Question

最近我开始使用AWS C ++ SDK取得了一些成功。那些基于HTTPS GET的调用工作正常。对于IoT REST API，我可以创建Things和ListThings。

但是当我调用UpdateThing请求时，调用会挂起，并且在超时时我收到AWS 504网关超时错误。

我尝试过很多东西，但无济于事。似乎很少有已发布的示例可以帮助我解决问题。

AWS DEBUG日志输出位于：

[DEBUG] 2017-01-03 22:08:42 AWSClient [0x7fff755d1000] Request Successfully signed
[DEBUG] 2017-01-03 22:08:42 CurlHandleContainer [0x7fff755d1000] Attempting to acquire curl connection.
[DEBUG] 2017-01-03 22:08:42 CurlHandleContainer [0x7fff755d1000] No current connections available in pool. Attempting to create new connections.
[DEBUG] 2017-01-03 22:08:42 CurlHandleContainer [0x7fff755d1000] attempting to grow pool size by 2
[INFO] 2017-01-03 22:08:42 CurlHandleContainer [0x7fff755d1000] Pool successfully grown by 2
[INFO] 2017-01-03 22:08:42 CurlHandleContainer [0x7fff755d1000] Connection has been released. Continuing.
[DEBUG] 2017-01-03 22:08:42 CurlHandleContainer [0x7fff755d1000] Returning connection handle 0x7f90bc00da00
[DEBUG] 2017-01-03 22:08:42 CurlHttpClient [0x7fff755d1000] Obtained connection handle 0x7f90bc00da00
[DEBUG] 2017-01-03 22:09:42 CurlHttpClient [0x7fff755d1000] Returned http response code 504
[DEBUG] 2017-01-03 22:09:42 CurlHttpClient [0x7fff755d1000] Releasing curl handle 0x7f90bc00da00
[DEBUG] 2017-01-03 22:09:42 CurlHandleContainer [0x7fff755d1000] Releasing curl handle 0x7f90bc00da00
[DEBUG] 2017-01-03 22:09:42 CurlHandleContainer [0x7fff755d1000] Notified waiting threads.
[DEBUG] 2017-01-03 22:09:42 AWSClient [0x7fff755d1000] Request returned error. Attempting to generate appropriate error codes from response
[ERROR] 2017-01-03 22:09:42 AWSClient [0x7fff755d1000] No response body.  Response code: 504

代码是：

Aws::IoT::Model::UpdateThingRequest request;
Aws::IoT::Model::AttributePayload payload;

payload.AddAttributes("manufacturer",manufacturer);
payload.AddAttributes("product",product);
payload.AddAttributes("type",type);
payload.SetMerge(true);

request
     .WithThingName(name)
     .WithAttributePayload(payload);

auto outcome = _client->UpdateThing(request);

if (outcome.IsSuccess()) {
    log.info("Sucess");
} else {
    log.info("Error: %s: %s",outcome.GetError().GetExceptionName().c_str(),
            outcome.GetError().GetMessage().c_str());
}

Answer 1

我的问题似乎是curl Mac OS X库（7.52.1）处理PATCH请求的方式。默认情况下，它不调用已注册的数据函数（通过CURLOPT_READFUNCTION注册）。

我通过修补CurlHttpClient.cpp文件为PATCH请求添加CURLOPT_POST选项解决了这个问题。

https://github.com/aws/aws-sdk-cpp/pull/401

使用AWS C ++ SDK时，调用UpdateThing将返回504 Gateway Timeout

1 个答案: