String Matcher

:ref:StringMatcher <envoy_v3_api_msg_type.matcher.v3.StringMatcher> can be configured for one of the commonly used modes, or :ref:extended for custom usecases <envoy_v3_api_field_type.matcher.v3.StringMatcher.custom>.

Envoy includes an :ref:extension for running a Lua script <envoy_v3_api_msg_extensions.string_matcher.lua.v3.Lua> to determine whether a string matches.