def safe_join(base, *paths):
"""
A version of django.utils._os.safe_join for S3 paths.
Joins one or more path components to the base path component
intelligently. Returns a normalized version of the final path.
The final path must be located inside of the base path component
(otherwise a ValueError is raised).
Paths outside the base path indicate a possible security
sensitive operation.
"""
from urlparse import urljoin
base_path = force_unicode(base)
base_path = base_path.rstrip('/')
paths = [force_unicode(p) for p in paths]
final_path = base_path
for path in paths:
final_path = urljoin(final_path.rstrip('/') + "/", path.rstrip("/"))
# Ensure final_path starts with base_path and that the next character after
# the final path is '/' (or nothing, in which case final_path must be
# equal to base_path).
base_path_len = len(base_path)
if (not final_path.startswith(base_path) or
final_path[base_path_len:base_path_len + 1] not in ('', '/')):
raise ValueError('the joined path is located outside of the base path'
' component')
return final_path.lstrip('/')
def _save(self, name, content):
name = force_unicode(name).replace('\\', '/')
content.open()
file = self.fs.new_file(filename=name)
if hasattr(content, 'chunks'):
for chunk in content.chunks():
file.write(chunk)
else:
file.write(content)
file.close()
content.close()
return name
def _decode_name(self, name):
return force_unicode(name, encoding=self.file_name_charset)
def get_valid_name(self, name):
return force_unicode(name).strip().replace('\\', '/')
