/// <summary>
/// Gets a handler that redirects the request
/// to an url that has the default language for the
/// application.
/// </summary>
private static IHttpHandler GetDefaultLocaleRedirectHandler(RequestContext requestContext)
{
var routeValues = requestContext.RouteData.Values;
routeValues["culture"] =
LanguageDefinitions.GetClosestLanguageCode(requestContext.HttpContext.Request.UserLanguages);
return(new RedirectHandler(new UrlHelper(requestContext).RouteUrl(routeValues)));
}
public void LanguageResolver_GetsDefaultLanguage_IfNoneSupplied()
{
Assert.AreEqual("pt", LanguageDefinitions.GetClosestLanguageCode(null));
}
public void LanguageResolver_GetsDefaultLanguage_IfFallbacksAreNotSupported()
{
var otherLanguages = new string[] { "de-DE", "de", "fr-FR" };
Assert.AreEqual("pt", LanguageDefinitions.GetClosestLanguageCode(otherLanguages));
}
public void LanguageResolver_GetsFallbackLanguage_IfFallbacksAreAccepted()
{
var otherLanguages = new string[] { "de-DE", "de", "fr", "en-US", "en", "pt" };
Assert.AreEqual("en", LanguageDefinitions.GetClosestLanguageCode(otherLanguages));
}
public void LanguageResolver_GetsDefaultLanguage_IfNoneMatch()
{
var cultureCode = "de-DE";
Assert.AreEqual("pt", LanguageDefinitions.GetClosestLanguageCode(cultureCode));
}
public void LanguageResolver_GetsClosestLanguage_IfItDoesntExist()
{
var cultureCode = "en-US";
Assert.AreEqual("en", LanguageDefinitions.GetClosestLanguageCode(cultureCode));
}
public void LanguageResolver_GetsLanguage_IfExactMatch()
{
var cultureCode = "en";
Assert.AreEqual("en", LanguageDefinitions.GetClosestLanguageCode(cultureCode));
}
protected override IHttpHandler GetHttpHandler(RequestContext requestContext)
{
// Get the language from the url -- most prioritary.
var urlLocale = requestContext.RouteData.Values["culture"] as string ?? "";
var culturesToTest = new List <string>();
if (!string.IsNullOrEmpty(urlLocale))
{
culturesToTest.Add(urlLocale);
}
// Get the language from the cookie, if it exists -- 2nd priority.
var cookieLocale = requestContext.HttpContext.Request.Cookies["locale"];
if (cookieLocale != null)
{
culturesToTest.Add(cookieLocale.Value);
}
// Add all the user's requested languages from the Accept-Language header -- 3rd priority.
culturesToTest.AddRange(requestContext
.HttpContext
.Request
.UserLanguages
.Select(l => l.Split(';')[0])
.ToList());
var chosenLanguage = LanguageDefinitions.GetClosestLanguageCode(culturesToTest.ToArray());
var localeCookie = new HttpCookie("locale", chosenLanguage);
localeCookie.Expires = DateTime.Now.AddYears(2);
requestContext.HttpContext.Response.SetCookie(localeCookie);
// Redirect if the url locale doesn't match the culture name.
if (!LanguageDefinitions.AreCodesEquivalent(chosenLanguage, urlLocale))
{
var routeValues = requestContext.RouteData.Values;
routeValues["culture"] =
LanguageDefinitions.GetClosestLanguageCode(chosenLanguage);
return(new RedirectHandler(new UrlHelper(requestContext).RouteUrl(routeValues)));
}
try
{
// Set the thread's language.
var culture = CultureInfo.GetCultureInfo(chosenLanguage);
Thread.CurrentThread.CurrentCulture = culture;
Thread.CurrentThread.CurrentUICulture = culture;
}
catch (CultureNotFoundException)
{
// if CultureInfo.GetCultureInfo throws exception
// we should redirect with default locale
return(GetDefaultLocaleRedirectHandler(requestContext));
}
return(base.GetHttpHandler(requestContext));
}
