在ASP.NET 5中，HTTP标头的所有类型都在哪里? [英] Where all types for http headers gone in ASP.NET 5?

问题描述

以前，在WebApi(在.NET 4.x上)中，我们可以通过类型化的接口使用请求和响应的标头(请参见HttpRequestMessage.Headers/HttpResponseMessage.Headers). 现在，在ASP.NET 5中，我们具有HttpRequest和HttpResponse，其Headers属性的类型为IHeaderDictionary.但这只是一个无类型的字典.

Previously, in WebApi (on .NET 4.x) we could work with headers of both the request and the response via typed interfaces (see HttpRequestMessage.Headers/HttpResponseMessage.Headers). Now, in ASP.NET 5 we have HttpRequest and HttpResponse with Headers property of type IHeaderDictionary. But it's just an untyped Dictionary.

下面，我举一个带有类型化访问的示例，它可以返回经过微调的http响应.需要创建一个HttpResponseMessage并填充其Headers集合(键入btw).

Below I put an example with typed accessing could return a fine-tuned http-response. It's needed to create a HttpResponseMessage and fill its Headers collection (which was typed btw).

HttpResponseMessage response = Request.CreateResponse(HttpStatusCode.OK);
response.Content = new StringContent(manifestContent);
response.Content.Headers.ContentType = new MediaTypeHeaderValue("text/cache-manifest");
response.Headers.CacheControl = new CacheControlHeaderValue {NoCache = true, Public = true};
response.Headers.ETag = new EntityTagHeaderValue("\"" + etag + "\"");

推荐答案

如果为Microsoft.AspNetCore.Http添加using语句，则HttpRequest和HttpResponse到GetTypedHeaders上都有扩展方法，应该可以给您您想要的类型安全性.

If you add the using statement for Microsoft.AspNetCore.Http, there are extension methods on the HttpRequest and HttpResponse to GetTypedHeaders, which should give you the type safety that you want.

在示例中，我还为Microsoft.Net.Http.Headers添加了using语句，只是为了清理它.

In the example, I also added the using statement for Microsoft.Net.Http.Headers, just to clean it up.

var headers = Response.GetTypedHeaders();
headers.ContentType = new MediaTypeHeaderValue("text/cache-manifest");
headers.CacheControl = new CacheControlHeaderValue { NoCache = true, Public = true };
headers.ETag = new EntityTagHeaderValue("\"" + etag + "\"");

来源: aspnet/HttpAbstractions on GitHub

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