87 lines
1.8 KiB
Go
87 lines
1.8 KiB
Go
package main
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import (
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"fmt"
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"net"
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"os"
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"os/signal"
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"strconv"
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"sync"
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"syscall"
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"time"
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"github.com/gofiber/fiber/v2"
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"github.com/gofiber/fiber/v2/middleware/etag"
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"github.com/kanna5/qrtxt"
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)
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func getLocalAddr() (string, error) {
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conn, err := net.Dial("udp", "1.0.0.1:53")
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if err != nil {
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return "", err
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}
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defer conn.Close()
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host, _, err := net.SplitHostPort(conn.LocalAddr().String())
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return host, err
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}
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func main() {
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listenPort := 8080
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var err error
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if len(os.Args) >= 2 {
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portStr := os.Args[1]
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listenPort, err = strconv.Atoi(portStr)
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}
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if err != nil {
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panic(fmt.Errorf("cannot parse port number: %w", err))
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}
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if listenPort < 1 || listenPort > 65535 {
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panic(fmt.Errorf("invalid port number: %d", listenPort))
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}
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localAddr, err := getLocalAddr()
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if err != nil {
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panic(fmt.Errorf("cannot get local address: %w", err))
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}
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fullAddress := fmt.Sprintf("http://%s:%d/", localAddr, listenPort)
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app := fiber.New(fiber.Config{
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AppName: "StaticFileServer",
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BodyLimit: 1,
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DisableStartupMessage: true,
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ReadTimeout: 5 * time.Second,
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RequestMethods: []string{"GET", "HEAD"},
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ServerHeader: "StaticFileServer",
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})
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app.Use(etag.New())
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app.Static("/", "./", fiber.Static{Browse: true})
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if qrText, err := qrtxt.Encode(fullAddress, qrtxt.Low); err == nil {
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fmt.Println(qrText)
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}
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fmt.Printf("\nListening on %s\n", fullAddress)
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wg := sync.WaitGroup{}
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wg.Add(1)
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go func() {
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defer wg.Done()
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err = app.Listen(":" + strconv.Itoa(listenPort))
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}()
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sigCh := make(chan os.Signal, 1)
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signal.Notify(sigCh, os.Interrupt, syscall.SIGTERM)
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go func() {
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<-sigCh
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_ = app.Shutdown()
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}()
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wg.Wait()
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if err != nil {
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panic(fmt.Errorf("cannot start server: %w", err))
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}
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fmt.Println("Bye!")
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}
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