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我目前正在尝试将Google Indexing API客户的服务与他们的ASP.NET Web API项目（.NET Framework 4.5.2）集成。我创建了一个控制器，它接受一个 URL 作为输入，然后调用一个自定义服务来尝试将此 URL 发送到Google Indexing API. 控制器逻辑如下：

namespace GoogleServiceAPI.Controllers
{
    public class GoogleController : ApiController
    {
        private GoogleIndexService googleIndexService;

        public GoogleController()
        {
            googleIndexService = new GoogleIndexService();
        }

        [OverrideAuthentication]
        [OverrideAuthorization]
        [Route("SendUrlToGoogle")]
        [HttpPost]
        public HttpResponseMessage SendUrlToGoogle(string url)
        {
            try
            {
                var response = PostUrlToGoogle(url, GoogleIndexAction.URL_UPDATED).GetAwaiter().GetResult();
                var message = response.Content.ReadAsStringAsync().Result;
                
                return Request.CreateResponse(HttpStatusCode.OK, message);
            }
            catch (Exception ex)
            {
                return Request.CreateResponse(HttpStatusCode.InternalServerError, ex.Message);                
            }
        }

        private async Task<HttpResponseMessage> PostUrlToGoogle(string url, GoogleIndexAction action)
        {
            var response = await googleIndexService.PostUrlToGoogle(url, action);

            return response;
        }
    }
}

自定义服务类代码如下：

namespace GoogleService.Services.Google
{
    public class GoogleIndexService : IGoogleIndexService
    {
        private GoogleCredential googleCredential;
        private readonly string googleAPIUrl;

        public GoogleIndexService()
        {         
            googleAPIUrl = "https://indexing.googleapis.com/v3/urlNotifications:publish";
        }

        private GoogleCredential GetGoogleCredential()
        {
            var path = @"C:\Json\olasjobs-org-indexingapi-7b3cf0fa1e20.json";
            GoogleCredential credential;

            using (var stream = new FileStream(path, FileMode.Open, FileAccess.Read))
            {
                credential = GoogleCredential.FromStream(stream).CreateScoped(new[] { "https://www.googleapis.com/auth/indexing" });
            }

            return credential;
        }

        public async Task<HttpResponseMessage> PostUrlToGoogle(string Url, GoogleIndexAction action)
        {
            googleCredential = GetGoogleCredential();

            var serviceAccountCredential = (ServiceAccountCredential)googleCredential.UnderlyingCredential;

            var gAction = action.ToString();            
            
            var requestBody = new
            {
                url = Url,
                type = gAction
            };

            var httpClientHandler = new HttpClientHandler();
            var cMessageHandler = new ConfigurableMessageHandler(httpClientHandler);
            var configurableHttpClient = new ConfigurableHttpClient(cMessageHandler);
            serviceAccountCredential.Initialize(configurableHttpClient);

            HttpContent content = new StringContent(JsonConvert.SerializeObject(requestBody), Encoding.UTF8, "application/json");
            var response = await configurableHttpClient.PostAsync(new Uri(googleAPIUrl), content);
            
            return response;
        }
    }
}

服务接口如下：

namespace GoogleService.Services.Google
{
    public interface IGoogleIndexService
    {
        Task<HttpResponseMessage> PostUrlToGoogle(string Url, GoogleIndexAction action);
    }

    public enum GoogleIndexAction
    {
        URL_UPDATED,
        URL_DELETED
    }
}

我正在测试ASP.NET Web API通过Postman，请求只是一直在旋转并且什么都不做。我也有一个console project我使用与上面相同的服务代码，当我运行它时，请求成功并且 URL 被注册到谷歌。但是我无法通过 Web API 项目获得相同的结果。没有错误，我只是在 Postman 中看到“发送响应”，之后什么也没有发生。我已经验证没有网络问题，因为通过控制台项目一切正常。我在 Web API 项目中做错了吗？有人可以帮帮我吗。我尝试使用硬编码的 URL 和操作值发送请求，但仍然无法正常工作。

谢谢

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