/// <summary>
/// Registers ourselves with IoTHub so we can send messages to it
/// </summary>
private void SelfRegisterWithIoTHub(string ownerConnectionString)
{
string[] parsedConnectionString = IoTHubRegistration.ParseConnectionString(ownerConnectionString, false);
string deviceConnectionString = string.Empty;
if ((parsedConnectionString != null) && (parsedConnectionString.Length == 3))
{
string IoTHubName = parsedConnectionString[0];
string name = parsedConnectionString[1];
string accessToken = parsedConnectionString[2];
using (HttpClient httpClient = new HttpClient())
{
httpClient.BaseAddress = new UriBuilder {
Scheme = "https", Host = IoTHubName
}.Uri;
string sharedAccessSignature = IoTHubRegistration.GenerateSharedAccessToken(name, Convert.FromBase64String(accessToken), IoTHubName, 60000);
httpClient.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("SharedAccessSignature", sharedAccessSignature);
deviceConnectionString = IoTHubRegistration.CreateDeviceInIoTHubDeviceRegistry(httpClient, m_configuration.ApplicationName.Replace(" ", "")).Result;
// prepend the rest of the connection string
deviceConnectionString = "HostName=" + IoTHubName + ";DeviceId=" + m_configuration.ApplicationName.Replace(" ", "") + ";SharedAccessKey=" + deviceConnectionString;
SecureIoTHubToken.Write(m_configuration.ApplicationName, deviceConnectionString);
}
}
else
{
Trace("Opc.Ua.Publisher.Module: Could not parse IoT Hub owner connection string: " + ownerConnectionString);
}
}
/// <summary>
/// Data node in the server which registers ourselves with IoT Hub when this node is written to
/// </summary>
public ServiceResult ConnectionStringWrite(ISystemContext context, NodeState node, NumericRange indexRange, QualifiedName dataEncoding, ref object value, ref StatusCode statusCode, ref DateTime timestamp)
{
var connectionString = value as string;
if (string.IsNullOrEmpty(connectionString))
{
Module.Trace("ConnectionStringWrite: Invalid Argument!");
return(ServiceResult.Create(StatusCodes.BadArgumentsMissing, "Please provide all arguments as strings!"));
}
statusCode = StatusCodes.Bad;
timestamp = DateTime.Now;
// read current connection string and compare to the one passed in
string currentConnectionString = SecureIoTHubToken.Read(Module.m_configuration.ApplicationName);
if (string.Equals(connectionString, currentConnectionString, StringComparison.OrdinalIgnoreCase))
{
Module.Trace("ConnectionStringWrite: Connection string up to date!");
return(ServiceResult.Create(StatusCodes.Bad, "Connection string already up-to-date!"));
}
// try to parse connection string
string[] parsedConnectionString = IoTHubRegistration.ParseConnectionString(connectionString, true);
if ((parsedConnectionString == null) || (parsedConnectionString.Length != 3))
{
Module.Trace("ConnectionStringWrite: Connection string parsing error: " + connectionString);
return(ServiceResult.Create(StatusCodes.BadArgumentsMissing, "Could not parse connection string!"));
}
// write connection string
try
{
SecureIoTHubToken.Write(Module.m_configuration.ApplicationName, connectionString);
}
catch (Exception ex)
{
statusCode = StatusCodes.Bad;
Module.Trace("ConnectionStringWrite: Exception: " + ex.ToString());
return(ServiceResult.Create(StatusCodes.Bad, "Publisher registration failed: " + ex.Message));
}
try
{
// try to configure our publisher component
Module.TryConfigurePublisherAsync().Wait();
}
catch (Exception ex)
{
statusCode = StatusCodes.Bad;
Module.Trace("ConnectionStringWrite: Exception: " + ex.ToString());
return(ServiceResult.Create(StatusCodes.Bad, "Publisher configuration failed: " + ex.Message));
}
statusCode = StatusCodes.Good;
Module.Trace("ConnectionStringWrite: Success!");
return(statusCode);
}
/// <summary>
/// Try to configure our Publisher settings
/// </summary>
public static async Task TryConfigurePublisherAsync()
{
// read connection string from secure store and configure publisher, if possible
