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Disable bytes usage with postgres

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More often than not passing bytes to `txn.execute` is a bug (where we
meant to pass a string) that just happens to work if `BYTEA_OUTPUT` is
set to `ESCAPE`. However, this is a bit of a footgun so we want to
instead error when this happens, and force using `bytearray` if we
actually want to use bytes.
This commit is contained in:
Erik Johnston 2019-10-08 16:21:17 +01:00
parent e7631d84e6
commit 1d3858371e
3 changed files with 10 additions and 3 deletions
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7
synapse/storage/engines/postgres.py
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@ -22,6 +22,13 @@ class PostgresEngine(object):
def __init__(self, database_module, database_config):
self.module = database_module
self.module.extensions.register_type(self.module.extensions.UNICODE)
# Disables passing `bytes` to txn.execute, c.f. #6186. If you do
# actually want to use bytes than wrap it in `bytearray`.
def _disable_bytes_adapter(_):
raise Exception("Passing bytes to DB is disabled.")
self.module.extensions.register_adapter(bytes, _disable_bytes_adapter)
self.synchronous_commit = database_config.get("synchronous_commit", True)
self._version = None # unknown as yet