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cbbe3a808b
Why this change? This ensures that malicious requests cannot end up causing the logs to quickly fill up. The default chosen is sufficient for most legitimate requests to the Discourse application. When truncation happens, parsing of logs in supported format like lograge may break down.
30 lines
1.1 KiB
Ruby
30 lines
1.1 KiB
Ruby
# frozen_string_literal: true
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# This log formatter limits the number of characters in each log message to prevent malicious requests from filling up the disk
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# in a short amount of time. The number of characters is determined by the `log_line_max_chars` global setting which can be
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# configured via the `DISCOURSE_MAX_LOG_LINES` environment variable or via the `discourse_defaults.conf` file.
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class TruncateLogsFormatter < ::ActiveSupport::Logger::SimpleFormatter
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include ::ActiveSupport::TaggedLogging::Formatter
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def initialize(log_line_max_chars:)
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@log_line_max_chars = log_line_max_chars
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end
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def call(*args)
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# Lograge formatters are only called with a single argument instead of the usual 4 arguments of `severity`, `datetime`, `progname` and `message`.
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message =
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if args.length == 1
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args[0]
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else
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args[3]
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end
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if message.length > @log_line_max_chars
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newlines = message.length - message.chomp.length
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"#{message[0, @log_line_max_chars]}...(truncated)#{"\n" * newlines}"
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else
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message
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end
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end
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end
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