How to ignore meta tags when using the AntiXssOutputEncoder?

I'm using an Anti XSS Output encoder similar t开发者_如何学Pythono the one htat Phil Hacck put forward here

Unfortuantely, it's running rampant over my Site.master and fouling up the meta-tags like so:

<meta name="robots" content="all,&#32;follow" />

And in Site.master it is written simply as:

<meta name="robots" content="all, follow" /> 

Which would be the correct output under normal circumstances, but I'd prefer to be able to skip the meta tags in the site.master.

Is there a way to do this while running your own HttpEncoder?

I don't think you get that information, but you could try whitelisting allowed values, if you don't have many meta tags like this.

A simplified version would be:

protected override void HtmlAttributeEncode(string value, TextWriter output)
{
    if (value != "all, follow")
    {
        output.Write(AntiXss.HtmlAttributeEncode(value));
    } 
    else
    {
        output.Write(value);
    }
}

Not ideal, but insofar as I can see, HttpEncoder doesn't hand you context.