logctx/dist/src/middleware/logctxMiddleware.js

A Pino-based logger with context-aware logging using async_hooks

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.createContextLogger = void 0;
const Context_1 = require("../Context");
const uuid_1 = require("uuid");
/**
 * Middleware to create a context logger for a request.
 * It extracts specified headers, query parameters, and cookies,
 * and runs the next middleware with the context set.
 *
 * @param request - The incoming request object.
 * @param next - The next middleware function to call.
 * @param options - Options to specify which headers, queries, and cookies to include in the context.
 */
function createContextLogger(request, next, options = {}) {
    const requestId = request.headers?.['x-request-id'] || (0, uuid_1.v4)();
    const headerContext = Object.fromEntries((options.headers || []).map((key) => [key, request.headers?.[key.toLowerCase()]]));
    const queryContext = Object.fromEntries((options.queries || []).map((key) => [key, request.query?.[key]]));
    const cookieContext = Object.fromEntries((options.cookies || []).map((key) => [key, request.cookies?.[key]]));
    const paramContext = Object.fromEntries((options.params || []).map((key) => [key, request.params?.[key]]));
    const context = {
        requestId: String(requestId),
        method: request.method,
        path: request.path || request.url,
        ...headerContext,
        ...queryContext,
        ...cookieContext,
        ...paramContext,
    };
    console.log('Context created:', context);
    (0, Context_1.runWithContext)(context, () => {
        next();
    });
}
exports.createContextLogger = createContextLogger;