On tcp proxy with http handler.

[Andrewmatilde]

I am writing a tcp proxy which could handle http packet with hyper .
But when it comes to some custom method or error injected in http packet , hyper will suddenly return 4xx packet with on_parse_error .
I want my proxy with hyper could just pass through these packet.
Is there any way to handle the problem without write my custom hyper?
Thanks for any helps.