向 Web API 中的所有响应添加自定义标头 [英] Add custom header to all responses in Web API

问题描述

简单的问题，我相信它有一个简单的答案，但我找不到.

Simple question, and I am sure it has a simple answer but I can't find it.

我正在使用 WebAPI，我想将自定义标头发送回所有响应(开发人员出于同步目的而请求的服务器日期/时间).

I am using WebAPI and I would like to send back a custom header to all responses (server date/time requested by a dev for syncing purposes).

我目前正在努力寻找一个清晰的例子，说明如何在一个地方(通过 global.asax 或另一个中心位置)我可以为所有响应显示一个自定义标题.

I am currently struggling to find a clear example of how, in one place (via the global.asax or another central location) I can get a custom header to appear for all responses.

答案已接受，这是我的过滤器(几乎相同)和我添加到 WebApi 配置的注册功能的行.

Answer accepted, here is my filter (pretty much the same) and the line i added to the Register function of the WebApi config.

注意:DateTime 的东西是 NodaTime，没有真正的理由只是对它感兴趣.

    public override void OnActionExecuted(HttpActionExecutedContext actionExecutedContext)
    {
        actionExecutedContext.Response.Content.Headers.Add("ServerTime", Instant.FromDateTimeUtc(DateTime.Now.ToUniversalTime()).ToString());
    }

配置行:

config.Filters.Add(new ServerTimeHeaderFilter());

推荐答案

为此，您可以使用自定义 ActionFilter (System.Web.Http.Filters)

For that you can use a custom ActionFilter (System.Web.Http.Filters)

public class AddCustomHeaderFilter : ActionFilterAttribute
{
    public override void OnActionExecuted(HttpActionExecutedContext actionExecutedContext)
    {
       actionExecutedContext.Response.Headers.Add("customHeader", "custom value date time");
    }
}

然后，您可以通过在 Global.asax 的配置中添加此过滤器来将过滤器应用于所有控制器的操作，例如:

You can then apply the filter to all your controller's actions by adding this in the configuration in Global.asax for example :

GlobalConfiguration.Configuration.Filters.Add(new AddCustomHeaderFilter());

您也可以将过滤器属性应用于您想要的操作，而无需全局配置行.

You can also apply the filter attribute to the action that you want without the global cofiguration line.

这篇关于向 Web API 中的所有响应添加自定义标头的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！