Flask-WTF对CSRF令牌设置时间限制 [英] Flask-WTF set time limit on CSRF token

问题描述

我目前正在使用Flask-WTF v0.13.1，我的网站上有一些表格，所有表格都包含CSRF令牌.

I'm currently using Flask-WTF v0.13.1, i have a few forms on my website, all created including the CSRF token.

由于某些原因，我必须在每种表单上设置不同的到期时间，到目前为止，我可以在创建csrf令牌时手动设置 time_limit 值.

For some reasons i have to set a different expiration on each form, so far i could set manually the time_limit value upon creating the csrf token.

根据更改日志 time_limit 不见了，文档中也没有关于如何更改它的参考.在源代码中，我看到该表单具有 csrf_time_limit 元参数.

I would like to update to the v0.14, according to the changelog time_limit is gone and there is no reference in the docs on how to change it anymore. Looking in the source code i saw that the form has a csrf_time_limit meta parameter.

我试图在表单上设置该参数:

I tried to set that parameter on my form:

from flask_wtf import FlaskForm

class myForm(FlaskForm):
    class Meta:
        csrf_time_limit = 7200

    content = TextAreaField('content')

尽管调试 csrf.py

Although debugging the csrf.py module i see that the validate_csrf_token of _FlaskFormCSRF is actually never called.

相反，在方法 protect()中调用方法 validate_csrf ，在这种情况下，永不考虑元参数.

The method validate_csrf is called within the method protect() instead, in this case the meta parameter is never considered.

我不知道这是否是程序包中的错误，或者我是否缺少某些东西.

I don't understand if this is a bug of the package or if i'm missing something.

更新:

示例代码:

app.py

from flask import Flask, render_template, request
from flask_wtf.csrf import CSRFProtect
from flask_wtf import FlaskForm
from wtforms import IntegerField

csrf = CSRFProtect()
app = Flask(__name__)
app.config.update(dict(
    SECRET_KEY="super secret key"
))

csrf.init_app(app)

class MyForm(FlaskForm):
    class Meta:
        csrf_time_limit = 1

    id = IntegerField('id')

@app.route("/", methods=['GET', 'POST'])
def test_form_csrf():
    if request.method == 'POST':
        myForm = MyForm(request.form)
        print(myForm.id.data)

    return render_template('test_form.html', myForm= MyForm())

templates/test_form.html

templates/test_form.html

<form method="post" action="/">
    <input type="hidden" name="csrf_token" value="{{ csrf_token() }}" />
    {{ myForm.id }}
    <input type="submit" value="test" />
</form>

requirements.txt

requirements.txt

click==6.7
Flask==0.12.2
Flask-WTF==0.14.2
itsdangerous==0.24
Jinja2==2.10
MarkupSafe==1.0
Werkzeug==0.14.1
WTForms==2.1

项目结构

app.py
templates
|
--- test_form.html

要运行代码，

FLASK_APP=app.py flask run

我还在此行上放置了一个调试断点检查 time_limit 的实际值，该值始终为 3600 .

I also put a debug breakpoint on this line to check the actual value of time_limit, the value is always 3600.

推荐答案

按照您的

Following your changelog link, I looked through the commit and found these lines:

if time_limit is None:
    time_limit = current_app.config.get('WTF_CSRF_TIME_LIMIT', 3600)

将 app.config ['WTF_CSRF_TIME_LIMIT'] 设置为一些较短的值似乎可行.我已使用 app.config ['WTF_CSRF_TIME_LIMIT'] = 30 将其设置为30秒，并且表单在该时间段后过期，但是我没有尝试使用比默认值更长的值.

Setting app.config['WTF_CSRF_TIME_LIMIT'] to some shorter value seems to work. I have set it to 30 seconds with app.config['WTF_CSRF_TIME_LIMIT'] = 30 and the form expired after that amount of time, but I have not tried a longer value than the default.

我不确定是否可以即时更改app.config值，以解决无法为每个表单设置过期时间的问题.

I am not sure if you can change an app.config value on the fly in order to hack your way around not being able to set an expiration per form.

这篇关于Flask-WTF对CSRF令牌设置时间限制的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！