django/tests/file_storage/tests.py

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# -*- coding: utf-8 -*-
from __future__ import unicode_literals
import errno
import os
import shutil
import sys
import tempfile
import time
import unittest
from datetime import datetime, timedelta
try:
import threading
except ImportError:
import dummy_threading as threading
from django.conf import settings
from django.core.cache import cache
from django.core.exceptions import SuspiciousOperation, ImproperlyConfigured
from django.core.files.base import File, ContentFile
from django.core.files.storage import FileSystemStorage, get_storage_class
from django.core.files.uploadedfile import SimpleUploadedFile
from django.test import LiveServerTestCase, SimpleTestCase
from django.test.utils import override_settings
from django.utils import six
from django.utils.six.moves.urllib.request import urlopen
from django.utils._os import upath
from .models import Storage, temp_storage, temp_storage_location
class GetStorageClassTests(SimpleTestCase):
def test_get_filesystem_storage(self):
"""
get_storage_class returns the class for a storage backend name/path.
"""
self.assertEqual(
get_storage_class('django.core.files.storage.FileSystemStorage'),
FileSystemStorage)
def test_get_invalid_storage_module(self):
"""
get_storage_class raises an error if the requested import don't exist.
"""
with six.assertRaisesRegex(self, ImproperlyConfigured,
"Error importing module storage: \"No module named '?storage'?\""):
get_storage_class('storage.NonExistingStorage')
def test_get_nonexisting_storage_class(self):
"""
get_storage_class raises an error if the requested class don't exist.
"""
self.assertRaisesMessage(
ImproperlyConfigured,
'Module "django.core.files.storage" does not define a '
'"NonExistingStorage" attribute/class',
get_storage_class,
'django.core.files.storage.NonExistingStorage')
def test_get_nonexisting_storage_module(self):
"""
get_storage_class raises an error if the requested module don't exist.
"""
# Error message may or may not be the fully qualified path.
with six.assertRaisesRegex(self, ImproperlyConfigured,
"Error importing module django.core.files.non_existing_storage: "
"\"No module named '?(django.core.files.)?non_existing_storage'?\""):
get_storage_class(
'django.core.files.non_existing_storage.NonExistingStorage')
class FileStorageTests(unittest.TestCase):
storage_class = FileSystemStorage
def setUp(self):
self.temp_dir = tempfile.mkdtemp()
self.storage = self.storage_class(location=self.temp_dir,
base_url='/test_media_url/')
# Set up a second temporary directory which is ensured to have a mixed
# case name.
self.temp_dir2 = tempfile.mkdtemp(suffix='aBc')
def tearDown(self):
shutil.rmtree(self.temp_dir)
shutil.rmtree(self.temp_dir2)
def test_emtpy_location(self):
"""
Makes sure an exception is raised if the location is empty
"""
storage = self.storage_class(location='')
self.assertEqual(storage.base_location, '')
self.assertEqual(storage.location, upath(os.getcwd()))
def test_file_access_options(self):
"""
Standard file access options are available, and work as expected.
"""
self.assertFalse(self.storage.exists('storage_test'))
f = self.storage.open('storage_test', 'w')
f.write('storage contents')
f.close()
self.assertTrue(self.storage.exists('storage_test'))
f = self.storage.open('storage_test', 'r')
self.assertEqual(f.read(), 'storage contents')
f.close()
self.storage.delete('storage_test')
self.assertFalse(self.storage.exists('storage_test'))
def test_file_accessed_time(self):
"""
File storage returns a Datetime object for the last accessed time of
a file.
"""
self.assertFalse(self.storage.exists('test.file'))
f = ContentFile('custom contents')
f_name = self.storage.save('test.file', f)
atime = self.storage.accessed_time(f_name)
self.assertEqual(atime, datetime.fromtimestamp(
os.path.getatime(self.storage.path(f_name))))
self.assertTrue(datetime.now() - self.storage.accessed_time(f_name) < timedelta(seconds=2))
self.storage.delete(f_name)
def test_file_created_time(self):
"""
File storage returns a Datetime object for the creation time of
a file.
"""
self.assertFalse(self.storage.exists('test.file'))
f = ContentFile('custom contents')
f_name = self.storage.save('test.file', f)
ctime = self.storage.created_time(f_name)
self.assertEqual(ctime, datetime.fromtimestamp(
os.path.getctime(self.storage.path(f_name))))
self.assertTrue(datetime.now() - self.storage.created_time(f_name) < timedelta(seconds=2))
self.storage.delete(f_name)
def test_file_modified_time(self):
"""
File storage returns a Datetime object for the last modified time of
a file.
