func Gzip(ctx *stack.Context, next http.Handler) http.Handler {
return http.HandlerFunc(func(w http.ResponseWriter, req *http.Request) {
if !strings.Contains(req.Header.Get("Accept-Encoding"), "gzip") ||
ctx.Get("handled").(bool) == true {
// move on to next handler in the chain
next.ServeHTTP(w, req)
return
}
w.Header().Set("Content-Encoding", "gzip")
gz := gzip.NewWriter(w)
defer gz.Close()
gzw := gzipResponseWriter{Writer: gz, ResponseWriter: w}
ctx.Put("handled", true)
defer ctx.Delete("handled")
next.ServeHTTP(gzw, req)
})
}
func Deflate(ctx *stack.Context, next http.Handler) http.Handler {
return http.HandlerFunc(func(w http.ResponseWriter, req *http.Request) {
if !strings.Contains(req.Header.Get("Accept-Encoding"), "deflate") ||
ctx.Get("handled").(bool) == true {
next.ServeHTTP(w, req)
return
}
fl, err := flate.NewWriter(w, -1) // Use default compression level
if err != nil {
next.ServeHTTP(w, req)
return
}
w.Header().Set("Content-Encoding", "deflate")
defer fl.Close()
flw := flateResponseWriter{Writer: fl, ResponseWriter: w}
ctx.Put("handled", true)
defer ctx.Delete("handled")
next.ServeHTTP(flw, req)
})
}