Golang Static File Server

The example below uses gorilla/mux package

package main

import (
  "fmt"
  "log"
  "net/http"
  "github.com/gorilla/mux"
)

func YourHandler(w http.ResponseWriter, r *http.Request) {
  fmt.Fprintf(w, "Gorilla!\n")
}

func UnauthorizedHandler(w http.ResponseWriter, r *http.Request) {
  w.WriteHeader(401)
  fmt.Fprintf(w, "401 Unauthorized\n")
}

func NotFoundHandler(w http.ResponseWriter, r *http.Request) {
  w.WriteHeader(404)
  fmt.Fprintf(w, "404 Not Found\n")
}

func main() {
  r := mux.NewRouter()
  r.HandleFunc("/", YourHandler)
  d := "/static/"
  r.HandleFunc(d, UnauthorizedHandler) // prevent directory listing
  r.HandleFunc(d+"{filename:[a-zA-Z0-9]+}.gif", NotFoundHandler) // black list file type
  r.PathPrefix(d).Handler(http.StripPrefix(d, http.FileServer(http.Dir("."+d))))
  log.Fatal(http.ListenAndServe(":8000", r))
}

Save the codes above into a file, lets call it “fileserver.go”. In the same location create a directory named “static”. Run it by

go run fileserver.go

Place some jpg, gif or txt files into “static” folder. Lets say you placed a file named “helloworld.txt”. To browse it

http://localhost:8000/static/helloworld.txt

< Back to all the stories I had written