Crawling images from a webpage

2013-04-08

First extract the url of images
craw.py

import urllib2, re
req = urllib2.Request('http://yourwebsite.com/path/to/webpage')
website = urllib2.urlopen(req)

html = website.read()

# Read all png files
imgs = re.findall('"((http)s?://.*?.png)"', text)
for i in imgs:
    print i[0]

Django - Redirect URL to facebook oAuth

2013-04-05

In your views.py

from django.http import HttpResponse
from projectname import settings
from urllib import urlencode

def index(request):
    params = {
        'client_id': settings.FACEBOOK_APP_ID,
        'redirect_uri': 'https://www.facebook.com/yourappname/app_' + settings.FACEBOOK_APP_ID,
        'scope': 'email,user_birthday,offline_access,publish_stream',
    }
    redirect_url = 'https://www.facebook.com/dialog/oauth/?' + urlencode(params)
    redirect_code = """
        <script type="text/javascript">
        top.location.href = '%s';
        </script>
    """ % redirect_url;

    return HttpResponse(redirect_code, mimetype='text/html')

Python: Make a GET request to get JSON data

2013-04-04

Make a HTTP request to get JSON content from website.

Create a file json_helper.py

import urllib2
import json

def get_json_by_user_id(user_id):
    header = {'Content-Type': 'application/json',}
    req = urllib2.Request('http://www.example.com/getmyjson?user_id=' + user_id)
    website = urllib2.urlopen(req)

    return json.loads(website.read())

Create Facebook page app using Django with Nginx

2013-04-01

This is continue from previous post.

Enable SSL

As we know that Facebook app required SSL, so first we must self-sign a certificate

Setup Django/mysql in Ubuntu server in VMWare Fusion

2013-03-29

Basically the goal is To create a web application that run on VMWare using Python/Django with MySql, and able to accessed by the host OS.

iOS - Create UITableView with custom cell programmatically

2013-03-22

Personally, I don’t like to use Xcode’s interface builder. I felt that everything programmatically will be easier to debug.

This post is share about create table view and custom table cell.

NSInvalidArgumentException caused by UITableViewCell

2013-03-02

I keep hitting an error like this

2013-03-02 18:34:52.488 StoreSearch[84541:c07] -[UITableViewCell nameLabel]: unrecognized selector sent to instance 0x6a7d880
2013-03-02 18:34:52.489 StoreSearch[84541:c07] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[UITableViewCell nameLabel]: unrecognized selector sent to instance 0x6a7d880'
*** First throw call stack:
(0x14ab052 0xeabd0a 0x14acced 0x1411f00 0x1411ce2 0x3717 0xb4e0f 0xb5589 0xa0dfd 0xaf851 0x5a322 0x14ace72 0x1d6e92d 0x1d78827 0x1cfefa7 0x1d00ea6 0x1d00580 0x147f9ce 0x1416670 0x13e24f6 0x13e1db4 0x13e1ccb 0x1394879 0x139493e 0x1ba9b 0x20bd 0x1fe5)
terminate called throwing an exception(lldb)

Restrict Git commit message to certain pattern

2013-02-26

For certain reason, some time you want your commit message to follow a standard pattern.

i.e. PJK-001: my message

Want to have a project code and assignment code there.

SQL - SELECT SUM joined with another table

2013-02-06

I had always face a scenerio like this:

There are 2 tables

1 2	user(id, first_name, last_name) transaction(id, qty, user_id)

Vim - Set indentation based on file type

2013-02-05

Let say now you want your .js (JavaScript) file to 2 space indent.

Create a file named javascript.vim (NOT js.vim)

Js' Technical Blog

Enable SSL