if ((m_configuration != null) && (!string.IsNullOrEmpty(m_configuration.ApplicationName)))
{
Trace("Opc.Ua.Publisher.Module: Attemping to read connection string from secure store with certificate name: " + m_configuration.ApplicationName);
string connectionString = SecureIoTHubToken.Read(m_configuration.ApplicationName);
if (!string.IsNullOrEmpty(connectionString))
{
Trace("Opc.Ua.Publisher.Module: Attemping to configure publisher with connection string: " + connectionString);
string[] parsedConnectionString = IoTHubRegistration.ParseConnectionString(connectionString, true);
if ((parsedConnectionString != null) && (parsedConnectionString.Length == 3))
{
// note: IoTHub name can't be changed during runtime in the GW IoTHub module
string _IoTHubName = parsedConnectionString[0];
m_deviceName = parsedConnectionString[1];
m_accessKey = parsedConnectionString[2];
Trace("Opc.Ua.Publisher.Module: Publisher configured for device: " + m_deviceName);
// try to connect to IoT Hub
using (HttpClient httpClient = new HttpClient())
{
httpClient.BaseAddress = new UriBuilder {
Scheme = "https", Host = _IoTHubName
}.Uri;
string sharedAccessToken = IoTHubRegistration.GenerateSharedAccessToken(string.Empty, Convert.FromBase64String(m_accessKey), _IoTHubName, 60000);
httpClient.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("SharedAccessSignature", sharedAccessToken);
// send an empty d2c message
HttpRequestMessage request = new HttpRequestMessage(HttpMethod.Post, "/devices/" + m_deviceName + "/messages/events" + IoTHubRegistration._IoTHubAPIVersion);
HttpResponseMessage response = await httpClient.SendAsync(request).ConfigureAwait(false);
if (response.StatusCode != HttpStatusCode.NoContent)
{
throw new Exception("Opc.Ua.Publisher.Module: Could not connect to IoT Hub. Response: " + response.ToString());
}
}
}
else
{
throw new Exception("Opc.Ua.Publisher.Module: Publisher configuration failed!");
}
}
else
{
Trace("Opc.Ua.Publisher.Module: Connection string not found in secure store.");
}
}
}
public static void Main(string[] args)
{
// check for OSX, which we don't support
if (RuntimeInformation.IsOSPlatform(OSPlatform.OSX))
{
throw new NotSupportedException("OSX is not supported by the Gateway App on .Net Core");
}
// patch IoT Hub module DLL name
string gatewayConfigFile = "gatewayconfig.json";
if (RuntimeInformation.IsOSPlatform(OSPlatform.Linux))
{
Console.WriteLine("Target system is Linux.");
File.WriteAllText(gatewayConfigFile, File.ReadAllText(gatewayConfigFile).Replace("iothub.dll", "libiothub.so"));
}
else
{
Console.WriteLine("Target system is Windows.");
File.WriteAllText(gatewayConfigFile, File.ReadAllText(gatewayConfigFile).Replace("libiothub.so", "iothub.dll"));
}
// print target system info
if (IsX64Process())
{
Console.WriteLine("Target system is 64-bit.");
}
else
{
Console.WriteLine("Target system is 32-bit.");
throw new Exception("32-bit systems are currently not supported due to https://github.com/Azure/azure-iot-gateway-sdk/releases#known-issues");
}
// make sure our gateway runtime DLLs are in the current directory
string runtimesFolder = GetPathToRuntimesFolder(Directory.GetCurrentDirectory());
if (string.IsNullOrEmpty(runtimesFolder))
{
throw new Exception("Runtimes folder not found. Please make sure you have published the gateway app!");
}
// we always copy them across, overwriting existing ones, to make sure we have the right ones
string pathToNativeGatewayModules = runtimesFolder + Path.DirectorySeparatorChar + GetRuntimeID() + Path.DirectorySeparatorChar + "native";
List <string> filePaths = new List <string>(Directory.EnumerateFiles(pathToNativeGatewayModules));
foreach (string sourcefilePath in filePaths)
{
string destinationFilePath = Directory.GetCurrentDirectory() + Path.DirectorySeparatorChar + Path.GetFileName(sourcefilePath);
File.Copy(sourcefilePath, destinationFilePath, true);
}
// check if we got command line arguments to patch our gateway config file and register ourselves with IoT Hub
if ((args.Length > 0) && !string.IsNullOrEmpty(args[0]))
{
string applicationName = args[0];
File.WriteAllText(gatewayConfigFile, File.ReadAllText(gatewayConfigFile).Replace("<ReplaceWithYourApplicationName>", applicationName));
Console.WriteLine("Gateway config file patched with application name: " + applicationName);
// check if we also received an owner connection string to register ourselves with IoT Hub
if ((args.Length > 1) && !string.IsNullOrEmpty(args[1]))
{
string ownerConnectionString = args[1];
Console.WriteLine("Attemping to register ourselves with IoT Hub using owner connection string: " + ownerConnectionString);
string deviceConnectionString = IoTHubRegistration.RegisterDeviceWithIoTHub(applicationName, ownerConnectionString);
if (!string.IsNullOrEmpty(deviceConnectionString))
{
SecureIoTHubToken.Write(applicationName, deviceConnectionString);
}
else
{
Console.WriteLine("Could not register ourselves with IoT Hub using owner connection string: " + ownerConnectionString);
}
}
else
{
Console.WriteLine("IoT Hub owner connection string not passed as argument, registration with IoT Hub abandoned.");
}
// try to read connection string from secure store and patch gateway config file
Console.WriteLine("Attemping to read connection string from secure store with certificate name: " + applicationName);
string connectionString = SecureIoTHubToken.Read(applicationName);
if (!string.IsNullOrEmpty(connectionString))
{
Console.WriteLine("Attemping to configure publisher with connection string: " + connectionString);
string[] parsedConnectionString = IoTHubRegistration.ParseConnectionString(connectionString, true);
if ((parsedConnectionString != null) && (parsedConnectionString.Length == 3))
{
string _IoTHubName = parsedConnectionString[0];
if (_IoTHubName.Contains("."))
{
_IoTHubName = _IoTHubName.Substring(0, _IoTHubName.IndexOf('.'));
}
File.WriteAllText(gatewayConfigFile, File.ReadAllText(gatewayConfigFile).Replace("<ReplaceWithYourIoTHubName>", _IoTHubName));
Console.WriteLine("Gateway config file patched with IoT Hub name: " + _IoTHubName);
}
else
{
throw new Exception("Could not parse persisted device connection string!");
}
}
else
{
Console.WriteLine("Device connection string not found in secure store.");
}
}
else
{
Console.WriteLine("Application name not passed as argument, patching gateway config file abandoned");
}
IntPtr gateway = GatewayInterop.CreateFromJson(gatewayConfigFile);
if (gateway != IntPtr.Zero)
{
Console.WriteLine(".NET Core Gateway is running. Press enter to quit.");
Console.ReadLine();
GatewayInterop.Destroy(gateway);
}
else
{
Console.WriteLine(".NET Core Gateway failed to initialize.");
}
}
/// <summary>
/// Create module, throws if configuration is bad
/// </summary>
public void Create(Broker broker, byte[] configuration)
{
Trace("Opc.Ua.Publisher.Module: Creating...");
m_broker = broker;
string configString = Encoding.UTF8.GetString(configuration);
// Deserialize from configuration string
ModuleConfiguration moduleConfiguration = null;
try
{
moduleConfiguration = JsonConvert.DeserializeObject <ModuleConfiguration>(configString);
}
catch (Exception ex)
{
Trace("Opc.Ua.Publisher.Module: Module config string " + configString + " could not be deserialized: " + ex.Message);
throw;
}
m_configuration = moduleConfiguration.Configuration;
m_configuration.CertificateValidator.CertificateValidation += new CertificateValidationEventHandler(CertificateValidator_CertificateValidation);
// update log configuration, if available
if (!string.IsNullOrEmpty(Environment.GetEnvironmentVariable("_GW_LOGP")))
{
m_configuration.TraceConfiguration.OutputFilePath = Environment.GetEnvironmentVariable("_GW_LOGP");
m_configuration.TraceConfiguration.ApplySettings();
}
// get a list of persisted endpoint URLs and create a session for each.
