Serving static html using Gorilla mux - html

Question

I'm using gorilla serve mux to serve static html files.
r := mux.NewRouter()
r.PathPrefix("/").Handler(http.FileServer(http.Dir("./public"))).Methods("GET")
I do have a Index.html file inside the public folder as well as other html files.
When browsing the site I get all the content of the folder instead of the default Index.html.
I came from C# and I know that IIS takes Index.html as default but it is possible to select any page as a default.
I wanted to know if there's a proper way to select a default page to serve in Gorilla mux without creating a custom handler/wrapper.

Answer 1

Maybe using a custom http.HandlerFunc would be easier:
http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
// Here you can check if path is empty, you can render index.html
http.ServeFile(w, r, r.URL.Path)
})

Answer 2

You do have to make a custom handler because you want a custom behavior. Here, I just wrapped the http.FileServer handler.
Try this one:
package main
import (
"log"
"net/http"
"github.com/gorilla/mux"
)
func main() {
handler := mux.NewRouter()
fs := http.FileServer(http.Dir("./public"))
handler.PathPrefix("/").Handler(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
if r.URL.Path == "/" {
//your default page
r.URL.Path = "/my_default_page.html"
}
fs.ServeHTTP(w, r)
})).Methods("GET")
log.Fatal(http.ListenAndServe(":8080", handler))
}
So, from the code, if the visited path is the root (/) then you rewrite the r.URL.Path to your default page, in this case my_default_page.html.

Answer 3

After grabthefish mentioned it i decided to check the actual code of gorilla serve mux.
This code is taken from net/http package which Gorilla mux is based on.
func serveFile(w ResponseWriter, r *Request, fs FileSystem, name string,
redirect bool) {
const indexPage = "/index.html"
// redirect .../index.html to .../
// can't use Redirect() because that would make the path absolute,
// which would be a problem running under StripPrefix
if strings.HasSuffix(r.URL.Path, indexPage) {
localRedirect(w, r, "./")
return
}
the code request the index file to be index.html in lower case so renaming my index file solved it.
thank you grabthefish!