Maximilian G.
283a37638b
- Implement login and registration HTML templates for user authentication. - Create user management functions in user.py for handling user data, including adding, deleting, and updating users. - Introduce password hashing and strength checking for secure user credentials. - Add terms of service and privacy policy pages to the website. - Enhance main page with dynamic content based on user session status.
473 lines
17 KiB
Python
473 lines
17 KiB
Python
from flask_jwt_extended import JWTManager, create_access_token, jwt_required
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from flask import Flask, render_template, request, jsonify, flash, redirect, url_for, get_flashed_messages, session
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import os
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import json
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import calendar
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from datetime import timedelta, datetime, date
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from pathlib import Path
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from functools import wraps
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from werkzeug.security import generate_password_hash, check_password_hash
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import bleach
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from markupsafe import escape
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app = Flask(__name__)
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app.secret_key = "ASDfhbsdfseiufhgildsrfrjg874368546987s6e8468f4s"
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app.config["JWT_SECRET_KEY"] = os.environ.get("JWT_SECRET_KEY", app.secret_key)
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app.config["JWT_ACCESS_TOKEN_EXPIRES"] = timedelta(hours=12)
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app.config["SESSION_COOKIE_HTTPONLY"] = True
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app.config["SESSION_COOKIE_SAMESITE"] = "Strict"
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app.config["SESSION_COOKIE_SECURE"] = os.environ.get("SESSION_COOKIE_SECURE", "0") == "1"
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app.config["PREFERRED_URL_SCHEME"] = "https" if os.environ.get("SESSION_COOKIE_SECURE") == "1" else "http"
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jwt = JWTManager(app)
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@app.after_request
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def set_security_headers(response):
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response.headers["X-Content-Type-Options"] = "nosniff"
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response.headers["X-Frame-Options"] = "SAMEORIGIN"
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response.headers["X-XSS-Protection"] = "1; mode=block"
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response.headers["Strict-Transport-Security"] = "max-age=31536000; includeSubDomains"
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response.headers["Content-Security-Policy"] = "default-src 'self'; script-src 'self' 'unsafe-inline' https://fonts.googleapis.com https://cdn.jsdelivr.net; style-src 'self' 'unsafe-inline' https://fonts.googleapis.com; font-src 'self' https://fonts.gstatic.com https://fonts.googleapis.com; img-src 'self' data:; connect-src 'self';"
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return response
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BASE_DIR = Path(__file__).resolve().parent
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DATA_DIR = BASE_DIR / "data"
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USERS_FILE = DATA_DIR / "users.json"
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APPOINTMENTS_FILE = DATA_DIR / "appointments.json"
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POSTS_FILE = DATA_DIR / "posts.json"
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def _issue_access_token() -> str:
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return create_access_token(identity="license-validation-client")
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def _ensure_data_files() -> None:
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DATA_DIR.mkdir(parents=True, exist_ok=True)
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if not USERS_FILE.exists():
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USERS_FILE.write_text("[]", encoding="utf-8")
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if not APPOINTMENTS_FILE.exists():
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APPOINTMENTS_FILE.write_text("[]", encoding="utf-8")
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if not POSTS_FILE.exists():
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POSTS_FILE.write_text("[]", encoding="utf-8")
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def _read_json(file_path: Path) -> list:
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_ensure_data_files()
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try:
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return json.loads(file_path.read_text(encoding="utf-8"))
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except (json.JSONDecodeError, OSError):
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return []
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def _write_json(file_path: Path, payload: list) -> None:
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_ensure_data_files()
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file_path.write_text(json.dumps(payload, indent=2, ensure_ascii=True), encoding="utf-8")
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def _sanitize_text(text: str, max_length: int = 255) -> str:
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"""Sanitize user text input: strip, limit length, and escape HTML."""
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text = (text or "").strip()
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if len(text) > max_length:
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text = text[:max_length]
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return text
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def _sanitize_html(html_content: str, max_length: int = 50000) -> str:
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"""Sanitize HTML content: allow safe tags only."""
