Bloom.Publish.EpubMaker.GetMediaType C# (CSharp) Method

        private string GetMediaType(string item)
        {
            switch (Path.GetExtension(item).Substring(1))
            {
                case "xml": // Review
                case "xhtml":
                    return "application/xhtml+xml";
                case "jpg":
                case "jpeg":
                    return "image/jpeg";
                case "png":
                    return "image/png";
                case "css":
                    return "text/css";
                case "woff":
                    return "application/font-woff"; // http://stackoverflow.com/questions/2871655/proper-mime-type-for-fonts
                case "ttf":
                case "otf":
                    // According to http://stackoverflow.com/questions/2871655/proper-mime-type-for-fonts, the proper
                    // mime type for ttf fonts is now application/font-sfnt. However, this fails the Pagina Epubcheck
                    // for epub 3.0.1, since the proper mime type for ttf was not put into the epub standard until 3.1.
                    // See https://github.com/idpf/epub-revision/issues/443 and http://www.idpf.org/epub/31/spec/epub-changes.html#sec-epub31-cmt.
                    // Since there are no plans to deprecate application/vnd.ms-opentype and it's unlikely to break
                    // any reader (unlikely the reader even uses the type field), we're just sticking with that.
                    return "application/vnd.ms-opentype"; // http://stackoverflow.com/questions/2871655/proper-mime-type-for-fonts
                case "smil":
                    return "application/smil+xml";
                case "mp4":
                    return "audio/mp4";
                case "mp3":
                    return "audio/mpeg";
            }
            throw new ApplicationException("unexpected file type in file " + item);
        }