Introduction to treport-logger

The treport-logger library is a powerful and flexible logging tool for modern JavaScript and Node.js applications. It offers a wide range of features that make logging, debugging, and monitoring easier. In this guide, we will dive deep into its API with useful code snippets and examples.

Getting Started

First, you need to install treport-logger:

npm install treport-logger

Now, let’s explore some of the basic functionalities:

Creating a Basic Logger

 const logger = require('treport-logger');
logger.info('Information message'); logger.warn('Warning message'); logger.error('Error message'); 

Advanced Configuration

 const config = {
  level: 'debug',
  transports: [
    new logger.transports.Console(),
    new logger.transports.File({ filename: 'app.log' })
  ]
}; const advancedLogger = logger.createLogger(config);
advancedLogger.debug('Debug message'); 

Logging HTTP Requests

 const http = require('http'); const middlewareLogger = require('treport-logger').createLogger(config);
const server = http.createServer((req, res) => {
  middlewareLogger.info(`${req.method} ${req.url}`);
  res.end('Hello World');
});
server.listen(3000, () => {
  middlewareLogger.info('Server is listening on port 3000');
}); 

Custom Transports

 class CustomTransport {
  log(info, callback) {
    // custom logging logic here
    callback();
  }
}
const customLogger = logger.createLogger({
  transports: [new CustomTransport()]
});
customLogger.info('Using custom transport'); 

Building an Application Using treport-logger

Let’s build a small application to demonstrate how to integrate treport-logger:

 const express = require('express'); const app = express(); const logger = require('treport-logger').createLogger(config);
app.use((req, res, next) => {
  logger.info(`Received ${req.method} request for ${req.url}`);
  next();
});
app.get('/', (req, res) => {
  logger.debug('Handling GET /');
  res.send('Hello, World!');
});
app.listen(4000, () => {
  logger.info('App running on port 4000');
}); 

With this setup, we can easily see incoming requests and simple operations happening within our application.

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