Flask-login不能登录

Question

我正在制作一个基于文本的浏览器游戏，但我的登录脚本有问题。当我登录的时候什么也没有发生，它甚至没有重定向。

下面是我的代码：

from flask import Flask,render_template,redirect,request,url_for,session
from flask_login import LoginManager, current_user, login_user, login_required
# this contains the configuration and the database connection
from config import users, stats, register_user
from werkzeug.security import check_password_hash
# load the user model
from user import User


version = 2.00
app = Flask(__name__)
login_manager = LoginManager()
login_manager.init_app(app)
login_manager.login_view = 'login'
app.config['SECRET_KEY'] = "lkajdghdadkglajkgah"

#the user loader callback
@login_manager.user_loader
def load_user(user_id):
    u = users.find_one({"_id": user_id})
    if not u:
        return None
    return User(u['_id'])

@app.route('/')
def main():
    if current_user.is_authenticated:
        return redirect("/game/", code=302)
    else:
        return redirect("/login/", code=302)

@app.route('/login/', methods=['GET','POST'])
def login():
    if current_user.is_authenticated:
        return redirect("/game/", code=302)

    # when the form is filled in
    if request.method == 'POST':
        try:
            # login user
            if request.form['logSubmit'] == 'logSubmit':
                username = request.form['logUser']
                password = request.form['logPassword']
                result = users.find_one({"user": username})

                if result and check_password_hash(result['password_hash'], password):
                    resid = result['_id']
                    print(resid)
                    user_obj = User(resid)
                    login_user(user_obj)
                    return redirect(request.args.get("next") or url_for("game"))

        except KeyError:
            # register the user
            if request.form['regSubmit'] == 'regSubmit':
                username = request.form['regUser']
                password = request.form['regPassword']
                address = request.form['regAddress']
                register_user(username=username,password=password,address=address)
                print(address)
                return redirect("/login/", code=302)

    return render_template('out.html')

@app.route('/game/')
@login_required
def game():
    return render_template('game.html')

@app.route('/logout')
def logout():
    logout_user()
    return redirect("/login/", code=302)

下面是我的user类：

class User():

    def __init__(self,id):
        self.id = id
        self.email = None
        print (str(id)+" has logged in.")

    #def getStats(self):
        #get the statistics of the user from the database
        #return "your getStats() is still under construction"
    @property
    def is_authenticated(self):
        return True

    @property
    def is_active(self):
        return True

    @property
    def is_anonymous(self):
        return False

    def get_id(self):
        return str(self.id)

我现在正在寻找解决方案的几个小时，我已经阅读了flask-login的整个文档，但我无法弄明白。

请帮帮我。

编辑:我删除了旧代码并添加了新代码，但它仍然不起作用。

Answer 1

我会给你我的工作登录代码，其中使用Flask-login和Flask-WTF。

查看功能：

@app.route("/login", methods=["GET","POST"])
def login():
    form = LoginForm()
    if form.validate_on_submit():
        user = User.get_by_username(form.username.data)
        if user is not None:
            login_user(user, form.remember_me.data)
            flash("logged in successfully as {}".format(user.username))
            return redirect(request.args.get('next') or url_for('index'))
        flash("Incorrect username or password")
    return render_template("login.html", form=form)

登录表单：

from flask_wtf import FlaskForm 
from wtforms.fields import StringField, PasswordField, BooleanField,           SubmitField
from wtforms.validators import DataRequired, url, Length, Email, Regexp,     EqualTo, ValidationError

from models import User    
class LoginForm(FlaskForm):
    username = StringField('Your Username: ', validators=[DataRequired()])
    password = PasswordField('password', validators=[DataRequired()])
    remember_me = BooleanField("Keep me logged in")
    submit = SubmitField('Log In')

用户模型：

class User(db.Model, UserMixin):
    id = db.Column(db.Integer, primary_key=True)
    username = db.Column(db.String(80), unique=True)
    email = db.Column(db.String(120), unique=True)
    password_hash = db.Column(db.String(80))

您可以在自己的代码中实现该代码，看看它是否能解决您的问题

Answer 2

实现登录的一种更简单的方法是使用Flask-WTF，它为您处理大部分表单处理。此外，在您的User模型中，应该继承Flask-Login的UserMixin类，该类提供了用户方法和属性的默认实现。