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if not html_content:
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return ""
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html_content = html_content[:max_length]
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allowed_tags = ["p", "br", "strong", "em", "u", "h1", "h2", "h3", "h4", "h5", "h6", "ul", "ol", "li", "a", "blockquote", "code", "pre"]
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allowed_attrs = {"a": ["href", "title"]}
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return bleach.clean(html_content, tags=allowed_tags, attributes=allowed_attrs, strip=True)
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def _validate_username(username: str) -> bool:
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"""Validate username format: alphanumeric, underscore, dash, 3-30 chars."""
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if not username or not isinstance(username, str):
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return False
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username = username.strip()
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if len(username) < 3 or len(username) > 30:
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return False
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return all(c.isalnum() or c in "_-" for c in username)
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def _find_user(username: str):
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username_key = (username or "").strip().lower()
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if not username_key:
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return None
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users = _read_json(USERS_FILE)
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for entry in users:
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if entry.get("username", "").lower() == username_key:
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return entry
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return None
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def login_required(view_func):
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@wraps(view_func)
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def wrapped(*args, **kwargs):
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if "username" not in session:
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flash("Bitte zuerst einloggen.", "error")
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return redirect(url_for("login"))
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return view_func(*args, **kwargs)
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return wrapped
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def admin_required(view_func):
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@wraps(view_func)
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def wrapped(*args, **kwargs):
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if "username" not in session:
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flash("Bitte zuerst einloggen.", "error")
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return redirect(url_for("login"))
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current_user = _find_user(session.get("username"))
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if not current_user or not current_user.get("is_admin", False):
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flash("Zugriff verweigert. Admin-Rechte erforderlich.", "error")
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return redirect(url_for("default"))
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return view_func(*args, **kwargs)
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return wrapped
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"""-----------------------------------------------------------------------------------------------------------------"""
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@app.route("/", methods=["GET", "POST"])
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def default():
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return render_template("main.html")
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@app.route('/login', methods=['GET', 'POST'])
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def login():
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if 'username' in session:
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return redirect(url_for('default'))
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if request.method == 'POST':
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data = request.get_json(silent=True) or {}
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username = (data.get("username") or request.form.get('username') or "").strip()
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password = data.get("password") or request.form.get('password') or ""
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if not username or not password:
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if request.is_json:
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return jsonify({"error": "Missing login data"}), 400
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flash('Bitte Benutzername und Passwort eingeben.', 'error')
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return redirect(url_for('login'))
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stored_user = _find_user(username)
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if stored_user and check_password_hash(stored_user.get("password_hash", ""), password):
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session['username'] = stored_user.get("username")
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session['display_name'] = stored_user.get("display_name") or stored_user.get("username")
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session['is_admin'] = stored_user.get("is_admin", False)
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session['access_token'] = _issue_access_token()
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if request.is_json:
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return jsonify({"access_token": session['access_token'], "token_type": "Bearer"}), 200
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return redirect(url_for('default'))
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if request.is_json:
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return jsonify({"error": "Invalid credentials"}), 401
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flash('Login fehlgeschlagen. Bitte pruefen Sie Ihre Eingaben.', 'error')
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get_flashed_messages()
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return render_template('login.html')
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@app.route("/register", methods=["GET", "POST"])
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def register():
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if request.method == "POST":
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username = (request.form.get("username") or "").strip()
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display_name = (request.form.get("display_name") or "").strip()
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password = request.form.get("password") or ""
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password_repeat = request.form.get("password_repeat") or ""
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if not username or not display_name or not password or not password_repeat:
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flash("Bitte alle Felder ausfuellen.", "error")
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return redirect(url_for("register"))
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if not _validate_username(username):
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flash("Benutzername muss 3-30 Zeichen lang sein und nur Buchstaben, Zahlen, - und _ enthalten.", "error")
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return redirect(url_for("register"))
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if len(password) < 8:
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flash("Das Passwort muss mindestens 8 Zeichen haben.", "error")
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return redirect(url_for("register"))
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if password != password_repeat:
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flash("Die Passwoerter stimmen nicht ueberein.", "error")
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return redirect(url_for("register"))
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if _find_user(username):
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flash("Benutzername bereits vergeben.", "error")
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return redirect(url_for("register"))
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display_name = _sanitize_text(display_name, 100)
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users = _read_json(USERS_FILE)