"""
self.assertFalse(self.storage.exists('test.file'))
f = ContentFile('custom contents')
f_name = self.storage.save('test.file', f)
mtime = self.storage.modified_time(f_name)
self.assertEqual(mtime, datetime.fromtimestamp(
os.path.getmtime(self.storage.path(f_name))))
self.assertTrue(datetime.now() - self.storage.modified_time(f_name) < timedelta(seconds=2))
self.storage.delete(f_name)
def test_file_save_without_name(self):
"""
File storage extracts the filename from the content object if no
name is given explicitly.
"""
self.assertFalse(self.storage.exists('test.file'))
f = ContentFile('custom contents')
f.name = 'test.file'
storage_f_name = self.storage.save(None, f)
self.assertEqual(storage_f_name, f.name)
self.assertTrue(os.path.exists(os.path.join(self.temp_dir, f.name)))
self.storage.delete(storage_f_name)
def test_file_save_with_path(self):
"""
Saving a pathname should create intermediate directories as necessary.
"""
self.assertFalse(self.storage.exists('path/to'))
self.storage.save('path/to/test.file',
ContentFile('file saved with path'))
self.assertTrue(self.storage.exists('path/to'))
with self.storage.open('path/to/test.file') as f:
self.assertEqual(f.read(), b'file saved with path')
self.assertTrue(os.path.exists(
os.path.join(self.temp_dir, 'path', 'to', 'test.file')))
self.storage.delete('path/to/test.file')
def test_file_path(self):
"""
File storage returns the full path of a file
"""
self.assertFalse(self.storage.exists('test.file'))
f = ContentFile('custom contents')
f_name = self.storage.save('test.file', f)
self.assertEqual(self.storage.path(f_name),
os.path.join(self.temp_dir, f_name))
self.storage.delete(f_name)
def test_file_url(self):
"""
File storage returns a url to access a given file from the Web.
"""
self.assertEqual(self.storage.url('test.file'),
'%s%s' % (self.storage.base_url, 'test.file'))
# should encode special chars except ~!*()'
# like encodeURIComponent() JavaScript function do
self.assertEqual(self.storage.url(r"""~!*()'@#$%^&*abc`+ =.file"""),
"""/test_media_url/~!*()'%40%23%24%25%5E%26*abc%60%2B%20%3D.file""")
# should stanslate os path separator(s) to the url path separator
self.assertEqual(self.storage.url("""a/b\\c.file"""),
"""/test_media_url/a/b/c.file""")
self.storage.base_url = None
self.assertRaises(ValueError, self.storage.url, 'test.file')
def test_listdir(self):
"""
File storage returns a tuple containing directories and files.
"""
self.assertFalse(self.storage.exists('storage_test_1'))
self.assertFalse(self.storage.exists('storage_test_2'))
self.assertFalse(self.storage.exists('storage_dir_1'))
self.storage.save('storage_test_1', ContentFile('custom content'))
self.storage.save('storage_test_2', ContentFile('custom content'))
os.mkdir(os.path.join(self.temp_dir, 'storage_dir_1'))
dirs, files = self.storage.listdir('')
self.assertEqual(set(dirs), set(['storage_dir_1']))
self.assertEqual(set(files),
set(['storage_test_1', 'storage_test_2']))
self.storage.delete('storage_test_1')
self.storage.delete('storage_test_2')
os.rmdir(os.path.join(self.temp_dir, 'storage_dir_1'))
def test_file_storage_prevents_directory_traversal(self):
"""
File storage prevents directory traversal (files can only be accessed if
they're below the storage location).
"""
self.assertRaises(SuspiciousOperation, self.storage.exists, '..')
self.assertRaises(SuspiciousOperation, self.storage.exists, '/etc/passwd')
def test_file_storage_preserves_filename_case(self):
"""The storage backend should preserve case of filenames."""
# Create a storage backend associated with the mixed case name
# directory.
temp_storage = self.storage_class(location=self.temp_dir2)
# Ask that storage backend to store a file with a mixed case filename.
mixed_case = 'CaSe_SeNsItIvE'
file = temp_storage.open(mixed_case, 'w')
file.write('storage contents')
file.close()
self.assertEqual(os.path.join(self.temp_dir2, mixed_case),
temp_storage.path(mixed_case))
temp_storage.delete(mixed_case)
def test_makedirs_race_handling(self):
"""
File storage should be robust against directory creation race conditions.
