@nutrient-sdk/dws-mcp-server/dist/logger.js

MCP server for Nutrient DWS Processor API

import { AsyncLocalStorage } from 'node:async_hooks';
import { join } from 'node:path';
import { tmpdir } from 'node:os';
import winston from 'winston';
const asyncLocalStorage = new AsyncLocalStorage();
/**
 * Sets the request ID used for logging for the current asynchronous execution context.
 */
export function setRequestId(requestId) {
    const store = asyncLocalStorage.getStore();
    if (store) {
        store.requestId = requestId;
        return;
    }
    asyncLocalStorage.enterWith({ requestId });
}
function getRequestId() {
    const store = asyncLocalStorage.getStore();
    return store?.requestId ?? null;
}
const customMessageFormat = winston.format.printf(({ level, message, timestamp, service: _service, ...meta }) => {
    const requestId = getRequestId();
    const serializedMessage = typeof message === 'string' ? message : JSON.stringify(message);
    const metaStr = Object.keys(meta).length > 0 ? ' ' + JSON.stringify(meta) : '';
    if (requestId) {
        return `${timestamp} [${level}]: ${serializedMessage}${metaStr} requestId=${requestId}`;
    }
    return `${timestamp} [${level}]: ${serializedMessage}${metaStr}`;
});
const isStdioMode = process.env.MCP_TRANSPORT !== 'http';
const logFilePath = process.env.MCP_LOG_FILE || (isStdioMode ? join(tmpdir(), 'nutrient-dws-mcp-server.log') : undefined);
function createTransports() {
    // In stdio mode, Console transport interferes with MCP protocol — use file only
    if (logFilePath) {
        return [
            new winston.transports.File({
                filename: logFilePath,
                format: winston.format.combine(winston.format.timestamp({ format: 'HH:mm:ss.SSS' }), customMessageFormat),
            }),
        ];
    }
    return [
        new winston.transports.Console({
            format: winston.format.combine(winston.format.timestamp({ format: 'HH:mm:ss.SSS' }), winston.format.colorize(), winston.format.json(), customMessageFormat),
        }),
    ];
}
export const logger = winston.createLogger({
    level: process.env.LOG_LEVEL ?? 'info',
    format: winston.format.json(),
    defaultMeta: { service: 'dws-mcp-server' },
    transports: createTransports(),
});