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-e svn+http://code.djangoproject.com/svn/django/branches/releases/1.1.X/#egg=django # -e svn+http://code.djangoproject.com/svn/django/branches/releases/1.1.X/#egg=django
-e bzr+http://code.0xdb.org/python-oxdjango/#egg=python-oxdjango -e bzr+http://code.0xdb.org/python-ox/#egg=python-ox
South # South

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urlweb/.gitignore vendored Normal file
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*.sqlite
*.pyc
.DS_Store
.svn
svn-commit.tmp
svn-prop.tmp

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urlweb/LICENSE Normal file
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Copyright (c) 2009 Nilesh Kapadia
Permission is hereby granted, free of charge, to any person
obtaining a copy of this software and associated documentation
files (the "Software"), to deal in the Software without
restriction, including without limitation the rights to use,
copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the
Software is furnished to do so, subject to the following
conditions:
The above copyright notice and this permission notice shall be
included in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
OTHER DEALINGS IN THE SOFTWARE.

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url-shortener
=============
This is URL shortening application using the Django framework
The shortened URLs use the base 62 value of ids of the model they are
stored in. A count of how many times the URLs are used is kept. The
main page shows the 10 most recent and 10 most popular URLs.
Prerequisites
=============
Download Blueprint from: http://www.blueprintcss.org/
Copy the "blueprint" folder into static/css/ (which you may need to create)
Note that in a production installation, you'll want to have your web
server serve the "static" folder instead of letting Django serve it.
Settings
========
The following values need to be set in settings.py:
SITE_NAME
The name of the site (e.g. 'urlshorteningsite.com')
SITE_BASE_URL
The base URL of the site. This can be based on the SITE_NAME:
SITE_BASE_URL = 'http://' + SITE_NAME + '/'
REQUIRE_LOGIN
Set REQUIRE_LOGIN to True if you want to require that a user be
logged in to be able to submit a URL to be shortened. Set it
to False if you do not want to require login to submit a URL.

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import os
import sys
# redirect sys.stdout to sys.stderr for bad libraries like geopy that uses
# print statements for optional import exceptions.
sys.stdout = sys.stderr
from os.path import abspath, dirname, join
from site import addsitedir
PROJECT_ROOT = abspath(join(dirname(__file__), "../"))
sys.path.insert(0, PROJECT_ROOT)
sys.path.insert(0, abspath(join(dirname(__file__), "../../")))
from django.core.handlers.wsgi import WSGIHandler
os.environ["DJANGO_SETTINGS_MODULE"] = "urlweb.settings"
application = WSGIHandler()

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urlweb/manage.py Executable file
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#!/usr/bin/env python
from django.core.management import execute_manager
try:
import settings # Assumed to be in the same directory.
except ImportError:
import sys
sys.stderr.write("Error: Can't find the file 'settings.py' in the directory containing %r. It appears you've customized things.\nYou'll have to run django-admin.py, passing it your settings module.\n(If the file settings.py does indeed exist, it's causing an ImportError somehow.)\n" % __file__)
sys.exit(1)
if __name__ == "__main__":
execute_manager(settings)

