How do I get the current subdomain within .Net Core middleware?
I have managed to work out my own answer in the meantime...comments appreciated.
private static string GetSubDomain(HttpContext httpContext) { var subDomain = string.Empty; var host = httpContext.Request.Host.Host; if (!string.IsNullOrWhiteSpace(host)) { subDomain = host.Split('.')[0]; } return subDomain.Trim().ToLower(); }
If you're using Cross-Domain, the best option is to use the Origin from Request-Header.Something like:
Request.Headers.TryGetValue("Origin", out var origin);and then manipulate the value with split or whatever you like.