C#•3y ago

Setting response code for SPA static file to 404?

Hi, I have a problem - I need ngsw.config missing file to return 404 instead of SPA 200 with index.html. I tried it setting with OnPrepareResponse but apparently you cannot change status code there? SPA site is hosted on IIS. How can I make non existing file ngsw.config return 404 status code? Startup.cs part (the one if(context.File.Name.StartsWith("ngsw.json"))):

// Client
app.UseStaticFiles();
if (!env.IsDevelopment())
{
    app.UseSpaStaticFiles();
}

app.UseSpa(spa =>
{
    spa.Options.SourcePath = "../ClientApp";

    spa.Options.DefaultPageStaticFileOptions = new StaticFileOptions
    {
        OnPrepareResponse = context =>
        {
            // force rechecking Angular's index.html to prevent using index.html that references old scripts
            if (context.File.Name == "index.html")
            {
                context.Context.Response.Headers.Add("Cache-Control", "no-cache, no-store, must-revalidate");
                context.Context.Response.Headers.Add("Pragma", "no-cache");
                context.Context.Response.Headers.Add("Expires", "0");
            }

            // to get rid of running service workers return 404 on cache bust as fail-safe deactivation
            if (context.File.Name.StartsWith("ngsw.json"))
            {
                context.Context.Response.StatusCode = 404;
            }
        },
    };

    if (env.IsDevelopment())
    {
        spa.UseAngularCliServer(npmScript: "start");
    }
});

// Client
app.UseStaticFiles();
if (!env.IsDevelopment())
{
    app.UseSpaStaticFiles();
}

app.UseSpa(spa =>
{
    spa.Options.SourcePath = "../ClientApp";

    spa.Options.DefaultPageStaticFileOptions = new StaticFileOptions
    {
        OnPrepareResponse = context =>
        {
            // force rechecking Angular's index.html to prevent using index.html that references old scripts
            if (context.File.Name == "index.html")
            {
                context.Context.Response.Headers.Add("Cache-Control", "no-cache, no-store, must-revalidate");
                context.Context.Response.Headers.Add("Pragma", "no-cache");
                context.Context.Response.Headers.Add("Expires", "0");
            }

            // to get rid of running service workers return 404 on cache bust as fail-safe deactivation
            if (context.File.Name.StartsWith("ngsw.json"))
            {
                context.Context.Response.StatusCode = 404;
            }
        },
    };

    if (env.IsDevelopment())
    {
        spa.UseAngularCliServer(npmScript: "start");
    }
});

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Setting response code for SPA static file to 404?