c# - 如何从 Azure 函数返回 AcceptedAtRouteResult？

Question

从 Azure 函数返回 AcceptedAtRouteResult 时，我不断收到未处理主机错误。

我希望能够从 Azure 函数返回 AcceptedAtRouteResult 来告诉调用者任何省略的查询字符串参数的默认值，但我不断收到未处理的主机错误。

我的目标是 .net Standard 2.0.3 并使用 Microsoft.NET.Sdk.Functions 1.0.26

[FunctionName("AcceptedAtRouteResult")]
public static IActionResult AcceptedAtRouteResult(
    [HttpTrigger("GET")]HttpRequest req)
{
    // read query parameter if present else set to defualt value

   var rs = new AcceptedAtRouteResult(
        "acceptedatrouteresult", 
        new { someParameter = "value" }, 
        new { Result = "1" });

    return rs;
}

我不断遇到异常:

An unhandled host error has occurred. System.Private.CoreLib: Index was out of range. Must be non-negative and less than the size of the collection. Parameter name: index.

Answer 1

产品团队建议使用以下类来替换 AcceptedAtRouteResult 返回类型，直到错误得到纠正:

class AcceptedObjectResult : ObjectResult
{
    private readonly string _location;

    public AcceptedObjectResult(string location, object value) : base(value)
    {
        _location = location;
    }

    public override Task ExecuteResultAsync(ActionContext context)
    {
        context.HttpContext.Response.StatusCode = 202;
        var uri = new UriBuilder(context.HttpContext.Request.Scheme, context.HttpContext.Request.Host.Host)
        {
            Path = $@"api/{_location}",
        };
        if (context.HttpContext.Request.Host.Port.HasValue)
        {
            uri.Port = context.HttpContext.Request.Host.Port.Value;
        }

        context.HttpContext.Response.Headers.Add(@"Location", uri.ToString());

        return base.ExecuteResultAsync(context);
    }
}

可以在 Github 上跟踪错误单:https://github.com/Azure/azure-functions-host/issues/4267