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python-Django
delegate-os-path-filename-generation-to-storage...
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File delegate-os-path-filename-generation-to-storage.patch of Package python-Django
commit c8ab1ee37ce5e486b9c59c7f8f03999457c67d86 Author: Cristiano <cristianocca@hotmail.com> Date: Sun Mar 20 22:51:17 2016 -0300 Fixed #26058 -- Delegated os.path bits of FileField's filename generation to the Storage. (cherry picked from commit 914c72be2abb1c6dd860cb9279beaa66409ae1b2) diff --git a/django/core/files/storage.py b/django/core/files/storage.py index 39cf5d800b85..df92f0af8a28 100644 --- a/django/core/files/storage.py +++ b/django/core/files/storage.py @@ -60,10 +60,7 @@ class Storage(object): ) name = self.get_available_name(name) - name = self._save(name, content) - - # Store filenames with forward slashes, even on Windows - return force_text(name.replace('\\', '/')) + return self._save(name, content) # These methods are part of the public API, with default implementations. @@ -105,6 +102,15 @@ class Storage(object): name = os.path.join(dir_name, "%s_%s%s" % (file_root, get_random_string(7), file_ext)) return name + def generate_filename(self, filename): + """ + Validate the filename by calling get_valid_name() and return a filename + to be passed to the save() method. + """ + # `filename` may include a path as returned by FileField.upload_to. + dirname, filename = os.path.split(filename) + return os.path.normpath(os.path.join(dirname, self.get_valid_name(filename))) + def path(self, name): """ Returns a local filesystem path where the file can be retrieved using @@ -274,7 +280,8 @@ class FileSystemStorage(Storage): if self.file_permissions_mode is not None: os.chmod(full_path, self.file_permissions_mode) - return name + # Store filenames with forward slashes, even on Windows. + return force_text(name.replace('\\', '/')) def delete(self, name): assert name, "The name argument is not allowed to be empty." diff --git a/django/db/models/fields/files.py b/django/db/models/fields/files.py index bf447591b07b..20374ba8e69a 100644 --- a/django/db/models/fields/files.py +++ b/django/db/models/fields/files.py @@ -1,5 +1,6 @@ import datetime import os +import posixpath import warnings from django import forms @@ -11,6 +12,7 @@ from django.db.models import signals from django.db.models.fields import Field from django.utils import six from django.utils.deprecation import RemovedInDjango110Warning +from django.utils.deprecation import RemovedInDjango20Warning from django.utils.encoding import force_str, force_text from django.utils.inspect import func_supports_parameter from django.utils.translation import ugettext_lazy as _ @@ -319,13 +321,34 @@ class FileField(Field): setattr(cls, self.name, self.descriptor_class(self)) def get_directory_name(self): + warnings.warn( + 'FileField now delegates file name and folder processing to the ' + 'storage. get_directory_name() will be removed in Django 2.0.', + RemovedInDjango20Warning, stacklevel=2 + ) return os.path.normpath(force_text(datetime.datetime.now().strftime(force_str(self.upload_to)))) def get_filename(self, filename): + warnings.warn( + 'FileField now delegates file name and folder processing to the ' + 'storage. get_filename() will be removed in Django 2.0.', + RemovedInDjango20Warning, stacklevel=2 + ) return os.path.normpath(self.storage.get_valid_name(os.path.basename(filename))) def generate_filename(self, instance, filename): - return os.path.join(self.get_directory_name(), self.get_filename(filename)) + """ + Apply (if callable) or prepend (if a string) upload_to to the filename, + then delegate further processing of the name to the storage backend. + Until the storage layer, all file paths are expected to be Unix style + (with forward slashes). + """ + if callable(self.upload_to): + filename = self.upload_to(instance, filename) + else: + dirname = force_text(datetime.datetime.now().strftime(force_str(self.upload_to))) + filename = posixpath.join(dirname, filename) + return self.storage.generate_filename(filename) def save_form_data(self, instance, data): # Important: None means "no change", other false value means "clear" diff --git a/docs/ref/files/storage.txt b/docs/ref/files/storage.txt index 976958dfd5cd..6cd6a6268bdd 100644 --- a/docs/ref/files/storage.txt +++ b/docs/ref/files/storage.txt @@ -147,6 +147,21 @@ The Storage Class Returns a filename based on the ``name`` parameter that's suitable for use on the target storage system. + .. method:: generate_filename(filename) + + .. versionadded:: 1.10 + + Validates the ``filename`` by calling :attr:`get_valid_name()` and + returns a filename to be passed to the :meth:`save` method. + + The ``filename`` argument may include a path as returned by + :attr:`FileField.upload_to <django.db.models.FileField.upload_to>`. + In that case, the path won't be passed to :attr:`get_valid_name()` but + will be prepended back to the resulting name. + + The default implementation uses :mod:`os.path` operations. Override + this method if that's not appropriate