Не совсем лучшее решение ... но сработало:
На ConfigureServices добавлено пользовательское соглашение, которое принимает параметр страны только с двумя кодами стран США и CA:
options.Conventions.Add(new CountryTemplateRouteModelConvention());
В этом классе:
public class CountryTemplateRouteModelConvention : IPageRouteModelConvention
{
public void Apply(PageRouteModel model)
{
var selectorCount = model.Selectors.Count;
for (var i = 0; i < selectorCount; i++)
{
var selector = model.Selectors[i];
// selector.AttributeRouteModel.SuppressLinkGeneration = false;
//we are not adding the selector, but replacing the existing one
model.Selectors.Add(new SelectorModel
{
AttributeRouteModel = new AttributeRouteModel
{
Order = -1,
Template = AttributeRouteModel.CombineTemplates(@"{country:length(2):regex(^(us|ca)$)}", selector.AttributeRouteModel.Template),
}
});
}
}
}
Затем, перед использованием UseMvc при настройке, я использовал два типа правил перезаписи:
var options = new RewriteOptions();
options.Add(new CountryBasedOnDomainRewriteRule(domains: GetDomainsWhereCountryComesFromDomain(Configuration)));
options.Add(new CountryBasedOnPathRewriteRule(domains: GetDomainsWhereCountryComesFromPath(Configuration)));
app.UseRewriter(options);
Методы GetDomainsWhereCountryComesFromDomain и GetDomainsWhereCountryComesFromPath просто читают из наборов приложений домены, где я хочу иметь один язык, и домены, где я хочу получить язык по URL-пути.
Теперь два класса IRule:
public class CountryBasedOnPathRewriteRule : IRule
{
private readonly string[] domains;
public CountryBasedOnPathRewriteRule(string[] domains)
{
this.domains = domains;
}
public void ApplyRule(RewriteContext context)
{
string hostname = context.HttpContext.Request.Host.Host.ToLower();
if (!domains.Contains(hostname)) return;
//only traffic that has the country on the path is valid. examples:
// www.mysite.com/ -> www.mysite.com/US/
// www.mysite.com/Cart -> www.mysite.com/US/Cart
var path = context.HttpContext.Request.Path.ToString().ToLower();
/* let's exclude the error page, as method UseExceptionHandler doesn't accept the country parameter */
if (path == "/" || path == "/error")
{
//redirect to language default
var response = context.HttpContext.Response;
response.StatusCode = (int)HttpStatusCode.Moved;
response.Headers[HeaderNames.Location] = "/us/"; //default language/country
context.Result = RuleResult.EndResponse;
}
string pathFirst = path.Split('/')?[1];
if (pathFirst.Length != 2) /* US and CA country parameter is already enforced by the routing */
{
var response = context.HttpContext.Response;
response.StatusCode = (int)HttpStatusCode.NotFound;
context.Result = RuleResult.EndResponse;
}
}
}
public class CountryBasedOnDomainRewriteRule : IRule
{
private readonly string[] domains;
public CountryBasedOnDomainRewriteRule(string[] domains)
{
this.domains = domains;
}
public void ApplyRule(RewriteContext context)
{
string hostname = context.HttpContext.Request.Host.Host.ToLower();
if (!domains.Contains(hostname)) return;
var path = context.HttpContext.Request.Path.ToString().ToLower();
string pathFirst = path.Split('/')?[1];
if (pathFirst.Length == 2) //we are trying to use www.mysite.co.uk/us which is not allowed
{
var response = context.HttpContext.Response;
response.StatusCode = (int)HttpStatusCode.NotFound;
context.Result = RuleResult.EndResponse;
}
}
}
И это все.