ApiController返回504 - 服务器未返回此请求的完整响应。服务器返回0个字节

时间:2016-08-02 10:48:26

标签: c# asp.net-apicontroller

我打电话给我的ApiController,它返回了504,我无法弄清楚我做错了什么......

有人能看到我的问题吗?

这是控制器:

public class SA_GetAllLocationsController : ApiController
{
    [Route("SA_GetAllLocations")]
    [HttpGet]
    public List<SA_Locations> Get()
    {
        List<SA_Locations> result = SADatastore.Functions.Location.GetAllLocations(Settings.Default.ConnectionString);

        return result;
    }
}

这是由实体框架数据库优先生成的类SA_Locations ...

public partial class SA_Locations
{
    public SA_Locations()
    {
        this.SA_Items = new HashSet<SA_Items>();
    }

    public string LocationID { get; set; }
    public string BuildingID { get; set; }
    public string Name { get; set; }
    public string Description { get; set; }
    public string MISID { get; set; }
    public string GPSCoords { get; set; }
    public string QRCode { get; set; }
    public Nullable<bool> Signable { get; set; }
    public Nullable<bool> Auditable { get; set; }
    public Nullable<bool> Bookable { get; set; }
    public Nullable<bool> Entrance { get; set; }
    public Nullable<bool> Exit { get; set; }
    public Nullable<bool> Active { get; set; }
    public System.DateTime LastUpdated { get; set; }

    public virtual SA_Buildings SA_Buildings { get; set; }
    public virtual ICollection<SA_Items> SA_Items { get; set; }
}

我写了一个很小的状态&#34;功能完美,看起来像这样:

public HttpResponseMessage Get()
    {
        return new HttpResponseMessage()
        {
            Content = new StringContent(
                "SA service is running and ready to accept connections!",
                Encoding.UTF8,
                "text/html"
            )
        };
    }

我无法弄清楚为什么在调试时SA_Locations似乎没有错误返回,但我在Fiddler中看到的响应是:

  

504 - 服务器未返回此请求的完整响应。服务器返回0字节

对象是否太复杂而无法返回?

非常感谢任何帮助!

崔佛

更新

我决定尝试看看如果我从控制器返回纯JSON会发生什么,所以我按如下方式重新编写控制器:

public class SA_GetAllLocationsController : ApiController
{
    [Route("SA_GetAllLocations")]
    [HttpGet]
    public HttpResponseMessage Get()
    {
        List<SA_Locations> result = SADatastore.Functions.Location.GetAllLocations(Settings.Default.ConnectionString);

        string output = JsonConvert.SerializeObject(result);

        return new HttpResponseMessage()
        {
            Content = new StringContent(
                output,
                Encoding.UTF8,
                "application/json"
            )
        };
    }
}

现在实际上抛出了将SA_Locations对象序列化为字符串的错误!

错误消息是:

  

类型&#39; Newtonsoft.Json.JsonSerializationException&#39;的例外情况发生在Newtonsoft.Json.dll但未在用户代码中处理

     

其他信息:从SA_Buildings&#39;中获取价值时出错on&#39; System.Data.Entity.DynamicProxies.SA_Locations_720FF8784B152496318F87BCB674E344B97C0446B16D4DC2BDDC381D88C048B9&#39;。

所以,它确实指向了与SA_Locations有关的东西,正如我所说,它是由实体框架数据库首先生成的类....

越来越近但不知道为什么该对象不会序列化?

1 个答案:

答案 0 :(得分:0)

这一切都归结为Configuration.ProxyCreationEnabled = false;

https://stackoverflow.com/a/12869077/1153795

HTH