bambu_ftp.upload_file (and upload_bytes) wrapped the voidresp() call in a
broad "except Exception: log warning and proceed" because H2D printers
can take 30+ seconds to send the 226 and we don't want to fail on that.
But the same handler was swallowing ftplib.error_temp (e.g. 426 "Failure
reading network stream") from buggy printer firmware, which explicitly
means the data stream was cut mid-transfer and the file on the SD card
is partial.
Bambuddy then sent the print command anyway, and the printer surfaced a
generic "unable to parse 3mf file" error 30 seconds into the print
attempt -- with nothing in the log on the user side to suggest the
upload had actually failed.
Split the catch: ftplib.Error subclasses (server-reported failure)
re-raise so the outer handler returns False; everything else (socket
timeout etc.) keeps the existing proceed-with-warning behaviour so the
H2D 226 tolerance survives.
Two regression tests patch _ftp.voidresp to raise error_temp("426 ...")
and assert both upload_file() and upload_bytes() return False.
The underlying P2S firmware / TLS-data-channel issue that triggers the
426 for the reporter is separate -- this change just stops Bambuddy from
hiding it.
maziggy
1fac027654