"""
real_makedirs = os.makedirs
# Monkey-patch os.makedirs, to simulate a normal call, a raced call,
# and an error.
def fake_makedirs(path):
if path == os.path.join(self.temp_dir, 'normal'):
real_makedirs(path)
elif path == os.path.join(self.temp_dir, 'raced'):
real_makedirs(path)
raise OSError(errno.EEXIST, 'simulated EEXIST')
elif path == os.path.join(self.temp_dir, 'error'):
raise OSError(errno.EACCES, 'simulated EACCES')
else:
self.fail('unexpected argument %r' % path)
try:
os.makedirs = fake_makedirs
self.storage.save('normal/test.file',
ContentFile('saved normally'))
with self.storage.open('normal/test.file') as f:
self.assertEqual(f.read(), b'saved normally')
self.storage.save('raced/test.file',
ContentFile('saved with race'))
with self.storage.open('raced/test.file') as f:
self.assertEqual(f.read(), b'saved with race')
# Check that OSErrors aside from EEXIST are still raised.
self.assertRaises(OSError,
self.storage.save, 'error/test.file', ContentFile('not saved'))
finally:
os.makedirs = real_makedirs
def test_remove_race_handling(self):
"""
File storage should be robust against file removal race conditions.
"""
real_remove = os.remove
# Monkey-patch os.remove, to simulate a normal call, a raced call,
# and an error.
def fake_remove(path):
if path == os.path.join(self.temp_dir, 'normal.file'):
real_remove(path)
elif path == os.path.join(self.temp_dir, 'raced.file'):
real_remove(path)
raise OSError(errno.ENOENT, 'simulated ENOENT')
elif path == os.path.join(self.temp_dir, 'error.file'):
raise OSError(errno.EACCES, 'simulated EACCES')
else:
self.fail('unexpected argument %r' % path)
try:
os.remove = fake_remove
self.storage.save('normal.file', ContentFile('delete normally'))
self.storage.delete('normal.file')
self.assertFalse(self.storage.exists('normal.file'))
self.storage.save('raced.file', ContentFile('delete with race'))
self.storage.delete('raced.file')
self.assertFalse(self.storage.exists('normal.file'))
# Check that OSErrors aside from ENOENT are still raised.
self.storage.save('error.file', ContentFile('delete with error'))
self.assertRaises(OSError, self.storage.delete, 'error.file')
finally:
os.remove = real_remove
def test_file_chunks_error(self):
"""
Test behaviour when file.chunks() is raising an error
"""
f1 = ContentFile('chunks fails')
def failing_chunks():
raise IOError
f1.chunks = failing_chunks
with self.assertRaises(IOError):
self.storage.save('error.file', f1)
def test_delete_no_name(self):
"""
Calling delete with an empty name should not try to remove the base
storage directory, but fail loudly (#20660).
"""
with self.assertRaises(AssertionError):
self.storage.delete('')
class CustomStorage(FileSystemStorage):
def get_available_name(self, name):
"""
Append numbers to duplicate files rather than underscores, like Trac.
"""
parts = name.split('.')
basename, ext = parts[0], parts[1:]
number = 2
while self.exists(name):
name = '.'.join([basename, str(number)] + ext)
number += 1
return name
class CustomStorageTests(FileStorageTests):
storage_class = CustomStorage
def test_custom_get_available_name(self):
first = self.storage.save('custom_storage', ContentFile('custom contents'))
self.assertEqual(first, 'custom_storage')
second = self.storage.save('custom_storage', ContentFile('more contents'))
self.assertEqual(second, 'custom_storage.2')
self.storage.delete(first)
self.storage.delete(second)
class FileFieldStorageTests(unittest.TestCase):
def tearDown(self):
shutil.rmtree(temp_storage_location)
def test_files(self):
# Attempting to access a FileField from the class raises a descriptive
# error
self.assertRaises(AttributeError, lambda: Storage.normal)
# An object without a file has limited functionality.
obj1 = Storage()
self.assertEqual(obj1.normal.name, "")
self.assertRaises(ValueError, lambda: obj1.normal.size)
# Saving a file enables full functionality.
obj1.normal.save("django_test.txt", ContentFile("content"))
self.assertEqual(obj1.normal.name, "tests/django_test.txt")
self.assertEqual(obj1.normal.size, 7)
self.assertEqual(obj1.normal.read(), b"content")
obj1.normal.close()
# File objects can be assigned to FileField attributes, but shouldn't
# get committed until the model it's attached to is saved.
obj1.normal = SimpleUploadedFile("assignment.txt", b"content")
dirs, files = temp_storage.listdir("tests")
self.assertEqual(dirs, [])
self.assertFalse("assignment.txt" in files)
obj1.save()
dirs, files = temp_storage.listdir("tests")
self.assertEqual(sorted(files), ["assignment.txt", "django_test.txt"])
