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🔍 Improve debug connection trace output - #648
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This uses String#dump to print out control characters legibly, whic makes the CRLF line endings explicit and enables reliable copy/pasting of logged data for tests or debugging. This also improves how sent/rcvd data is interleaved (in my opinion). Note that, because client-sent data is generally in the main/application thread(s) (inside `#synchronize`), and server responses are received in the server thread (_not_ synchronized), this did have a threading race condition. So this updated version uses `synchronize` to log the server responses.
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This uses String#dump to print out control characters legibly, which makes the CRLF line endings explicit and enables reliable copy/pasting of logged data for tests or debugging.
This also improves how sent/rcvd data is interleaved (in my opinion).
Note that, because client-sent data is generally in the main/application thread(s) (inside
#synchronize), and server responses are received in the server thread (not synchronized), this did have a threading race condition. So this updated version usessynchronizeto log the server responses.