/// <summary>
/// Creates a string representation of a <see cref="RequestCulture"/> for placement in a cookie.
/// </summary>
/// <param name="requestCulture">The <see cref="RequestCulture"/>.</param>
/// <returns>The cookie value.</returns>
public static string MakeCookieValue(RequestCulture requestCulture)
{
if (requestCulture == null)
{
throw new ArgumentNullException(nameof(requestCulture));
}
var seperator = _cookieSeparator[0].ToString();
return(string.Join(seperator,
$"{_culturePrefix}{requestCulture.Culture.Name}",
$"{_uiCulturePrefix}{requestCulture.UICulture.Name}"));
}
/// <summary>
/// Invokes the logic of the middleware.
/// </summary>
/// <param name="context">The <see cref="HttpContext"/>.</param>
/// <returns>A <see cref="Task"/> that completes when the middleware has completed processing.</returns>
public async Task Invoke(HttpContext context)
{
if (context == null)
{
throw new ArgumentNullException(nameof(context));
}
var requestCulture = _options.DefaultRequestCulture;
IRequestCultureProvider winningProvider = null;
if (_options.RequestCultureProviders != null)
{
foreach (var provider in _options.RequestCultureProviders)
{
var providerResultCulture = await provider.DetermineProviderCultureResult(context);
if (providerResultCulture == null)
{
continue;
}
var cultures = providerResultCulture.Cultures;
var uiCultures = providerResultCulture.UICultures;
CultureInfo cultureInfo = null;
CultureInfo uiCultureInfo = null;
if (_options.SupportedCultures != null)
{
cultureInfo = GetCultureInfo(
cultures,
_options.SupportedCultures,
_options.FallBackToParentCultures);
if (cultureInfo == null)
{
EnsureLogger(context);
_logger?.UnsupportedCultures(provider.GetType().Name, cultures);
}
}
if (_options.SupportedUICultures != null)
{
uiCultureInfo = GetCultureInfo(
uiCultures,
_options.SupportedUICultures,
_options.FallBackToParentUICultures);
if (uiCultureInfo == null)
{
EnsureLogger(context);
_logger?.UnsupportedUICultures(provider.GetType().Name, uiCultures);
}
}
if (cultureInfo == null && uiCultureInfo == null)
{
continue;
}
if (cultureInfo == null && uiCultureInfo != null)
{
cultureInfo = _options.DefaultRequestCulture.Culture;
}
if (cultureInfo != null && uiCultureInfo == null)
{
uiCultureInfo = _options.DefaultRequestCulture.UICulture;
}
var result = new RequestCulture(cultureInfo, uiCultureInfo);
if (result != null)
{
requestCulture = result;
winningProvider = provider;
break;
}
}
}
context.Features.Set <IRequestCultureFeature>(new RequestCultureFeature(requestCulture, winningProvider));
SetCurrentThreadCulture(requestCulture);
await _next(context);
}
private static void SetCurrentThreadCulture(RequestCulture requestCulture)
{
CultureInfo.CurrentCulture = requestCulture.Culture;
CultureInfo.CurrentUICulture = requestCulture.UICulture;
}