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package main
import (
"flag"
"fmt"
"log"
"math/rand"
"net"
"net/http"
"os"
"path/filepath"
"strconv"
"strings"
"time"
)
var path string
func RequestHandler(w http.ResponseWriter, r *http.Request) {
p := filepath.Join(path, strings.Replace(r.URL.Path, "..", "", -1))
http.ServeFile(w, r, p)
}
func main() {
var host string
var port uint64
flag.StringVar(&host, "host", "127.0.0.1", "IP address to listen on")
flag.Uint64Var(&port, "port", 0, "Port to listen on (default random)")
flag.StringVar(&path, "path", "./", "Absolute or relative path to serve")
flag.Parse()
if _, err := os.Stat(path); err != nil {
panic(err)
}
if port == 0 {
rand.Seed(time.Now().UnixNano())
for {
port = uint64(rand.Intn(65535-1024) + 1024)
conn, _ := net.DialTimeout("tcp", net.JoinHostPort(host,
strconv.Itoa(int(port))), time.Second)
if conn != nil {
conn.Close()
} else {
break
}
}
}
http.HandleFunc("/", RequestHandler)
fmt.Printf("Listening on %v port %v (http://%v:%v/)\n", host, port, host, port)
log.Fatal(http.ListenAndServe(fmt.Sprintf("%s:%d", host, port), nil))
}
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