[英]Flask check_password always return false
如果用戶單擊登錄,我在主頁上為用戶創建登錄名,然后登錄頁面顯示在那里,如果電子郵件 ID 和密碼正確,則用戶輸入電子郵件 ID 和密碼,然后我將用戶重定向到主頁。 現在的問題是用戶登錄的密碼是否錯誤或正確,另一個問題是如果我打印user.check_password(form.password.data)
那么它會返回 false。 我不明白問題是什么。 我有 config.json 並在那里定義了參數,所以不用擔心。 set_password(self, password)
工作完美並存儲在數據庫中,除了檢查密碼外一切都很好。 這是我的python代碼。
local_server=True
app=Flask(__name__)
app.secret_key='supper-secret-key'
login_manager=LoginManager(app)
login_manager.init_app(app)
login_manager.session_protection="strong"
db = SQLAlchemy(app)
class Users(UserMixin, db.Model):
__tablename__='users'
user_id=db.Column(db.Integer, primary_key=True)
first_name=db.Column(db.String(80), nullable=False)
last_name=db.Column(db.String(80), nullable=False)
email=db.Column(db.String(80), nullable=False)
password_hash=db.Column(db.String(255), nullable=False)
def get_id(self):
return self.user_id
def set_password(self, password):
self.password_hash = generate_password_hash(password)
def check_password(self, password):
return check_password_hash(self.password_hash, password)
class LoginForm(FlaskForm):
email=StringField('email', validators=[DataRequired()])
password=PasswordField('password', validators=[DataRequired()])
remember_me=BooleanField('Remember me')
submit=SubmitField('login')
@login_manager.user_loader
def load_user(user_id):
return Users.query.get(int(user_id))
@app.route("/")
def home():
return render_template("index.html", params=params)
def is_safe_url(target):
ref_url=urlparse(request.host_url, target)
test_url = urlparse(urljoin(request.host_url,target))
return test_url.scheme in ('http','https') and \
ref_url.netloc==test_url.netloc
@app.route("/login", methods=['POST','GET'])
def login():
if current_user.is_authenticated:
return render_template('index.html',params=params)
form=LoginForm()
if form.validate_on_submit():
user=Users.query.filter_by(email=form.email.data).first()
user.check_password(form.password.data)
if not user:
flash('Please check login details and try again','danger')
return redirect(url_for('login'))
print(user.check_password(form.password.data)) #False
flash('Successfully logged in','success')
login_user(user, remember=form.remember_me.data)
next=flask.request.args.get('next')
if not is_safe_url(next):
return flask.abort(400)
return flask.redirect(next or flask.url_for('home'))
return render_template("login.html", params=params, form=form)
@app.route("/logout")
def logout():
logout_user()
flash('You were logged out','warning')
return redirect(url_for('home'))
@app.route("/register")
def register():
if current_user.is_authenticated:
return render_template('index.html',params=params)
return render_template('register.html',params=params)
@app.route("/register", methods=['GET', 'POST'])
def register_post():
first_name = request.form.get('fname')
last_name = request.form.get('lname')
email = request.form.get('email')
password= request.form.get('password')
password2=request.form.get('cpassword')
if (password!=password2):
flash('Password must be same','danger')
return render_template('register.html', params=params)
users=Users.query.filter_by(email=email).first()
if users:
flash('Email address already exists','warning')
return redirect(url_for('register'))
new_user=Users(first_name=first_name,last_name=last_name,email=email)
new_user.set_password(password)
db.session.add(new_user)
db.session.commit()
return redirect(url_for('login'))
app.run(debug=True)
我還有一個錯誤如果我輸入了錯誤的電子郵件 ID,那么錯誤是AttributeError: 'NoneType' object has no attribute 'check_password'
這里是完整的錯誤代碼
File "C:\Python38\Lib\site-packages\flask\app.py", line 2464, in __call__
return self.wsgi_app(environ, start_response)
File "C:\Python38\Lib\site-packages\flask\app.py", line 2450, in wsgi_app
response = self.handle_exception(e)
File "C:\Python38\Lib\site-packages\flask\app.py", line 1867, in handle_exception
reraise(exc_type, exc_value, tb)
File "C:\Python38\Lib\site-packages\flask\_compat.py", line 39, in reraise
raise value
File "C:\Python38\Lib\site-packages\flask\app.py", line 2447, in wsgi_app
response = self.full_dispatch_request()
File "C:\Python38\Lib\site-packages\flask\app.py", line 1952, in full_dispatch_request
rv = self.handle_user_exception(e)
File "C:\Python38\Lib\site-packages\flask\app.py", line 1821, in handle_user_exception
reraise(exc_type, exc_value, tb)
File "C:\Python38\Lib\site-packages\flask\_compat.py", line 39, in reraise
raise value
File "C:\Python38\Lib\site-packages\flask\app.py", line 1950, in full_dispatch_request
rv = self.dispatch_request()
File "C:\Python38\Lib\site-packages\flask\app.py", line 1936, in dispatch_request
return self.view_functions[rule.endpoint](**req.view_args)
File "D:\tuts\PythonFlask\ThirdFlask.py", line 134, in login
user.check_password(form.password.data)
AttributeError: 'NoneType' object has no attribute 'check_password'
這是 login.html 的代碼
{% extends "layout.html" %}
{% block body %}
<form method="POST" action="/login">
<div class="overlay"></div>
<div class="container">
<div class="row">
<div class="card" style="margin: auto; margin-top: 100px; width: 25rem;">
<!--message flashing started here-->
{% with messages = get_flashed_messages(with_categories=true) %}
{% if messages%}
{% for category,message in messages%}
<div class="alert alert-{{category}} alert-dismissible fade show" role="alert">
{{message}}
<button type="button" class="close" data-dismiss="alert" aria-label="Close">
<span aria-hidden="true">×</span>
</button>
</div>
{% endfor %}
{% endif %}
{% endwith %}
<div class="card-body">
<form class="form" method="POST" action="/login">
{{ form.csrf_token }}
{{ form.name }}
<label>Email</label><br>
<input type="email" class="form-control" name="email" placeholder="email" required><br>
<label>Password</label><br>
<input type="password" class="form-control" name="password" placeholder="password" required><br><br>
<div class="checkbox mb-3">
<label>
<input type="checkbox" value="remember_me"> Remember me
</label>
</div>
<input type="submit" class="btn btn-primary btn-block btn-lg" value="login">
</form>
<p>Not a member? <a href="/register">Create Account</a></p>
</div>
</div>
</div>
</div>
<!-- Main Content -->
{% endblock %}
幫我解決這個問題,提前致謝:)
您需要重新排列:
@app.route("/login", methods=['POST','GET'])
def login():
if current_user.is_authenticated:
return render_template('index.html',params=params)
form=LoginForm()
if form.validate_on_submit():
user=Users.query.filter_by(email=form.email.data).first()
# dont check password if user with that email does not exist
if not user:
flash('Please check login details and try again','danger')
return redirect(url_for('login'))
if user.check_password(form.password.data):
flash('Successfully logged in','success')
login_user(user, remember=form.remember_me.data)
next=flask.request.args.get('next')
if not is_safe_url(next):
return flask.abort(400)
return flask.redirect(next or flask.url_for('home'))
else:
flash('incorrect password','fail')
return render_template("login.html", params=params, form=form)
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