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Don't crash when one of the configuration files is empty (#7341)

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If the admin adds a `.yaml` file that's either empty or doesn't parse into a dict to a config directory (e.g. `conf.d` for debs installs), stuff like https://github.com/matrix-org/synapse/issues/7322 would happen. This PR checks that the file is correctly parsed into a dict, or ignores it with a warning if it parses into any other type (including `None` for empty files).

Fixes https://github.com/matrix-org/synapse/issues/7322
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Brendan Abolivier 2020-04-27 15:01:03 +02:00 committed by GitHub
parent 7bfe0902ce
commit cc9eceb00d
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changelog.d/7341.bugfix Normal file
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@ -0,0 +1 @@
Fix bad error handling that would cause Synapse to crash if it's provided with a YAML configuration file that's either empty or doesn't parse into a key-value map.

6
synapse/config/_base.py
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@ -657,6 +657,12 @@ def read_config_files(config_files):
for config_file in config_files: for config_file in config_files:
with open(config_file) as file_stream: with open(config_file) as file_stream:
yaml_config = yaml.safe_load(file_stream) yaml_config = yaml.safe_load(file_stream)
if not isinstance(yaml_config, dict):
err = "File %r is empty or doesn't parse into a key-value map. IGNORING."
print(err % (config_file,))
continue
specified_config.update(yaml_config) specified_config.update(yaml_config)
if "server_name" not in specified_config: if "server_name" not in specified_config: