Question

我使用以下代码来发送大量HTTPRequests并且由于许多调用都不成功，我想检测它们并将它们保存在新列表中（UnsuccessfulURLsPhase1）并再次发送它们。

不幸的是，当HTTPRequest无法发送时，异常不会发生，我无法将url添加到新列表中。

任何提示都表示赞赏。

private static async Task CallURLAsync(string url)
{
    try
    {
        var content = new MemoryStream();
        var webReq = (HttpWebRequest)WebRequest.Create(url);

        using (WebResponse response = await webReq.GetResponseAsync())
        {
        }
    }
    catch ( Exception e )
    {
        UnsuccessfulURLsPhase1.Add(url);
        Console.WriteLine("\nException raised!");
        Console.WriteLine("\nMessage:{0}", e.Message);
    }
}

Answer 1

这是代码

        var content = new MemoryStream();
            var webReq = (HttpWebRequest)WebRequest.Create("http://google.com");

            using (WebResponse response = await webReq.GetResponseAsync())
            {
                HttpWebResponse res = (HttpWebResponse)response;
                if(res.StatusCode==HttpStatusCode.OK)
                {
                    //your code
                }

            }

检测HTTPRequest失败

1 个答案: