Fixed #26744 -- Fixed a typo in regex for Accept-Language header parsing.

django/utils/translation/trans_real.py

@@ -39,7 +39,7 @@ CONTEXT_SEPARATOR = "\x04"
 # and RFC 3066, section 2.1
 accept_language_re = re.compile(r'''
         ([A-Za-z]{1,8}(?:-[A-Za-z0-9]{1,8})*|\*)      # "en", "en-au", "x-y-z", "es-419", "*"
-        (?:\s*;\s*q=(0(?:\.\d{,3})?|1(?:.0{,3})?))?   # Optional "q=1.00", "q=0.8"
+        (?:\s*;\s*q=(0(?:\.\d{,3})?|1(?:\.0{,3})?))?  # Optional "q=1.00", "q=0.8"
         (?:\s*,\s*|$)                                 # Multiple accepts per header.
         ''', re.VERBOSE)
 
@@ -790,10 +790,7 @@ def parse_accept_lang_header(lang_string):
         if first:
             return []
         if priority:
-            try:
-                priority = float(priority)
-            except ValueError:
-                return []
+            priority = float(priority)
         if not priority:        # if priority is 0.0 at this point make it 1.0
             priority = 1.0
         result.append((lang, priority))

tests/i18n/tests.py

@@ -1317,6 +1317,7 @@ class MiscTests(SimpleTestCase):
         self.assertEqual([('*', 1.0)], p('*'))
         self.assertEqual([('de', 1.0)], p('de;q=0.'))
         self.assertEqual([('en', 1.0), ('*', 0.5)], p('en; q=1.0, * ; q=0.5'))
+        self.assertEqual([('en', 1.0)], p('en; q=1,'))
         self.assertEqual([], p(''))
 
         # Bad headers; should always return [].
@@ -1336,7 +1337,7 @@ class MiscTests(SimpleTestCase):
         self.assertEqual([], p('de;q=0.a'))
         self.assertEqual([], p('12-345'))
         self.assertEqual([], p(''))
-        self.assertEqual([], p('en; q=1,'))
+        self.assertEqual([], p('en;q=1e0'))
 
     def test_parse_literal_http_header(self):
         """