apps/archive/utils.py

   1 from hashlib import sha1
   2 import os
   3 import os.path
   4 from django.core.files.storage import FileSystemStorage
   5 from django.core.files.uploadedfile import UploadedFile
   6
   7
   8 class ExistingFile(UploadedFile):
   9
  10     def __init__(self, path, *args, **kwargs):
  11         self.path = path
  12         return super(ExistingFile, self).__init__(*args, **kwargs)
  13
  14     def temporary_file_path(self):
  15         return self.path
  16
  17     def close(self):
  18         pass
  19
  20
  21 class OverwriteStorage(FileSystemStorage):
  22
  23     def _save(self, name, content):
  24         if self.exists(name):
  25             self.delete(name)
  26         return super(OverwriteStorage, self)._save(name, content)
  27
  28     def get_available_name(self, name):
  29         return name
  30
  31
  32 def sha1_file(f):
  33     sha = sha1()
  34     for piece in iter(lambda: f.read(1024*1024), ''):
  35         sha.update(piece)
  36     return sha.hexdigest()
  37
  38
  39 def all_files(root_path):
  40     root_len = len(root_path)
  41     for path, dirs, files in os.walk(root_path):
  42         for fname in files:
  43             yield os.path.join(path, fname)[root_len:].lstrip('/')
  44