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devserver.go
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devserver.go
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package main
import (
"fmt"
"io"
"net/http"
"os"
"path"
)
func SendFile(w io.Writer, filePath string) {
f, err := os.Open(filePath)
if err != nil {
fmt.Fprintf(w, err.Error())
return
}
defer f.Close()
_, err = io.Copy(w, f)
if err != nil {
fmt.Fprintf(w, err.Error())
return
}
}
func NotFound(w http.ResponseWriter, r *http.Request) {
//fmt.Fprintf(w, "my 404 page!")
SendFile(w, "website/404.html")
}
func FileServerWithCustom404(fs http.FileSystem) http.Handler {
fsh := http.FileServer(fs)
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
_, err := fs.Open(path.Clean(r.URL.Path))
if os.IsNotExist(err) {
NotFound(w, r)
return
}
fsh.ServeHTTP(w, r)
})
}
func main() {
servedDir := "website/"
http.ListenAndServe(":8000", FileServerWithCustom404(http.Dir(servedDir)))
}