internal static void ConfigureWebDefaults(IWebHostBuilder builder)
{
builder.ConfigureAppConfiguration((ctx, cb) =>
{
if (ctx.HostingEnvironment.IsDevelopment())
{
StaticWebAssetsLoader.UseStaticWebAssets(ctx.HostingEnvironment, ctx.Configuration);
}
});
builder.UseKestrel((builderContext, options) =>
{
options.Configure(builderContext.Configuration.GetSection("Kestrel"), reloadOnChange: true);
})
.ConfigureServices((hostingContext, services) =>
{
// Fallback
services.PostConfigure <HostFilteringOptions>(options =>
{
if (options.AllowedHosts == null || options.AllowedHosts.Count == 0)
{
// "AllowedHosts": "localhost;127.0.0.1;[::1]"
var hosts = hostingContext.Configuration["AllowedHosts"]?.Split(new[] { ';' }, StringSplitOptions.RemoveEmptyEntries);
// Fall back to "*" to disable.
options.AllowedHosts = (hosts?.Length > 0 ? hosts : new[] { "*" });
}
});
// Change notification
services.AddSingleton <IOptionsChangeTokenSource <HostFilteringOptions> >(
new ConfigurationChangeTokenSource <HostFilteringOptions>(hostingContext.Configuration));
services.AddTransient <IStartupFilter, HostFilteringStartupFilter>();
if (string.Equals("true", hostingContext.Configuration["ForwardedHeaders_Enabled"], StringComparison.OrdinalIgnoreCase))
{
services.Configure <ForwardedHeadersOptions>(options =>
{
options.ForwardedHeaders = ForwardedHeaders.XForwardedFor | ForwardedHeaders.XForwardedProto;
// Only loopback proxies are allowed by default. Clear that restriction because forwarders are
// being enabled by explicit configuration.
options.KnownNetworks.Clear();
options.KnownProxies.Clear();
});
services.AddTransient <IStartupFilter, ForwardedHeadersStartupFilter>();
}
services.AddRouting();
})
.UseIIS()
.UseIISIntegration();
}
