static void Main(string[] args)
{
Credentials credentials = null;
string accountId = null;
string roleName = null;
if (args.Length == 2)
{
Console.WriteLine("Account ID and role name specified, publishing cross-account");
accountId = args[0];
roleName = args[1];
credentials = GetCrossAccountCredentials(accountId, roleName);
}
else
{
Console.WriteLine("An invalid number of options was specified, cannot continue");
Environment.Exit(1);
}
Console.WriteLine("Setting region to us-east-1");
var myRegion = Amazon.RegionEndpoint.USEast1;
Console.WriteLine("Creating IoT client");
AmazonIoTClient myIotClient = new AmazonIoTClient(credentials, myRegion);
Console.WriteLine(("Obtaining customer specific endpoint information for publishing messages to IoT Core"));
try
{
var describeEndpointResponse = myIotClient.DescribeEndpointAsync(new DescribeEndpointRequest()).Result;
var endpointAddress = "https://" + describeEndpointResponse.EndpointAddress;
Console.WriteLine("Starting infinite publish loop");
Console.WriteLine("Creating IoT data client for message publishing");
AmazonIotDataClient myIotDataClient = new AmazonIotDataClient(endpointAddress, credentials);
while (true)
{
if (credentials != null)
{
Console.WriteLine("Refreshing cross-account credentials and IoT data client");
credentials = GetCrossAccountCredentials(accountId, roleName);
myIotDataClient = new AmazonIotDataClient(endpointAddress, credentials);
}
Console.WriteLine("Creating a publish request with a test message");
// This is done inside the loop because re-using publish requests does not work on Mono on Linux
var publishRequest = new PublishRequest();
publishRequest.Qos = 0;
publishRequest.Topic = Constants.Topic;
publishRequest.Payload = new MemoryStream(Encoding.UTF8.GetBytes(Constants.Payload ?? ""));
var publishResponse = myIotDataClient.PublishAsync(publishRequest).Result;
Console.WriteLine("Published message, sleeping...");
Console.WriteLine(publishResponse.HttpStatusCode.ToString());
Thread.Sleep(Constants.SleepTime);
}
}
catch (AggregateException e)
{
// Simple check to see if the error looks like a missing role
if (e.Message.Contains("does not indicate success"))
{
Console.WriteLine(
"Failed to obtain the customer endpoint information or publish a message, is a role attached to this EC2 instance?");
}
else if (e.Message.Contains("is not authorized"))
{
Console.WriteLine(
"Access denied when obtaining the customer endpoint information or when publishing a message, does the role attached to this EC2 instance have the correct permissions?");
}
else
{
Console.WriteLine("FAIL Main");
Console.WriteLine(e.Message);
Console.WriteLine(e.StackTrace);
}
Environment.Exit(1);
}
}