Node.JS + Socket.IO + Redis + Python

Pasos ejecutados en Ubuntu 13.10

Download & Build

$ git clone https://github.com/joyent/node.git
$ git branch my-v0.10.26-release origin/v0.10.26-release
$ git checkout my-v0.10.26-release
$ ./configure --prefix=/usr/local/node/nodejs-v0.10.26
$ make test
$ make doc
$ make install
$ export PATH=/usr/local/node/nodejs-v0.10.26/bin:$PATH

Intall Nodeclipse

http://www.nodeclipse.org/updates/

$ npm install -g nodeclipse
npm http GET https://registry.npmjs.org/nodeclipse
npm http GET https://registry.npmjs.org/nodeclipse
npm http GET https://registry.npmjs.org/nodeclipse
npm ERR! network tunneling socket could not be established, cause=140431497983808:error:140770FC:SSL routines:SSL23_GET_SERVER_HELLO:unknown protocol:../deps/openssl/openssl/ssl/s23_clnt.c:766:
npm ERR! network 
npm ERR! network This is most likely not a problem with npm itself
npm ERR! network and is related to network connectivity.
npm ERR! network In most cases you are behind a proxy or have bad network settings.
npm ERR! network 
npm ERR! network If you are behind a proxy, please make sure that the
npm ERR! network 'proxy' config is set properly.  See: 'npm help config'

npm ERR! System Linux 3.11.0-17-generic
npm ERR! command "/usr/local/node/nodejs-v0.10.26/bin/node" "/usr/local/node/nodejs-v0.10.26/bin/npm" "install" "-g" "nodeclipse"
npm ERR! cwd /home/horacio
npm ERR! node -v v0.10.26
npm ERR! npm -v 1.4.3
npm ERR! code ECONNRESET
npm ERR! 
npm ERR! Additional logging details can be found in:
npm ERR!     /home/horacio/npm-debug.log
npm ERR! not ok code 0

FIX: quitar variables de entorno de configuracion de proxy

$ unset http_proxy 

$ unset https_proxy 

$ npm install -g nodeclipse

(...)

nodeclipse@0.10.10 /usr/local/node/nodejs-v0.10.26/lib/node_modules/nodeclipse

├── shelljs@0.2.6

└── optimist@0.6.1 (wordwrap@0.0.2, minimist@0.0.8)

$ npm install -g express

(...)

express@3.4.8 /usr/local/node/nodejs-v0.10.26/lib/node_modules/express

├── methods@0.1.0

├── merge-descriptors@0.0.1

├── range-parser@0.0.4

├── cookie-signature@1.0.1

├── fresh@0.2.0

├── debug@0.7.4

├── buffer-crc32@0.2.1

├── cookie@0.1.0

├── mkdirp@0.3.5

├── commander@1.3.2 (keypress@0.1.0)

├── send@0.1.4 (mime@1.2.11)

└── connect@2.12.0 (uid2@0.0.3, pause@0.0.1, qs@0.6.6, bytes@0.2.1, raw-body@1.1.2, batch@0.5.0, negotiator@0.3.0, multiparty@2.2.0)

$ npm install -g coffee-script

(...)

nodeclipse@0.10.10 /usr/local/node/nodejs-v0.10.26/lib/node_modules/nodeclipse

├── shelljs@0.2.6

└── optimist@0.6.1 (wordwrap@0.0.2, minimist@0.0.8)

$ cd /usr/local/java

$ tar xzf /home/horacio/Desktop/jdk-7u51-linux-i586.tar.gz

$ tar xzf /home/horacio/Desktop/eclipse-standard-kepler-SR1-linux-gtk.tar.gz

$ tar xzf /home/horacio/Desktop/eclipse-standard-kepler-SR1-linux-gtk.tar.gz

# Instalar plugin desde: http://www.nodeclipse.org/updates/

# con instrucciones en la seccion

# ... "B) UPDATE SITE (RECOMMENDED WAY: BIGGER CHOICE)"

Install Socket.IO

http://socket.io/

$ npm install socket.io

(...)

