flask消息提示之flash

发表于 | 分类于

在登录界面时候出现提示性做用

Flask request render_template,flash,abort

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
from flask import Flask,request,render_template,flash,abort
from flask import url_for
app=Flask(__name__)
app.secret_key='123sdfasdff'
#secret_key是进行消息加密
@app.route('/login',methods=['POST'])
def login_url():
	form=request.form
	username=form.get('username')
	password=form.get('password')
	
	if not username:
		flash('请输入用户名')
		return render_template('index.html')
	if not password:
		flash('请输入用户密码')
		return render_template('index.html')
	if username=='nuocheng' and password='123456'
		flash('登陆成功')
		return render_template('index.html')
	else:
		flash('用户名或者密码错误')
		return render_template('index.html')

其中index.html里的代码：

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
{{content}}
<form action="/login" method="post">
    <input type="text" name="username">
    <input type="password" name="password">
    <input type="submit" value="Submit">
</form>
{{get_flashed_messages()[0]}}
</body>
</html>

当url出现错误的时候，进行消息提示404异常

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
from flask import Flask,request,render_template,flash,abort
from flask import url_for
app=Flask(__name__)
app.secret_key='123'
#secret_key是进行消息加密
@app.route('/users/<id>')
def users(id):
	if int(id)==1:
		return render_template('user.html')
	else:
		abort(404)
@app.errorhandler(404)
def not_fount():
	return render_template('404.html')
if __name__=='__main__':
	app.run()
Fork me on GitHub