\u00d6ncelikle \u00f6rne\u011fimizde kullanaca\u011f\u0131m\u0131z Customer<\/strong> model\u2019ini tan\u0131mlayal\u0131m:<\/p>\n Customer model\u2019ini olu\u015fturduktan sonra, \u00f6rne\u011fimiz i\u00e7in olan statik dil verilerini tutabilmek i\u00e7in solution \u00fczerine App_GlobalResources<\/strong> isimli Asp.Net Folder\u2019\u0131n\u0131 ekleyece\u011fiz ve i\u00e7erisine iki adet \u201cWebApiResource.resx\u201d ve \u201cWebAPIResource.en-US.resx\u201d isimli resource item\u2019lar\u0131n\u0131 tan\u0131ml\u0131yor olaca\u011f\u0131z. \u0130lk olarak bizim i\u00e7in default resource bilgisi olarak kabul edece\u011fimiz T\u00fcrk\u00e7e i\u00e7eriklerin yer alaca\u011f\u0131 \u201cWebAPIResource.resx\u201d isimli resource dosyas\u0131n\u0131 ekleyelim ve i\u00e7eri\u011fini a\u015fa\u011f\u0131daki \u015fekildeki gibi girelim:<\/p>\n \u015eimdi \u0130ngilizce i\u00e7eriklerin yer alaca\u011f\u0131 \u201cWebAPIResource.en-US.resx\u201d isimli resource dosyas\u0131n\u0131 ekleyelim ve bununda i\u00e7eri\u011fini a\u015fa\u011f\u0131daki gibi girelim:<\/p>\n Statik dilleri tuttu\u011fumuz resource dosyalar\u0131n\u0131 olu\u015fturduktan sonra a\u015fa\u011f\u0131daki gibi bir solution yap\u0131s\u0131 olacakt\u0131r.<\/p>\n Resource\u2019lar\u0131 tamamlad\u0131ktan sonra \u015fimdi client \u00fczerinden gelecek olan Accept-Language header bilgisini al\u0131p, API taraf\u0131nda o dil bilgisi destekleniyor ise, culture bilgisini o dil bilgisine g\u00f6re g\u00fcncelleyece\u011fiz. Bu sayede statik resource\u2019lar g\u00fcncellenen culture bilgisine g\u00f6re geriye de\u011fer d\u00f6neceklerdir.<\/p>\n Culture bilgisini handle edebilmek i\u00e7in ise yeni bir MessageHandler olu\u015fturaca\u011f\u0131z. Olu\u015fturacak oldu\u011fumuz handler\u2019\u0131 System.Net.Http.DelegatingHandler<\/strong>\u2019dan t\u00fcretece\u011fiz ve SendAsync<\/strong> method\u2019unu override ederek, request \u00fczerinde g\u00f6nderilen Accept-Language bilgilerine ula\u015faca\u011f\u0131z. Dilerseniz \u015fimdi LocalizationMessageHandler<\/strong> isminde bir handler olu\u015ftural\u0131m:<\/p>\n Kod blo\u011funda g\u00f6rd\u00fc\u011f\u00fcm\u00fcz gibi SendAsync method\u2019unu override edip, i\u00e7erisinden private olarak olu\u015fturmu\u015f oldu\u011fumuz SetCulture<\/strong> method\u2019unu \u00e7a\u011f\u0131r\u0131yoruz ve tekrardan base\u2019deki SendAsync<\/strong> method\u2019unu \u00e7a\u011f\u0131rarak request\u2019i inner handler\u2019a aktar\u0131yoruz . SetCulture method\u2019u i\u00e7erisinde ise request\u2019in headers k\u0131sm\u0131nda g\u00f6nderilen Accept Language<\/strong> listesi \u00fczerinde bir iterate i\u015flemi yaparak, s\u0131ras\u0131yla gelen dil bilgisini private olarak yukar\u0131da tan\u0131mlam\u0131\u015f oldu\u011fumuz \u201c<\/strong>supportedLanguages\u201d listesi \u00fczerinden kontrol ederek, e\u011fer gelen dil bilgisi \u201csupportedLanguages\u201d listesi i\u00e7erisinde var ise, culture bilgisini bu dil bilgisine g\u00f6re g\u00fcncelliyoruz ve iterate i\u015flemine son veriyoruz.<\/p>\n Bir \u00f6nceki b\u00f6l\u00fcm olan \u201cAccept-Language Header\u2019\u0131 Anlamak\u201d k\u0131sm\u0131nda bahsetti\u011fimiz gibi client birden fazla dil bilgisi parametresi g\u00f6nderebilmekteydi. Burada yapm\u0131\u015f oldu\u011fumuz i\u015flem ise, client\u2019\u0131n istedi\u011fi ilk dil bilgisine g\u00f6re geriye response d\u00f6nebilmektir.