const fs = require('fs');

const path = require('path');

// Default configuration

const defaultConfig = {

logLevel: 'info', // 'debug', 'info', 'warn', 'error'

logFilePath: 'http_request_log.txt',

includePaths: ['/api/*'], // Paths to include in logging

};

let config = defaultConfig;

// Load configuration from file

try {

const configFilePath = path.join(__dirname, 'config.json');

if (fs.existsSync(configFilePath)) {

const configData = require(configFilePath);

config = { ...defaultConfig, ...configData }; // Merge configs

}

} catch (err) {

console.warn('Failed to load config.json, using default config.');

}

// Function to log HTTP requests

function logHttpRequest(url, method, headers, body, status, startTime, endTime) {

const logMessage = `[${new Date().toISOString()}] ${method} ${url} Status: ${status} Time: ${endTime - startTime}ms`;

if (config.logLevel === 'debug') {

console.debug(logMessage); // Log to console for debug level

} else if (config.logLevel === 'info') {

fs.appendFile(config.logFilePath, logMessage + '\n', (err) => {

if (err) {

console.error('Error writing to log file:', err);

}

});

} else if (config.logLevel === 'warn') {

console.warn(logMessage);

} else if (config.logLevel === 'error') {

console.error(logMessage);

}

}

// Example usage (replace with your actual HTTP request handling)

const http = require('http');

const server = http.createServer((req, res) => {

const url = req.url;

const method = req.method;

const headers = req.headers;

let body = '';

req.on('data', (chunk) => {

body += chunk;

});

req.on('end', () => {

const startTime = Date.now();

//Check if the path is in includePaths

if(config.includePaths.some(includePath => url.startsWith(includePath))){

logHttpRequest(url, method, headers, body, res.statusCode, startTime, Date.now());

}

res.writeHead(200, { 'Content-Type': 'text/plain' });

res.end('Hello, World!\n');

});

});

server.listen(3000, () => {

console.log('Server listening on port 3000');

});