eventEmitter - Lets get that event emitted

eventEmitter a clone of node's own events.EventEmitter now compatible in Node and all major browsers .

Check out in Github .

Google app engine for java with eclipse and hello world

Installing stuffs in linux is not a joke , well apart from the addiction of solving the little intricacies which the kernel puts in our way sometimes you just can't get the kernel do what you want to do !


Having said that, i tried incorporating google app engine plugin with eclipse indigo which by default is available from the ubuntu software center. Some hours and few cusswords later i finally gave up and used juno.

So lets begin
1.Download juno from link
2.Running it is pretty cool , just click the executable and viola , but for the viola moment you need to have java installed.

sudo apt-get  install openjdk-7-jre
and
sudo apt-get install openjdk-7-jdk

3.Move the extracted eclipse folder to /opt
sudo mv eclipse /opt/

4.Create a eclipse.desktop file and move to /usr/share/applications with contents

[Desktop Entry]
Type=Application
Name=Eclipse
Comment=Eclipse Integrated Development Environment
Icon=eclipse
Exec=eclipse
Terminal=false
Categories=Development;IDE;Java;

5.Make a symlink at /usr/local/bin by

cd /usr/local/bin
and
sudo ln -s /opt/eclipse/eclipse

6.We are done installing juno , you can now search eclipse in dashboard or run via terminal


Now lets get a hello world running

In Eclipse choose help->install new software
and use https://dl.google.com/eclipse/plugin/4.2 to install
  Google Plugin for Eclipse (required)   
  and
  SDKs->Google App Engine Java SDK 1.9.7    1.9.7




Once that is done we need to download the GWT SDK from
download

Then go to window->preference->google->web toolkit
use the 'Add' button to browse the location where you have extracted and submit.

We are done , you can create projects using
file->new -> project -> google-> web application project

Good luck

A browser extension to view gif's full screen , just hovering on the links !!

Get the Extension here :
https://chrome.google.com/webstore/detail/gif-zoomer/nakcifhfddgcnodcojohbnjeiccikdjc

A innocent looking webpage with gif links




Just hover on any of these gif links (.gif)

A webcrawler to detect 404 , using scrapy in python

Well i was recently presented with a problem of mitigating the ironic 404 pages for a web domain .

What best then to use a web crawler to crawl all the domain pages and observing the response !!

We shall summon scrapy spiders to do our biddings .

You can install it by

$ sudo apt-get install python-pip python-dev libffi-dev libxslt1-dev libxslt1.1 libxml2-dev libxml2 libssl-dev

$sudo pip install Scrapy

$sudo pip install service_identity

Then start the project by ,
$ scrapy startproject Project_name

This will create the directory structure :
Project_name/
    scrapy.cfg
    Project_name/
        __init__.py
        items.py
        pipelines.py
        settings.py
        spiders/
            __init__.py
           

Under spiders , create a python script with any name , and compose the soul of the spider

For the 404 you can use this





import scrapy
from scrapy.contrib.spiders import CrawlSpider, Rule
from scrapy.contrib.linkextractors.sgml import SgmlLinkExtractor
from scrapy.selector import *
from scrapy.item import Item, Field

class Item(scrapy.Item):
    title = Field()
    link = Field()
    response = Field()
    refer = Field()

class MySpider(CrawlSpider):
    name = "AcrazySpiderofDoom"
    allowed_domains = ["www.domain.com"]
    start_urls = ["http://www.domain.com/"]

    rules = (Rule (SgmlLinkExtractor(allow=(),unique=True)
    , callback="parse_items", follow= True),
    )



    def parse_items(self,response):
        item = Item()
            item ["title"] = response.xpath('//title').extract()[0]
            item ["link"] = response.url
        item ["response"] = response.status
        item ["refer"] = response.request.headers['referer']
        return item



Thats it, Give it life by

$ scrapy crawl AcrazySpiderofDoom


You can even make it enter the data to a csv by $ scrapy crawl AcrazySpiderofDoom -o items.csv









Example screen grab of running the crawler for partypoker.com

Once completed (I killed it here) , it will also provide valuable statistics

The Demarcator facebook app , a new clutter free feed viewer

The Demarcator app presents the recent feeds on your wall in a categorized ,tabular way. Feeds from different sources are displayed in different tabs. It also allows a user to load more feeds directly in a particular tab (this feature is currently unavailable for personal feeds (user's and friends')). This is a beta version and we appreciate any feedback from you. (Send your feedback to ageekycrusade@gmail.com)


Lets cut the clutter !!!

Try it now : https://apps.facebook.com/demarcate/