Grapevine: Input validation

grapevine-input-validation.cs

// the context will be passed into the method automatically by the router
server.Router.BeforeRouting += context =>
{
    // Do your input validation here
    if (!context.Request.Payload.Contains("elephant"))
    {
        // by sending a response to the request, no additional processing will occur.
        context.Response.SendResponse(HttpStatusCode.BadRequest, "no elephants allowed");
    }

    /*
     * No need to do anything else.
     * Once all before handlers have executed, the
     * routes will be executed, unless one of the event
     * handlers have already sent a response.
     */
};

server.Router.BeforeRouting += context =>
{
    /*
     * You can have multiples of these, too, if you
     * are initializing multiple autonomous things.
     */
};