Sitecore Programmatically publish content.

Global.asax.cs

using System.Web;
using System.Web.Mvc;
using System.Web.Routing;

namespace Site.Web
{
    public class MvcApplication : HttpApplication
    {
        protected void Application_Start()
        {
            RegisterRoutes(RouteTable.Routes);
        }

        public static void RegisterRoutes(RouteCollection routes)
        {
            routes.MapRoute("AutoPub","utility/publish", new { controller = "Utility", action = "Publish" });
        }
    }
}

UtilityController.cs

using System;
using System.IO;
using System.Linq;
using System.Web.Mvc;
using Sitecore.Data.Engines;
using Sitecore.Data.Proxies;
using Sitecore.Exceptions;
using Sitecore.Publishing;
using Sitecore.SecurityModel;

namespace Site.Web.Controllers.Shared
{
    public class UtilityController: Controller
    {
        public JsonResult Publish()
        {
            //make sure this does not execute on live site
            if (Request.Url != null && Request.Url.AbsoluteUri.Contains("site.com"))
            {
                return new JsonResult
                {
                    Data = "Invalid Request",
                    JsonRequestBehavior = JsonRequestBehavior.AllowGet
                };
            }

            var full = Request.QueryString["full"];

            // Set up the publish mode
            var publishMode = PublishMode.Smart;
            if (!string.IsNullOrWhiteSpace(full) &&
                (full == "1" || full.Equals("true", StringComparison.InvariantCultureIgnoreCase)))
            {
                publishMode = PublishMode.Full;
            }

            using (new SecurityDisabler())
            {
                //Target database
                var webDb = Sitecore.Configuration.Factory.GetDatabase("web");

                //Source db
                var masterDb = Sitecore.Configuration.Factory.GetDatabase("master");

                try
                {
                    foreach (var language in masterDb.Languages)
                    {
                        //loops on the languages and do a full republish on the whole sitecore content tree
                        var options = new PublishOptions(masterDb, webDb, publishMode, language, DateTime.Now) { RootItem = masterDb.Items["/sitecore"], RepublishAll = true, Deep = true };
                        var myPublisher = new Publisher(options);
                        myPublisher.Publish();
                    }
                    return new JsonResult
                    {
                        Data = "Publish to Web has completed",
                        JsonRequestBehavior = JsonRequestBehavior.AllowGet
                    };
                }
                catch (Exception ex)
                {
                    return new JsonResult
                    {
                        Data = "Could not publish the master database to the web" + ex.Message + ": " + ex.StackTrace,
                        JsonRequestBehavior = JsonRequestBehavior.AllowGet
                    };
                }
            }
        }
    }
}