socket.io@0.9.16 node_modules/socket.io

├── base64id@0.1.0

├── policyfile@0.0.4

├── redis@0.7.3

└── socket.io-client@0.9.16 (xmlhttprequest@1.4.2, uglify-js@1.2.5, active-x-obfuscator@0.0.1, ws@0.4.31)

Primer proyecto Express

Nombre: first-nodejs-express-project

Template engine: https://github.com/visionmedia/jade

Tutorial: http://expressjs.com/guide.html

Al crear proyecto desde Nodeclipse, en STDOUT aparecio:

  create : /tmp/express-work/1393180273605/first-nodejs-express-project

   create : /tmp/express-work/1393180273605/first-nodejs-express-project/package.json

   create : /tmp/express-work/1393180273605/first-nodejs-express-project/app.js

   create : /tmp/express-work/1393180273605/first-nodejs-express-project/public

   create : /tmp/express-work/1393180273605/first-nodejs-express-project/public/javascripts

   create : /tmp/express-work/1393180273605/first-nodejs-express-project/public/images

   create : /tmp/express-work/1393180273605/first-nodejs-express-project/public/stylesheets

   create : /tmp/express-work/1393180273605/first-nodejs-express-project/public/stylesheets/style.css

   create : /tmp/express-work/1393180273605/first-nodejs-express-project/routes

   create : /tmp/express-work/1393180273605/first-nodejs-express-project/routes/index.js

   create : /tmp/express-work/1393180273605/first-nodejs-express-project/routes/user.js

   create : /tmp/express-work/1393180273605/first-nodejs-express-project/views

   create : /tmp/express-work/1393180273605/first-nodejs-express-project/views/layout.jade

   create : /tmp/express-work/1393180273605/first-nodejs-express-project/views/index.jade

   install dependencies:

     $ cd /tmp/express-work/1393180273605/first-nodejs-express-project && npm install

   run the app:

     $ node app

Redis + SocketIO

Cliente sugerido: https://github.com/mranney/node_redis
Previamente (por las dudas) instale los siguientes paquetes:

• libhiredis0.10
• libhiredis-dev

$ npm install hiredis
(...)
hiredis@0.1.16 node_modules/hiredis
└── bindings@1.1.1

$ npm install redis

(...)

redis@0.10.1 node_modules/redis

Pub/Sub Redis + Node.Js

• https://github.com/mranney/node_redis#publish--subscribe
• https://stackoverflow.com/questions/10142246/how-to-design-redis-pub-sub-for-an-instant-messaging-system?rq=1
• https://stackoverflow.com/questions/14115893/nodejs-render-raw-html-with-express
• http://expressjs.com/api.html#res.sendfile
• ejs
• https://github.com/visionmedia/ejs
• http://embeddedjs.com/
• https://stackoverflow.com/questions/4529586/render-basic-html-view-in-node-js-express
• https://stackoverflow.com/questions/8688488/how-does-node-js-render-views
• 
  

Para enviar msg desde cli

$ redis-cli

redis 127.0.0.1:6379> PUBLISH /app/user/123/notifications hola

(integer) 1

Socket.IO: URL customizados en cliente/servidor

https://github.com/LearnBoost/socket.io/wiki/Authorizing

Compartir session con Django-Redis

1) Desde el navegador, solicitar nro. aleatorio

1.1) Desde Python almacenar ID de usuario en REDIS, con un KEY=aleatorio

SET cookie-5ebc3e41-709c-4dc7-857c-15233c96516a user=45 EX 10 NX

2) Con el nro. aleatorio recibido en navegador, crear SocketIO pasando nro. aleatorio

3) Desde NodeJS, obtener desde REDIS el ID de usuario asociado al nro. aleatorio, y subscribirse a URL que contenga dicho numero:

subscriber.subscribe("/app/user/45/notifications");

• Esta solución requiere que los datos estén encriptados (ya que el nro. aleatorio es la clave para que no se puedan leer mensajes de otros usuarios). 

Proxy reverso en Node.JS

• http://machadogj.com/2013/4/error-handling-in-nodejs.html

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