Replace PyQRCode with qrcode

qrcode is more common and better maintained

Signed-off-by: Felix Kaechele <felix@kaechele.ca>

app/views.py

@@ -8,7 +8,8 @@ from functools import wraps
 from io import BytesIO
 
 import jinja2
-import pyqrcode
+import qrcode as qrc
+import qrcode.image.svg as qrc_svg
 from flask import g, request, make_response, jsonify, render_template, session, redirect, url_for, send_from_directory, abort
 from flask_login import login_user, logout_user, current_user, login_required
 from werkzeug import secure_filename
@@ -712,9 +713,9 @@ def qrcode():
         return redirect(url_for('index'))
 
     # render qrcode for FreeTOTP
-    url = pyqrcode.create(current_user.get_totp_uri())
+    img = qrc.make(current_user.get_totp_uri(), image_factory=qrc_svg.SvgImage)
     stream = BytesIO()
-    url.svg(stream, scale=3)
+    img.save(stream)
     return stream.getvalue(), 200, {
         'Content-Type': 'image/svg+xml',
         'Cache-Control': 'no-cache, no-store, must-revalidate',