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urlweb/settings.py Normal file
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# Django settings for urlweb project.
import os, logging
#from django.conf.global_settings import TEMPLATE_CONTEXT_PROCESSORS
logging.basicConfig(
level = logging.DEBUG,
format = '%(asctime)s %(levelname)s %(message)s',
)
logging.debug("Reading settings...")
PROJECT_PATH = os.path.abspath(os.path.dirname(__file__))
DEBUG = True
TEMPLATE_DEBUG = DEBUG
ADMINS = (
# ('Your Name', 'your_email@domain.com'),
)
MANAGERS = ADMINS
DATABASE_ENGINE = 'sqlite3' # 'postgresql_psycopg2', 'postgresql', 'mysql', 'sqlite3' or 'oracle'.
#DATABASE_NAME = '' # Or path to database file if using sqlite3.
DATABASE_NAME = os.path.join(PROJECT_PATH, 'database.sqlite')
DATABASE_USER = '' # Not used with sqlite3.
DATABASE_PASSWORD = '' # Not used with sqlite3.
DATABASE_HOST = '' # Set to empty string for localhost. Not used with sqlite3.
DATABASE_PORT = '' # Set to empty string for default. Not used with sqlite3.
# Local time zone for this installation. Choices can be found here:
# http://en.wikipedia.org/wiki/List_of_tz_zones_by_name
# although not all choices may be available on all operating systems.
# If running in a Windows environment this must be set to the same as your
# system time zone.
TIME_ZONE = 'America/Chicago'
# Language code for this installation. All choices can be found here:
# http://www.i18nguy.com/unicode/language-identifiers.html
LANGUAGE_CODE = 'en-us'
SITE_ID = 1
# If you set this to False, Django will make some optimizations so as not
# to load the internationalization machinery.
USE_I18N = True
# Absolute path to the directory that holds media.
# Example: "/home/media/media.lawrence.com/"
MEDIA_ROOT = ''
# URL that handles the media served from MEDIA_ROOT. Make sure to use a
# trailing slash if there is a path component (optional in other cases).
# Examples: "http://media.lawrence.com", "http://example.com/media/"
MEDIA_URL = ''
# URL prefix for admin media -- CSS, JavaScript and images. Make sure to use a
# trailing slash.
# Examples: "http://foo.com/media/", "/media/".
ADMIN_MEDIA_PREFIX = '/media/'
# Make this unique, and don't share it with anybody.
SECRET_KEY = '#### CHANGE_ME ####'
# List of callables that know how to import templates from various sources.
TEMPLATE_LOADERS = (
'django.template.loaders.filesystem.load_template_source',
'django.template.loaders.app_directories.load_template_source',
# 'django.template.loaders.eggs.load_template_source',
)
MIDDLEWARE_CLASSES = (
'django.middleware.common.CommonMiddleware',
'django.contrib.sessions.middleware.SessionMiddleware',
'django.contrib.auth.middleware.AuthenticationMiddleware',
# 'django.middleware.transaction.TransactionMiddleware',
)
ROOT_URLCONF = 'urlweb.urls'
TEMPLATE_DIRS = (
os.path.join(PROJECT_PATH, 'templates')
)
INSTALLED_APPS = (
'django.contrib.auth',
'django.contrib.contenttypes',
'django.contrib.sessions',
'django.contrib.sites',
'django.contrib.admin',
'urlweb.shortener',
)
STATIC_DOC_ROOT = os.path.join(PROJECT_PATH, 'static')
LOGIN_REDIRECT_URL = '/'
#TEMPLATE_CONTEXT_PROCESSORS += (
# 'django.core.context_processors.request',
# )
SITE_NAME = 'localhost:8000'
SITE_BASE_URL = 'http://' + SITE_NAME + '/'
REQUIRE_LOGIN = True
try:
from local_settings import *
except:
pass

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from django.contrib import admin
from urlweb.shortener.models import Link
class LinkAdmin(admin.ModelAdmin):
model = Link
extra = 3
admin.site.register(Link, LinkAdmin)

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urlweb/shortener/baseconv.py Executable file
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"""
Convert numbers from base 10 integers to base X strings and back again.
Original: http://www.djangosnippets.org/snippets/1431/
Sample usage:
>>> base20 = BaseConverter('0123456789abcdefghij')
>>> base20.from_decimal(1234)
'31e'
>>> base20.to_decimal('31e')
1234
"""
class BaseConverter(object):
decimal_digits = "0123456789"
def __init__(self, digits):
self.digits = digits
def from_decimal(self, i):
return self.convert(i, self.decimal_digits, self.digits)
def to_decimal(self, s):
return int(self.convert(s, self.digits, self.decimal_digits))
def convert(number, fromdigits, todigits):
# Based on http://code.activestate.com/recipes/111286/
if str(number)[0] == '-':
number = str(number)[1:]
neg = 1
else:
neg = 0
# make an integer out of the number
x = 0
for digit in str(number):
x = x * len(fromdigits) + fromdigits.index(digit)
# create the result in base 'len(todigits)'
if x == 0:
res = todigits[0]
else:
res = ""
while x > 0:
digit = x % len(todigits)
res = todigits[digit] + res
x = int(x / len(todigits))
if neg:
res = '-' + res
return res
convert = staticmethod(convert)
bin = BaseConverter('01')
hexconv = BaseConverter('0123456789ABCDEF')
base62 = BaseConverter(
'ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789abcdefghijklmnopqrstuvwxyz'
)

