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<h1>Static content</h1>

<p>Some content on a website does not change and therefore should be served

up either directly through the web server or a content delivery network (CDN).

Examples include JavaScript, image, and CSS files.</p>

<h2>Types of static content</h2>

<p>Static content can be either assets created as part of your development

process such as images on your landing page or user-generated content. The

Django framework calls these two categories <em>assets</em> and <em>media</em>.</p>

<h2>Content delivery networks</h2>

<p>A content delivery network (CDN) is a third party that stores and serves

static files. <a href="http://aws.amazon.com/cloudfront/">Amazon CloudFront</a>,

<a href="http://www.akamai.com/">Akamai</a>, and

<a href="http://www.rackspace.com/cloud/public/files/">Rackspace Cloud Files</a>

are examples of CDNs. The purpose of a CDN is to remove the load of static

file requests from web servers that are handling dynamic web content. For

example, if you have an nginx server that handles both static files and

acts as a front for a Green Unicorn WSGI server on a 512 megabyte

virtual private server, the nginx server will run into resource

constraints under heavy traffic. A CDN can remove the need to serve static

assets from that nginx server so it can purely act as a pass through for

requests to the Green Unicorn WSGI server.</p>

<p>CDNs send content responses from data centers with the closest proximity to the requester.</p>

<h2>Static Content Resources</h2>

<ul>

<li>

<p><a href="http://blog.iambob.me/the-super-stupid-idiots-guide-to-getting-started-with-django-pipeline-and-s3/">The super stupid idiot's guide to getting started with Django, Pipeline, and S3</a>

shows how to host static content on S3 and use those files with Django.</p>

</li>

<li>

<p><a href="http://tech.marksblogg.com/crushing-caching-cdn-django.html">Crushing, caching and CDN deployment in Django</a>

shows how to use django-compressor and a CDN to scale static and media

file serving.</p>

</li>

<li>

<p><a href="http://blog.doismellburning.co.uk/2012/07/14/using-amazon-s3-to-host-your-django-static-files/">Using Amazon S3 to host your Django static files</a></p>

</li>

<li>

<p><a href="http://www.hanselman.com/blog/CDNsFailButYourScriptsDontHaveToFallbackFromCDNToLocalJQuery.aspx">CDNs fail, but your scripts don't have to</a></p>

</li>

<li>

<p><a href="http://django-storages.readthedocs.org/en/latest/">django-storages</a> is

a Django library for managing static and media files on services such as

Amazon S3 and other content delivery networks.</p>

</li>

<li>

<p>RevSys has a nice article on a range of

<a href="http://www.revsys.com/12days/front-end-performance/">important static file optimizations</a>

such as setting cache headers, optimizing JavaScript and reducing the

size of images.</p>

</li>

</ul>

<h2>Static content learning checklist</h2>

<p><i class="fa fa-check-square-o"></i>

Identify a content delivery network to offload serving static content files

from your local web server. I recommend using Amazon S3 with CloudFront as

it's easy to set up and will scale to high bandwidth demands.</p>

<p><i class="fa fa-check-square-o"></i>

Update your web application deployment process so updated static files are

uploaded to the CDN. </p>

<p><i class="fa fa-check-square-o"></i>

Move static content serving from the www subdomain to a static (or similarly

named) subdomain so browsers will load static content in parallel to www

HTTP requests.</p>

<h3>What's next for building your app?</h3>

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