本文介绍了防瓶剂注射的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

python/flask如何阻止异物注射?

请考虑以下mwe:

app.py

from flask import Flask, request, render template

app = Flask(__name__)

@app.route('/', methods=['GET','POST'])
def helloworld():
    if request.method == 'GET':
        return render_template('index.html')
    if request.method == 'POST':
        print(request.form['info'])

        ## do something with the info, like write to a database

        return 'nothing'

if __name__ == '__main__':
    app.run(debug=True)

templates/index.html

<html>
<head>
<script src="//ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script>
<script type='text/javascript' src="{{ url_for('static', filename='js/fire.js') }}"></script>
</head>

<body>
<p>Hello world!</p>
</body>
</html>

static/js/fire.js

$(document).click(function() {

    // post data to flask

    $.post('/', {'info': 'test'});

    return false;

};

我的问题是:

是否可以从外国网站进行注射?后续行动:这怎么办? (例如，也许通过发布到我的网站网址的表单?)
如果可以进行注入，我该如何在app.py脚本中阻止注入?

编辑

这是一个非常基本的脚本，可用于针对上述烧瓶应用程序测试进样.接受的答案将阻止此脚本:

Edit

Here is a very basic script that can be used to test injections against the above flask application. The accepted answer blocks this script:

<!DOCTYPE html>
<html>
<body>

<h2>Malicious Form Injection</h2>

<form action='http://127.0.0.1:5000/' method='post'>
  Input 1:<br>
  <input name="info" value="mal1"><br>
  <input type="submit" value="Submit">
</form>


</body>
</html>

app.py

from flask import Flask, request, render template
from flask_wtf.csrf import CSRFProtect

app = Flask(__name__)

CSRFProtect(app)

app.config['SECRET_KEY'] = 'somethignrandom'

@app.route('/', methods=['GET','POST'])
def helloworld():
    if request.method == 'GET':
        return render_template('index.html')
    if request.method == 'POST': # anything post will autocheck csrf
        print(request.form['info'])

        ## do something with the info, like write to a database

        return 'nothing'

if __name__ == '__main__':
    app.run(debug=True)

无需将密钥传递给html模板，因为CSRFProtect将自动传递密钥.

There is no need to pass the secret key to the html template, as CSRFProtect will automatically pass the secret key.

<html>
<head>
<script src="//ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script>
<meta name='csrf-token' content="{{ csrf_token() }}">
<script type='text/javascript' src="{{ url_for('static', filename='js/fire.js') }}"></script>

</head>

<body>
<p>Hello world!</p>
</body>
</html>

script.js

$(document).click(function() {

    // post data to flask

    $.post('/', {'info': 'test', '_csrf_token':$('meta[name="csrf-token"]').attr('content')});

    return false;

};

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防瓶剂注射

防瓶剂注射

问题描述

编辑

Edit

推荐答案

app.py

script.js