Im using currently HAproxy but unfortunately HAproxy does not scrub data, is there any alternative open source proxy that does support scrubbing data

Question

im using HAproxy currently to relay some data but now i want to modify the request on the HAproxy before it is relayed to the other server .

according to documentation

HAproxy is not a data scrubber : it will not modify the body of requests nor responses.

so are there any open source alternatives of HAproxy that do support modifying request's body before it is relayed forward