public override void Configure(IFunctionsHostBuilder builder)
{
try
{
// get content and webroot path for the function app.
var assemblyPath = new DirectoryInfo(Path.GetDirectoryName(typeof(Startup).Assembly.Location));
var contentRootPath = assemblyPath.Parent.FullName;
var webRootPath = Path.Combine(contentRootPath, "wwwroot");
// create config and hosting environment
var configRoot = new ConfigurationBuilder()
.SetBasePath(Environment.CurrentDirectory)
.AddEnvironmentVariables()
.Build();
var config = configRoot.GetWebJobsRootConfiguration();
var hostingEnv = new FunctionAppHostingEnvironment()
{
ContentRootPath = contentRootPath,
WebRootPath = webRootPath,
ContentRootFileProvider = new PhysicalFileProvider(contentRootPath),
WebRootFileProvider = new PhysicalFileProvider(webRootPath),
ApplicationName = typeof(WebApp.Startup).Assembly.FullName,
EnvironmentName = Environments.Development
};
// configure services for web app.
var webAppServices = new ServiceCollection();
var diagnosticSource = new DiagnosticListener(hostingEnv.ApplicationName);
webAppServices.AddSingleton <DiagnosticSource>(diagnosticSource);
webAppServices.AddSingleton(diagnosticSource);
webAppServices.AddSingleton <ObjectPoolProvider>(new DefaultObjectPoolProvider());
webAppServices.AddSingleton <IHostApplicationLifetime, ApplicationLifetime>();
webAppServices.AddSingleton <IWebHostEnvironment>(hostingEnv);
webAppServices.AddSingleton <IConfiguration>(configRoot);
// startup webapp
var webAppStartUp = new WebApp.Startup(configRoot);
webAppStartUp.ConfigureServices(webAppServices);
var serviceProvider = webAppServices.BuildServiceProvider();
//var serviceProvider = webAppServices.BuildServiceProvider();
var appBuilder = new ApplicationBuilder(serviceProvider, new FeatureCollection());
webAppStartUp.Configure(appBuilder, hostingEnv);
// create request delegate from the configured app builder
var requestDelegate = appBuilder.Build();
builder.Services.AddSingleton(requestDelegate);
// create instance of WebApp ServiceProvider for resolving the service provider for the web app over DI.
var webAppServiceProvider = new WebAppServiceProvider
{
ServiceProvider = serviceProvider
};
builder.Services.AddSingleton(webAppServiceProvider);
}
catch (Exception e)
{
Console.WriteLine(e);
// log exception to app insights if instrumentation key is available.
var appInsightsInstrumentationKey = Environment.GetEnvironmentVariable("APPINSIGHTS_INSTRUMENTATIONKEY", EnvironmentVariableTarget.Process);
if (!string.IsNullOrWhiteSpace(appInsightsInstrumentationKey))
{
#pragma warning disable CS0618 // Type or member is obsolete
var telemetryClient = new TelemetryClient {
InstrumentationKey = appInsightsInstrumentationKey
};
#pragma warning restore CS0618 // Type or member is obsolete
telemetryClient.TrackException(e);
}
throw e;
}
}
public WebAppProxy(RequestDelegate requestDelegate, WebAppServiceProvider serviceProvider)
{
_requestDelegate = requestDelegate;
_serviceProvider = serviceProvider;
}