How to route all subdomain on Net core 3.1

Question

I want to use a different controller when users enter a subdomain. I´m using RequireHost.

How can it works this with any domain? For example I'm using domain.test just for development, but in production I have another.

Startup.cs

app.UseEndpoints(endpoints =>
{
    endpoints.MapControllerRoute(
        name: "default",
        pattern: "{controller=Subdomain}/{action=Index}/{id?}").RequireHost("*.domain.test")


    endpoints.MapControllerRoute(
        name: "default",
        pattern: "{controller=Home}/{action=Index}/{id?}");
});

Possible duplicate: https://stackoverflow.com/questions/57172884/mapping-subdomains-to-areas-in-asp-net-core-3 — Bruno, Jul 14 '20 at 20:43

Jeremy Lakeman · Accepted Answer · 2020-07-21T01:26:46.963

1

RequireHost is almost the same as adding [Host("...")] attributes everywhere, except that they only apply to that route.

Evaluation of Host rules seems to occur in HostMatcherPolicy. Which should treat "*.domain.test" as matching all subdomains, but not the domain itself. You will need to add "domain.test" if you want that to match too.

However, you do have a second route that can match everything. I suspect you will need to explicitly list the valid hosts for your default route. Or split your controllers into different areas to ensure they only match the expected rule.

edited Jul 21 '20 at 01:26

answered Jul 21 '20 at 01:19

Jeremy Lakeman

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I understand, thanks, What happen if I can´t know the domain? I want to route all subdomain on whatever domain – Hans Felix Ramos Jul 21 '20 at 01:54
Wildcard subdomains do seem to be supported. Just note that you need to list domains separately from wildcard subdomains. – Jeremy Lakeman Jul 21 '20 at 03:08

How to route all subdomain on Net core 3.1

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