("Precision must be a positive number.");
    }
    return [
        async function loggerMiddleware({ request }, next) {
            let start = performance.now();
            let response = await next();
            let responseTime = (performance.now() - start).toPrecision(precision);
            let status = response.status;
            if (status >= 500) {
                logger.error(formatMessage(request, response, responseTime));
            }
            else if (status >= 400) {
                logger.warn(formatMessage(request, response, responseTime));
            }
            else if (status >= 300) {
                logger.debug(formatMessage(request, response, responseTime));
            }
            else {
                logger.info(formatMessage(request, response, responseTime));
            }
            return response;
        },
    ];
}
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