I just want the tutorial

examples/tutorial/flaskr/auth.py

@@ -1,116 +0,0 @@
-import functools
-
-from flask import Blueprint
-from flask import flash
-from flask import g
-from flask import redirect
-from flask import render_template
-from flask import request
-from flask import session
-from flask import url_for
-from werkzeug.security import check_password_hash
-from werkzeug.security import generate_password_hash
-
-from .db import get_db
-
-bp = Blueprint("auth", __name__, url_prefix="/auth")
-
-
-def login_required(view):
-    """View decorator that redirects anonymous users to the login page."""
-
-    @functools.wraps(view)
-    def wrapped_view(**kwargs):
-        if g.user is None:
-            return redirect(url_for("auth.login"))
-
-        return view(**kwargs)
-
-    return wrapped_view
-
-
-@bp.before_app_request
-def load_logged_in_user():
-    """If a user id is stored in the session, load the user object from
-    the database into ``g.user``."""
-    user_id = session.get("user_id")
-
-    if user_id is None:
-        g.user = None
-    else:
-        g.user = (
-            get_db().execute("SELECT * FROM user WHERE id = ?", (user_id,)).fetchone()
-        )
-
-
-@bp.route("/register", methods=("GET", "POST"))
-def register():
-    """Register a new user.
-
-    Validates that the username is not already taken. Hashes the
-    password for security.
-    """
-    if request.method == "POST":
-        username = request.form["username"]
-        password = request.form["password"]
-        db = get_db()
-        error = None
-
-        if not username:
-            error = "Username is required."
-        elif not password:
-            error = "Password is required."
-
-        if error is None:
-            try:
-                db.execute(
-                    "INSERT INTO user (username, password) VALUES (?, ?)",
-                    (username, generate_password_hash(password)),
-                )
-                db.commit()
-            except db.IntegrityError:
-                # The username was already taken, which caused the
-                # commit to fail. Show a validation error.
-                error = f"User {username} is already registered."
-            else:
-                # Success, go to the login page.
-                return redirect(url_for("auth.login"))
-
-        flash(error)
-
-    return render_template("auth/register.html")
-
-
-@bp.route("/login", methods=("GET", "POST"))
-def login():
-    """Log in a registered user by adding the user id to the session."""
-    if request.method == "POST":
-        username = request.form["username"]
-        password = request.form["password"]
-        db = get_db()
-        error = None
-        user = db.execute(
-            "SELECT * FROM user WHERE username = ?", (username,)
-        ).fetchone()
-
-        if user is None:
-            error = "Incorrect username."
-        elif not check_password_hash(user["password"], password):
-            error = "Incorrect password."
-
-        if error is None:
-            # store the user id in a new session and return to the index
-            session.clear()
-            session["user_id"] = user["id"]
-            return redirect(url_for("index"))
-
-        flash(error)
-
-    return render_template("auth/login.html")
-
-
-@bp.route("/logout")
-def logout():
-    """Clear the current session, including the stored user id."""
-    session.clear()
-    return redirect(url_for("index"))