Question

我正在尝试使用HttpClient来访问第三方SOAP WS。

[HttpGet]
public IActionResult Login()
{
  HttpClientHandler httpClientHandler = new HttpClientHandler();
  httpClientHandler.ServerCertificateCustomValidationCallback = (message, cert, chain, errors) => { return true; };
  HttpClient client = new HttpClient(httpClientHandler);
  HttpRequestMessage request = new HttpRequestMessage(new HttpMethod("POST"), myUrl);
  request.Content = new StringContent(myXmlString, Encoding.UTF8, "text/xml");
  request.Headers.Add("SOAPAction",https://actionNameOfWs);
  HttpResponseMessage response = client.SendAsync(request).Result;
  if(response.StatusCode == HttpStatusCode.OK) return new OkResult();
  else return new ObjectResult(response.StatusCode);
}

此时所有内容都以TaskCanceledException: A task was canceled中断，这实际上不是取消任务，而是连接超时。我可以使用SOAP UI在https上发送相同的POST请求，因此连接到WS不是问题。我可以通过http发送POST请求，上面的代码就好了。但是，一旦我尝试上面的代码通过https发送POST，我就会遇到连接超时。那么，捕获的地方在哪里？

我的环境是：操作系统：Linux Mint 16.04 .Net核心：1.0.1

Answer 1

您可能正在混合异步和阻止呼叫。 .Result是一个阻塞调用，可能导致死锁，当与异步调用混合时可能导致超时。使调用操作始终保持异步。

[HttpGet]
public async Task<IActionResult> Login() {
    var httpClientHandler = new HttpClientHandler();
    httpClientHandler.ServerCertificateCustomValidationCallback = (message, cert, chain, errors) => { return true; };
    var client = new HttpClient(httpClientHandler);
    client.Timeout = TimeSpan.FromSeconds(90);
    var request = new HttpRequestMessage(HttpMethod.Post, myUrl);
    request.Content = new StringContent(myXmlString, Encoding.UTF8, "text/xml");
    request.Headers.Add("SOAPAction", https://actionNameOfWs);
    var response = await client.SendAsync(request);
    if(response.StatusCode == HttpStatusCode.OK) return Ok();
    else return StatusCode((int)response.StatusCode);
}

我还建议你检查发送的原始请求及其响应。

Asp.net核心，HttpClient用POST请求到达SOAP服务

1 个答案: