public void ConfigureServices(IServiceCollection services)
{
services
.AddHttpContextAccessor()
.AddHttpClient()
.AddSingleton <EmailProcessor>()
.AddSingleton(serviceProvider => DispatcherConfig.FromConfiguration(serviceProvider, _configuration.GetSection("Dispatchers")))
.AddCors(b => b.AddDefaultPolicy(opts => opts
.AllowAnyHeader()
.AllowAnyMethod()
.AllowCredentials()
// must be at least 2 domains for CORS middleware to send Vary: Origin
.WithOrigins("https://example.com", "http://127.0.0.1")
.SetIsOriginAllowed(_ => true)
))
.AddRouting();
}
public static IHostBuilder CreateHostBuilder(string[] args)
{
var configuration = CreateConfiguration();
// MQTT client options
var mqttConfig = configuration.GetSection("Mqtt:Client").Get <MqttClientConfiguration>() ?? new MqttClientConfiguration();
var mqttClientOptions =
new MqttClientOptionsBuilder()
.WithTcpServer(mqttConfig.Host ?? throw new InvalidOperationException("No MQTT host supplied."), mqttConfig.Port)
.WithCleanSession(mqttConfig.CleanSession ?? true)
.WithClientId(mqttConfig.ClientId ?? "ncoreutils-email-client")
.Build();
return(new HostBuilder()
.UseConsoleLifetime()
.UseContentRoot(Environment.CurrentDirectory)
.UseEnvironment(Environment.GetEnvironmentVariable("DOTNET_ENVIRONMENT") ?? "Development")
.ConfigureLogging(b => b
.ClearProviders()
.AddConfiguration(configuration.GetSection("Logging"))
.AddConsole()
)
.ConfigureServices((context, services) =>
{
services
// HTTP client
.AddHttpClient()
// JSON serialization
.AddOptions <JsonSerializerOptions>().Services
.ConfigureOptions <ConfigureJson>()
.AddTransient(serviceProvider => serviceProvider.GetRequiredService <IOptionsMonitor <JsonSerializerOptions> >().CurrentValue)
// MQTT client
.AddSingleton <IMqttClientServiceOptions>(serviceProvider =>
{
var options = ActivatorUtilities.CreateInstance <MqttClientServiceOptions>(serviceProvider);
configuration.GetSection("Mqtt").Bind(options);
return options;
})
.AddSingleton(mqttClientOptions)
.AddHostedService <MqttSubscriberService>()
.AddSingleton <EmailProcessor>()
.AddSingleton(serviceProvider => DispatcherConfig.FromConfiguration(serviceProvider, configuration.GetSection("Dispatchers")));
}));
}
public EmailProcessor(ILogger <EmailProcessor> logger, DispatcherConfig config)
{
Logger = logger ?? throw new System.ArgumentNullException(nameof(logger));
_config = config ?? throw new System.ArgumentNullException(nameof(config));
}
