app/django/template/loaders/filesystem.py
author Sverre Rabbelier <srabbelier@gmail.com>
Sun, 04 Oct 2009 23:43:36 +0200
changeset 3012 51eeb0c4317e
parent 323 ff1a9aa48cfd
permissions -rw-r--r--
Set new Melange version number to 0-5-20091004 in app.yaml.template.
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"""
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Wrapper for loading templates from the filesystem.
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"""
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from django.conf import settings
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from django.template import TemplateDoesNotExist
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from django.utils._os import safe_join
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def get_template_sources(template_name, template_dirs=None):
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    """
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    Returns the absolute paths to "template_name", when appended to each
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    directory in "template_dirs". Any paths that don't lie inside one of the
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    template dirs are excluded from the result set, for security reasons.
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    """
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    if not template_dirs:
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        template_dirs = settings.TEMPLATE_DIRS
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    for template_dir in template_dirs:
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        try:
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            yield safe_join(template_dir, template_name)
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        except UnicodeDecodeError:
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            # The template dir name was a bytestring that wasn't valid UTF-8.
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            raise
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        except ValueError:
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            # The joined path was located outside of this particular
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            # template_dir (it might be inside another one, so this isn't
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            # fatal).
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            pass
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def load_template_source(template_name, template_dirs=None):
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    tried = []
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    for filepath in get_template_sources(template_name, template_dirs):
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        try:
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            return (open(filepath).read().decode(settings.FILE_CHARSET), filepath)
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        except IOError:
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            tried.append(filepath)
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    if tried:
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        error_msg = "Tried %s" % tried
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    else:
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        error_msg = "Your TEMPLATE_DIRS setting is empty. Change it to point to at least one template directory."
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    raise TemplateDoesNotExist, error_msg
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load_template_source.is_usable = True