contentnegotiation

contentnegotiation.cs

public async Task Invoke(IDictionary<string, object> env)
{
    var ctx = new OwinContext(env);
    var accepts = ctx.Request.Accept;
    if (accepts != null && accepts == accepts.ToUpper())
    {
        ctx.Response.Body = new CapsStream(ctx.Response.Body);
    }
    await next(env);
}