While high-level templating systems can be used with Twisted (for example, DivmodNevow , sometimes one needs a less file-heavy system which lets one directly write HTML. While ResourceScript is available, it has a high coding overhead, and requires some boring string arithmetic. ResourceTemplate fills the space between Nevow and ResourceScript using Quixote’s PTL (Python Templating Language).
ResourceTemplates need Quixote
installed. In Debian , that means
installing the python-quixote package
(apt-get install python-quixote ). Other operating systems
require other ways to install Quixote, or it can be done manually.
The easiest way to get Twisted Web to support ResourceTemplates is to
bind them to some extension using the web tap’s --processor
flag. Here is an example:
% twistd web --path=/var/www \
--processor=.rtl=twisted.web.script.ResourceTemplate
The above command line binds the rtl extension to use the
ResourceTemplate processor. Other ways are possible, but would require
more Python coding and are outside the scope of this HOWTO.
ResourceTemplates are coded in an extension of Python called the”Python Templating Language” . Complete documentation of the PTL
is available
at the quixote web site . The web server will expect the PTL source file
to define a variable named resource . This should be
a twisted.web.resource.Resource ,
whose .render method be called. Usually, you would want
to define render using the keyword template
rather than def .
Here is a simple example for a resource template.
from twisted.web.resource import Resource
def getQuote():
return "An apple a day keeps the doctor away."
class QuoteResource(Resource):
template render(self, request):
"""\
<html>
<head><title>Quotes Galore</title></head>
<body><h1>Quotes</h1>"""
getQuote()
"</body></html>"
resource = QuoteResource()