flask接收用户输入信息

﹏ヽ暗。殇╰゛Y 2022-12-30 03:46 147阅读 0赞

> 今天我们学习flask框架的东西

## 接收用户提交的信息 ##

以用户登录为例  
首先登录需要 填写账号和密码：  
我们一开始就是要打开网页填写信息信息的  
所以html要这么写：

<!DOCTYPE html>
    <html lang="en">
    <head>
        <meta charset="UTF-8">
        <title>测试哦</title>
    </head>
    
        <form action = "/test" method = "POST">
             账号<input type="text" name="username" ><br/>
             密码<input type="password" name="pw" ><br/>
                <input type="submit" value="提交"><br/>
            {
       {msg}}
        </form>
    
    <body>
    </body>
    </html>

一张图看懂  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzE3ODAyODk1_size_16_color_FFFFFF_t_70]  
后端比较好写，直接放代码上来:

# -*- coding: utf-8 -*-
    from flask import Flask,render_template,request,redirect
    # 创建程序
    # web应用程序
    app = Flask(__name__)
    
    @app.route('/',methods = ['POST','GET'])
    def index():
        return render_template("test.html")
    
    
    @app.route('/test',methods = ['POST','GET'])
    def login():
        username = request.form.get('username')
        password = request.form.get('pw')
        if username =='2528104776' and password=='123':
            return "登录成功!"
        else:
            return render_template('test.html',msg = "登录失败！")
    
    
    app.run(debug = True)

另外有两处容易出错的地方：  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzE3ODAyODk1_size_16_color_FFFFFF_t_70 1]

[jinja文档][jinja]

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzE3ODAyODk1_size_16_color_FFFFFF_t_70]: /images/20221120/aa5c66b573ee442f97d191df2db99251.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzE3ODAyODk1_size_16_color_FFFFFF_t_70 1]: https://img-blog.csdnimg.cn/20201223225452458.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzE3ODAyODk1,size_16,color_FFFFFF,t_70
[jinja]: https://jinja.palletsprojects.com/en/2.11.x/templates/