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is_admin = len(users) == 0
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users.append(
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{
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"username": username,
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"display_name": display_name,
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"password_hash": generate_password_hash(password),
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"is_admin": is_admin,
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"created_at": datetime.utcnow().isoformat(timespec="seconds") + "Z",
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}
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)
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_write_json(USERS_FILE, users)
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flash("Registrierung erfolgreich. Bitte jetzt einloggen.", "success")
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return redirect(url_for("login"))
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return render_template("register.html")
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@app.route('/appointments', methods=['GET', 'POST'])
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@login_required
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def appointments():
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today = date.today()
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month = request.args.get("month", type=int) or today.month
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year = request.args.get("year", type=int) or today.year
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month = 1 if month < 1 else 12 if month > 12 else month
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year = 1970 if year < 1970 else year
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if request.method == 'POST':
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selected_date = (request.form.get("selected_date") or "").strip()
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appointment_time = (request.form.get("appointment_time") or "").strip()
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subject = (request.form.get("subject") or "").strip()
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note = (request.form.get("note") or "").strip()
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try:
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date.fromisoformat(selected_date)
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except ValueError:
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flash("Bitte einen gueltigen Termin im Kalender auswaehlen.", "error")
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return redirect(url_for("appointments", month=month, year=year))
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if not appointment_time or not subject:
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flash("Bitte Uhrzeit und Betreff ausfuellen.", "error")
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return redirect(url_for("appointments", month=month, year=year))
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subject = _sanitize_text(subject, 200)
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note = _sanitize_text(note, 2000)
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entries = _read_json(APPOINTMENTS_FILE)
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entries.append(
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{
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"id": f"a-{int(datetime.utcnow().timestamp() * 1000)}",
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"username": session.get("username"),
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"display_name": session.get("display_name"),
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"date": selected_date,
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"time": appointment_time,
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"subject": subject,
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"note": note,
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"status": "Angefragt",
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"created_at": datetime.utcnow().isoformat(timespec="seconds") + "Z",
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}
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)
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_write_json(APPOINTMENTS_FILE, entries)
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flash("Termin erfolgreich angefragt.", "success")
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selected = date.fromisoformat(selected_date)
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return redirect(url_for("appointments", month=selected.month, year=selected.year))
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cal = calendar.Calendar(firstweekday=0)
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month_grid = cal.monthdayscalendar(year, month)
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month_name = calendar.month_name[month]
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previous_month = month - 1
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previous_year = year
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if previous_month == 0:
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previous_month = 12
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previous_year -= 1
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next_month = month + 1
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next_year = year
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if next_month == 13:
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next_month = 1
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next_year += 1
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all_appointments = _read_json(APPOINTMENTS_FILE)
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user_appointments = [item for item in all_appointments if item.get("username") == session.get("username")]
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user_appointments.sort(key=lambda item: (item.get("date", ""), item.get("time", "")), reverse=False)
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return render_template(
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"appointments.html",
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month=month,
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month_name=month_name,
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year=year,
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month_grid=month_grid,
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today_iso=today.isoformat(),
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previous_month=previous_month,
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previous_year=previous_year,
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next_month=next_month,
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next_year=next_year,
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user_appointments=user_appointments,
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)
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@app.route('/admin/dashboard')
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@admin_required
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def admin_dashboard():
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all_appointments = _read_json(APPOINTMENTS_FILE)
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all_appointments.sort(key=lambda x: (x.get("date", ""), x.get("time", "")), reverse=True)
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status_counts = {
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"Angefragt": len([a for a in all_appointments if a.get("status") == "Angefragt"]),
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"Bestaetigt": len([a for a in all_appointments if a.get("status") == "Bestaetigt"]),
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"Abgelehnt": len([a for a in all_appointments if a.get("status") == "Abgelehnt"]),
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}
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posts = _read_json(POSTS_FILE)
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total_posts = len(posts)
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return render_template(
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"admin_dashboard.html",
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appointments=all_appointments,
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status_counts=status_counts,
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total_posts=total_posts,
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)
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@app.route('/admin/appointment/<appointment_id>', methods=['POST'])
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@admin_required
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def update_appointment(appointment_id):
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action = request.form.get("action", "").strip()
