python + flask 中 session的标准用法

admin   ·   发表于 2个月前   ·   python

 

Sessions

我们可以使用全局对象session来管理用户会话。Sesison 是建立在 Cookie 技术上的,不过在 Flask 中,我们还可以为 Session 指定密钥,这样存储在 Cookie 中的信息就会被加密,从而更加安全。直接看 Flask 官方的例子吧。

from flask import Flask, session, redirect, url_for, escape, request

app = Flask(__name__)

@app.route('/')
def index():
    if 'username' in session:
        return 'Logged in as %s' % escape(session['username'])
    return 'You are not logged in'

@app.route('/login', methods=['GET', 'POST'])
def login():
    if request.method == 'POST':
        session['username'] = request.form['username']
        return redirect(url_for('index'))
    return '''
        <form method="post">
            <p><input type=text name=username>
            <p><input type=submit value=Login>
        </form>
    '''

@app.route('/logout')
def logout():
    # remove the username from the session if it's there
    session.pop('username', None)
    return redirect(url_for('index'))

# set the secret key.  keep this really secret:
app.secret_key = 'A0Zr98j/3yX R~XHH!jmN]LWX/,?RT'

 

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