Lorin - Express Logger

Lorin is a lightweight, dependency-free Express.js middleware for colorful, categorized logging of API requests, with both console output and file storage.

Installation

npm install lorin

Usages

API Middleware

Logs every incoming request, including the time, protocol, method, endpoint, status code, and the time taken by your server (in ms). It also stores the log in the .logs/api.log file.

import { loggerMiddleware } from "lorin";
import express from "express";

const app = express();

app.use(loggerMiddleware); // use the middleware before using your app routers & endpoints

Sample console output:

General logger

This can be used to highlight specific events, such as server restarts, database connections, and more. The logs are stored in the corresponding files mentioned below.

import { logger } from "lorin";

logger.info("App started"); // informational or general logs
logger.success("Successfully connect to DB"); // success logs
logger.warn("Lorin 1.x is outdated"); // warn logs
logger.error("Unable to connect to the DB"); // failure or error logs

Sample console output:

Log levels & paths

Lorin offers different log levels, each with a specific console color and default file storage location.

API middleware

For API middleware logs, all logs are stored in .logs/api.log.

| Status Code | Description | Console Color | | ----------- | ---------------------- | ------------- | | 200-299 | Successful responses | Green | | 300-399 | Redirection messages | Cyan | | 400-499 | Client error responses | Red | | 500-599 | Server error responses | BG-Red |

General logger

| Log method | Description | Console color | File path | | ---------- | ---------------------------------- | ------------- | ------------------- | | info | General information logs | Cyan | .logs/info.log | | success | Successful operations logs | Green | .logs/success.log | | warn | Warnings, potential issues logs | Yellow | .logs/warn.log | | error | Errors, failures, or critical logs | Red | .logs/error.log |