[stem/master] Dropping validation on bandwidth-weights contents - tor-commits

27 May 2013

commit 7b396bdcebe7165df6ea6aaa911707e74974fa38
Author: Damian Johnson atagar@torproject.org
Date:   Sun May 26 18:14:15 2013 -0700
Dropping validation on bandwidth-weights contents
Our validation of network status documents included checking for the
    bandwidth-weights specified in the spec. This is because, according to the
    spec, they were all mandatory and new weights could not be added. Tor has
    loosened this restriction...
https://gitweb.torproject.org/torspec.git/commitdiff/ec3eaca
    https://trac.torproject.org/6872
---
 stem/descriptor/networkstatus.py                  |   17 -----------
 test/unit/descriptor/networkstatus/document_v3.py |   34 +++++----------------
 2 files changed, 8 insertions(+), 43 deletions(-)

diff --git a/stem/descriptor/networkstatus.py b/stem/descriptor/networkstatus.py
index 1081b10..f65c7dc 100644
--- a/stem/descriptor/networkstatus.py
+++ b/stem/descriptor/networkstatus.py
@@ -137,14 +137,6 @@ KEY_CERTIFICATE_PARAMS = (
   ('dir-key-certification', True),
 )
-BANDWIDTH_WEIGHT_ENTRIES = (
-  "Wbd", "Wbe", "Wbg", "Wbm",
-  "Wdb",
-  "Web", "Wed", "Wee", "Weg", "Wem",
-  "Wgb", "Wgd", "Wgg", "Wgm",
-  "Wmb", "Wmd", "Wme", "Wmg", "Wmm",
-)
-
def _parse_file(document_file, document_type = None, validate = True, is_microdescriptor = False, document_handler = stem.descriptor.DocumentHandler.ENTRIES):
   """
@@ -837,15 +829,6 @@ class _DocumentFooter(object):
           raise ValueError("A network status document's 'directory-footer' line shouldn't have any content, got '%s'" % line)
       elif keyword == "bandwidth-weights":
         self.bandwidth_weights = _parse_int_mappings(keyword, value, validate)
-
-        if validate:
-          weight_keys = tuple(sorted(self.bandwidth_weights.keys()))
-
-          if weight_keys != BANDWIDTH_WEIGHT_ENTRIES:
-            expected_label = ', '.join(BANDWIDTH_WEIGHT_ENTRIES)
-            actual_label = ', '.join(weight_keys)
-
-            raise ValueError("A network status document's 'bandwidth-weights' entries should be '%s', got '%s'" % (expected_label, actual_label))
       elif keyword == "directory-signature":
         for sig_value, block_contents in values:
           if not sig_value.count(" ") in (1, 2) or not block_contents:
diff --git a/test/unit/descriptor/networkstatus/document_v3.py b/test/unit/descriptor/networkstatus/document_v3.py
index 4984e67..366b516 100644
--- a/test/unit/descriptor/networkstatus/document_v3.py
+++ b/test/unit/descriptor/networkstatus/document_v3.py
@@ -14,7 +14,6 @@ from stem import Flag
 from stem.descriptor.networkstatus import HEADER_STATUS_DOCUMENT_FIELDS, \
                                           FOOTER_STATUS_DOCUMENT_FIELDS, \
                                           DEFAULT_PARAMS, \
-                                          BANDWIDTH_WEIGHT_ENTRIES, \
                                           DirectoryAuthority, \
                                           NetworkStatusDocumentV3, \
                                           _parse_file
@@ -31,6 +30,14 @@ from test.mocking import get_router_status_entry_v3, \
                          DOC_SIG, \
                          NETWORK_STATUS_DOCUMENT_FOOTER
+BANDWIDTH_WEIGHT_ENTRIES = (
+  "Wbd", "Wbe", "Wbg", "Wbm",
+  "Wdb",
+  "Web", "Wed", "Wee", "Weg", "Wem",
+  "Wgb", "Wgd", "Wgg", "Wgm",
+  "Wmb", "Wmd", "Wme", "Wmg", "Wmm",
+)
+
class TestNetworkStatusDocument(unittest.TestCase):
   def test_minimal_consensus(self):
@@ -720,31 +727,6 @@ class TestNetworkStatusDocument(unittest.TestCase):
     document = NetworkStatusDocumentV3(content, False)
     self.assertEquals(expected, document.bandwidth_weights)
-  def test_bandwidth_wights_omissions(self):
-    """
-    Leaves entries out of the 'bandwidth-wights' line.
-    """
-
-    # try parsing an empty value
-
-    content = get_network_status_document_v3({"bandwidth-weights": ""}, content = True)
-    self.assertRaises(ValueError, NetworkStatusDocumentV3, content)
-
-    document = NetworkStatusDocumentV3(content, False)
-    self.assertEquals({}, document.bandwidth_weights)
-
-    # drop individual values
-
-    for missing_entry in BANDWIDTH_WEIGHT_ENTRIES:
-      weight_entries = ["%s=5" % e for e in BANDWIDTH_WEIGHT_ENTRIES if e != missing_entry]
-      expected = dict([(e, 5) for e in BANDWIDTH_WEIGHT_ENTRIES if e != missing_entry])
-
-      content = get_network_status_document_v3({"bandwidth-weights": " ".join(weight_entries)}, content = True)
-      self.assertRaises(ValueError, NetworkStatusDocumentV3, content)
-
-      document = NetworkStatusDocumentV3(content, False)
-      self.assertEquals(expected, document.bandwidth_weights)
-
   def test_microdescriptor_signature(self):
     """
     The 'directory-signature' lines both with and without a defined method for

    