Fixed #10254: Changed the regex in get_valid_filename to allow unicode…

Fixed #10254: Changed the regex in get_valid_filename to allow unicode alphanumerics (thanks gulliver).  Also updated the file_uploads test for this case to check the name after saving the uploaded file. As it was the test ensured that files with unicode characters in their names could be uploaded, but it wasn't actually ensuring that the unicode characters were preserved through save.  


git-svn-id: http://code.djangoproject.com/svn/django/trunk@10388 bcc190cf-cafb-0310-a4f2-bffc1f526a37

django/utils/text.py

@@ -116,13 +116,13 @@ def get_valid_filename(s):
     """
     Returns the given string converted to a string that can be used for a clean
     filename. Specifically, leading and trailing spaces are removed; other
-    spaces are converted to underscores; and all non-filename-safe characters
-    are removed.
+    spaces are converted to underscores; and anything that is not a unicode
+    alphanumeric, dash, underscore, or dot, is removed.
     >>> get_valid_filename("john's portrait in 2004.jpg")
     u'johns_portrait_in_2004.jpg'
     """
     s = force_unicode(s).strip().replace(' ', '_')
-    return re.sub(r'[^-A-Za-z0-9_.]', '', s)
+    return re.sub(r'(?u)[^-\w.]', '', s)
 get_valid_filename = allow_lazy(get_valid_filename, unicode)
 
 def get_text_list(list_, last_word=ugettext_lazy(u'or')):

tests/regressiontests/file_uploads/tests.py

+#! -*- coding: utf-8 -*-
 import os
 import errno
 import shutil
@@ -12,6 +13,8 @@ from django.utils.hashcompat import sha_constructor
 from models import FileModel, temp_storage, UPLOAD_TO
 import uploadhandler
 
+UNICODE_FILENAME = u'test-0123456789_中文_Orléans.jpg'
+
 class FileUploadTests(TestCase):
     def test_simple_upload(self):
         post_data = {
@@ -32,16 +35,10 @@ class FileUploadTests(TestCase):
         file2.write('a' * (10 * 2 ** 20))
         file2.seek(0)
 
-        # This file contains chinese symbols for a name.
-        file3 = open(os.path.join(tdir, u'test_中文_Orl\u00e9ans.jpg'.encode('utf-8')), 'w+b')
-        file3.write('b' * (2 ** 10))
-        file3.seek(0)
-
         post_data = {
             'name': 'Ringo',
             'file_field1': open(file1.name),
             'file_field2': open(file2.name),
-            'file_unicode': file3,
             }
 
         for key in post_data.keys():
@@ -53,8 +50,24 @@ class FileUploadTests(TestCase):
 
         response = self.client.post('/file_uploads/verify/', post_data)
 
+        self.assertEqual(response.status_code, 200)
+
+    def test_unicode_file_name(self):
+        tdir = tempfile.gettempdir()
+
+        # This file contains chinese symbols and an accented char in the name.
+        file1 = open(os.path.join(tdir, UNICODE_FILENAME.encode('utf-8')), 'w+b')
+        file1.write('b' * (2 ** 10))
+        file1.seek(0)
+
+        post_data = {
+            'file_unicode': file1,
+            }
+
+        response = self.client.post('/file_uploads/unicode_name/', post_data)
+
         try:
-            os.unlink(file3.name)
+            os.unlink(file1.name)
         except:
             pass
 

tests/regressiontests/file_uploads/urls.py

@@ -4,6 +4,7 @@ import views
 urlpatterns = patterns('',
     (r'^upload/$',          views.file_upload_view),
     (r'^verify/$',          views.file_upload_view_verify),
+    (r'^unicode_name/$',    views.file_upload_unicode_name),
     (r'^echo/$',            views.file_upload_echo),
     (r'^quota/$',           views.file_upload_quota),
     (r'^quota/broken/$',    views.file_upload_quota_broken),

tests/regressiontests/file_uploads/views.py

@@ -5,6 +5,7 @@ from django.utils import simplejson
 from models import FileModel
 from uploadhandler import QuotaUploadHandler, ErroringUploadHandler
 from django.utils.hashcompat import sha_constructor
+from tests import UNICODE_FILENAME
 
 def file_upload_view(request):
     """
@@ -29,10 +30,6 @@ def file_upload_view_verify(request):
     form_data = request.POST.copy()
     form_data.update(request.FILES)
 
-    # Check to see if unicode names worked out.
-    if not request.FILES['file_unicode'].name.endswith(u'test_\u4e2d\u6587_Orl\xe9ans.jpg'):
-        return HttpResponseServerError()
-
     for key, value in form_data.items():
         if key.endswith('_hash'):
             continue
@@ -53,6 +50,32 @@ def file_upload_view_verify(request):
 
     return HttpResponse('')
 
+def file_upload_unicode_name(request):
+
+    # Check to see if unicode name came through properly.
+    if not request.FILES['file_unicode'].name.endswith(UNICODE_FILENAME):
+        return HttpResponseServerError()
+
+    response = None
+
+    # Check to make sure the exotic characters are preserved even
+    # through file save.
+    uni_named_file = request.FILES['file_unicode']
+    obj = FileModel.objects.create(testfile=uni_named_file)
+    if not obj.testfile.name.endswith(uni_named_file.name):
+        response = HttpResponseServerError()
+
+    # Cleanup the object with its exotic file name immediately.
+    # (shutil.rmtree used elsewhere in the tests to clean up the
+    # upload directory has been seen to choke on unicode
+    # filenames on Windows.)
+    obj.delete()
+
+    if response:
+        return response
+    else:
+        return HttpResponse('')
+
 def file_upload_echo(request):
     """
     Simple view to echo back info about uploaded files for tests.