Go serve files over HTTP. Useful for testing a HTML web application.

serve.go

package main

import (
        "log"
        "mime"
        "net/http"
        "path/filepath"
)

func main() {
        addr := ":8081"
        path := "."
        log.Printf("Server starting on %s", addr)
        mime.AddExtensionType(".svg", "image/svg+xml")
        mime.AddExtensionType(".json", "application/json")
        mime.AddExtensionType(".xslt", "text/xsl")
        htdocs, _ := filepath.Abs(path)
        fs := http.FileServer(http.Dir(htdocs))
        http.Handle("/", cors(fs))
        http.ListenAndServe(addr, nil)
}

func cors(fs http.Handler) http.HandlerFunc {
        return func(w http.ResponseWriter, r *http.Request) {
                w.Header().Add("Access-Control-Allow-Origin", "*")
                w.Header().Add("Access-Control-Allow-Credentials", "true")
                w.Header().Add("Access-Control-Allow-Headers", "Content-Type, Content-Length, Accept-Encoding, X-CSRF-Token, Authorization, accept, origin, Cache-Control, X-Requested-With")
                w.Header().Add("Access-Control-Allow-Methods", "POST, GET, OPTIONS, PUT, DELETE")

                if r.Method == "OPTIONS" {
                        http.Error(w, "No Content", http.StatusNoContent)
                        return
                }

                fs.ServeHTTP(w, r)
        }
}