Middleware skips some mimetype

[ahdyt]

Hi there I'm using the minify Middleware and would like to skip some mimetype like image/png, because it's causing error. Is there any docs about it?

[tdewolff]

Was this fixed or was it never a problem?

[ahdyt]

Hi, I end up using below workaround, would be good if there's cleaner option. For a mimetype with binary(e.g. image/png image/jpg) I think error, because it's not minified, instead it's deleted? image/svg is fine because it's plain text

`go

var fs http.Handler
if strings.Contains(r.URL.Path, ".html") || strings.Contains(r.URL.Path, ".css") || strings.Contains(r.URL.Path, ".js") || strings.Contains(r.URL.Path, ".svg") || strings.Contains(r.URL.Path, ".json") {
fs = http.StripPrefix(pathPrefix, minify.Middleware(http.FileServer(root)))
} else {
fs = http.StripPrefix(pathPrefix, http.FileServer(root))
}
fs.ServeHTTP(w, r)
`

[tdewolff]

I've pushed a fix so that unsupported mediatypes (extension or Content-Type) are passed without minification.