Category archives: Snaking

So you've embedded Django in your product lines and you want to provide a save/restore function.  You, of course, are using South migrations, and since you're agile, you often wind up with schema modifications as requirements change.  Since you're managing a lot of products, you want whatever solution you use to be at least somewhat ...

The first talk at Django Toronto was on Wave's single artefact deployment mechanism.  Basically it's the Fussy Firmware Packager, but without the signatures.  We use Fussy to be able to send/provide customers with (signed) images that can be loaded on (potentially disconnected) machines (through their web interfaces).

The images include a built virtualenv including ...

My talk at Django Toronto was scuttled by my computer refusing to recognize the HDMI (complained about a checksum failure when the HDMI was plugged in) and the further failure of the VirtualBox image to get onto the network so I could use another machine.  We spent all of the prep time trying to get ...

You want to use Django auth failures to generate fail2ban bans to protect against brute-forcing of your passwords. Nothing on django packages... So, you: wrap your login handler with a decorator that logs out messages on failures...

def log_login_failures( function ):
    auth_log = logging.getLogger( 'django.auth' )
    @wraps(function)
    def wrapped( request, *args, **named ):
        result = ...

Realized this morning that I offered to do a quick talk on how to get video running on your web-site at the Django Toronto tomorrow.  So I've put together a small demonstration that shows creating HLS and RTMP streams (using nginx-rtmp), and a quick demo showing how to push to the server using a video-for-linux ...

Nginx Upload Module's key feature/optimization is that as nginx streams the multipart post to disk, it directs the embedded files directly to separate file handles, you can then just move those files to the final location.  So far everything I've seen to replace it has at least a couple of copies going on, as they ...

So this came up (again). Users want to be able to look at a (largish) set of records in Django (millions of records) and do the following:

• click columns to sort by field values (with indication of sort direction, of course)
• filter by column values (include, exclude, greater-equal, less-equal); that is, they want to click ...

Finally integrated webassets (django_assets) into our build process. Very nice interface (using the template-only approach). And other than a few issues with our pyc-only deployments, it pretty much "just worked" once I realized that adding the staticfile-finder for the development server is a critical requirement.

The changes to your settings look like this:

# use ...

If you are using nginx as your front-end server for Django, you can also use it as a proxy cache (for smaller websites). You configure the cache like so:

proxy_cache_key "$scheme://$host$request_uri";
proxy_cache_path  /var/blog/cache  levels=1:2  keys_zone=blogcache:120m;
proxy_temp_path   /var/blog/proxy;
proxy_cache_valid 200 302  5m;
proxy_cache_valid 404      1m;
proxy_cache_use_stale updating;
proxy_cache_bypass $cookie_sessionid;
proxy_no_cache $cookie_sessionid;

The proxy_no_cache and proxy_cache_bypass lines ...

The Django Toronto meetup this month is on the 13th, and the deadline for PyCon.ca presentation proposals is the 21st.