| message[, level]) | 
ap_log_cerror
  function. message is a string with the error message,
  level is one of the following flags constants:
    APLOG_EMERG
    APLOG_ALERT
    APLOG_CRIT
    APLOG_ERR
    APLOG_WARNING
    APLOG_NOTICE
    APLOG_INFO
    APLOG_DEBUG
    APLOG_NOERRNO
If you need to write to log and do not have a reference to a connection or request object, use the apache.log_error function.
| [length]) | 
EXHAUSTIVE mode in the http server code).
This method should only be used inside Connection Handlers.
| [length]) | 
Reads a line from the connection or up to length bytes.
This method should only be used inside Connection Handlers.
| string) | 
Writes string to the client.
This method should only be used inside Connection Handlers.