flask 中的 request 对象用来获取请求信息

其中有以下

• args 所有 query 参数
• form 所有 get 参数
• cookies 所有 cookie 参数

from app import app
from flask import request, render_template_string, make_response


@app.route('/')
@app.route('/index')
def index():
    return '''Hello World. <br>
    click here to login: <a href="/login"> login </a> <br>
    click here to query: <a href="/query?a=1&b=2"> query </a> <br>
    click here to set cookie: <a href="/cookie"> set cookie </a>
    '''

1. post 数据

@app.route('/login', methods=['GET', 'POST'])
def login():
    if request.method == 'POST':
        username = request.form['username']
        if username == 'kur0mi':
            return 'login success.'
        else:
            return 'login failed.'
    
    return '''
    <form action="" method="post">
        username: <input type="text" name="username">
        <input type="submit" value="login">
    </form>
    '''

2. get 数据

@app.route('/query')
def query():
    return render_template_string('''
    <table border=1>
        {% for k, v in args.items() %}
            <tr>
                <th> {{ k }} </th>
                <td> {{ v }} </td>
            </tr>
        {% endfor %}
    </table>
    ''', args=request.args)

3. cookie 数据

@app.route('/cookie', methods=['GET', 'POST'])
def cookie():
    if request.method == 'POST':
        user = request.form['user']
        resp = make_response('''welcome to here to setcookie.
        ''')
        resp.set_cookie('user', user)
        return resp

    return render_template_string('''
    <form action="" method="post">
        user: <input type="text" name="user">
        <input type="submit" value="set cookie">
    </form>
    this are you cookies?
    <table border=1>
        {% for k, v in cookies.items() %}
            <tr>
                <th> {{ k }} </th>
                <td> {{ v }} </td>
            </tr>
        {% endfor %}
    </table>
    ''', cookies=request.cookies)