String Expression

A string expression is a key followed by a string that specifies a string expression.

Syntax: <keyword>=<operator><expression>

• <keyword> The argument-keyword.
• <operator> For strings it can be substr, = or regexp.
• <expression> The value to match against value of <keyword> with operator <operator>

Currently substr and regexp are supported. Thus you enter filter.message=regexp:(foo|bar) to enter a regular expression and filter-message=substr:foo to enter a substring patter match.

Examples

filter+message=substr:foo
filter+message==foo
"filter+message==foo bar"
filter+message=regexp:(foo|bar)