Happstack jQuery and plain text file content

Question

I'm trying on a Happstack-build website to read out "user submitted" plain text files. The main functionallity should be to get the file content, for further usage a server side storage of the file isn't needed.

• What would be the way to realize this?
• Does the file need to be uploaded or could ajax handle it, and if not, why?
• A sample implementation would be helpful

Answer 1

This solution (using jQuery) was found, which is only HTML 5 supported:

$("#uploadbutton").change(function() {
    var reader = new FileReader();
    reader.onloadend = function() {
        $("#output").val(reader.result);
    }
    reader.readAsText(this.files[0]);
});

The textfile content (selected via "#uploadbutton") is read out and shown in "#output". No Happstack file upload was needed.