我需要爲本地化數據提供服務。本地化的所有響應Dtos都共享相同的屬性。即我定義了一個接口(ILocalizedDto
)來標記這些Dtos。在請求方面,需要本地化的請求有ILocalizedRequest
。如何編寫需要請求和響應的ServiceStack插件Dtos
使用IPlugin
我已經設法實現了所需的功能。但是我確定實現不是線程安全的,另外我不知道我是否可以使用IHttpRequest.GetHashCode()作爲一個請求/響應循環的標識符。
實現一個ServiceStack插件的正確方法是什麼?它使用請求和響應Dto?即是否有一些IHttpRequest.Context存儲數據或可以在響應時間獲取請求dto?
internal class LocalizationFeature : IPlugin
{
public static bool Enabled { private set; get; }
/// <summary>
/// Activate the localization mechanism, so every response Dto which is a <see cref="ILocalizedDto" />
/// will be translated.
/// </summary>
/// <param name="appHost">The app host</param>
public void Register(IAppHost appHost)
{
if (Enabled)
{
return;
}
Enabled = true;
var filter = new LocalizationFilter();
appHost.RequestFilters.Add(filter.RequestFilter);
appHost.ResponseFilters.Add(filter.ResponseFilter);
}
}
// My request/response filter
public class LocalizationFilter
{
private readonly Dictionary<int,ILocalizedRequest> localizedRequests = new Dictionary<int, ILocalizedRequest>();
public ILocalizer Localizer { get; set; }
public void RequestFilter(IHttpRequest req, IHttpResponse res, object requestDto)
{
var localizedRequest = requestDto as ILocalizedRequest;
if (localizedRequest != null)
{
localizedRequests.Add(GetRequestId(req), localizedRequest);
}
}
public void ResponseFilter(IHttpRequest req, IHttpResponse res, object response)
{
var requestId = GetRequestId(req);
if (!(response is ILocalizedDto) || !localizedRequests.ContainsKey(requestId))
{
return;
}
var localizedDto = response as ILocalizedDto;
var localizedRequest = localizedRequests[requestId];
localizedRequests.Remove(requestId);
Localizer.Translate(localizedDto, localizedRequest.Language);
}
private static int GetRequestId(IHttpRequest req)
{
return req.GetHashCode();
}
}
看來你對IHttpRequest /響應的問題將被執行特定的。假設實現是ASP.NET,通常可以將東西存儲在HttpContext.Items集合中。不幸的是,IHttpContext似乎沒有公開它...... http://msdn.microsoft.com/en-us/library/ms689291%28v=vs.90%29.aspx – 2013-05-21 22:24:57