add nonce support with safe CSP
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parent
074fad28bd
commit
d27d29ae34
4 changed files with 68 additions and 2 deletions
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@ -19,6 +19,7 @@ services:
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volumes:
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- ./uploads:/uploads
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- ./templates:/templates
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- ./static:/static
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restart: always
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28
go/main.go
28
go/main.go
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@ -12,6 +12,8 @@ import (
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"strings"
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"sync"
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"time"
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"crypto/rand"
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"encoding/base64"
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)
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var (
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@ -25,6 +27,9 @@ func main() {
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http.HandleFunc("/upload", uploadHandler)
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http.HandleFunc("/image/", imageHandler)
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http.HandleFunc("/view/", viewHandler)
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// Statischen Dateipfad setzen
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fs := http.FileServer(http.Dir("static"))
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http.Handle("/static/", http.StripPrefix("/static/", fs))
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fmt.Println("Server listening on :8080")
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http.ListenAndServe(":8080", nil)
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@ -53,9 +58,28 @@ func homeHandler(w http.ResponseWriter, r *http.Request) {
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}
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}
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func generateNonce() (string, error) {
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nonceBytes := make([]byte, 16) // 16 Bytes generieren eine ausreichend lange Zeichenfolge für den Nonce
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if _, err := rand.Read(nonceBytes); err != nil {
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return "", err // Im Fehlerfall, geben Sie den Fehler zurück
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}
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return base64.StdEncoding.EncodeToString(nonceBytes), nil
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}
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func uploadHandler(w http.ResponseWriter, r *http.Request) {
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nonce, err := generateNonce()
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if err != nil {
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// Fehlerbehandlung, z.B. Senden eines Serverfehlers
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http.Error(w, "Serverfehler", http.StatusInternalServerError)
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log.Printf("Fehler beim Generieren des Nonce: %v", err)
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return
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}
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// Setzen der Content Security Policy
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w.Header().Set("Content-Security-Policy", "default-src 'self'; script-src 'self'; object-src 'none';")
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//w.Header().Set("Content-Security-Policy", "default-src 'self'; script-src 'self'; object-src 'none';")
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//w.Header().Set("Content-Security-Policy", fmt.Sprintf("default-src 'self'; script-src 'self' 'nonce-%s'; object-src 'none';", nonce))
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w.Header().Set("Content-Security-Policy", fmt.Sprintf("script-src 'self' 'nonce-%s';", nonce))
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mu.Lock()
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defer mu.Unlock()
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@ -139,9 +163,11 @@ func uploadHandler(w http.ResponseWriter, r *http.Request) {
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data := struct {
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Message string
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Filename string
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Nonce string
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}{
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Message: "Bild erfolgreich hochgeladen.",
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Filename: filename, // Geändert, um den möglicherweise modifizierten Dateinamen anzuzeigen
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Nonce: nonce,
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}
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err = tmpl.Execute(w, data)
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15
static/js/script.js
Normal file
15
static/js/script.js
Normal file
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@ -0,0 +1,15 @@
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document.addEventListener('DOMContentLoaded', (event) => {
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document.getElementById('copyButton').addEventListener('click', kopiereURL);
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});
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function kopiereURL() {
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var copyText = document.getElementById("imageURL");
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copyText.select();
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copyText.setSelectionRange(0, 99999); // Für mobile Geräte
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navigator.clipboard.writeText(copyText.value).then(function() {
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console.log('Kopieren in die Zwischenablage erfolgreich.');
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}, function(err) {
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console.error('Fehler beim Kopieren in die Zwischenablage: ', err);
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});
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}
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@ -5,7 +5,31 @@
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</head>
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<body>
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<p>{{.Message}}</p>
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<a href="/view/{{.Filename}}">Ihr Bild anzeigen</a>
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<!-- Anzeigen des Links zum Bild, um es zu betrachten -->
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<p><a href="/view/{{.Filename}}" target="_blank">Ihr Bild anzeigen</a></p>
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<!-- Eingabefeld mit der URL des Bildes -->
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<input type="text" value="https://pick.brothertec.eu/view/{{.Filename}}" id="imageURL" readonly>
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<!-- Button, um die URL zu kopieren -->
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<button id="copyButton">URL kopieren</button>
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<p><a href="/upload">Zurück zum Upload</a></p>
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<script src="/static/js/script.js" nonce="{{.Nonce}}"></script>
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<!-- <script type="text/javascript" nonce="{{.Nonce}}">
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function kopiereURL() {
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// Finde das Textfeld mit der URL
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var copyText = document.getElementById("imageURL");
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// Wähle den Text innerhalb des Textfeldes
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copyText.select();
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copyText.setSelectionRange(0, 99999); // Für mobile Geräte
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// Versuche, den Text ins Clipboard zu kopieren
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navigator.clipboard.writeText(copyText.value).then(function() {
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console.log('Kopieren in die Zwischenablage erfolgreich.');
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}, function(err) {
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console.error('Fehler beim Kopieren in die Zwischenablage: ', err);
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});
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}
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</script> -->
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</body>
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</html>
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