# Save another file with the same name.
obj2 = Storage()
obj2.normal.save("django_test.txt", ContentFile("more content"))
self.assertEqual(obj2.normal.name, "tests/django_test_1.txt")
self.assertEqual(obj2.normal.size, 12)
obj2.normal.close()
# Deleting an object does not delete the file it uses.
obj2.delete()
obj2.normal.save("django_test.txt", ContentFile("more content"))
self.assertEqual(obj2.normal.name, "tests/django_test_2.txt")
obj2.normal.close()
def test_filefield_read(self):
# Files can be read in a little at a time, if necessary.
obj = Storage.objects.create(
normal=SimpleUploadedFile("assignment.txt", b"content"))
obj.normal.open()
self.assertEqual(obj.normal.read(3), b"con")
self.assertEqual(obj.normal.read(), b"tent")
self.assertEqual(list(obj.normal.chunks(chunk_size=2)), [b"co", b"nt", b"en", b"t"])
obj.normal.close()
def test_file_numbering(self):
# Multiple files with the same name get _N appended to them.
objs = [Storage() for i in range(3)]
for o in objs:
o.normal.save("multiple_files.txt", ContentFile("Same Content"))
self.assertEqual(
[o.normal.name for o in objs],
["tests/multiple_files.txt", "tests/multiple_files_1.txt", "tests/multiple_files_2.txt"]
)
for o in objs:
o.delete()
def test_filefield_default(self):
# Default values allow an object to access a single file.
temp_storage.save('tests/default.txt', ContentFile('default content'))
obj = Storage.objects.create()
self.assertEqual(obj.default.name, "tests/default.txt")
self.assertEqual(obj.default.read(), b"default content")
obj.default.close()
# But it shouldn't be deleted, even if there are no more objects using
# it.
obj.delete()
obj = Storage()
self.assertEqual(obj.default.read(), b"default content")
obj.default.close()
def test_empty_upload_to(self):
# upload_to can be empty, meaning it does not use subdirectory.
obj = Storage()
obj.empty.save('django_test.txt', ContentFile('more content'))
self.assertEqual(obj.empty.name, "./django_test.txt")
self.assertEqual(obj.empty.read(), b"more content")
obj.empty.close()
def test_random_upload_to(self):
# Verify the fix for #5655, making sure the directory is only
# determined once.
obj = Storage()
obj.random.save("random_file", ContentFile("random content"))
self.assertTrue(obj.random.name.endswith("/random_file"))
obj.random.close()
def test_filefield_pickling(self):
# Push an object into the cache to make sure it pickles properly
obj = Storage()
obj.normal.save("django_test.txt", ContentFile("more content"))
obj.normal.close()
cache.set("obj", obj)
self.assertEqual(cache.get("obj").normal.name, "tests/django_test.txt")
def test_file_object(self):
# Create sample file
temp_storage.save('tests/example.txt', ContentFile('some content'))
# Load it as python file object
with open(temp_storage.path('tests/example.txt')) as file_obj:
# Save it using storage and read its content
temp_storage.save('tests/file_obj', file_obj)
self.assertTrue(temp_storage.exists('tests/file_obj'))
with temp_storage.open('tests/file_obj') as f:
self.assertEqual(f.read(), b'some content')
def test_stringio(self):
# Test passing StringIO instance as content argument to save
output = six.StringIO()
output.write('content')
output.seek(0)
# Save it and read written file
temp_storage.save('tests/stringio', output)
self.assertTrue(temp_storage.exists('tests/stringio'))
with temp_storage.open('tests/stringio') as f:
self.assertEqual(f.read(), b'content')
# Tests for a race condition on file saving (#4948).
# This is written in such a way that it'll always pass on platforms
# without threading.
class SlowFile(ContentFile):
def chunks(self):
time.sleep(1)
return super(ContentFile, self).chunks()
class FileSaveRaceConditionTest(unittest.TestCase):
def setUp(self):
self.storage_dir = tempfile.mkdtemp()
self.storage = FileSystemStorage(self.storage_dir)
self.thread = threading.Thread(target=self.save_file, args=['conflict'])
def tearDown(self):
shutil.rmtree(self.storage_dir)
def save_file(self, name):
name = self.storage.save(name, SlowFile(b"Data"))
def test_race_condition(self):
self.thread.start()
self.save_file('conflict')
self.thread.join()
self.assertTrue(self.storage.exists('conflict'))
self.assertTrue(self.storage.exists('conflict_1'))
self.storage.delete('conflict')
self.storage.delete('conflict_1')
@unittest.skipIf(sys.platform.startswith('win'), "Windows only partially supports umasks and chmod.")
