lua script that sets dynamicMetadata

envoy_on_request.lua

 function envoy_on_request(request_handle)
                  local reqs_per_unit = request_handle:streamInfo():dynamicMetadata():get("envoy.filters.http.header_to_metadata")["rate.requests_per_unit"]
                  local reqs_unit = request_handle:streamInfo():dynamicMetadata():get("envoy.filters.http.header_to_metadata")["rate.unit"]
                  request_handle:logWarn("requests_per_unit value: " .. reqs_per_unit)
                  request_handle:logWarn("unit value: " .. reqs_unit) 

                  local rate_limits = { requests_per_unit = reqs_per_unit, unit = reqs_unit}

                  request_handle:streamInfo():dynamicMetadata():set("envoy.filters.http.ratelimit.override", "limit", rate_limits)

                  local all_of_it = request_handle:streamInfo():dynamicMetadata()

                  request_handle:logWarn("DATA IN METADATA")
                  PrintTable(all_of_it)

              end