Before user login, the route is:
localhost:54274/Home
localhost:54274/Home/About
localhost:54274/Home/Contact
localhost:54274/Home/Login
localhost:54274/Home/Register
Once after user logged in, the route is:
1. localhost:54274/Project
2. localhost:54274/Project/Create
3. localhost:54274/Project/Edit/1
4. localhost:54274/Project/Delete/2
5. localhost:54274/Project/1/Requirement
6. localhost:54274/Project/1/Requirement/Create
7. localhost:54274/Project/1/Requirement/Edit/3
8. localhost:54274/Project/1/Requirement/Delete/4
I want the route changed to the username once after user logged in. For example, the username is hendyharf.
1. localhost:54274/hendyharf/Project
2. localhost:54274/hendyharf/Project/Create
3. localhost:54274/hendyharf/Project/Edit/1
4. localhost:54274/hendyharf/Project/Delete/2
5. localhost:54274/hendyharf/Project/1/Requirement
6. localhost:54274/hendyharf/Project/1/Requirement/Create
7. localhost:54274/hendyharf/Project/1/Requirement/Edit/3
8. localhost:54274/hendyharf/Project/1/Requirement/Delete/4
The controller for my project are only 3 controllers: HomeController, ProjectController, and RequirementController
My RouteConfig.cs is still in a default
public static void RegisterRoutes(RouteCollection routes)
{
routes.IgnoreRoute("{resource}.axd/{*pathInfo}");
routes.MapRoute(
name: "Default",
url: "{controller}/{action}/{id}",
defaults: new { controller = "Home", action = "Index", id = UrlParameter.Optional }
);
}
}
How should I supposed to do to make the route change to username?
You need to add a route to cover the case that has a user name.
public static void RegisterRoutes(RouteCollection routes)
{
routes.IgnoreRoute("{resource}.axd/{*pathInfo}");
routes.MapRoute(
name: "Username_Default",
url: "{username}/{controller}/{action}/{id}",
defaults: new { controller = "Home", action = "Index", id = UrlParameter.Optional },
constraints: new { username = new OwinUsernameConstraint() }
);
routes.MapRoute(
name: "Default",
url: "{controller}/{action}/{id}",
defaults: new { controller = "Home", action = "Index", id = UrlParameter.Optional }
);
}
But for that to work right, you will either need to add a literal string to your URL to identify the segment as username (i.e. username-{username}\) or you will need to make a constraint that only allows the user names that are in the database. Here is an example of the latter:
using MvcUsernameInUrl.Models;
using System;
using System.Collections.Generic;
using System.Globalization;
using System.Linq;
using System.Web;
using System.Web.Caching;
using System.Web.Routing;
namespace MvcUsernameInUrl
{
public class OwinUsernameConstraint : IRouteConstraint
{
private object synclock = new object();
public bool Match(HttpContextBase httpContext, Route route, string parameterName, RouteValueDictionary values, RouteDirection routeDirection)
{
if (parameterName == null)
throw new ArgumentNullException("parameterName");
if (values == null)
throw new ArgumentNullException("values");
object value;
if (values.TryGetValue(parameterName, out value) && value != null)
{
string valueString = Convert.ToString(value, CultureInfo.InvariantCulture);
return this.GetUsernameList(httpContext).Contains(valueString);
}
return false;
}
private IEnumerable<string> GetUsernameList(HttpContextBase httpContext)
{
string key = "UsernameConstraint.GetUsernameList";
var usernames = httpContext.Cache[key];
if (usernames == null)
{
lock (synclock)
{
usernames = httpContext.Cache[key];
if (usernames == null)
{
// Retrieve the list of usernames from the database
using (var db = ApplicationDbContext.Create())
{
usernames = (from users in db.Users
select users.UserName).ToList();
}
httpContext.Cache.Insert(
key: key,
value: usernames,
dependencies: null,
absoluteExpiration: Cache.NoAbsoluteExpiration,
slidingExpiration: TimeSpan.FromSeconds(15),
priority: CacheItemPriority.NotRemovable,
onRemoveCallback: null);
}
}
}
return (IEnumerable<string>)usernames;
}
}
}
NOTE: I strongly recommend using caching for this as in the example, since route constraints run on every request and it is not good to hit the database on every request. The downside of this is that it takes up to 15 seconds for the username to become active after it is registered. You could potentially get around this by updating the cache (in a thread-safe way) when a new account is registered in addition to adding the record to the database, which would make it available immediately in the route constraint.
Then it is simply a matter of doing a 302 redirect when the user logs in. You could potentially do that in a global filter.
using System.Web;
using System.Web.Mvc;
namespace MvcUsernameInUrl
{
public class RedirectLoggedOnUserFilter : IActionFilter
{
public void OnActionExecuting(ActionExecutingContext filterContext)
{
var routeValues = filterContext.RequestContext.RouteData.Values;
bool isLoggedIn = filterContext.HttpContext.User.Identity.IsAuthenticated;
bool requestHasUserName = routeValues.ContainsKey("username");
if (isLoggedIn && !requestHasUserName)
{
var userName = filterContext.HttpContext.User.Identity.Name;
// Add the user name as a route value
routeValues.Add("username", userName);
filterContext.Result = new RedirectToRouteResult(routeValues);
}
else if (!isLoggedIn && requestHasUserName)
{
// Remove the user name as a route value
routeValues.Remove("username");
filterContext.Result = new RedirectToRouteResult(routeValues);
}
}
public void OnActionExecuted(ActionExecutedContext filterContext)
{
// Do nothing
}
}
}
Usage
public class FilterConfig
{
public static void RegisterGlobalFilters(GlobalFilterCollection filters)
{
filters.Add(new RedirectLoggedOnUserFilter());
filters.Add(new HandleErrorAttribute());
}
}
MVC will automatically reuse route values from the request when genrating URLs, so there is no need to change any of your ActionLinks to include username.
Here is a working demo on GitHub using MVC5, OWIN, and ASP.NET Identity.
