Use Jinja2 template engine in webpy

Problem

How to use Jinja2 (http://jinja.pocoo.org/2/) template engine in webpy?

Solution 1

You need to install both Jinja2 and webpy(0.3) first, and then try out the following code snippet:

import web
from web.contrib.template import render_jinja

urls = (
    '/(.*)', 'hello'
)

app = web.application(urls, globals())

render = render_jinja(
    'templates',            # Set template directory.
    encoding = 'utf-8',     # Encoding.
)

# Add/override some global functions.
#render._lookup.globals.update(
#       var=newvar,
#       var2=newvar2,
#)

class hello:
    def GET(self, name):
        return render.hello(name=name)

if __name__ == "__main__":
    app.run()

Template file: templates/hello.html

Hello, .

Solution 2

With this solution, you have to specify template name, it’s useful if template files are organized in different directories.

import os
import web
from jinja2 import Environment,FileSystemLoader

urls = ("/.*", "hello")
app = web.application(urls, globals())

def render_template(template_name, **context):
    extensions = context.pop('extensions', [])
    globals = context.pop('globals', {})

    jinja_env = Environment(
        loader=FileSystemLoader(os.path.join(os.path.dirname(__file__), 'templates')),
        extensions=extensions,
    )
    jinja_env.globals.update(globals)

    #jinja_env.update_template_context(context)
    return jinja_env.get_template(template_name).render(context)

class hello:
    def GET(self):
        # You can use a relative path as template name, for example, 'ldap/hello.html'.
        return render_template('hello.html', name='world')

if __name__ == "__main__":
    app.run()