morpress.js/src/errorHandler.js

A simple API framework without dependencies

// src/errorHandler.js
const fs = require('fs');
const path = require('path');

class ErrorHandler {
    constructor(logFilePath = path.join(__dirname, 'errors.log')) {
        this.logFilePath = logFilePath;
    }

    handle(err, req, res) {
        this.logError(err, req);

        const statusCode = this.getStatusCode(err);
        res.statusCode = statusCode;
        res.setHeader('Content-Type', 'application/json');
        res.end(JSON.stringify({
            error: this.getErrorType(err),
            message: err.message
        }));
    }

    logError(err, req) {
        const logMessage = `
            [${new Date().toISOString()}] ${req.method} ${req.url}
            Error: ${err.message}
            Stack: ${err.stack}
        `;

        fs.appendFile(this.logFilePath, logMessage + '\n', (fileErr) => {
            if (fileErr) console.error('Failed to write to log file:', fileErr);
        });
    }

    getStatusCode(err) {
        return err.statusCode || 500;
    }

    getErrorType(err) {
        return err.name || 'Internal Server Error';
    }
}

module.exports = new ErrorHandler();