public SpaPageWriter(IYesSpaConfiguration spaConfiguration, IStubPageWriter stubPageWriter, ILogger logger, bool isDevelopmentEnvironment, bool useStubPage)
{
_isDevelopmentEnvironment = isDevelopmentEnvironment;
_useStubPage = useStubPage;
_defaultPageRewrites = spaConfiguration.CreateDefaultPageRewrites();
_stubPageWriter = stubPageWriter;
_logger = logger;
_logRequestMatch = LoggerMessage.Define <string, bool>(LogLevel.Debug, 1, "Matched request '{RequestPath}', result: {Result}");
}
public static void Attach(IApplicationBuilder applicationBuilder, StaticFileOptions staticFileOptions, IYesSpaConfiguration spaConfiguration)
{
var options = spaConfiguration.Options;
var hostingEnvironment = applicationBuilder.ApplicationServices.GetService <IHostingEnvironment>();
var loggerFactory = applicationBuilder.ApplicationServices.GetRequiredService <ILoggerFactory>();
var logger = loggerFactory.CreateLogger <SpaMiddlewareAspNetCore>();
var stubPageWriter = new StubPageWriter(logger);
var defaultPageWriter = new SpaPageWriter(spaConfiguration, stubPageWriter, logger, hostingEnvironment.IsDevelopment(), options.UseStubPage);
// Rewrite requests to the default pages
applicationBuilder.Use(async(context, next) =>
{
var shouldStop = await defaultPageWriter.TryRewriteSpaRequest(context);
if (!shouldStop)
{
await next();
}
});
// Serve it as a static file
// Developers who need to host more than one SPA with distinct default pages can
// override the file provider
applicationBuilder.UseStaticFiles(staticFileOptions);
// If the default file didn't get served as a static file (usually because it was not
// present on disk), the SPA is definitely not going to work.
applicationBuilder.Use((context, next) =>
{
var message = "The SPA default page middleware could not return the default page " +
$"because it was not found, and no other middleware " +
"handled the request.\n";
// Try to clarify the common scenario where someone runs an application in
// Production environment without first publishing the whole application
// or at least building the SPA.
var hostEnvironment = (IHostingEnvironment)context.RequestServices.GetService(typeof(IHostingEnvironment));
if (hostEnvironment != null && hostEnvironment.IsProduction())
{
message += "Your application is running in Production mode, so make sure it has " +
"been published, or that you have built your SPA manually. Alternatively you " +
"may wish to switch to the Development environment.\n";
}
throw new InvalidOperationException(message);
});
}
