This change introduces error events for Table and Event readers. Users
can now specify an event that is called when an info, warning, or error
is emitted by their input reader. This can, e.g., be used to raise
notices in case errors occur when reading an important input stream.
Example:
event error_event(desc: Input::TableDescription, msg: string, level: Reporter::Level)
{
...
}
event bro_init()
{
Input::add_table([$source="a", $error_ev=error_event, ...]);
}
For the moment, this converts all errors in the Asciiformatter into
warnings (to show that they are non-fatal) - the Reader itself also has
to throw an Error to show that a fatal error occurred and processing
will be abort.
It might be nicer to change this and require readers to mark fatal
errors as such when throwing them.
Addresses BIT-1181
Before this patch, empty values were not hashed at all. Which had the unfortunate side-effect
that e.g. the lines
TEST -
and
- TEST
have the same hash values. On re-reads that means that the change will
be ignored.
This is probably pretty academic, but this patch changes it and adds a testcase.
Output of the reread test changes due to re-ordering of the output (probably
due to the fact that the internal hash values are changed and thus transferred
in a different order)