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import datetime
from django.db import models
from django.conf import settings
#from django.contrib.auth.models import User
from django import forms
from urlweb.shortener.baseconv import base62
class Link(models.Model):
"""
Model that represents a shortened URL
# Initialize by deleting all Link objects
>>> Link.objects.all().delete()
# Create some Link objects
>>> link1 = Link.objects.create(url="http://www.google.com/")
>>> link2 = Link.objects.create(url="http://www.nileshk.com/")
# Get base 62 representation of id
>>> link1.to_base62()
'B'
>>> link2.to_base62()
'C'
# Set SITE_BASE_URL to something specific
>>> settings.SITE_BASE_URL = 'http://uu4.us/'
# Get short URL's
>>> link1.short_url()
'http://uu4.us/B'
>>> link2.short_url()
'http://uu4.us/C'
# Test usage_count
>>> link1.usage_count
0
>>> link1.usage_count += 1
>>> link1.usage_count
1
"""
url = models.TextField(unique=True, max_length=200000)
date_submitted = models.DateTimeField(default=datetime.datetime.now())
usage_count = models.IntegerField(default=0)
def to_base62(self):
return base62.from_decimal(self.id)
def short_url(self):
return settings.SITE_BASE_URL + self.to_base62()
def __unicode__(self):
return self.to_base62() + ' : ' + self.url
class LinkSubmitForm(forms.Form):
u = forms.CharField(
label='URL to be shortened:',
)

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"""
Tests for views
"""
__test__ = {"doctest": """
# Initialize by deleting all Link objects
>>> from models import Link
>>> Link.objects.all().delete()
>>> from django.test import Client
>>> client = Client()
# Index page
>>> r = client.get('/')
>>> r.status_code # /
200
>>> r.template[0].name
'shortener/index.html'
# Turn off logged-in requirement and set base URL
>>> from django.conf import settings
>>> settings.REQUIRE_LOGIN = False
>>> settings.SITE_BASE_URL = 'http://uu4.us/'
# Empty submission should forward to error page
>>> r = client.get('/submit/')
>>> r.status_code # /submit/
200
>>> r.template[0].name # /submit/
'shortener/submit_failed.html'
# Submit a URL
>>> url = 'http://www.google.com/'
>>> r = client.get('/submit/', {'u': url})
>>> r.status_code # /submit/u?=http%3A%2F%2Fwww.google.com%2F
200
>>> r.template[0].name
'shortener/submit_success.html'
>>> link = r.context[0]['link']
>>> link.to_base62()
'B'
>>> link.short_url()
'http://uu4.us/B'
>>> link_from_db = Link.objects.get(url = url)
>>> base62 = link_from_db.to_base62()
>>> base62
'B'
>>> link_from_db.usage_count
0
# Short URL for previously submitted URL
>>> r = client.get('/' + base62)
>>> r.status_code # '/' + base62
301
>>> r['Location']
'http://www.google.com/'
# Invalid URL should get a 404
>>> r = client.get('/INVALID')
>>> r.status_code # /INVALID
404
# Index now shows link in recent_links / most_popular_links
>>> r = client.get('/')
>>> r.status_code # /
200
>>> r.template[0].name
'shortener/index.html'
>>> context = r.context[0]
>>> len(context['recent_links'])
1
>>> len(context['most_popular_links'])
1
# Get info on Link
>>> r = client.get('/info/' + base62)
>>> r.status_code # info
200
>>> r.template[0].name
'shortener/link_info.html'
>>> link = r.context[0]['link']
>>> link.url
u'http://www.google.com/'
>>> link.usage_count # Usage count should be 1 now
1
"""}

