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- """
- Wrapper for loading templates from the filesystem.
- """
- from django.conf import settings
- from django.template.base import TemplateDoesNotExist
- from django.template.loader import BaseLoader
- from django.utils._os import safe_join
- class Loader(BaseLoader):
- is_usable = True
- def get_template_sources(self, template_name, template_dirs=None):
- """
- Returns the absolute paths to "template_name", when appended to each
- directory in "template_dirs". Any paths that don't lie inside one of the
- template dirs are excluded from the result set, for security reasons.
- """
- if not template_dirs:
- template_dirs = settings.TEMPLATE_DIRS
- for template_dir in template_dirs:
- try:
- yield safe_join(template_dir, template_name)
- except UnicodeDecodeError:
- # The template dir name was a bytestring that wasn't valid UTF-8.
- raise
- except ValueError:
- # The joined path was located outside of this particular
- # template_dir (it might be inside another one, so this isn't
- # fatal).
- pass
- def load_template_source(self, template_name, template_dirs=None):
- tried = []
- for filepath in self.get_template_sources(template_name, template_dirs):
- try:
- with open(filepath, 'rb') as fp:
- return (fp.read().decode(settings.FILE_CHARSET), filepath)
- except IOError:
- tried.append(filepath)
- if tried:
- error_msg = "Tried %s" % tried
- else:
- error_msg = "Your TEMPLATE_DIRS setting is empty. Change it to point to at least one template directory."
- raise TemplateDoesNotExist(error_msg)
- load_template_source.is_usable = True
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