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package main
import (
"context"
"fmt"
"log"
"net/http"
"os"
"strconv"
"sync"
"github.com/gotk3/gotk3/glib"
"github.com/gotk3/gotk3/gtk"
)
var (
DEFAULT_PORT, DEFAULT_DIR string = "8080", "."
)
func serve(port, dir string, wg *sync.WaitGroup) *http.Server {
mux := http.NewServeMux()
mux.Handle("/", http.FileServer(http.Dir(dir)))
server := &http.Server{Addr: ":" + port, Handler: mux}
if port == "" { port = DEFAULT_PORT }
if dir == "" { dir = DEFAULT_DIR }
go func() {
defer wg.Done()
if err := server.ListenAndServe(); err != http.ErrServerClosed {
// TODO: show error in GTK error window
log.Printf("Error while running HTTP server: %v\n", err)
}
}()
return server
}
func main() {
app, _ := gtk.ApplicationNew("net.mikunonaka.gofileserver", glib.APPLICATION_FLAGS_NONE)
app.Connect("activate", func() { onActivate(app) })
app.Run(os.Args)
}
func onActivate(app *gtk.Application) {
win, _ := gtk.ApplicationWindowNew(app)
win.SetTitle("HTTP File Server")
win.SetDefaultSize(400, 400)
box, _ := gtk.BoxNew(gtk.ORIENTATION_VERTICAL, 0)
dirBox, _ := gtk.BoxNew(gtk.ORIENTATION_HORIZONTAL, 0)
dirLabel, _ := gtk.LabelNew("Directory to serve: ")
dirBox.PackStart(dirLabel, false, false, 5)
dirInput, _ := gtk.EntryNew()
dirInput.SetText(DEFAULT_DIR)
dirBox.PackEnd(dirInput, false, false, 5)
browseButton, _ := gtk.FileChooserButtonNew("Browse", gtk.FILE_CHOOSER_ACTION_SELECT_FOLDER)
dirBox.PackEnd(browseButton, false, false, 5)
box.PackStart(dirBox, false, false, 5)
portBox, _ := gtk.BoxNew(gtk.ORIENTATION_HORIZONTAL, 0)
portLabel, _ := gtk.LabelNew("Port:")
portBox.PackStart(portLabel, false, false, 5)
portInput, _ := gtk.EntryNew()
portInput.SetText(DEFAULT_PORT)
portBox.PackEnd(portInput, false, false, 5)
box.PackStart(portBox, false, false, 5)
buttonBox, _ := gtk.BoxNew(gtk.ORIENTATION_HORIZONTAL, 0)
buttonSwitch, _ := gtk.ToggleButtonNew()
buttonSwitch.SetLabel("Start")
buttonBox.PackStart(buttonSwitch, true, true, 0)
box.PackStart(buttonBox, false, false, 5)
statusLabel, _ := gtk.LabelNew("")
box.PackStart(statusLabel, false, true, 10)
browseButton.Connect("selection-changed", func() {
dirInput.SetText(browseButton.GetFilename())
})
var on = false
var server *http.Server
buttonSwitch.Connect("toggled", func() {
// TODO: validate dir and port
port, _ := portInput.GetText()
dir, _ := dirInput.GetText()
if on {
server.Shutdown(context.TODO())
} else {
go func() {
killServerDone := &sync.WaitGroup{}
server = serve(port, dir, killServerDone)
killServerDone.Add(1)
// do this after server starts
on = true
buttonSwitch.SetLabel("Stop")
statusLabel.SetText(fmt.Sprintf("Serving directory '%s' on PORT %s", dir, port))
dirInput.SetEditable(false)
dirInput.SetCanFocus(false)
portInput.SetEditable(false)
portInput.SetCanFocus(false)
killServerDone.Wait()
// do this after server shuts down
on = false
buttonSwitch.SetLabel("Start")
statusLabel.SetText("")
dirInput.SetEditable(true)
dirInput.SetCanFocus(true)
portInput.SetEditable(true)
portInput.SetCanFocus(true)
}()
}
})
portInput.Connect("insert-text", func(_ *gtk.Entry, input string) {
if _, err := strconv.Atoi(input); err != nil {
// if input is not numeric, don't insert
portInput.StopEmission("insert-text")
} else {
// stop if port number is invalid / out of range
currentInput, _ := portInput.GetText()
nextInput := currentInput + input
n, _ := strconv.Atoi(nextInput)
if n < 0 || n > 65535 {
portInput.StopEmission("insert-text")
}
}
})
win.Add(box)
win.ShowAll()
}
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