logger.js•2.27 kB
import winston from 'winston';
import path from 'path';
import os from 'os';
import fs from 'fs'; // Import fs for directory creation
// Determine the appropriate log directory
let logDir;
if (process.env.NODE_ENV === 'development') {
logDir = '.'; // Current directory for development
} else {
// Use platform-specific app data directory
const platform = os.platform();
if (platform === 'win32') {
logDir = process.env.APPDATA || path.join(os.homedir(), 'AppData', 'Roaming');
} else if (platform === 'darwin') {
logDir = path.join(os.homedir(), 'Library', 'Application Support');
} else { // Linux and other Unix-like
logDir = process.env.XDG_CONFIG_HOME || path.join(os.homedir(), '.config');
}
}
const appLogDir = path.join(logDir, 'mcp-server-logs');
// Ensure the log directory exists
try {
if (!fs.existsSync(appLogDir)) {
fs.mkdirSync(appLogDir, { recursive: true });
}
} catch (error) {
// Fallback to console if directory creation fails, to avoid crashing the app
console.error(`Failed to create log directory at ${appLogDir}:`, error);
// Potentially, we could have a very basic console-only logger here as a fallback
// For now, winston will likely error out if it can't write to files,
// but the console transport (if added) might still work.
}
const logger = winston.createLogger({
level: 'info',
format: winston.format.combine(
winston.format.timestamp({
format: 'YYYY-MM-DD HH:mm:ss'
}),
winston.format.errors({ stack: true }),
winston.format.splat(),
winston.format.json()
),
defaultMeta: { service: 'mcp-server' },
transports: [
new winston.transports.File({ filename: path.join(appLogDir, 'error.log'), level: 'error' }),
new winston.transports.File({ filename: path.join(appLogDir, 'application.log') })
],
exceptionHandlers: [
new winston.transports.File({ filename: path.join(appLogDir, 'exceptions.log') })
],
rejectionHandlers: [
new winston.transports.File({ filename: path.join(appLogDir, 'rejections.log') })
]
});
// Create a stream object with a 'write' function that will be used by morgan or other stream-based loggers
logger.stream = {
write: function(message) {
logger.info(message.trim());
},
};
export default logger;
