Node.js Http Server

Lightweight Node.js http wrapper around the mion router, it takes care of handling the http requests and passing them down to the router.

It is not a generic http server and does not support common scenarios like file uploads, path params or even query params. Is custom tailored form mion APIs so it can be lightweight and fast.

npm install
npm i @mionkit/http

Init a Node Server

init Node
import {NodeHttpOptions, setNodeHttpOpts, startNodeServer} from '@mionkit/http';
import './myApi.routes';

// set options specific for node
const nodeOptions: Partial<NodeHttpOptions> = {port: 8080};

// init node server
import {RpcError} from '@mionkit/core';
import {Routes, RouterOptions, initRouter, registerRoutes} from '@mionkit/router';
import {clientRoutes} from '@mionkit/common';

export type User = {id: string; name: string; surname: string};
export type Order = {id: string; date: Date; userId: string; totalUSD: number};

export const routes = {
    auth: {
        headerName: 'authorization',
        hook: (ctx, token: string): void => {
            if (!token) throw new RpcError({statusCode: 401, message: 'Not Authorized', name: ' Not Authorized'});
    users: {
        getById: (ctx, id: string): User => ({id, name: 'John', surname: 'Smith'}),
        delete: (ctx, id: string): string => id,
        create: (ctx, newUser: Omit<User, 'id'>): User => ({id: 'USER-123', ...newUser}),
    orders: {
        getById: (ctx, id: string): Order => ({id, date: new Date(), userId: 'USER-123', totalUSD: 120}),
        delete: (ctx, id: string): string => id,
        create: (ctx, newOrder: Omit<Order, 'id'>): Order => ({id: 'ORDER-123', ...newOrder}),
    utils: {
        sum: (ctx, a: number, b: number): number => a + b,
        sayHello: (ctx, user: User): string => `Hello ${} ${user.surname}`,
    log: {
        forceRunOnError: true,
        hook: (ctx): void => {
            const now =;
            console.log(now, ctx.path, ctx.response.statusCode);
            if (ctx.request.internalErrors.length) console.error(now, ctx.path, ctx.request.internalErrors);
} satisfies Routes;

// set options and init router
export const routerOptions: Partial<RouterOptions> = {prefix: 'api/v1'};

// register routes and exporting the type of the Api (used by the client)
export const myApi = registerRoutes(routes);
export type MyApi = typeof myApi;

// register routes required by client
// these routes serve metadata required for validation and serialization on the client
Quick Tip:
It is a good idea to split the routes definition and server initialization code so mion can be easily configured to run on multiple environments!

Type Reference


Basic options to configure mion router. These options are independent of the environment mion is being used (server or serverless).

export interface RouterOptions<Req = any, SharedData = any> extends CoreOptions {
    /** prefix for all routes, i.e: api/v1.
     * path separator is added between the prefix and the route */
    prefix: string;
    /** suffix for all routes, i.e: .json.
     * Not path separators is added between the route and the suffix */
    suffix: string;
    /** Transform the path before finding a route */
    pathTransform?: (request: Req, path: string) => string;
    /** factory function to initialize shared call context data */
    sharedDataFactory?: SharedDataFactory<SharedData>;
    /** enable automatic parameter validation, defaults to true */
    enableValidation: boolean;
    /** Enables serialization/deserialization */
    enableSerialization: boolean;
    /** Reflection and Deepkit Serialization-Validation options */
    reflectionOptions: ReflectionOptions;
    /** Custom JSON parser, defaults to Native js JSON */
    bodyParser: JsonParser;
    /** Used to return public data structure when adding routes */
    getPublicRoutesData: boolean;
    /** automatically generate and uuid */
    autoGenerateErrorId: boolean;


export interface NodeHttpOptions {
    protocol: 'http' | 'https';
    port: number;
    /** Native node's ServerOptions. By default maxHeaderSize defaults to 8KB, same as in latest node versions */
    options: ServerOptions;
    /** Set of default response header to add to every response*/
    defaultResponseHeaders: Record<string, string>;
     * 256KB by default, same as lambda payload
     * @link
     * */
    maxBodySize: number; // default 256KB