I'm trying not to use any third party tools, just a very simple tenant based system that uses a different subdomain or domain name per tenant. I will create navigation properties on the Tenant entity to things like BlogPosts, EventPosts, etc. and map them to ViewModels in the controller. If a tenant is not found, I will forward to another website where the user can sign-up for a tenant account. I could cache the tenant provider lookup so it doesn't hit the database, but it's probably not needed for a small site.

Looking for any feedback on a design like the code below.

In Startup.cs

services.AddScoped<TenantProvider>();

TenantProvider.cs:

public class TenantProvider

{

private readonly ApplicationDbContext _dbContext;

private readonly IHttpContextAccessor _httpContextAccessor;

public Tenant CurrentTenant { get; set; }

public TenantProvider(ApplicationDbContext dbContext, IHttpContextAccessor httpContextAccessor)

{

_dbContext = dbContext;

_httpContextAccessor = httpContextAccessor;

ResolveTenant();

}

protected void ResolveTenant()

{

var subdomain = _httpContextAccessor.HttpContext.Request.Host.Value.ToLower();

var tenant = _dbContext.Tenants

.FirstOrDefault(t => t.DomainName.Equals(subdomain, StringComparison.OrdinalIgnoreCase)

|| t.SubdomainName.Equals(subdomain, StringComparison.OrdinalIgnoreCase));

CurrentTenant = tenant;

if (tenant == null)

{

_httpContextAccessor.HttpContext.Response.Redirect("https://www.google.com/");

}

}

}

In Home Controller:

private readonly Tenant tenant;

public HomeController(TenantProvider tenantProvider)

{

_emailSender = emailSender;

tenant = tenantProvider.CurrentTenant;

}