Node.js 201

building real web and CMS applicationsin pure JavaScript

Tom Boutell @boutell punkave.com

Hello World?

● Goodbye

● Well… how about a simple real app?

10 PRINT “HELLO WORLD”20 GOTO 1030 REM WHO CARES

bike-me-nowa simple mobile web app for Philly’s rideindego bike sharing system

bike-me-now.boutell.com

● built with Nick Weber at Code For Philly

● basic express server with a route

● also static server

● request module for talking to APIs

● lodash filtering

web browser

sends requestsfull pages, ajax

node process

serves requests

“node is the webserver” (*)

“Node barely does anything”

node event loop

send thingsreceive thingssomething new happens...

your callbacks

do as little as possibleset up more callbacks

node in production (at some scale)

web browser

sends requestsfull pages, ajax

node process

does dynamic things

nginx

(or apache, or…)

node process

does dynamic things

static files

dynamic

filesystem

static files

load balancing

salsadelphia.com

a directory of upcoming salsa nights

source code:

https://github.com/boutell/salsadelphia

salsadelphia.com

● for philly’s salsa dance community

● facebook authentication with passport

● middleware

● mongodb

● more lodash filtering

livin’ the async life

● the “async” npm module

● series, each, eachSeries, eachLimit

● sublimetext snippets

● alternatives: promises, async functions

creating command line tools

● prettiest: persistence and locking

● mechanic: manage nginx with node○ higher level tools = good

○ sometimes it’s OK to be synchronous

orbweaver holodeck

orbweaver (npm module)

● a simple but robust web crawler

● parallel accesses

● simulating users

● async.queue

● holodeck (also an npm module)

express-cache-on-demand

● mind-bending middleware

● shortest possible cache lifetime

● use in website projects

● in npm

kickshirts

● crawls kickstarter

● cheerio: lightweight jQuery for the server

● extracting data with familiar techniques

● no longer running, but open source

● https://github.com/punkave/kickshirts

apostrophenow.org

● apostrophe: an open source node CMS

● the sandbox project

● working with schemas

● adding new content types

● areas, singletons and templates

stagecoach

● simple deployment system

● multicore support

● github.com/punkave/stagecoach

uploadfs (in npm)

● uploaded files have to go somewhere

● filesystem back end

● Amazon S3 back end

● transparent in Apostrophe

browserify: node(ish) in the browser

● async-merge-sort module○ people as comparison functions

● “guided search” example

● limitations of browserify

Thanks!

http://punkave.com/http://justjs.com/

http://apostrophenow.org/

@boutell