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check: improve "did not get expected metadata dict" diagnostic

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Marian Beermann 2016-11-13 02:00:39 +01:00
parent 639eba1635
commit a898297669
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1 changed files with 12 additions and 4 deletions
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16
borg/archive.py
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@ -1017,14 +1017,21 @@ def report(msg, chunk_id, chunk_no):
self.error_found = True
logger.error(msg)
def list_keys_safe(keys):
return ', '.join((k.decode() if isinstance(k, bytes) else str(k) for k in keys))
def valid_item(obj):
if not isinstance(obj, StableDict):
return False
return False, 'not a dictionary'
# A bug in Attic up to and including release 0.13 added a (meaningless) b'acl' key to every item.
# We ignore it here, should it exist. See test_attic013_acl_bug for details.
obj.pop(b'acl', None)
keys = set(obj)
return REQUIRED_ITEM_KEYS.issubset(keys) and keys.issubset(item_keys)
if not REQUIRED_ITEM_KEYS.issubset(keys):
return False, 'missing required keys: ' + list_keys_safe(REQUIRED_ITEM_KEYS - keys)
if not keys.issubset(item_keys):
return False, 'invalid keys: ' + list_keys_safe(keys - item_keys)
return True, ''
i = 0
for state, items in groupby(archive[b'items'], missing_chunk_detector):
@ -1040,10 +1047,11 @@ def valid_item(obj):
unpacker.feed(self.key.decrypt(chunk_id, cdata))
try:
for item in unpacker:
if valid_item(item):
valid, reason = valid_item(item)
if valid:
yield item
else:
report('Did not get expected metadata dict when unpacking item metadata', chunk_id, i)
report('Did not get expected metadata dict when unpacking item metadata (%s)' % reason, chunk_id, i)
except RobustUnpacker.UnpackerCrashed as err:
report('Unpacker crashed while unpacking item metadata, trying to resync...', chunk_id, i)
unpacker.resync()