/// <summary>
/// Called before an action method executes.
/// </summary>
/// <param name="filterContext">The filter context.</param>
public void OnActionExecuting(ActionExecutingContext filterContext)
{
var request = filterContext.HttpContext.Request;
var values = filterContext.RouteData.Values;
// Value is already injected from a route declaration
if (values.ContainsKey("language"))
{
return;
}
// Value is part of the explicit route and is the preferred language (from those available)
var preferred = _session.GetLanguageFromSessionOrService(filterContext.HttpContext);
var url = _session.GetUrlFromRequest(filterContext.HttpContext.Request);
if (url.EndsWithAnyIgnoreCase(string.Format("/{0}", preferred), string.Format("/{0}/", preferred)))
{
return;
}
// Value is loose in the query string, i.e. '/?language=en'
if (request.QueryString["language"] != null)
{
_session.Set(filterContext.HttpContext, request.QueryString["language"]);
preferred = _session.GetLanguageFromSessionOrService(filterContext.HttpContext);
}
// Value is part of the explicit route, i.e. '/about/en' but not the preferred language
var languages = request.UserLanguages ?? new[] { I18N.DefaultTwoLetterISOLanguageName };
foreach (var language in languages.Where(language => !string.IsNullOrWhiteSpace(language)))
{
var semiColonIndex = language.IndexOf(';');
var token = string.Format("/{0}", semiColonIndex > -1 ? language.Substring(0, semiColonIndex) : language);
if (!url.EndsWithAnyIgnoreCase(token, string.Format("{0}/", token)))
{
continue;
}
// This is an explicit language request, override preferences
_session.Set(filterContext.HttpContext, token.Substring(1));
preferred = _session.GetLanguageFromSessionOrService(filterContext.HttpContext);
}
RedirectWithLanguage(filterContext, values, preferred);
}
public override VirtualPathData GetVirtualPath(RequestContext context, RouteValueDictionary values)
{
var result = _route.GetVirtualPath(context, values);
if (result != null && result.VirtualPath != null)
{
var request = context.HttpContext.Request;
if (!values.ContainsKey("language"))
{
if (request.QueryString["language"] != null)
{
result.VirtualPath = string.Format("{0}/{1}", result.VirtualPath, request.QueryString["language"]);
}
else
{
var language = _session.GetLanguageFromSessionOrService(context.HttpContext);
var token = string.Format("/{0}", language);
var url = _session.GetUrlFromRequest(context.HttpContext.Request);
if (url.EndsWithAnyIgnoreCase(token, string.Format("{0}/", token)))
{
result.VirtualPath = result.VirtualPath.Equals("")
? language
: string.Format("{0}/{1}", result.VirtualPath, language);
}
}
}
else
{
// Use pre-injected route value
var baseUrl = context.HttpContext.Request.Url;
if (baseUrl != null)
{
var relativeUrl = new Uri(baseUrl, values["language"].ToString()).PathAndQuery.Substring(1);
result.VirtualPath = relativeUrl;
}
}
}
return(result);
}