Flask-login 例子

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from flask.ext.login import LoginManager, login_required, UserMixin, login_user, logout_user, current_user

from flask import session,g

@app.before_request

def before_request():

g.user = current_user

app.secret_key = 's3cr3t'

login_manager = LoginManager()

login_manager.session_protection = 'strong'

login_manager.login_view = 'xlogin'

login_manager.init_app(app)

class User(UserMixin):

@property

def is_authenticated(self):

return True

@property

def is_actice(self):

return True

@property

def is_anonymous(self):

return False

def get_id(self):

return "100"

@login_manager.user_loader

def load_user(user_id):

user = User()

return user

@app.route('/xlogin', methods=['GET', 'POST'])

def xlogin():

if g.user is not None and g.user.is_authenticated:

return redirect(url_for('index'))

form = LoginForm2()

if form.validate_on_submit():

flash('%s  %s  %s' %(form.username.data, form.password.data, form.remember_me.data))

if form.username.data == "sysnap" and form.password.data == "sysnap":

user = User()

login_user(user)

return redirect('/index')

return render_template('loginform.html',

title='login',

form=form)

@app.route('/xlogout', methods=['GET', 'POST'])

def xlogout():

logout_user()

return "logout page"

@app.route('/xtest')

@login_required

def xtest():

return "yes , you are allowed"

form定义为

class LoginForm2(Form):

username = StringField('name', validators=[DataRequired()])

password = PasswordField('password', validators=[validators.Required()])

remember_me = BooleanField('remember', default=False)

submit = SubmitField('Submit')

HTML

<!-- extend from base layout -->

{% extends "base.html" %}

{% block content %}

<h1>{{title}}</h1>

<form action="" method="post" name="loginform">

{{ form.hidden_tag() }}

<p>

{{ form.username.label }} {{ form.username() }}

{% for error in form.username.errors %}

<span style="color: red;">[{{ error }}]</span>

{% endfor %}

</p>

<p>

{{ form.password.label }} {{ form.password() }}

{% for error in form.password.errors %}

<span style="color: red;">[{{ error }}]</span>

{% endfor %}

</p>

<p>{{ form.remember_me }} remember</p>

{% for error in form.remember_me.errors %}

<span style="color: red;">[{{ error }}]</span>

{% endfor %}<br>

<p>

{{ form.submit() }}

</p>

</form>

{% endblock %}