c# - 如何从 Web.Api Controller 方法发送 cookie

Question

我有一个 Web.Api 服务，它有一个接受自定义类并返回另一个自定义类的方法:

public class TestController : ApiController
{
    public CustomResponse Post([FromBody]CustomRequest request)
    {
        // process request
        ...
        // create response
        CustomResponse resp = new CustomResponse() { ... };
        return resp;
    }
}

现在我还想发回一个 cookie 作为 Http 响应的一部分。我该怎么做？

Answer 1

我设法通过结合来自几个不同位置的信息来做到这一点。首先，为了能够轻松地在响应中发送 cookie，Web.Api Controller 应该返回一个 System.Net.Http.HttpResponseMessage 的实例。类(link):

public class TestController : ApiController
{
    public HttpResponseMessage Post([FromBody]CustomRequest request)
    {
        var resp = new HttpResponseMessage();
        ...

        //create and set cookie in response
        var cookie = new CookieHeaderValue("customCookie", "cookieVal");
        cookie.Expires = DateTimeOffset.Now.AddDays(1);
        cookie.Domain = Request.RequestUri.Host;
        cookie.Path = "/";
        resp.Headers.AddCookies(new CookieHeaderValue[] { cookie });

        return resp;
    }
}

但是我如何确保我也可以轻松地发回 CustomResponse ？

诀窍在于 answer对此question .使用 Request.CreateResponse<T>请求对象上的方法。整个交易就变成了:

public class TestController : ApiController
{
    public HttpResponseMessage Post([FromBody]CustomRequest request)
    {
        // process request
        ...

        var resp = Request.CreateResponse<CustomResponse>(
            HttpStatusCode.OK,
            new CustomResponse() { ... }
        );

        //create and set cookie in response
        var cookie = new CookieHeaderValue("customCookie", "cookieVal");
        cookie.Expires = DateTimeOffset.Now.AddDays(1);
        cookie.Domain = Request.RequestUri.Host;
        cookie.Path = "/";
        resp.Headers.AddCookies(new CookieHeaderValue[] { cookie });

        return resp;
    }
}