人生在世,看得透又看得远者prevail everywhere. v.gd/YLHADG v.gd/cRqvfD v.gd/bKvfFH v.gd/DHdne v.gd/sRm3tA: 一个基于django的网站源码：Django-aggregator

Thursday, 20 March 2014

一个基于django的网站源码：Django-aggregator

A planet app for your Django project. It crawls a set of feeds, aggregates them on a single page and re-publishes the entries with RSS and Atom feeds.
This app is based on Django's community aggregator, updated to Django 1.2 and slightly improved.

Installation

pip install -e git+git://github.com/brutasse/django-aggregator#egg=aggregator

Requirements:

Django >= 1.2
The universal feedparser

Configuration

Add aggregator to your INSTALLED_APPS & run syncdb.

Templates

Create a simple view that renders a template. Use the following template tags to fetch & render the data:

{% load aggregator_tags %} to load the template library
{% get_feed_list as feed_list %} to fetch the feeds
{% get_entries <num_latest> as entries_list %} to fetch the latest entries

And then, to display the list of indexed feeds:

<h2>Indexed feeds</h2>
<ul>
    {% for feed in feed_list %}
        <li>{{ feed.title }} (<a href="{{ feed.public_url }}">site</a>)</li>
    {% endfor %}
</ul>

To render the latest entries:

<h2>Latest entries</h2>
{% for entry in entries_list %}
    <div class="entry">
        <h2>{{ entry.feed.title }}: {{ entry.title|safe }}</h2>
        <p>{{ entry.summary|safe }}</p>
        <p>
            Published: {{ entry.date|date }}.
            <a href="{{ entry.link }}">Read more</a>
        </p>
    </div>
{% endfor %}

If you want to render only a preview of the entries, you can do:

{{ entry.summary|safe|truncatewords_html:30 }}

Feeds

To publish some feeds of the aggregated content, subclass the base Feed class:

from aggregator.feeds import Feed

class MyAwesomeFeed(Feed):
    title = 'Aggregated content on <topic>'
    link = 'http://example.com'
    description = 'A more detailed description'

You can have Atom feeds:

from django.utils.feedgenerator import Atom1Feed

class MyAwesomeAtomFeed(MyAwesomeFeed):
    feed_type = Atom1Feed
    subtitle = MyAwesomeFeed.description

And add them to your URLs:

from myproject.feeds import MyAwesomeFeed, MyAwesomeAtomFeed

urlpatterns = patterns('',
    # ...
    url(r'^path/to/feeds/rss/$', MyAwesomeFeed(), name='aggregator_rss'),
    url(r'^path/to/feeds/atom/$', MyAwesomeAtomFeed(), name='aggregator_atom'),
    # ...
)

When you're done you can add your feeds' URLs in the <head> section of your website.

Usage

Adding some feeds

Go to the admin and add the different feeds' name, title & URLs.

Updating the feeds

There are two management commands:

mark_defunct_feeds will fetch all the registered feeds and check if they return a 404 or 500 response. If so, they are marked as "defunct" and will be skipped at each update.
update_feeds fetches all the non-defunct feeds and checks for new content.

Here is how you could configure cron to schedule these two tasks:

PYTHONPATH=/path/to/project
DJANGO_SETTINGS_MODULE=settings_module

15,45 * * * * python /path/to/manage.py update_feeds
0 */6 * * *   python /path/to/manage.py mark_defunct_feeds

from https://github.com/brutasse/django-aggregator

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