collective.diazo.readheaders-0.1-1.lbn19.noarch

This package extends the standard theming middleware of Diazo to add the ability to read the location of a rules XML file from the WSGI environment. This means, amongst being able to read a rules location from the environment for the local user, that an upstream service (such as a web server, reverse proxy, caching proxy, etc) is able to control the theme the middleware is using – and change this for any given request. This contrasts with the configuration-based approach taken by Diazo’s standard middleware, which requires a fixed path to be specified for the middleware.

So, this means with the right WSGI configuration, you could conceivably have one Diazo instance serving any number of themes without needing to explicitly configure paths, urlmaps or the like. If you combine this with a suitable front-facing tool (such as a configurable web server like Apache, Nginx, Cherokee, or any other), then you can have this one Diazo instance theming any number of applications, and theming differently based upon any condition your web server supports – such as incoming host name, HTTP vs HTTPS, specific URLs or regex, headers, IP addresses, and more. To achieve this, all you need to do is set the right HTTP header – which is the path to your rules file – and ensure this is sent to your middleware based upon your various conditions.