TagLib-sharp: Reading metadata from HttpPostedFile object

Question

User post their MP3s to my site and I would like to read the metadata from the files before they are stored in the CDN. TagLib-Sharp seems to be library to go for this, but I can't see any way to open a HttPostedFile, which I don't not want to save to disk, and retrieve the metadata.

Anybody have an example on how to do this with taglib-sharp?

Edit: It seems that IFileAbstraction can solve this. Anybody know how to use IFileAbstraction?

did you ever solve this problem? I'd like to do the same thing. — Bob, Jul 22 '12 at 08:26
unfortunately not. I dropped the feature my project at the time.. — AyKarsi, Jul 22 '12 at 09:28

score 5 · Answer 1 · answered Jan 16 '12 at 21:18

You would want to do something as follows. The caveat is that the steam has to be seekable an I do not know if HttpPostedFile.InputStream is.

TagLib.File myFile = TagLib.File.Create(new HttpPostedFileAbstraction(postedFile));

public class HttpPostedFileAbstraction : TagLib.File.IFileAbstraction
{
    private HttpPostedFile file;

    public HttpPostedFileAbstraction(HttpPostedFile file)
    {
        this.file = file;
    }

    public string Name {
        get { return file.FileName; }
    }

    public System.IO.Stream ReadStream {
        get { return file.InputStream; }
    }

    public System.IO.Stream WriteStream {
        get { throw new Exception("Cannot write to HttpPostedFile"); }
    }

    public void CloseStream (System.IO.Stream stream) { }
}

TagLib-sharp: Reading metadata from HttpPostedFile object

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