func (mr *Reader) SetHeader(w http.ResponseWriter, ext string) {
	mimestring := mr.Get(ext)
	if mimestring == "" {
		// Default mime type
		mimestring = "application/octet-stream"
	}
	if mr.utf8 {
		mimestring += "; charset=utf-8"
	}
	w.Header().Add("Content-Type", mimestring)
}
func (mr *Reader) SetHeader(w http.ResponseWriter, ext string) {
	mimestring := mr.Get(ext)
	if mimestring == "" {
		
		mimestring = "application/octet-stream"
	}
	if mr.utf8 {
		mimestring += "; charset=utf-8"
	}
	w.Header().Add("Content-Type", mimestring)
}
func ( mr * Reader ) SetHeader ( w http . ResponseWriter , ext string ) { mimestring := mr . Get ( ext ) if mimestring == " " { // Default mime type mimestring = " " } if mr . utf8 { mimestring += " " } w . Header ( ) . Add ( " " , mimestring ) }
// SetHeader sets the Content-Type for a given ResponseWriter and filename extension
SetHeader sets the Content - Type for a given ResponseWriter and filename extension