ASP.NET Core HTTPRequestMessage返回奇怪的JSON消息 [英] ASP.NET Core HTTPRequestMessage returns strange JSON message

问题描述

我目前正在使用ASP.NET Core RC2，但遇到了一些奇怪的结果。
所以我有一个具有以下功能的MVC控制器：

I am currently working with ASP.NET Core RC2 and I am running into some strange results. So I have an MVC controller with the following function:

public HttpResponseMessage Tunnel() {
    var message = new HttpResponseMessage(HttpStatusCode.OK);
    message.Content = new StringContent("blablabla", Encoding.UTF8);
    message.Content.Headers.ContentType = new System.Net.Http.Headers.MediaTypeHeaderValue("text/plain");
    message.Headers.CacheControl = new System.Net.Http.Headers.CacheControlHeaderValue {
        NoCache = true
    };

    return message;
}

如果我使用邮递员将此邮件（将Accept标头设置为纯文本）进行调用此响应：

If I call this with postman with an Accept header set to text plain I get this response:

{
  "Version": {
    "Major": 1,
    "Minor": 1,
    "Build": -1,
    "Revision": -1,
    "MajorRevision": -1,
    "MinorRevision": -1
  },
  "Content": {
    "Headers": [
      {
        "Key": "Content-Type",
        "Value": [
          "text/plain"
        ]
      }
    ]
  },
  "StatusCode": 200,
  "ReasonPhrase": "OK",
  "Headers": [
    {
      "Key": "Cache-Control",
      "Value": [
        "no-cache"
      ]
    }
  ],
  "RequestMessage": null,
  "IsSuccessStatusCode": true
}

我真的不明白这是如何生成对上述控制器的响应。它基本上是整个消息本身的JSON序列化，并且绝不包含我要发送的 blablabla。

I really do not understand how this is the generated reponse to the above controller. It is basically a JSON serialization of the entire message itself and does in no way contain the "blablabla" I intended to send.

我获得所需结果的唯一方法是通过使我的控制器函数返回 string 而不是 HttpResponse ，但是我无法设置<$这样的标头c $ c> CacheControl

The only way I have gotten the desired result is by making my controller function return string instead of HttpResponse, but that way I am unable to set headers like CacheControl

所以我的问题是：为什么会得到这个奇怪的响应？对我来说，这似乎是非常奇怪的行为

So my question is: why do I get this strange response? It seems like very weird behaviour to me

推荐答案

根据本文，ASP.NET Core MVC不支持 HttpResponseMessage -默认情况下是返回方法。

According to this article, ASP.NET Core MVC does not support HttpResponseMessage-returning methods by default.

如果要继续使用它，可以使用WebApiCompatShim：

If you want to keep using it, you can, by using WebApiCompatShim:

1. 将对 Microsoft.AspNetCore.Mvc.WebApiCompatShim 的引用添加到项目中。 / li>
   
2. 在 ConfigureServices（）中进行配置： services.AddMvc（）。AddWebApiConventions（）;



3. 在 Configure（）中为其设置路由：

1. Add reference to Microsoft.AspNetCore.Mvc.WebApiCompatShim to your project.
2. Configure it in ConfigureServices(): services.AddMvc().AddWebApiConventions();

3. Set up route for it in Configure():

app.UseMvc(routes =>
{
    routes.MapWebApiRoute(
        name: "default",
        template: "{controller=Home}/{action=Index}/{id?}");
});

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