CC @neild

you could just use start_url: "/" ?

you could just use start_url: "/" ?

@seankhliao This is not my own PWA app, I think it is unreasonable and unacceptable to modify someone else's code(e.g., https://github.com/mdn/pwa-examples).

Imagine other scenario, I want /index.html to show index pages and / to list file list. It's too hard too implement this with net/http/fs

I think it's reasonable to want an http.FileServer that doesn't redirect .../index.html requests, but I'm not sure what the API for it should be.

One thought might be to only redirect an .../index.html request if the index.html file doesn't exist. That is, try opening the file, and only consider redirecting the request if the open fails.

I think the easiest way to do this is to provide an optional chained method like this:

	fileServer := http.FileServer(fs)

	////  Is better to let http.FileServer return Struct instead of interface? 
	// fileServer := http.FileServer(fs).SkipPermanentRedirect() 

	// skip 301 redirect
	fileServer.(*http.FileHandler).SkipPermanentRedirect()

8a1fd33#diff-334dd14b9fe9d920086cc14ef1a9f13ac90972a7b289b944d00d4a9be6891a98R23

In the spirit of http.StripPrefix, this could just be an http middleware layer (untested):

func StripIndex(h http.Handler) http.Handler {
    return http.HandlerFunc(func(rw http.ResponseWriter, r *http.Request {
        r.URL.Path = strings.TrimSuffix(r.URL.Path, "index.html")
        h.ServeHTTP(rw, r)
    })
}

In the spirit of http.StripPrefix, this could just be an http middleware layer (untested):

func StripIndex(h http.Handler) http.Handler {
    return http.HandlerFunc(func(rw http.ResponseWriter, r *http.Request {
        r.URL.Path = strings.TrimSuffix(r.URL.Path, "index.html")
        h.ServeHTTP(rw, r)
    })
}

This is some like what I did in hack GONIC code:

	fileServer := http.FileServer(fs)
	return func(c *gin.Context) {
		.....
		// Replace `/index.html` with `/` to stop 301 redirect
		if strings.HasSuffix(c.Request.URL.Path, "/index.html") {
			c.Request.URL.Path = strings.TrimSuffix(c.Request.URL.Path, "index.html")
		}

		fileServer.ServeHTTP(c.Writer, c.Request)
        }

It works well, but I think injecting logic into every request is not so KISS———
If I can't modify the default redirection action at the begin of initialize http.FileServer(fs),
it may be no so easy to inject this logic to http handler if a project do not expose this http handler.