internal WebApplicationBuilder(WebApplicationOptions options, Action <IHostBuilder>?configureDefaults = null)
{
var configuration = new ConfigurationManager();
configuration.AddEnvironmentVariables(prefix: "ASPNETCORE_");
_hostApplicationBuilder = new HostApplicationBuilder(new HostApplicationBuilderSettings
{
Args = options.Args,
ApplicationName = options.ApplicationName,
EnvironmentName = options.EnvironmentName,
ContentRootPath = options.ContentRootPath,
Configuration = configuration,
});
// Set WebRootPath if necessary
if (options.WebRootPath is not null)
{
Configuration.AddInMemoryCollection(new[]
{
new KeyValuePair <string, string?>(WebHostDefaults.WebRootKey, options.WebRootPath),
});
}
// Run methods to configure web host defaults early to populate services
var bootstrapHostBuilder = new BootstrapHostBuilder(_hostApplicationBuilder);
// This is for testing purposes
configureDefaults?.Invoke(bootstrapHostBuilder);
bootstrapHostBuilder.ConfigureWebHostDefaults(webHostBuilder =>
{
// Runs inline.
webHostBuilder.Configure(ConfigureApplication);
webHostBuilder.UseSetting(WebHostDefaults.ApplicationKey, _hostApplicationBuilder.Environment.ApplicationName ?? "");
webHostBuilder.UseSetting(WebHostDefaults.PreventHostingStartupKey, Configuration[WebHostDefaults.PreventHostingStartupKey]);
webHostBuilder.UseSetting(WebHostDefaults.HostingStartupAssembliesKey, Configuration[WebHostDefaults.HostingStartupAssembliesKey]);
webHostBuilder.UseSetting(WebHostDefaults.HostingStartupExcludeAssembliesKey, Configuration[WebHostDefaults.HostingStartupExcludeAssembliesKey]);
},
options =>
{
// We've already applied "ASPNETCORE_" environment variables to hosting config
options.SuppressEnvironmentConfiguration = true;
});
// This applies the config from ConfigureWebHostDefaults
// Grab the GenericWebHostService ServiceDescriptor so we can append it after any user-added IHostedServices during Build();
_genericWebHostServiceDescriptor = bootstrapHostBuilder.RunDefaultCallbacks();
// Grab the WebHostBuilderContext from the property bag to use in the ConfigureWebHostBuilder. Then
// grab the IWebHostEnvironment from the webHostContext. This also matches the instance in the IServiceCollection.
var webHostContext = (WebHostBuilderContext)bootstrapHostBuilder.Properties[typeof(WebHostBuilderContext)];
Environment = webHostContext.HostingEnvironment;
Host = new ConfigureHostBuilder(bootstrapHostBuilder.Context, Configuration, Services);
WebHost = new ConfigureWebHostBuilder(webHostContext, Configuration, Services);
_webAuthBuilder = new WebApplicationAuthenticationBuilder(Services);
}
public void DefaultConfigIsMutable()
{
HostApplicationBuilder builder = CreateEmptyBuilder();
builder.Configuration["key1"] = "value1";
using IHost host = builder.Build();
var config = host.Services.GetRequiredService <IConfiguration>();
config["key2"] = "value2";
Assert.Equal("value1", config["key1"]);
Assert.Equal("value2", config["key2"]);
}
