Question

最初我想发送没有客户端证书的第一个请求，如果错误是“身份验证错误”，那么我想重新发送附带证书的请求。所以代码首先是

HttpStringContent ehttpContent = new HttpStringContent(content);
HttpRequestMessage req2 = new HttpRequestMessage(method, resourceUri);
req2.Headers.Add("SOAPAction", soapAction);
req2.Content = ehttpContent;
req2.Content.Headers.ContentType = HttpMediaTypeHeaderValue.Parse("text/xml; charset=utf-8");

bool retry= await FirstLoginAttempt(...);

if( retry) {

 newHttpClient = new HttpClient(baseFilter2);

 try
 {
     cts.CancelAfter(Constants.HttpTimeOut);
     System.Diagnostics.Debug.WriteLine(ehttpContent);
     eresponse = await newHttpClient.SendRequestAsync(req2).AsTask(cts.Token);

     if (cts != null)
     {
        cts.Dispose();
        cts = null;
 } catch { ... }


}

之前的代码调用FirstLoginAttempt，它可能会因证书错误而失败。它返回true或false，然后前面的代码尝试发送带有证书的新httpClient。

public static async Task<bool> FirstLoginAttempt() {

httpClient = new HttpClient();

try
{
    cts.CancelAfter(Constants.HttpTimeOut);
    var operation = httpClient.SendRequestAsync(ereq).AsTask(cts.Token);
    eresponse = await operation;
    if (cts != null) { cts.Dispose(); cts = null; }

}
catch (TaskCanceledException e)
{
  if (cts != null) { cts.Dispose(); cts = null; }
   throw e;
}
catch (Exception exx)
{ ... }
}

当第一次登录尝试返回true以便再次尝试时，第二个httpclient（具有相同的contect）失败，并且异常表示我无法两次发送相同的请求。那可能意味着以前的操作没有完成？我该如何解决我的问题？我可以以某种方式确保第一个请求生命周期结束以便重试吗？

我的环境是Windows Phone 8.1

更新＃1。使用lambda后

StackTrace =“在System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess（任务任务）\ r \ n at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification（任务任务）\ r \ n在System.Runtime.CompilerServices.TaskAwaiter`1.GetResult（）\ r \ n ... 消息=“来自HRESULT的异常：0x80072EFD”（抛出不成功）

堆栈跟踪上方的

... ...

 Func<HttpRequestMessage> httpRequestCreator = () =>
                {
     HttpStringContent ehttpContent = new HttpStringContent(content);

     var req = new HttpRequestMessage(method, resourceUri)
     {
         Content = ehttpContent
     };
     req.Headers.Add("SOAPAction", soapAction);
     req.Content.Headers.ContentType = HttpMediaTypeHeaderValue.Parse("text/xml; charset=utf-8");
     return req;
};

if (cts != null) { cts.Dispose(); cts = null; }

cts = new System.Threading.CancellationTokenSource();
newHttpClient = new HttpClient();

try
{
    cts.CancelAfter(Constants.HttpTimeOut);
    eresponse = await newHttpClient.SendRequestAsync(httpRequestCreator()).AsTask(cts.Token);

    if (cts != null) { cts.Dispose(); cts = null; }

}
catch (TaskCanceledException e
{
    if (cts != null) { cts.Dispose(); cts = null; }
    throw e;
}
catch (Exception exx)
{
    exception2 = exx;
    ...
    ...
}

重试后，HttpClient无法发送第二个请求

0 个答案: