Cache Busting Index.html In A .Net Core Angular 5 Website

Answer :

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

I add the following lines to the index.html head section, to prevent the file from being cached:

<meta http-equiv="Cache-control" content="no-cache, no-store, must-revalidate"> <meta http-equiv="Pragma" content="no-cache"> 

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.