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"""
Wrapper for loading templates from the filesystem.
"""
import errno
import io
import warnings
from django.core.exceptions import SuspiciousFileOperation
from django.template import Origin, TemplateDoesNotExist
from django.utils._os import safe_join
from django.utils.deprecation import RemovedInDjango20Warning
from .base import Loader as BaseLoader
class Loader(BaseLoader):
def __init__(self, engine, dirs=None):
super(Loader, self).__init__(engine)
self.dirs = dirs
def get_dirs(self):
return self.dirs if self.dirs is not None else self.engine.dirs
def get_contents(self, origin):
try:
with io.open(origin.name, encoding=self.engine.file_charset) as fp:
return fp.read()
except IOError as e:
if e.errno == errno.ENOENT:
raise TemplateDoesNotExist(origin)
raise
def get_template_sources(self, template_name, template_dirs=None):
"""
Return an Origin object pointing to an absolute path in each directory
in template_dirs. For security reasons, if a path doesn't lie inside
one of the template_dirs it is excluded from the result set.
"""
if not template_dirs:
template_dirs = self.get_dirs()
for template_dir in template_dirs:
try:
name = safe_join(template_dir, template_name)
except SuspiciousFileOperation:
# The joined path was located outside of this template_dir
# (it might be inside another one, so this isn't fatal).
continue
yield Origin(
name=name,
template_name=template_name,
loader=self,
)
def load_template_source(self, template_name, template_dirs=None):
warnings.warn(
'The load_template_sources() method is deprecated. Use '
'get_template() or get_contents() instead.',
RemovedInDjango20Warning,
)
for origin in self.get_template_sources(template_name, template_dirs):
try:
return self.get_contents(origin), origin.name
except TemplateDoesNotExist:
pass
raise TemplateDoesNotExist(template_name)
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