forms.py
import wtforms
from wtforms.validators import length,email
# 登录的验证器
class LoginForm(wtforms.Form):
email = wtforms.StringField(validators=[length(min=5,max=20),email()])
password = wtforms.StringField(validators=[length(min=6,max=20)])
login.html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>登录</title>
</head>
<body>
<form action="/login" method="post">
<tbody>
<tr>
<td>邮箱:</td>
<td><input type="text" name="email"></td>
</tr>
<tr>
<td>密码:</td>
<td><input type="text" name="password"></td>
</tr>
<tr>
<td><button>登录</button></td>
<td></td>
</tr>
</tbody>
</form>
</body>
</html>
app.py
from flask import Flask,request,render_template
from forms import LoginForm
app = Flask(__name__)
@app.route('/')
def hello_world(): # put application's code here
return 'Hello World!'
@app.route('/login',methods=['GET','POST'])
def login():
if request.method == 'GET':
return render_template('login.html')
else:
form = LoginForm(request.form)
if form.validate():
return '登录成功'
else:
return "邮箱或密码错误!"
if __name__ == '__main__':
app.run()