public static async Task <HttpResponseMessage> Run(HttpRequestMessage req, TraceWriter log)
{
dynamic data = await req.Content.ReadAsAsync <object>(); // Get request body
TtnEntity ttn = JsonConvert.DeserializeObject <TtnEntity>(data.ToString(), new JsonSerializerSettings()
{
ContractResolver = new CamelCasePropertyNamesContractResolver()
});
if (!ValidTtnApplicationId(ttn.app_id))
{
return(req.CreateResponse(HttpStatusCode.BadRequest));
}
var result = DecodeRawData(ttn.payload_raw);
string key = await GetDeviceKeyFromRegistry(ttn.hardware_serial); // get device key from IoT Hub Registry
if (key == null)
{
return(req.CreateResponse(HttpStatusCode.BadRequest));
}
await PostDataToIoTHub(host, key, result, ttn);
log.Info($"device '{ttn.hardware_serial}', payload '{result}', port: {ttn.port}");
return(req.CreateResponse(HttpStatusCode.OK));
}
public static async Task <bool> PostDataToIoTHub(string host, string key, string payload, TtnEntity ttn)
{
string restUri = $"https://{host}/devices/{ttn.hardware_serial}/messages/events?api-version={iotHubApiVersion}";
var sasToken = GetDeviceSaSToken(host, ttn.hardware_serial, key);
HttpClient client = new HttpClient();
client.DefaultRequestHeaders.Add("Authorization", sasToken);
client.DefaultRequestHeaders.Add("iothub-app-route-id", "ttn-" + ttn.app_id);
var content = new StringContent(telemetry.ToJson(payload, ttn.port));
var response = await client.PostAsync(restUri, content);
return(true);
}