for your storage. + .. method:: listdir(path) Lists the contents of the specified path, returning a 2-tuple of lists; diff --git a/tests/file_storage/test_generate_filename.py b/tests/file_storage/test_generate_filename.py new file mode 100644 index 000000000000..44320138509b --- /dev/null +++ b/tests/file_storage/test_generate_filename.py @@ -0,0 +1,117 @@ +import os +import warnings + +from django.core.files.base import ContentFile +from django.core.files.storage import Storage +from django.db.models import FileField +from django.test import SimpleTestCase + + +class AWSS3Storage(Storage): + """ + Simulate an AWS S3 storage which uses Unix-like paths and allows any + characters in file names but where there aren't actual folders but just + keys. + """ + prefix = 'mys3folder/' + + def _save(self, name, content): + """ + This method is important to test that Storage.save() doesn't replace + '\' with '/' (rather FileSystemStorage.save() does). + """ + return name + + def get_valid_name(self, name): + return name + + def get_available_name(self, name, max_length=None): + return name + + def generate_filename(self, filename): + """ + This is the method that's important to override when using S3 so that + os.path() isn't called, which would break S3 keys. + """ + return self.prefix + self.get_valid_name(filename) + + +class GenerateFilenameStorageTests(SimpleTestCase): + + def test_filefield_get_directory_deprecation(self): + with warnings.catch_warnings(record=True) as warns: + warnings.simplefilter('always') + f = FileField(upload_to='some/folder/') + self.assertEqual(f.get_directory_name(), os.path.normpath('some/folder/')) + + self.assertEqual(len(warns), 1) + self.assertEqual( + warns[0].message.args[0], + 'FileField now delegates file name and folder processing to the ' + 'storage. get_directory_name() will be removed in Django 2.0.' + ) + + def test_filefield_get_filename_deprecation(self): + with warnings.catch_warnings(record=True) as warns: + warnings.simplefilter('always') + f = FileField(upload_to='some/folder/') + self.assertEqual(f.get_filename('some/folder/test.txt'), 'test.txt') + + self.assertEqual(len(warns), 1) + self.assertEqual( + warns[0].message.args[0], + 'FileField now delegates file name and folder processing to the ' + 'storage. get_filename() will be removed in Django 2.0.' + ) + + def test_filefield_generate_filename(self): + f = FileField(upload_to='some/folder/') + self.assertEqual( + f.generate_filename(None, 'test with space.txt'), + os.path.normpath('some/folder/test_with_space.txt') + ) + + def test_filefield_generate_filename_with_upload_to(self): + def upload_to(instance, filename): + return 'some/folder/' + filename + + f = FileField(upload_to=upload_to) + self.assertEqual( + f.generate_filename(None, 'test with space.txt'), + os.path.normpath('some/folder/test_with_space.txt') + ) + + def test_filefield_awss3_storage(self): + """ + Simulate a FileField with an S3 storage which uses keys rather than + folders and names. FileField and Storage shouldn't have any os.path() + calls that break the key. + """ + storage = AWSS3Storage() + folder = 'not/a/folder/' + + f = FileField(upload_to=folder, storage=storage) + key = 'my-file-key\\with odd characters' + data = ContentFile('test') + expected_key = AWSS3Storage.prefix + folder + key + + # Simulate call to f.save() + result_key = f.generate_filename(None, key) + self.assertEqual(result_key, expected_key) + + result_key = storage.save(result_key, data) + self.assertEqual(result_key, expected_key) + + # Repeat test with a callable. + def upload_to(instance, filename): + # Return a non-normalized path on purpose. + return folder + filename + + f = FileField(upload_to=upload_to, storage=storage) + + # Simulate call to f.save() + result_key = f.generate_filename(None, key) + self.assertEqual(result_key, expected_key) + + result_key = storage.save(result_key, data) + self.assertEqual(result_key, expected_key) diff --git a/tests/file_storage/tests.py b/tests/file_storage/tests.py index b489c025bf41..e8b7ac166cfe 100644 --- a/tests/file_storage/tests.py +++ b/tests/file_storage/tests.py @@ -599,7 +599,7 @@ class FileFieldStorageTests(TestCase): # 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.name, "django_test.txt") self.assertEqual(obj.empty.read(), b"more content") obj.empty.close() diff --git a/tests/model_fields/test_imagefield.py b/tests/model_fields/test_imagefield.py index c2908b06e4ac..8e9b60ac65ff 100644 --- a/tests/model_fields/test_imagefield.py +++ b/tests/model_fields/test_imagefield.py @@ -49,10 +49,10 @@ class ImageFieldTestMixin(object): os.mkdir(temp_storage_dir) file_path1 = os.path.join(os.path.dirname(upath(__file__)), "4x8.png") - self.file1 = self.File(open(file_path1, 'rb')) + self.file1 = self.File(open(file_path1, 'rb'), name='4x8.png') file_path2 = os.path.join(os.path.dirname(upath(__file__)), "8x4.png") - self.file2 = self.File(open(file_path2, 'rb')) + self.file2 = self.File(open(file_path2, 'rb'), name='8x4.png') def tearDown(self): """
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