<\/p>\n \u015eimdi olu\u015fturmu\u015f oldu\u011fumuz LocalizationMessageHandler\u2019\u0131n pipeline i\u00e7erisinde devreye girebilmesi i\u00e7in WebApiConfig i\u00e7erisinde MessageHandlers listesine eklememiz gerekmektedir.<\/p>\n LocalizationMessageHandler\u2019\u0131 pipeline\u2019a register ettikten sonra, \u00f6rne\u011fimizi deneyebilmek i\u00e7in CustomerController\u2019\u0131 a\u015fa\u011f\u0131daki gibi olu\u015ftural\u0131m:<\/p>\n Controller\u2019\u0131da haz\u0131rlad\u0131k ve \u015fimdi Fiddler \u00fczerinden test i\u015flemine ba\u015flayabiliriz. Fiddler \u00fczerinden g\u00f6nderece\u011fimiz Accept-Language header bilgisine g\u00f6re controller \u00fczerinden Customer objesinin Name ve Email alanlar\u0131n\u0131n istenilen dil baz\u0131nda resource \u00fczerinden gelmesini beklemekteyiz.<\/p>\n Fiddler \u00fczerinden API\u2019nin Get<\/strong> method\u2019unu Accept-Language<\/strong> header bilgisini \u201ctr-TR\u201d \u015feklinde girerek a\u015fa\u011f\u0131daki gibi \u00e7a\u011f\u0131raca\u011f\u0131z:<\/p>\n API\u2019nin Get method\u2019unu Fiddler \u00fczerinden execute etmeden \u00f6nce LocalizationMessageHandler\u2019\u0131n SetCulture method\u2019una breakpoint koyup sonras\u0131nda ise execute etti\u011fimizde hen\u00fcz request, controller\u2019a iletmeden \u00f6nce LocalizationMessageHandler\u2019\u0131n SetCulture method\u2019unun devreye girdi\u011fini ve AcceptLanguage<\/strong> property\u2019sininde \u201ctr-TR<\/strong>\u201d olarak set edildi\u011fini a\u015fa\u011f\u0131daki ekranda g\u00f6rebiliriz.<\/p>\nnamespace WebAPILocalization.Models\r\n{\r\n public class Customer\r\n {\r\n public string Name { get; set; }\r\n public string Email { get; set; }\r\n }\r\n}\r\n<\/pre>\n![\"webapiresource\"](\"\/wp-content\/uploads\/2015\/11\/webapiresource.jpg\")
<\/a><\/p>\n<\/a><\/p>\n<\/a><\/p>\nusing System.Collections.Generic;\r\nusing System.Net.Http;\r\nusing System.Globalization;\r\nusing System.Threading;\r\nusing System.Threading.Tasks;\r\n\r\nnamespace WebAPILocalization.Handlers\r\n{\r\n public class LocalizationMessageHandler : DelegatingHandler\r\n {\r\n private readonly List<string> _supportedLanguages = new List<string>() { \"tr-TR\", \"en-US\" };\r\n\r\n protected override async Task<HttpResponseMessage> SendAsync(\r\n HttpRequestMessage request, CancellationToken cancellationToken)\r\n {\r\n SetCulture(request);\r\n\r\n var response = await base.SendAsync(request, cancellationToken);\r\n return response;\r\n }\r\n\r\n #region Private Methods\r\n private void SetCulture(HttpRequestMessage request)\r\n {\r\n foreach (var loopLanguage in request.Headers.AcceptLanguage)\r\n {\r\n \/\/ Destekledi\u011fimiz dillerden biri var ise culture bilgisini o dile g\u00f6re g\u00fcncelliyoruz.\r\n if (_supportedLanguages.Contains(loopLanguage.Value))\r\n {\r\n Thread.CurrentThread.CurrentCulture = new CultureInfo(loopLanguage.Value);\r\n Thread.CurrentThread.CurrentUICulture = new CultureInfo(loopLanguage.Value);\r\n\r\n break;\r\n }\r\n }\r\n }\r\n #endregion\r\n }\r\n}\r\n<\/pre>\npublic static class WebApiConfig\r\n{\r\n public static void Register(HttpConfiguration config)\r\n {\r\n config.MessageHandlers.Add(new LocalizationMessageHandler());\r\n }\r\n}\r\n<\/pre>\npublic class CustomerController : ApiController\r\n{\r\n public Customer Get()\r\n {\r\n return new Customer()\r\n {\r\n Name = Resources.WebAPIResource.NameField,\r\n Email = Resources.WebAPIResource.EmailField\r\n };\r\n }\r\n}\r\n<\/pre>\n<\/a><\/p>\n