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import logging
from django.contrib.auth.decorators import login_required
from django.contrib.auth import authenticate
from django.views.generic import list_detail
from django.shortcuts import get_object_or_404, get_list_or_404, render_to_response
from django.http import HttpResponse, Http404, HttpResponseRedirect, HttpResponsePermanentRedirect
from django.utils import simplejson
from django.template import RequestContext
from django.views.decorators.http import require_POST
from django.db import transaction
from django.conf import settings
from urlweb.shortener.baseconv import base62
from urlweb.shortener.models import Link, LinkSubmitForm
def follow(request, base62_id):
"""
View which gets the link for the given base62_id value
and redirects to it.
"""
key = base62.to_decimal(base62_id)
link = get_object_or_404(Link, pk = key)
link.usage_count += 1
link.save()
return HttpResponse("<script>window.location = '%s';</script>" % (link.url,));
def default_values(request, link_form=None):
"""
Return a new object with the default values that are typically
returned in a request.
"""
if not link_form:
link_form = LinkSubmitForm()
allowed_to_submit = is_allowed_to_submit(request)
return { 'show_bookmarklet': allowed_to_submit,
'show_url_form': allowed_to_submit,
'site_name': settings.SITE_NAME,
'site_base_url': settings.SITE_BASE_URL,
'link_form': link_form,
}
def info(request, base62_id):
"""
View which shows information on a particular link
"""
key = base62.to_decimal(base62_id)
link = get_object_or_404(Link, pk = key)
values = default_values(request)
values['link'] = link
return render_to_response(
'shortener/link_info.html',
values,
context_instance=RequestContext(request))
def submit(request):
"""
View for submitting a URL
"""
if settings.REQUIRE_LOGIN and not request.user.is_authenticated():
# TODO redirect to an error page
foo = 'foo'
# raise Http404
url = None
link_form = None
if request.GET:
link_form = LinkSubmitForm(request.GET)
elif request.POST:
link_form = LinkSubmitForm(request.POST)
if link_form and link_form.is_valid():
url = link_form.cleaned_data['u']
link = None
try:
link = Link.objects.get(url = url)
except Link.DoesNotExist:
pass
if link == None:
new_link = Link(url = url)
new_link.save()
link = new_link
values = default_values(request)
values['link'] = link
return render_to_response(
'shortener/submit_success.html',
values,
context_instance=RequestContext(request))
values = default_values(request, link_form=link_form)
return render_to_response(
'shortener/submit_failed.html',
values,
context_instance=RequestContext(request))
def index(request):
"""
View for main page (lists recent and popular links)
"""
values = default_values(request)
values['recent_links'] = Link.objects.all().order_by('-date_submitted')[0:10]
values['most_popular_links'] = Link.objects.all().order_by('-usage_count')[0:10]
return render_to_response(
'shortener/index.html',
values,
context_instance=RequestContext(request))
def is_allowed_to_submit(request):
"""
Return true if user is allowed to submit URLs
"""
return not settings.REQUIRE_LOGIN or request.user.is_authenticated()

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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
<head>
<title>404</title>
</head>
<body>
<h1>404 Not Found</h1>
<a href="/">Home</a>
</body>
</html>