try
{
// check if we have an env variable specifying the published nodes path, otherwise use current directory
string publishedNodesFilePath = Directory.GetCurrentDirectory() + Path.DirectorySeparatorChar + "publishednodes.json";
if (!string.IsNullOrEmpty(Environment.GetEnvironmentVariable("_GW_PNFP")))
{
publishedNodesFilePath = Environment.GetEnvironmentVariable("_GW_PNFP");
}
Trace("Opc.Ua.Publisher.Module: Attemping to load nodes file from: " + publishedNodesFilePath);
m_nodesLookups = JsonConvert.DeserializeObject <PublishedNodesCollection>(File.ReadAllText(publishedNodesFilePath));
Trace("Opc.Ua.Publisher.Module: Loaded " + m_nodesLookups.Count.ToString() + " nodes.");
}
catch (Exception ex)
{
Trace("Opc.Ua.Publisher.Module: Nodes file loading failed with: " + ex.Message);
}
foreach (NodeLookup nodeLookup in m_nodesLookups)
{
if (!m_endpointUrls.Contains(nodeLookup.EndPointURL))
{
m_endpointUrls.Add(nodeLookup.EndPointURL);
}
}
// start the server
try
{
Trace("Opc.Ua.Publisher.Module: Starting server on endpoint " + m_configuration.ServerConfiguration.BaseAddresses[0].ToString() + "...");
m_server.Start(m_configuration);
Trace("Opc.Ua.Publisher.Module: Server started.");
}
catch (Exception ex)
{
Trace("Opc.Ua.Publisher.Module: Starting server failed with: " + ex.Message);
}
// check if we have an environment variable to register ourselves with IoT Hub
if (!string.IsNullOrEmpty(Environment.GetEnvironmentVariable("_HUB_CS")))
{
string ownerConnectionString = Environment.GetEnvironmentVariable("_HUB_CS");
if ((m_configuration != null) && (!string.IsNullOrEmpty(m_configuration.ApplicationName)))
{
Trace("Attemping to register ourselves with IoT Hub using owner connection string: " + ownerConnectionString);
string deviceConnectionString = IoTHubRegistration.RegisterDeviceWithIoTHub(m_configuration.ApplicationName, ownerConnectionString);
if (!string.IsNullOrEmpty(deviceConnectionString))
{
SecureIoTHubToken.Write(m_configuration.ApplicationName, deviceConnectionString);
}
else
{
Trace("Could not register ourselves with IoT Hub using owner connection string: " + ownerConnectionString);
}
}
}
// try to configure our publisher component
TryConfigurePublisherAsync().Wait();
// connect to servers
Trace("Opc.Ua.Publisher.Module: Attemping to connect to servers...");
try
{
List <Task> connectionAttempts = new List <Task>();
foreach (Uri endpointUrl in m_endpointUrls)
{
Trace("Opc.Ua.Publisher.Module: Connecting to server: " + endpointUrl);
connectionAttempts.Add(EndpointConnect(endpointUrl));
}
// Wait for all sessions to be connected
Task.WaitAll(connectionAttempts.ToArray());
}
catch (Exception ex)
{
Trace("Opc.Ua.Publisher.Module: Exception: " + ex.ToString() + "\r\n" + ex.InnerException != null ? ex.InnerException.ToString() : null);
}
Trace("Opc.Ua.Publisher.Module: Created.");
}
public static void Main(string[] args)
{
// check for OSX, which we don't support
if (RuntimeInformation.IsOSPlatform(OSPlatform.OSX))
{
throw new NotSupportedException("OSX is not supported by the Gateway App on .Net Core");
}
// patch IoT Hub module DLL name
string gatewayConfigFile = "gatewayconfig.json";
if (RuntimeInformation.IsOSPlatform(OSPlatform.Linux))
{
Console.WriteLine("Target system is Linux.");
File.WriteAllText(gatewayConfigFile, File.ReadAllText(gatewayConfigFile).Replace("iothub.dll", "libiothub.so"));
