如何使用 IHttpActionResult 设置标头

我想将令牌添加到 webapi 请求的标头中。 我怎样才能做到这一点 ？

这是我的示例代码

public IHttpActionResult Authenticate(Login data)
            {
                var Token = "fdsf123546fskjhf-gsuyuhsh";

                //here add these token to header

                return ?
            }

谢谢。

1. 你可以使用响应消息结果 https://msdn.microsoft.com/en-us/library/system.web.http.results.responsemessageresult(v=vs.118).aspx为此类：

   public IHttpActionResult Authenticate(Login data)
   {
       var Token = "fdsf123546fskjhf-gsuyuhsh";
   
       var response = new HttpResponseMessage();
   
       response.Headers.Add("Authentication", Token);
   
       return new ResponseMessageResult(response);
   }
   

2. 或者创建您自己的结果类：

   public class HeaderActionResult : IHttpActionResult
   {
       private Tuple<string, string> header;
   
       public HeaderActionResult(Tuple<string, string> header) 
       {
           this.header = header;
       }
   
       public Task<HttpResponseMessage> ExecuteAsync(CancellationToken cancellationToken) 
       {
           var response = new HttpResponseMessage();
   
           response.Headers.Add(header.Item1, header.Item2);
   
           return Task.FromResult<HttpResponseMessage>(response);
       }
   }
   
   public IHttpActionResult Authenticate(Login data)
   {
       var Token = "fdsf123546fskjhf-gsuyuhsh";
   
       return new HeaderActionResult(Tuple.Create("Authentication", Token));
   }
   

3. 或者使用扩展方法向任何现有 IHttpActionResult 对象添加标头：

   public static class HttpActionResultExtensions
   {
       public static IHttpActionResult AddHeader(this IHttpActionResult actionResult, string name, string value)
       {
           return new HeaderActionResult(actionResult, name, value);
       }
   
       private class HeaderActionResult : IHttpActionResult
       {
           private readonly IHttpActionResult actionResult;
   
           private string name;
   
           private string value;
   
           public HeaderActionResult(IHttpActionResult actionResult, string name, string value)
           {
               this.actionResult = actionResult;
   
               this.name = name;
   
               this.value = value;
           }
   
           public async Task<HttpResponseMessage> ExecuteAsync(CancellationToken cancellationToken)
           {
               HttpResponseMessage httpResponseMessage = await this.actionResult.ExecuteAsync(cancellationToken);
   
               httpResponseMessage.Headers.Add(this.name, this.value);
   
               return httpResponseMessage;
           }
       }
   }