A lean and mean realtime api server

npm install pico-server
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NPM version


A lean and mean realtime api server


  • two channel design, push and pull channel to achieve fast and realtime http server
  • data cache to prevent data lost (WIP)
  • efficent user session handling, session only persistence when pull channel dc
  • supported bath requests
  • server stream data to client through push channel


  1. mkdir [PROJ_DIR]
  2. cd [PROJ_DIR]
  3. sudo npm install pico-server -g
  4. npm link pico-server
  5. mkdir app # all your server code should goes here

Create a Hello World Server

  1. mkdir -p app/config app/actions # create minimal project folders
  2. touch app/config/master.json app/config/worker.json
  3. paste this to your master.json

         "name": "YOUR_PROJECT_NAME",
         "env": "dev",
         "elements": []
         "config": "config/worker",
  4. paste this to your worker.json

         "name": "YOUR_PROJECT_NAME",
         "env": "dev",
         "elements": ["actions"]
  5. vi app/index.js # create server entry point

    var pico = require('pico-server');
    // pico.createApp('/var/nodes/YOUR_PROJ_DIR/app', 'config/master');
    pico.createApp('PATH/TO/APP/', 'CONFIG/PATH');
  6. vi app/actions/index.js

    module.exports = [
  7. vi app/actions/foobar.js

    function hello(session, order, cb){
     var model = session.getModel('foobar');
     model['me'] = 'world';
         [[session.createModelInfo('foobar', 'me')]]
    exports.setup = function(context, next){
     var web = context.webServer;
     web.route('Hello', [hello]);
  8. run the server in YOUR_PROJ_DIR

    node app
  9. run following curl command on your local machine

    curl -X POST -H "Content-Type: application/json" -d '[{"api":"Hello","reqId":1,"data":""}]' http://YOUR_SERVER_IP:5678/pull


    pico server has two types of configuration files, master process configuration and worker process configuration. every pico server must has one master process and zero to unlimited numbers of worker processes.

    Web Server Config

  10. webServer: module instance name, compulsary but name can be any

  11. mod: module name, compulsary, must use "web" for web server
  12. pfx: ssl cert path relative to app folder, if available, https protocol will be used
  13. allowOrigin: cross origin policy, if not not available, allowOrigin is set to *
  14. secretKey: request hash key, optional, if not available, request hash will not be checked
  15. cullAge: request time check, optional, if not available, +- 1 hour allowanceis given
  16. delimiter: for client without ajax, delimiter can be added to separate response, optional
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