class FileStoragePermissions(unittest.TestCase):
def setUp(self):
self.umask = 0o027
self.old_umask = os.umask(self.umask)
self.storage_dir = tempfile.mkdtemp()
def tearDown(self):
shutil.rmtree(self.storage_dir)
os.umask(self.old_umask)
@override_settings(FILE_UPLOAD_PERMISSIONS=0o654)
def test_file_upload_permissions(self):
self.storage = FileSystemStorage(self.storage_dir)
name = self.storage.save("the_file", ContentFile("data"))
actual_mode = os.stat(self.storage.path(name))[0] & 0o777
self.assertEqual(actual_mode, 0o654)
@override_settings(FILE_UPLOAD_PERMISSIONS=None)
def test_file_upload_default_permissions(self):
self.storage = FileSystemStorage(self.storage_dir)
fname = self.storage.save("some_file", ContentFile("data"))
mode = os.stat(self.storage.path(fname))[0] & 0o777
self.assertEqual(mode, 0o666 & ~self.umask)
@override_settings(FILE_UPLOAD_DIRECTORY_PERMISSIONS=0o765)
def test_file_upload_directory_permissions(self):
self.storage = FileSystemStorage(self.storage_dir)
name = self.storage.save("the_directory/the_file", ContentFile("data"))
dir_mode = os.stat(os.path.dirname(self.storage.path(name)))[0] & 0o777
self.assertEqual(dir_mode, 0o765)
@override_settings(FILE_UPLOAD_DIRECTORY_PERMISSIONS=None)
def test_file_upload_directory_default_permissions(self):
self.storage = FileSystemStorage(self.storage_dir)
name = self.storage.save("the_directory/the_file", ContentFile("data"))
dir_mode = os.stat(os.path.dirname(self.storage.path(name)))[0] & 0o777
self.assertEqual(dir_mode, 0o777 & ~self.umask)
class FileStoragePathParsing(unittest.TestCase):
def setUp(self):
self.storage_dir = tempfile.mkdtemp()
self.storage = FileSystemStorage(self.storage_dir)
def tearDown(self):
shutil.rmtree(self.storage_dir)
def test_directory_with_dot(self):
"""Regression test for #9610.
If the directory name contains a dot and the file name doesn't, make
sure we still mangle the file name instead of the directory name.
"""
self.storage.save('dotted.path/test', ContentFile("1"))
self.storage.save('dotted.path/test', ContentFile("2"))
self.assertFalse(os.path.exists(os.path.join(self.storage_dir, 'dotted_.path')))
self.assertTrue(os.path.exists(os.path.join(self.storage_dir, 'dotted.path/test')))
self.assertTrue(os.path.exists(os.path.join(self.storage_dir, 'dotted.path/test_1')))
def test_first_character_dot(self):
"""
File names with a dot as their first character don't have an extension,
and the underscore should get added to the end.
"""
self.storage.save('dotted.path/.test', ContentFile("1"))
self.storage.save('dotted.path/.test', ContentFile("2"))
self.assertTrue(os.path.exists(os.path.join(self.storage_dir, 'dotted.path/.test')))
self.assertTrue(os.path.exists(os.path.join(self.storage_dir, 'dotted.path/.test_1')))
class ContentFileStorageTestCase(unittest.TestCase):
def setUp(self):
self.storage_dir = tempfile.mkdtemp()
self.storage = FileSystemStorage(self.storage_dir)
def tearDown(self):
shutil.rmtree(self.storage_dir)
def test_content_saving(self):
"""
Test that ContentFile can be saved correctly with the filesystem storage,
both if it was initialized with string or unicode content"""
self.storage.save('bytes.txt', ContentFile(b"content"))
self.storage.save('unicode.txt', ContentFile("español"))
class FileLikeObjectTestCase(LiveServerTestCase):
"""
Test file-like objects (#15644).
"""
available_apps = []
urls = 'file_storage.urls'
def setUp(self):
self.temp_dir = tempfile.mkdtemp()
self.storage = FileSystemStorage(location=self.temp_dir)
def tearDown(self):
shutil.rmtree(self.temp_dir)
def test_urllib2_urlopen(self):
"""
Test the File storage API with a file like object coming from urllib2.urlopen()
"""
file_like_object = urlopen(self.live_server_url + '/')
f = File(file_like_object)
stored_filename = self.storage.save("remote_file.html", f)
remote_file = urlopen(self.live_server_url + '/')
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with self.storage.open(stored_filename) as stored_file:
self.assertEqual(stored_file.read(), remote_file.read())