add name_check to /info

Also removed a bunch of unnecessary unquotes. Just use path_info
instead (it's already unquoted).

Partial-Bug: #1670915

Change-Id: If1af43485b4708cab6c4b5d7f6f0a334d8752518

api-ref/source/storage-object-services.inc

@@ -165,6 +165,11 @@ is a normal object and not a copy of the manifest. Instead it is a
 concatenation of all the segment objects. This means that you
 cannot copy objects larger than 5 GB.
 
+Note that the provider may have limited the characters which are allowed
+in an object name. Any name limits are exposed under the ``name_check`` key
+in the ``/info`` discoverability response. Regardless of ``name_check``
+limitations, names must be URL quoted UTF-8.
+
 To create custom metadata, use the
 ``X-Object-Meta-name`` header, where ``name`` is the name of the metadata
 item.

swift/common/middleware/name_check.py

@@ -40,10 +40,8 @@ The filter returns HTTPBadRequest if path is invalid.
 @author: eamonn-otoole
 '''
 
-from six.moves.urllib.parse import unquote
-
 import re
-from swift.common.utils import get_logger
+from swift.common.utils import get_logger, register_swift_info
 
 from swift.common.swob import Request, HTTPBadRequest
 
@@ -69,6 +67,15 @@ class NameCheckMiddleware(object):
             self.forbidden_regexp_compiled = None
         self.logger = get_logger(self.conf, log_route='name_check')
 
+        self.register_info()
+
+    def register_info(self):
+        register_swift_info('name_check',
+                            forbidden_chars=self.forbidden_chars,
+                            maximum_length=self.maximum_length,
+                            forbidden_regexp=self.forbidden_regexp
+                            )
+
     def check_character(self, req):
         '''
         Checks req.path for any forbidden characters
@@ -79,7 +86,7 @@ class NameCheckMiddleware(object):
         self.logger.debug("name_check: self.forbidden_chars %s" %
                           self.forbidden_chars)
 
-        return any((c in unquote(req.path)) for c in self.forbidden_chars)
+        return any((c in req.path_info) for c in self.forbidden_chars)
 
     def check_length(self, req):
         '''
@@ -87,7 +94,7 @@ class NameCheckMiddleware(object):
         Returns True if the length exceeds the maximum
         Returns False if the length is <= the maximum
         '''
-        length = len(unquote(req.path))
+        length = len(req.path_info)
         return length > self.maximum_length
 
     def check_regexp(self, req):
@@ -103,8 +110,7 @@ class NameCheckMiddleware(object):
         self.logger.debug("name_check: self.forbidden_regexp %s" %
                           self.forbidden_regexp)
 
-        unquoted_path = unquote(req.path)
-        match = self.forbidden_regexp_compiled.search(unquoted_path)
+        match = self.forbidden_regexp_compiled.search(req.path_info)
         return (match is not None)
 
     def __call__(self, env, start_response):

test/unit/common/middleware/test_name_check.py

@@ -21,10 +21,12 @@ Created on February 29, 2012
 @author: eamonn-otoole
 '''
 
+import numbers
 import unittest
 
 from swift.common.swob import Request, Response
 from swift.common.middleware import name_check
+from swift.common import utils
 
 MAX_LENGTH = 255
 FORBIDDEN_CHARS = '\'\"<>`'
@@ -116,5 +118,25 @@ class TestNameCheckMiddleware(unittest.TestCase):
             self.assertEqual(resp.body, 'OK')
 
 
+class TestSwiftInfo(unittest.TestCase):
+    def setUp(self):
+        utils._swift_info = {}
+        utils._swift_admin_info = {}
+
+    def test_registered_defaults(self):
+        name_check.filter_factory({})(FakeApp())
+        swift_info = utils.get_swift_info()
+        self.assertTrue('name_check' in swift_info)
+        self.assertTrue(isinstance(
+            swift_info['name_check'].get('maximum_length'),
+            numbers.Integral))
+        self.assertTrue(isinstance(
+            swift_info['name_check'].get('forbidden_chars'),
+            str))
+        self.assertTrue(isinstance(
+            swift_info['name_check'].get('forbidden_regexp'),
+            str))
+
+
 if __name__ == '__main__':
     unittest.main()