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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
<head>
<title>{% block title %}URLs{% endblock %}</title>
<link rel="stylesheet"
href="/static/css/blueprint/screen.css"
type="text/css" media="screen, projection"/>
<link rel="stylesheet"
href="static/css/blueprint/print.css" type="text/css" media="print"/>
<!--[if lt IE 8]>
<link rel="stylesheet"
href="/static/css/blueprint/ie.css"
type="text/css" media="screen, projection"/>
<![endif]-->
<link rel="stylesheet"
href="/static/css/blueprint/plugins/fancy-type/screen.css"
type="text/css" media="screen, projection"/>
<script type="text/javascript"
src="http://ajax.googleapis.com/ajax/libs/jquery/1.3.2/jquery.min.js">
</script>
{% block extra_head %}
{% endblock %}
</head>
<body>
<div class="container">
<div class="span-24 last">
<h1><a href="{{ site_base_url }}">{{ site_name }}</a></h1>
<hr/>
</div>
<div class="span-24 last">
{% block content %}{% endblock %}
<hr/>
</div>
<div class="span-19 colborder">
{% if show_url_form %}
{% block url_form %}
<form name="url_form" action="/submit/" method="get">
{{ link_form.as_p }}
<input type="submit" value="Submit" />
</form>
{% endblock %}
{% endif %}
</div>
<div class="span-4 last">
{% if show_bookmarklet %}
{% block bookmarklet %}
<br/>
Bookmarklet (drag this to your bookmarks bar):<br/>
<a href="javascript:(function(){var a=window,b=document,c=encodeURIComponent;d=a.open(&#39;{{ site_base_url }}submit/?u=&#39;+c(b.location));})();">Shorten with {{ site_name }}</a>
{% endblock %}
{% endif %}
</div>
{% block extra_body %}{% endblock %}
</div>
</body>
</html>

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{% extends "base.html" %}
{% block content %}
<h2>Recent Links</h2>
<ul>
{% for link in recent_links %}
<li><a href="{{ link.short_url }}">{{ link.url }}</a> (Score: {{ link.usage_count }})
(<a href="{% url shortener.views.info link.to_base62 %}">Info</a>)</li>
{% endfor %}
</ul>
<h2>Most Popular Links</h2>
<ul>
{% for link in most_popular_links %}
<li><a href="{{ link.short_url }}">{{ link.url }}</a> (Score: {{ link.usage_count }})
(<a href="{% url shortener.views.info link.to_base62 %}">Info</a>)</li>
{% endfor %}
</ul>
{% endblock %}
{% block extra_body %}
<script>
$(document).ready(
function() {
$("#id_u").focus().select();
});
</script>
{% endblock %}

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{% extends "base.html" %}
{% block title %}Link info{% endblock %}
{% block content %}
<p>
<a href="{{ link.short_url }}">{{ link.url }}</a> (Score: {{ link.usage_count }})
<br/>
<br/>
Submitted on: {{ link.date_submitted|date:"M d, Y" }}
</p>
{% endblock %}

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{% extends "base.html" %}
{% block title %}URL submission failed{% endblock %}
{% block content %}
<h2>URL submission failed</h2>
{% endblock %}
{% block extra_body %}
<script>
$(document).ready(
function() {
$("#id_u").focus().select();
});
</script>
{% endblock %}

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{% extends "base.html" %}
{% block title %}URL shortened{% endblock %}
{% block content %}
The following URL:<br/>
<pre>
{{ link.url }}
</pre>
<br/>
Was shortened to:<br/>
<input id="link" type="text" size="30"
value="{{ link.short_url }}"/>
<br/>
<br/>
Score: {{ link.usage_count }}
(<a href="{% url shortener.views.info link.to_base62 %}">Info</a>)
<br/>
<br/>
{% endblock %}
{% block extra_body %}
<script>
$(document).ready(
function() {
$("#link").focus().select();
});
</script>
{% endblock %}

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from django.conf.urls.defaults import *
from django.contrib import admin
from django.conf import settings
admin.autodiscover()
urlpatterns = patterns(
'',
(r'^$', 'shortener.views.index'),
(r'^admin/(.*)', admin.site.root),
(r'^submit/$', 'shortener.views.submit'),
(r'^(?P<base62_id>\w+)$', 'shortener.views.follow'),
(r'^info/(?P<base62_id>\w+)$', 'shortener.views.info'),
(r'^static/(?P<path>.*)$', 'django.views.static.serve',
{'document_root': settings.STATIC_DOC_ROOT}),
)