@app.route('/signup', methods=['GET', 'POST']) def signup(): if request.method == 'GET': uuid = session.get('uuid') datas = User.query.get(uuid) if datas: return redirect(url_for('index')) return render_template('account/register.html') elif request.method == 'POST': user = request.form.get('user') email = request.form.get('email') password = request.form.get('password') if User.query.filter(User.name == user).all(): return render_template('account/register.html', error='账号名已被注册') elif user == '' or password == '' or email == '': return render_template('account/register.html', error='输入不能为空') else: db.session.add(User(name=user, pwd=password,email=email)) db.session.commit() return redirect(url_for('login'))注释这段代码
时间: 2024-02-02 20:03:30 浏览: 41
这段代码是一个 Flask 中的视图函数,用于处理用户注册的请求。如果请求方法是 GET,它会检查用户是否已经登录,如果已经登录则直接重定向到首页,否则渲染一个名为 `register.html` 的 HTML 模板,显示注册页面。如果请求方法是 POST,它会从表单中获取用户输入的用户名、邮箱和密码,并检查用户名是否已经被注册过了。如果已经被注册过了,则重新渲染注册页面并显示错误信息。如果用户名未被注册且输入不为空,则将用户信息添加到数据库中,并重定向到登录页面。
相关问题
基于flask框架,生成一个表单验证
下面是一个基于flask框架的表单验证的示例代码:
```python
from flask import Flask, render_template, request, redirect, url_for
app = Flask(__name__)
@app.route('/')
def home():
return render_template('home.html')
@app.route('/signup', methods=['GET', 'POST'])
def signup():
if request.method == 'POST':
name = request.form['name']
email = request.form['email']
password = request.form['password']
confirm_password = request.form['confirm_password']
error = None
if not name:
error = 'Name is required.'
elif not email:
error = 'Email is required.'
elif not password:
error = 'Password is required.'
elif password != confirm_password:
error = 'Passwords do not match.'
else:
# save the user's info to the database and redirect to login page
return redirect(url_for('login'))
return render_template('signup.html', error=error)
return render_template('signup.html')
@app.route('/login', methods=['GET', 'POST'])
def login():
if request.method == 'POST':
email = request.form['email']
password = request.form['password']
error = None
if not email:
error = 'Email is required.'
elif not password:
error = 'Password is required.'
else:
# authenticate the user's login info and redirect to dashboard page
return redirect(url_for('dashboard'))
return render_template('login.html', error=error)
return render_template('login.html')
@app.route('/dashboard')
def dashboard():
return render_template('dashboard.html')
if __name__ == '__main__':
app.run(debug=True)
```
这个代码包含了一个基本的注册/登录/仪表板流程。当用户在注册页面输入表单信息并提交时,代码会验证表单是否有效。如果表单验证失败,代码会返回注册页面并显示错误消息。如果表单验证成功,代码会将用户信息保存到数据库并重定向到登录页面。
当用户在登录页面输入表单信息并提交时,代码会验证表单是否有效。如果表单验证失败,代码会返回登录页面并显示错误消息。如果表单验证成功,代码会验证用户的登录信息并重定向到仪表板页面。
注意,这个示例代码只是一个基本的框架,你需要根据你自己的需求进行修改和扩展。例如,你可能需要添加更多的表单字段、验证规则和数据库操作。
flask+mysql实现用户登录注册代码
以下是一个简单的 Flask+MySQL 实现用户登录注册的代码:
```
from flask import Flask, request, session, redirect
from flask_mysqldb import MySQL
app = Flask(__name__)
app.secret_key = 'your secret key'
mysql = MySQL(app)
app.config['MYSQL_HOST'] = 'localhost'
app.config['MYSQL_USER'] = 'your mysql username'
app.config['MYSQL_PASSWORD'] = 'your mysql password'
app.config['MYSQL_DB'] = 'your mysql database'
@app.route('/')
def index():
if 'username' in session:
return f'Hello, {session["username"]}!'
else:
return 'Please login first.'
@app.route('/signup', methods=['GET', 'POST'])
def signup():
if request.method == 'POST':
username = request.form['username']
password = request.form['password']
cur = mysql.connection.cursor()
cur.execute('INSERT INTO users(username, password) VALUES (%s, %s)', (username, password))
mysql.connection.commit()
cur.close()
session['username'] = username
return redirect('/')
else:
return '''
<form method="post">
<input type="text" name="username" placeholder="Username"/><br>
<input type="password" name="password" placeholder="Password"/><br>
<button type="submit">Signup</button>
</form>
'''
@app.route('/login', methods=['GET', 'POST'])
def login():
if request.method == 'POST':
username = request.form['username']
password = request.form['password']
cur = mysql.connection.cursor()
cur.execute('SELECT password FROM users WHERE username = %s', [username])
password_from_db = cur.fetchone()
cur.close()
if password_from_db and password_from_db[0] == password:
session['username'] = username
return redirect('/')
else:
return 'Invalid username or password.'
else:
return '''
<form method="post">
<input type="text" name="username" placeholder="Username"/><br>
<input type="password" name="password" placeholder="Password"/><br>
<button type="submit">Login</button>
</form>
'''
if __name__ == '__main__':
app.run()
```
以上代码使用 Flask 框架和 Flask-MySQLdb 扩展实现用户注册和登录功能。用户信息保存在 MySQL 数据库中,密码使用明文存储(实际应用中应使用加密后的密码)。