c# - 如何减少尝试执行请求的时间？

Question

我正在使用 gmail api 并尝试获取消息数。如果 Internet 连接出现问题 Execute() 尝试执行超过 1 分钟。我想在 5 秒无响应后跳过执行，不再等待。

var getEmailsRequest = new UsersResource.MessagesResource.ListRequest(service, userId);
try
{
    messagesCount = getEmailsRequest.Execute().Messages.Count;
}
catch (TaskCanceledException ex)
{
    //after more than minute of waiting with no connection I can catch this exception
}

Answer 1

免责声明:我对相关图书馆一无所知；-)

---

如果您使用 googleapis/google-api-dotnet-client :

然后你应该能够用 this 配置超时:

/// <summary> 
/// HTTP client initializer for changing the default behavior of HTTP client. 
/// Use this initializer to change default values like timeout and number of tries. 
/// You can also set different handlers and interceptors like 
/// <see cref="IHttpUnsuccessfulResponseHandler"/>s, 
/// <see cref="IHttpExceptionHandler"/>s and <see cref="IHttpExecuteInterceptor"/>s.
/// </summary>
public interface IConfigurableHttpClientInitializer
{
    /// <summary>Initializes a HTTP client after it was created.</summary>
    void Initialize(ConfigurableHttpClient httpClient);
}

---

作为替代方案，您可以将 ExecuteAsync 与取消 token 一起使用，例如:

CancellationTokenSource source = 
             new CancellationTokenSource(TimeSpan.FromMilliseconds(5000));

var someResult = await getEmailsRequest.ExecuteAsync(source.Token);
messagesCount = someResult.Messages.Count;

请注意，要使其正常工作，您需要一个 async Task 作为方法签名。