Cache busting index.html in a .Net Core Angular 5 website

Not a neat or perfect solution but this seems to have worked and might get people on the right track:

In Configure() in Startup.cs I added this

app.Use(async (c, next) =>
{
    if (c.Request.Path == "/")
    {
        c.Response.Headers.Add("Cache-Control", "no-store,no-cache");
        c.Response.Headers.Add("Pragma", "no-cache");
    }
    await next();
});

Since adding this I haven't been able to reproduce my issue.

Here's what I ended up with after combining a bunch of answers. My goal was to never cache index.html. While I was in there, and since Angular nicely cache-busts the js and css files, I had it cache all other assets for a year.

Just make sure you're using a cache-busting mechanism for assets, like images, that you're managing outside of Angular.

public void Configure(IApplicationBuilder app, IHostingEnvironment env)
{
  // ...
  app.UseStaticFiles();

  if (env.IsDevelopment())
  {
    // no caching
    app.UseSpaStaticFiles();
  }
  else
  {
    app.UseSpaStaticFiles(new StaticFileOptions
    {
      OnPrepareResponse = context =>
      {
        context.Context.Response.Headers.Add("Cache-Control", "max-age=31536000");
        context.Context.Response.Headers.Add("Expires", "31536000");
      }
    });
  }

  // ...

  app.UseSpa(spa =>
  {
    spa.Options.DefaultPageStaticFileOptions = new StaticFileOptions
    {
      OnPrepareResponse = context =>
      {
        // never cache index.html
        if (context.File.Name == "index.html")
        {
          context.Context.Response.Headers.Add("Cache-Control", "no-cache, no-store");
          context.Context.Response.Headers.Add("Expires", "-1");
        }
      }
    };
  });
}

Other StackOverflow Answers: Disable Caching in .Net Core | Cache for a year