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djangojinja2.py
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Editing: djangojinja2.py
# -*- coding: utf-8 -*- """ djangojinja2 ~~~~~~~~~~~~ Adds support for Jinja2 to Django. Configuration variables: ======================= ============================================= Key Description ======================= ============================================= `JINJA2_TEMPLATE_DIRS` List of template folders `JINJA2_EXTENSIONS` List of Jinja2 extensions to use `JINJA2_CACHE_SIZE` The size of the Jinja2 template cache. ======================= ============================================= :copyright: (c) 2009 by the Jinja Team. :license: BSD. """ from itertools import chain from django.conf import settings from django.http import HttpResponse from django.core.exceptions import ImproperlyConfigured from django.template.context import get_standard_processors from django.template import TemplateDoesNotExist from jinja2 import Environment, FileSystemLoader, TemplateNotFound from jinja2.defaults import DEFAULT_NAMESPACE # the environment is unconfigured until the first template is loaded. _jinja_env = None def get_env(): """Get the Jinja2 env and initialize it if necessary.""" global _jinja_env if _jinja_env is None: _jinja_env = create_env() return _jinja_env def create_env(): """Create a new Jinja2 environment.""" searchpath = list(settings.JINJA2_TEMPLATE_DIRS) return Environment(loader=FileSystemLoader(searchpath), auto_reload=settings.TEMPLATE_DEBUG, cache_size=getattr(settings, 'JINJA2_CACHE_SIZE', 50), extensions=getattr(settings, 'JINJA2_EXTENSIONS', ())) def get_template(template_name, globals=None): """Load a template.""" try: return get_env().get_template(template_name, globals=globals) except TemplateNotFound, e: raise TemplateDoesNotExist(str(e)) def select_template(templates, globals=None): """Try to load one of the given templates.""" env = get_env() for template in templates: try: return env.get_template(template, globals=globals) except TemplateNotFound: continue raise TemplateDoesNotExist(', '.join(templates)) def render_to_string(template_name, context=None, request=None, processors=None): """Render a template into a string.""" context = dict(context or {}) if request is not None: context['request'] = request for processor in chain(get_standard_processors(), processors or ()): context.update(processor(request)) return get_template(template_name).render(context) def render_to_response(template_name, context=None, request=None, processors=None, mimetype=None): """Render a template into a response object.""" return HttpResponse(render_to_string(template_name, context, request, processors), mimetype=mimetype)
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