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response_text = _sanitize_text(request.form.get("response") or "", 5000)
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if action not in ["confirm", "reject"]:
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flash("Ungueltige Aktion.", "error")
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return redirect(url_for("admin_dashboard"))
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all_appointments = _read_json(APPOINTMENTS_FILE)
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appointment = None
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for item in all_appointments:
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if item.get("id") == appointment_id:
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appointment = item
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break
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if not appointment:
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flash("Termin nicht gefunden.", "error")
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return redirect(url_for("admin_dashboard"))
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if action == "confirm":
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appointment["status"] = "Bestaetigt"
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else:
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appointment["status"] = "Abgelehnt"
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appointment["response"] = response_text
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appointment["responded_at"] = datetime.utcnow().isoformat(timespec="seconds") + "Z"
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appointment["responded_by"] = session.get("username")
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_write_json(APPOINTMENTS_FILE, all_appointments)
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flash(f"Termin wurde {('bestaetigt' if action == 'confirm' else 'abgelehnt')}.", "success")
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return redirect(url_for("admin_dashboard"))
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@app.route('/admin/blog', methods=['GET', 'POST'])
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@admin_required
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def admin_blog():
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if request.method == 'POST':
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action = request.form.get("action", "").strip()
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if action == "create":
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title = _sanitize_text(request.form.get("title") or "", 200)
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content = _sanitize_html(request.form.get("content") or "", 50000)
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excerpt = _sanitize_text(request.form.get("excerpt") or "", 500)
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if not title or not content:
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flash("Bitte Titel und inhalt ausfuellen.", "error")
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return redirect(url_for("admin_blog"))
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posts = _read_json(POSTS_FILE)
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posts.append({
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"id": f"p-{int(datetime.utcnow().timestamp() * 1000)}",
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"title": title,
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"excerpt": excerpt or (content[:150] + "...") if len(content) > 150 else content,
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"content": content,
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"author": session.get("username"),
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"created_at": datetime.utcnow().isoformat(timespec="seconds") + "Z",
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"published": True,
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})
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_write_json(POSTS_FILE, posts)
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flash("Beitrag veroeffentlicht.", "success")
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return redirect(url_for("admin_blog"))
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elif action == "delete":
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post_id = (request.form.get("post_id") or "").strip()
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if not post_id or not post_id.startswith("p-"):
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flash("Ungueltige Beitrag-ID.", "error")
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return redirect(url_for("admin_blog"))
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posts = _read_json(POSTS_FILE)
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original_count = len(posts)
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posts = [p for p in posts if p.get("id") != post_id]
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if len(posts) == original_count:
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flash("Beitrag nicht gefunden.", "error")
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return redirect(url_for("admin_blog"))
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_write_json(POSTS_FILE, posts)
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flash("Beitrag geloescht.", "success")
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return redirect(url_for("admin_blog"))
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posts = _read_json(POSTS_FILE)
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posts.sort(key=lambda x: x.get("created_at", ""), reverse=True)
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return render_template("admin_blog.html", posts=posts)
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@app.route('/blog')
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def blog():
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posts = _read_json(POSTS_FILE)
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posts.sort(key=lambda x: x.get("created_at", ""), reverse=True)
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return render_template("blog.html", posts=posts)
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@app.route('/blog/<post_id>')
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def blog_post(post_id):
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if not post_id or not post_id.startswith("p-"):
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flash("Ungueltige Beitrag-ID.", "error")
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return redirect(url_for("blog"))
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posts = _read_json(POSTS_FILE)
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post = None
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for p in posts:
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if p.get("id") == post_id:
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post = p
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break
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if not post:
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flash("Beitrag nicht gefunden.", "error")
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return redirect(url_for("blog"))
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return render_template("blog_post.html", post=post)
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@app.route('/datenschutz')
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def datenschutz():
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return render_template("datenschutz.html")
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@app.route('/impressum')
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def impressum():
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return render_template("impressum.html")
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@app.route('/nutzungsbedingungen')
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def nutzungsbedingungen():
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return render_template("nutzungsbedingungen.html")
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@app.route('/logout')
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def logout():
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session.pop('username', None)
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session.pop('display_name', None)
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session.pop('is_admin', None)
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session.pop('access_token', None)
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flash('Logged out successfully', 'info')
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return redirect(url_for('login'))
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def main():
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app.run(host="0.0.0.0", port=4999, debug=False)
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if __name__ == "__main__":
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main() |