}
else
{
Console.WriteLine("Target system is Windows.");
File.WriteAllText(gatewayConfigFile, File.ReadAllText(gatewayConfigFile).Replace("libiothub.so", "iothub.dll"));
}
Console.WriteLine(RuntimeInformation.OSDescription);
// print target system info
if (IsX64Process())
{
Console.WriteLine("Target system is 64-bit.");
}
else
{
Console.WriteLine("Target system is 32-bit.");
throw new Exception("32-bit systems are currently not supported.");
}
// check if we got command line arguments to patch our gateway config file and register ourselves with IoT Hub
if ((args.Length > 0) && !string.IsNullOrEmpty(args[0]))
{
string applicationName = args[0];
File.WriteAllText(gatewayConfigFile, File.ReadAllText(gatewayConfigFile).Replace("<ReplaceWithYourApplicationName>", applicationName));
Console.WriteLine("Gateway config file patched with application name: " + applicationName);
// check if we also received an owner connection string to register ourselves with IoT Hub
if ((args.Length > 1) && !string.IsNullOrEmpty(args[1]))
{
string ownerConnectionString = args[1];
Console.WriteLine("Attemping to register ourselves with IoT Hub using owner connection string: " + ownerConnectionString);
string deviceConnectionString = IoTHubRegistration.RegisterDeviceWithIoTHub(applicationName, ownerConnectionString);
if (!string.IsNullOrEmpty(deviceConnectionString))
{
SecureIoTHubToken.Write(applicationName, deviceConnectionString);
}
else
{
Console.WriteLine("Could not register ourselves with IoT Hub using owner connection string: " + ownerConnectionString);
}
}
else
{
Console.WriteLine("IoT Hub owner connection string not passed as argument, registration with IoT Hub abandoned.");
}
// try to read connection string from secure store and patch gateway config file
Console.WriteLine("Attemping to read connection string from secure store with certificate name: " + applicationName);
string connectionString = SecureIoTHubToken.Read(applicationName);
if (!string.IsNullOrEmpty(connectionString))
{
Console.WriteLine("Attemping to configure publisher with connection string: " + connectionString);
string[] parsedConnectionString = IoTHubRegistration.ParseConnectionString(connectionString, true);
if ((parsedConnectionString != null) && (parsedConnectionString.Length == 3))
{
string _IoTHubName = parsedConnectionString[0];
if (_IoTHubName.Contains("."))
{
_IoTHubName = _IoTHubName.Substring(0, _IoTHubName.IndexOf('.'));
}
File.WriteAllText(gatewayConfigFile, File.ReadAllText(gatewayConfigFile).Replace("<ReplaceWithYourIoTHubName>", _IoTHubName));
Console.WriteLine("Gateway config file patched with IoT Hub name: " + _IoTHubName);
}
else
{
throw new Exception("Could not parse persisted device connection string!");
}
}
else
{
Console.WriteLine("Device connection string not found in secure store.");
}
}
else
{
Console.WriteLine("Application name not passed as argument, patching gateway config file abandoned");
}
IntPtr gateway = GatewayInterop.CreateFromJson(gatewayConfigFile);
if (gateway != IntPtr.Zero)
{
Console.WriteLine(".NET Core Gateway is running. Press enter to quit.");
Console.ReadLine();
GatewayInterop.Destroy(gateway);
}
else
{
Console.WriteLine(".NET Core Gateway failed to initialize. Please make sure you have published the GatewayApp.NetCore app to make sure the depend DLLs are available!");
}
}
