override response headers

[max-mapper]

yo doggy,

i would like to do something like this

resp.setHeader('Content-Disposition', 'inline')
resp.setHeader('Content-Transfer-Encoding', 'binary')
resp.setHeader('Content-Type', 'text/plain')
filed('hello.txt').pipe(resp)

unfortunatly the content-type gets overridden to application/octet by the mimetype library and im not seeing a way to override that default from the filed api