Generic string router with DB in Asp.net Core - asp.net-core

Question

I am creating an internet store. And I want to add short URLs for products, categories and so on.
For example:
store.com/iphone-7-plus
This link should open the page with iPhone 7 plus product.
The logic is:
The server receives an URL
The server try it against existent routes
If there is no any route for this path - the server looks at a DB and try to find a product or category with such title.
Obvious solutions and why are they not applicable:
The first solution is a new route like that:
public class StringRouter : IRouter
{
private readonly IRouter _defaultRouter;
public StringRouter(IRouter defaultRouter)
{
_defaultRouter = defaultRouter;
}
public async Task RouteAsync(RouteContext context)
{
// special loggic
await _defaultRouter.RouteAsync(context);
}
public VirtualPathData GetVirtualPath(VirtualPathContext context)
{
return _defaultRouter.GetVirtualPath(context);
}
}
The problem is I can't provide any access to my DB from StringRouter.
The second solution is:
public class MasterController : Controller
{
[Route("{path}")]
public IActionResult Map(string path)
{
// some logic
}
}
The problem is the server receive literally all callings like store.com/robots.txt
So the question is still open - could you please advise me some applicable solution?

Answer 1

For accessing DbContext, you could try :
using Microsoft.Extensions.DependencyInjection;
public async Task RouteAsync(RouteContext context)
{
var dbContext = context.HttpContext.RequestServices.GetRequiredService<RouterProContext>();
var products = dbContext.Product.ToList();
await _defaultRouter.RouteAsync(context);
}
You also could try Middleware to check whether the reuqest is not exist, and then return the expected response.
public void Configure(IApplicationBuilder app, IHostingEnvironment env, IServiceProvider serviceProvider)
{
app.Use(async (context,next) => {
await next.Invoke();
// add your own business logic to check this if statement
if (context.Response.StatusCode == 404)
{
var db = context.RequestServices.GetRequiredService<RouterProContext>();
var users = db.Users.ToList();
await context.Response.WriteAsync("Request From Middleware");
}
});
//your rest code
}