CSRF with Django, React+Redux using Axios

Question

This is an educational project, not for production. I wasn't intending to have user logins as part of this.

Can I make POST calls to Django with a CSRF token without having user logins? Can I do this without using jQuery? I'm out of my depth here, and surely conflating some concepts.

For the JavaScript side, I found this redux-csrf package. I'm not sure how to combine it with my POST action using Axios:

export const addJob = (title, hourly, tax) => {
  console.log("Trying to addJob: ", title, hourly, tax)
  return (dispatch) => {
    dispatch(requestData("addJob"));
    return axios({
      method: 'post',
      url: "/api/jobs",
      data: {
        "title": title,
        "hourly_rate": hourly,
        "tax_rate": tax
      },
      responseType: 'json'
    })
      .then((response) => {
        dispatch(receiveData(response.data, "addJob"));
      })
      .catch((response) => {
        dispatch(receiveError(response.data, "addJob"));
      })
  }
};

---

On the Django side, I've read this documentation on CSRF, and this on generally working with class based views.

Here is my view so far:

class JobsHandler(View):

    def get(self, request):
        with open('./data/jobs.json', 'r') as f:
            jobs = json.loads(f.read())

        return HttpResponse(json.dumps(jobs))

    def post(self, request):
        with open('./data/jobs.json', 'r') as f:
            jobs = json.loads(f.read())

        new_job = request.to_dict()
        id = new_job['title']
        jobs[id] = new_job

        with open('./data/jobs.json', 'w') as f:
            f.write(json.dumps(jobs, indent=4, separators=(',', ': ')))

        return HttpResponse(json.dumps(jobs[id]))

I tried using the csrf_exempt decorator just to not have to worry about this for now, but that doesn't seem to be how that works.

I've added {% csrf_token %} to my template.

This is my getCookie method (stolen from Django docs):

function getCookie(name) {
    var cookieValue = null;
    if (document.cookie && document.cookie !== '') {
        var cookies = document.cookie.split(';');
        for (var i = 0; i < cookies.length; i++) {
            var cookie = cookies[i].trim();
            // Does this cookie string begin with the name we want?
            if (cookie.substring(0, name.length + 1) === (name + '=')) {
                cookieValue = decodeURIComponent(cookie.substring(name.length + 1));
                break;
            }
        }
    }
    return cookieValue;
}

I've read that I need to change the Axios CSRF info:

var axios = require("axios");
var axiosDefaults = require("axios/lib/defaults");

axiosDefaults.xsrfCookieName = "csrftoken"
axiosDefaults.xsrfHeaderName = "X-CSRFToken"

Where do I stick the actual token, the value I get from calling getCookie('csrftoken')?

Answer 1

For me, django wasn't listening to the headers that I was sending. I could curl into the api but couldn't access it with axios. Check out the cors-headers package... it might be your new best friend.

I fixed it by installing django-cors-headers

pip install django-cors-headers

And then adding

INSTALLED_APPS = (
    ...
    'corsheaders',
    ...
)

and

MIDDLEWARE = [  # Or MIDDLEWARE_CLASSES on Django < 1.10
    ...
    'corsheaders.middleware.CorsMiddleware',
    'django.middleware.common.CommonMiddleware',
    ...
]

into my settings.py

I also had

ALLOWED_HOSTS = ['*']
CORS_ORIGIN_ALLOW_ALL = True
CORS_ALLOW_CREDENTIALS = True
CORS_EXPOSE_HEADERS = (
    'Access-Control-Allow-Origin: *',
)

in my settings.py although that is probably overkill

Answer 2

You could add the Django-provided CSRF token manually into all of your post requests, but that's annoying.

From the Django docs:

While the above method (manually setting CSRF token) can be used for AJAX POST requests, it has some inconveniences: you have to remember to pass the CSRF token in as POST data with every POST request. For this reason, there is an alternative method: on each XMLHttpRequest, set a custom X-CSRFToken header to the value of the CSRF token. This is often easier, because many JavaScript frameworks provide hooks that allow headers to be set on every request.

The docs have code you can use to pull the CSRF token from the CSRF token cookie and then add it to the header of your AJAX request.

Answer 3

The "easy way" almost worked for me. This seems to work:

import axios from 'axios';
axios.defaults.xsrfHeaderName = "X-CSRFTOKEN";
axios.defaults.xsrfCookieName = "XCSRF-TOKEN";

And in the settings.py file:

CSRF_COOKIE_NAME = "XCSRF-TOKEN"

Answer 4

There is actually a really easy way to do this.

Add axios.defaults.xsrfHeaderName = "X-CSRFToken"; to your app config and then set CSRF_COOKIE_NAME = "XSRF-TOKEN" in your settings.py file. Works like a charm.

Answer 5

I've found out, that axios.defaults.xsrfCookieName = "XCSRF-TOKEN"; and CSRF_COOKIE_NAME = "XCSRF-TOKEN"

DOESN'T WORK IN APPLE Safari on Mac OS

The solution for MAC Safari is easy, just change XCSRF-TOKEN to csrftoken

So, in js-code should be:

    import axios from 'axios';
    axios.defaults.xsrfHeaderName = "X-CSRFTOKEN";
    axios.defaults.xsrfCookieName = "csrftoken";

In settings.py:

    CSRF_COOKIE_NAME = "csrftoken"

Answer 6

This configuration works for me without problems Config axios CSRF django

import axios from 'axios'

/**
 * Config global for axios/django
 */
axios.defaults.xsrfHeaderName = "X-CSRFToken"
axios.defaults.xsrfCookieName = 'csrftoken'

export default axios