Logging binary data in log-format and X flag (no replies)

Hi,

I'm currently using HAProxy 1.6.3 in a SSL termination setup and recently
tried to add the SSL session ID to the log output.

According to the documentation I understood that using the X flag would
convert the content to readable hex format, but using this logs only garbage:

log-format sid:%{+X}[ssl_fc_session_id]

sid:<97>j<E1>#016<CB><8F>#006<98><E2><FF><D1>#177<DD>vAS#026O<F4>...

Using the hex converter instead produces the expected readable output:

log-format sid:%[ssl_fc_session_id,hex]

sid:9AF7D7689AA5C173ED0B17DD529B56D8F5C2149C7DCBFFB37A279E6C8138CB33

Is this "works as designed"?


Thx,
Peter