MEDIUM: log-format: make the LF parser aware of sample expressions' end
For a very long time it used to be impossible to pass a closing square
bracket as a valid character in argument to a sample fetch function or
to a converter because the LF parser used to stop on the first such
character found and to pass what was between the first '[' and the first
']' to sample_parse_expr().
This patch addresses this by passing the whole string to sample_parse_expr()
which is the only one authoritative to indicate the first character that
does not belong to the expression. The LF parser then verifies it matches
a ']' or fails. As a result it is finally possible to write rules such as
the following, which is totally valid an unambigous :
http-request redirect location %[url,regsub([.:/?-],!,g)]
|-----| | |
arg1 | `---> arg3
`-----> arg2
|-----------------|
converter
|---------------------|
sample expression
|------------------------|
log-format tag
2 files changed