Failed to handle empty header

[phamquiluan]

In case the header is empty, the algorithm can't extract the log properly. Please see the attached debug log.

(ins)(Pdb) n
> /ws/LogBatcher/logbatcher/util.py(96)log_to_dataframe()
-> log_contents = []
(ins)(Pdb) 
> /ws/LogBatcher/logbatcher/util.py(97)log_to_dataframe()
-> with open(log_file, 'r') as file:
(ins)(Pdb) 
> /ws/LogBatcher/logbatcher/util.py(98)log_to_dataframe()
-> for line in [next(file) for _ in range(size)]:
(ins)(Pdb) 
> /ws/LogBatcher/logbatcher/util.py(99)log_to_dataframe()
-> try:
(ins)(Pdb) 
> /ws/LogBatcher/logbatcher/util.py(100)log_to_dataframe()
-> match = regex.search(line.strip())
(ins)(Pdb) 
> /ws/LogBatcher/logbatcher/util.py(101)log_to_dataframe()
-> message = [match.group(header) for header in headers]
(ins)(Pdb) 
> /ws/LogBatcher/logbatcher/util.py(102)log_to_dataframe()
-> log_contents.append(message[-1])
(ins)(Pdb) p message
[]
(ins)(Pdb) p line
'GetCartAsync called with userId=f6baa338-17b8-4a60-9256-45e6b42573c9\n'

[phamquiluan]

After the fix bff40a3, the log without headers can be parsed correctly now.