Delete app.py

app.py

@@ -1,134 +0,0 @@
-"""
-Flask Login System with SQLite (Secure Version)
-Features:
-- Signup (with password hashing)
-- Login (with secure password check)
-- Session (login state management)
-- Cookies (store last visit info securely)
-- "Remember Me" option
-- Flash messages for better UX
-"""
-
-from flask import Flask, render_template, request, redirect, url_for, session, make_response, flash
-import sqlite3
-from datetime import timedelta
-from werkzeug.security import generate_password_hash, check_password_hash
-
-# Flask App Setup
-app = Flask(__name__)
-
-# Secret key is used to sign session data (must be kept secret in real apps!)
-app.secret_key = "supersecretkey"
-
-# Permanent sessions last for 7 days (used when "Remember Me" is checked)
-app.permanent_session_lifetime = timedelta(days=7)
-
-
-# Helper function to connect to SQLite database
-def get_db_connection():
-    conn = sqlite3.connect("users.db")
-    conn.row_factory = sqlite3.Row  # Makes rows behave like dictionaries
-    return conn
-
-
-# Initialize database with a "users" table
-def init_db():
-    with get_db_connection() as conn:
-        conn.execute("""
-            CREATE TABLE IF NOT EXISTS users (
-                id INTEGER PRIMARY KEY AUTOINCREMENT,
-                username TEXT UNIQUE NOT NULL,
-                password TEXT NOT NULL
-            )
-        """)
-        conn.commit()
-
-# Call database initialization at startup
-init_db()
-
-
-# Home Page (only logged-in users can see this)
-@app.route("/")
-def home():
-    if "username" in session:
-        username = session["username"]
-        last_visit = request.cookies.get("last_visit", "First time visiting!")
-        return render_template("home.html", username=username, last_visit=last_visit)
-
-    return redirect(url_for("login"))
-
-
-# Signup Page
-@app.route("/signup", methods=["GET", "POST"])
-def signup():
-    if request.method == "POST":
-        username = request.form["username"]
-        password = request.form["password"]
-
-        hashed_password = generate_password_hash(password, method="sha256")
-
-        try:
-            with get_db_connection() as conn:
-                conn.execute(
-                    "INSERT INTO users (username, password) VALUES (?, ?)",
-                    (username, hashed_password)
-                )
-                conn.commit()
-
-            flash("Signup successful! Please login.", "success")
-            return redirect(url_for("login"))
-
-        except sqlite3.IntegrityError:
-            flash("Username already exists! Try another.", "danger")
-            return redirect(url_for("signup"))
-
-    return render_template("signup.html")
-
-
-# Login Page
-@app.route("/login", methods=["GET", "POST"])
-def login():
-    if request.method == "POST":
-        username = request.form["username"]
-        password = request.form["password"]
-        remember = request.form.get("remember")
-
-        with get_db_connection() as conn:
-            user = conn.execute("SELECT * FROM users WHERE username=?", (username,)).fetchone()
-
-        if user and check_password_hash(user["password"], password):
-            session["username"] = username
-            session.permanent = True if remember == "on" else False
-
-            resp = make_response(redirect(url_for("home")))
-            resp.set_cookie(
-                "last_visit",
-                "Welcome back, " + username,
-                max_age=(7*24*60*60 if remember == "on" else None),
-                httponly=True,
-                secure=False,  # ❗set True in production (requires HTTPS)
-                samesite="Lax"
-            )
-
-            flash("Login successful!", "success")
-            return resp
-        else:
-            flash("Invalid username or password.", "danger")
-            return redirect(url_for("login"))
-
-    return render_template("login.html")
-
-
-# Logout Page
-@app.route("/logout")
-def logout():
-    session.pop("username", None)
-    resp = make_response(redirect(url_for("login")))
-    resp.set_cookie("last_visit", "", expires=0)
-    flash("You have been logged out.", "info")
-    return resp
-
-
-# Run the App
-if __name__ == "__main__":
-    app.run(debug=True, host="0.0.0.0", port=5000)