c# - Azure函数返回已弃用的API header

Question

我有一个位于代理后面的 Azure 函数。如果返回的对象发生更新，我们希望在一段时间后弃用该函数。我正在尝试使用提供的 in this solution. 来创建包含 HTTP header 中的预期内容的响应

Warning: 299 - "Deprecated API"

我尝试像这样附加 Azure 函数:

 [FunctionName("MyAPI")]
    public static async Task<HttpResponseMessage> Run([HttpTrigger(AuthorizationLevel.Function,
        "post", Route = null)]
        HttpRequestMessage req,
        TraceWriter log)
    {            
        object response = await someService.Get();
        if (settingsService.IsDeprecated)
        {
            var httpresponse = req.CreateResponse(HttpStatusCode.OK, response, "application/json");
            httpresponse.Content.Headers.Add("Warning", "299 - Deprecated API");
            return httpresponse;
        }
        return req.CreateResponse(HttpStatusCode.OK, response, "application/json");
    }

我收到异常

Exception while executing function: MyAPI -> Misused header name. Make sure request headers are used with HttpRequestMessage, response headers with HttpResponseMessage, and content headers with HttpContent objects.

如何附加 "Deprecated" status warning在我的 API Http 响应中？

Answer 1

将线路更改为

httpresponse.Headers.Add("Warning", "299 - \"Deprecated API\"");

引号对于遵守格式要求似乎很重要。