def get_cached_zonefile( zonefile_hash, zonefile_dir=None ):
"""
Get a cached zonefile from local disk
Return None if not found
"""
if zonefile_dir is None:
zonefile_dir = get_zonefile_dir()
zonefile_path = os.path.join( zonefile_dir, zonefile_hash )
if not os.path.exists( zonefile_path ):
return None
with open(zonefile_path, "r") as f:
data = f.read()
# sanity check
if not verify_zonefile( data, zonefile_hash ):
log.debug("Corrupt zonefile '%s'; uncaching" % zonefile_hash)
remove_cached_zonefile( zonefile_hash, zonefile_dir=zonefile_dir )
return None
try:
zonefile_dict = blockstack_zones.parse_zone_file( data )
assert blockstack_client.is_user_zonefile( zonefile_dict ), "Not a user zonefile: %s" % zonefile_hash
return zonefile_dict
except Exception, e:
log.error("Failed to parse zonefile")
return None
def get_zonefile_from_storage(zonefile_hash, drivers=None):
"""
Get a zonefile from our storage drivers.
Return the zonefile dict on success.
Raise on error
"""
if not is_current_zonefile_hash(zonefile_hash):
raise Exception("Unknown zonefile hash")
zonefile_txt = blockstack_client.storage.get_immutable_data(
zonefile_hash,
hash_func=blockstack_client.get_blockchain_compat_hash,
deserialize=False,
drivers=drivers)
if zonefile_txt is None:
raise Exception("Failed to get data")
# verify
if blockstack_client.storage.get_zonefile_data_hash(
zonefile_txt) != zonefile_hash:
raise Exception("Corrupt zonefile: %s" % zonefile_hash)
# parse
try:
user_zonefile = blockstack_zones.parse_zone_file(zonefile_txt)
assert blockstack_client.is_user_zonefile(
user_zonefile), "Not a user zonefile: %s" % zonefile_hash
except AssertionError, ValueError:
raise Exception("Failed to load zonefile %s" % zonefile_hash)
def get_cached_zonefile(zonefile_hash, zonefile_dir=None):
"""
Get a cached zonefile from local disk
Return None if not found
"""
if zonefile_dir is None:
zonefile_dir = get_zonefile_dir()
zonefile_path = os.path.join(zonefile_dir, zonefile_hash)
if not os.path.exists(zonefile_path):
return None
with open(zonefile_path, "r") as f:
data = f.read()
# sanity check
if not verify_zonefile(data, zonefile_hash):
log.debug("Corrupt zonefile '%s'; uncaching" % zonefile_hash)
remove_cached_zonefile(zonefile_hash, zonefile_dir=zonefile_dir)
return None
try:
zonefile_dict = blockstack_zones.parse_zone_file(data)
assert blockstack_client.is_user_zonefile(
zonefile_dict), "Not a user zonefile: %s" % zonefile_hash
return zonefile_dict
except Exception, e:
log.error("Failed to parse zonefile")
return None
def get_cached_zonefile( zonefile_hash, zonefile_dir=None ):
"""
Get a cached zonefile dict from local disk
Return None if not found
"""
data = get_cached_zonefile_data( zonefile_hash, zonefile_dir=zonefile_dir )
if data is None:
return None
try:
zonefile_dict = blockstack_zones.parse_zone_file( data )
assert blockstack_client.is_user_zonefile( zonefile_dict ), "Not a user zonefile: %s" % zonefile_hash
return zonefile_dict
except Exception, e:
log.error("Failed to parse zonefile")
return None
def get_cached_zonefile( zonefile_hash, zonefile_dir=None ):
"""
Get a cached zonefile dict from local disk
Return None if not found
"""
data = get_cached_zonefile_data( zonefile_hash, zonefile_dir=zonefile_dir )
if data is None:
return None
try:
zonefile_dict = blockstack_zones.parse_zone_file( data )
assert blockstack_client.is_user_zonefile( zonefile_dict ), "Not a user zonefile: %s" % zonefile_hash
return zonefile_dict
except Exception, e:
log.error("Failed to parse zonefile")
return None
def get_zonefile_from_storage( zonefile_hash, drivers=None ):
"""
Get a zonefile from our storage drivers.
Return the zonefile dict on success.
Raise on error
"""
if not is_current_zonefile_hash( zonefile_hash ):
raise Exception("Unknown zonefile hash")
zonefile_txt = blockstack_client.storage.get_immutable_data( zonefile_hash, hash_func=blockstack_client.get_blockchain_compat_hash, deserialize=False, drivers=drivers )
if zonefile_txt is None:
raise Exception("Failed to get data")
# verify
if blockstack_client.storage.get_zonefile_data_hash( zonefile_txt ) != zonefile_hash:
raise Exception("Corrupt zonefile: %s" % zonefile_hash)
# parse
try:
user_zonefile = blockstack_zones.parse_zone_file( zonefile_txt )
assert blockstack_client.is_user_zonefile( user_zonefile ), "Not a user zonefile: %s" % zonefile_hash
except AssertionError, ValueError:
raise Exception("Failed to load zonefile %s" % zonefile_hash)
