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Flask 用法

简单模板

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from flask import Flask, session, redirect, url_for, escape, request

app=Flask(__name__)

@app.errorhandler(404)
def page_not_found(e):
    template = '''{%% extends "layout.html" %%}
{%% block body %%}
    <div class="center-content error">
        <h1>Oops! That page doesn't exist.</h1>
        <h3>%s</h3>
    </div>
{%% endblock %%}
''' % (request.url)
    return render_template_string(template), 404

@app.route('/nodes/get', methods=['GET'])
def get_nodes():
    request.args.get('aaa')
    return jsonify(response), 200

if __name__ == '__main__':
    app.run(host='127.0.0.1', port=8888)

获取参数

  • GET: 

    1
    request.args.get('aaa')

  • POST: 

    1
        request.form["key"]

  • Session: 

    1
    session["key"]

  • Cookie 

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    username = request.cookies.get('username')
resp.set_cookie('username', 'the username')

路径参数

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```python
@app.route('/user/<username>')
def show_user_profile(username):
    # show the user profile for that user
    return 'User %s' % escape(username)

@app.route('/post/<int:post_id>')
def show_post(post_id):
    # show the post with the given id, the id is an integer
    return 'Post %d' % post_id

@app.route('/path/<path:subpath>')
def show_subpath(subpath):
    # show the subpath after /path/
    return 'Subpath %s' % escape(subpath)
```

跳转

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@app.route('/')
def index():
    return redirect(url_for('login'))

@app.route('/')
def hello():
    return redirect("https://www.exampleURL.com", code = 302)