Qfyilyi

I have a simple javascript class which creates/deletes devices inside an Azure IoT Hub, using the azure-iothub Node.js module.

class AzureManager {

    constructor(options) {

      const { connectionString } = options;

      this.registry = iothub.Registry.fromConnectionString(connectionString);

    }



   /**

    * Gets some stats about the Iot Hub selected

    * @returns {Object} an object with the following properties:

    * totalDeviceCount, enabledDeviceCount, disabledDeviceCount

    */

   getStats() {

      return new Promise((resolve, reject) => {

          this.registry.getRegistryStatistics((err, stats, res) => {

              if (err) {

                  return reject(err);

              }



              return resolve(stats);

          });

      });

   }

}

I have developed a Jest test for this class and when I execute it, all tests pass without problems.
When I execute the code inside Chrome, I get the following error.

request.js:150 OPTIONS
https://pysensors.azure-devices.net/statistics/devices?api-version=2018-06-30
net::ERR_SPDY_INADEQUATE_TRANSPORT_SECURITY

I don't know if I have to configure something to make it works on all the recent versions of the browsers.
I've found this forum post (somehow similar to this blog post) which talks about a cipher suite problem on the server side and to force the client to use HTTP1/1, but since I'm using the SDK, I have no control on how the request is performed.
Thanks

EDIT: Just discovered that the module I'm using is intended to be used just server side. Using Firefox I don't have the SPDY issue, anyway I get CORS issues since the Azure doesn't support it. I've read somewhere that it's on their roadmap, but not a top priority.

Official Microsoft's response:

This happens to be a bug on IoTHub service side. IoTHub service does
not support HTTP/2 protocol yet but due to the bug, we do return
HTTP/2 as a supported protocol in ALPN extension during initial
handshake. We are going to fix this bug soon but until then, you can
configure your client to always use HTTP/1 protocol which is supported
and works well.

Please vote for this feature on Azure IoT Feedback channel so that we
can prioritize it. Thanks!

HTTP 2.0 support

https://feedback.azure.com/forums/321918-azure-iot/suggestions/9958737-http-2-0-support

Details:
https://social.msdn.microsoft.com/Forums/azure/en-US/0cf59124-f8f0-4fb2-ba20-5666894341cb/errspdyinadequatetransportsecurity-error-on-rest-api-call-in-chrome?forum=azureiothub