how to detect response content-type in asp.net mvc

Question

hi, I've wrote very simple minification/compression handler that minify css and js by indicating request type (Request.RawUrl.EndsWith("css" || "js")), but i don't know an approach to indicate which response type is html and then minify that as HTML-content because in mvc isn't extension to checking.

thanks in advance ;)

Answer 1

If you wrote an HTTP handler to compress static resources it's up to you to set up the Content-Type header based on the file type:

if (Request.RawUrl.EndsWith("css"))
{
    Response.ContentType = "text/css";
} 
else if (Request.RawUrl.EndsWith("js"))
{
    Response.ContentType = "text/javascript";
}

Btw I would recommend you to minify/compress your static resources in advance and rely on the web server's gzip compression and client caching. I would avoid writing such handlers if it's not education purposes.

Answer 2

hm..., i think you misunderstood my goal/problem. here are my handler:

 public void ProcessRequest(HttpContext context)
    {
        if (Preferences.EnableHtmlMinification && **IfResponseContentIsHtml**)
        {
             //Do minify here
        }
        if (Preferences.EnableHtmlCompression && **IfResponseContentIsHtml**)
        {
            acceptEncoding = acceptEncoding.ToLower(CultureInfo.InvariantCulture);
            if (acceptEncoding.Contains("gzip"))
            {
                response.Filter = new HtmlCompressStream(response.Filter, CompressionMode.Compress, HtmlCompressStream.CompressionType.GZip);
                response.AddHeader("Content-encoding", "gzip");
            }
            else if (acceptEncoding.Contains("deflate"))
            {
                response.Filter = new HtmlCompressStream(response.Filter, CompressionMode.Compress, HtmlCompressStream.CompressionType.Deflate);
                response.AddHeader("Content-encoding", "deflate");
            }
        }
        else
        {
            response.Filter = new HtmlCompressStream(response.Filter, CompressionMode.Compress, HtmlCompressStream.CompressionType.None);
        }
    }