func Compress(req zerver.Request, resp zerver.Response, chain zerver.FilterChain) {
encoding := req.AcceptEncodings()
if strings.Contains(encoding, zerver.ENCODING_GZIP) {
resp.SetContentEncoding(zerver.ENCODING_GZIP)
resp.Wrap(gzipWrapper)
} else if strings.Contains(encoding, zerver.ENCODING_DEFLATE) {
resp.SetContentEncoding(zerver.ENCODING_DEFLATE)
resp.Wrap(flateWrapper)
} else {
chain(req, resp)
return
}
chain(req, resp)
resp.RemoveHeader("Content-Length")
}