ReadBodyRoutePredicateFactory cannot predicate without body request #4035
Description
When using ReadBody predicate, i found if a request without body, the predicate cannot be execute. Then check the ReadBodyRoutePredicateFactory code and found the doOnNext will not be execute if none request body.
There are many without body requests, and these requests need to use ReadBodyRoutePredicateFactory for predicate, and so, suggest ReadBodyRoutePredicateFactory can support without body request.