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使用Ajax POST请求,Django CSRF检查失败

更新时间:2022-10-23 17:26:24

实际解决方案 p>

好的,我设法追踪问题。它在于Javascript(如我在下面建议的)代码。



您需要的是:

 $。ajaxSetup({
beforeSend:function(xhr,settings){
function getCookie(name){
var cookieValue = null;
if (document.cookie&& document.cookie!=''){
var cookies = document.cookie.split(';');
for(var i = 0; i&这个cookie字符串是以我们想要的名字开头的?
if(cookie.substring((...));
var cookie = jQuery.trim 0,name.length + 1)==(name +'=')){
cookieValue = decodeURIComponent(cookie.substring(name.length + 1));
break;
}
}
}
返回cookieValue;
}
如果(! (/^http:.*/.test(settings.url)|| /^https:.*/.test(settings.url))){
//只将令牌发送到相对URL,即本地。
xhr.setRequestHeader(X-CSRFToken,getCookie('csrftoken'));
}
}
});

而不是官方文档中发布的代码:
http://docs.djangoproject.com/en/1.2/ref/contrib/csrf/#ajax



工作代码来自此Django条目: http://www.djangoproject.com/weblog/2011/feb/08/security/



所以一般的解决方案是:使用ajaxSetup处理程序的ajaxSend处理程序。我不知道为什么它的作品。但是它适用于我:)



上一篇文章(无答案)



我真的遇到了同样的问题。



更新到Django 1.2.5后,Django 1.2.4(AJAX wasn)中的AJAX POST请求没有错误不要以任何方式保护,但是它的工作很正常)。



就像OP一样,我尝试过在Django文档中发布的JavaScript代码段。我使用的是jQuery 1.5。我也使用django.middleware.csrf.CsrfViewMiddleware中间件。



我试图跟随中间件代码,我知道它失败了: / p>

  request_csrf_token = request.META.get('HTTP_X_CSRFTOKEN','')
/ pre>

然后

  if request_csrf_token!= csrf_token:
return self._reject(request,REASON_BAD_TOKEN)

这个if是真的,因为 request_csrf_token为空。



基本上这意味着标题没有设置。那么这个JS行有什么问题吗?

  xhr.setRequestHeader(X-CSRFToken,getCookie('csrftoken') ); 



我希望提供详细信息将帮助我们解决问题:)


I could use some help complying with Django's CSRF protection mechanism via my AJAX post. I've followed the directions here:

http://docs.djangoproject.com/en/dev/ref/contrib/csrf/

I've copied the AJAX sample code they have on that page exactly:

http://docs.djangoproject.com/en/dev/ref/contrib/csrf/#ajax

I put an alert printing the contents of getCookie('csrftoken') before the xhr.setRequestHeader call and it is indeed populated with some data. I'm not sure how to verify that the token is correct, but I'm encouraged that it's finding and sending something.

But Django is still rejecting my AJAX post.

Here's my JavaScript:

$.post("/memorize/", data, function (result) {
    if (result != "failure") {
        get_random_card();
    }
    else {
        alert("Failed to save card data.");
    }
});

Here's the error I'm seeing from Django:

[23/Feb/2011 22:08:29] "POST /memorize/ HTTP/1.1" 403 2332

I'm sure I'm missing something, and maybe it's simple, but I don't know what it is. I've searched around SO and saw some information about turning off the CSRF check for my view via the csrf_exempt decorator, but I find that unappealing. I've tried that out and it works, but I'd rather get my POST to work the way Django was designed to expect it, if possible.

Just in case it's helpful, here's the gist of what my view is doing:

def myview(request):

    profile = request.user.profile

    if request.method == 'POST':
        """
        Process the post...
        """
        return HttpResponseRedirect('/memorize/')
    else: # request.method == 'GET'

        ajax = request.GET.has_key('ajax')

        """
        Some irrelevent code...
        """

        if ajax:
            response = HttpResponse()
            profile.get_stack_json(response)
            return response
        else:
            """
            Get data to send along with the content of the page.
            """

        return render_to_response('memorize/memorize.html',
                """ My data """
                context_instance=RequestContext(request))

Thanks for your replies!

Real solution

Ok, I managed to trace the problem down. It lies in the Javascript (as I suggested below) code.

What you need is this:

$.ajaxSetup({ 
     beforeSend: function(xhr, settings) {
         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 = jQuery.trim(cookies[i]);
                     // 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;
         }
         if (!(/^http:.*/.test(settings.url) || /^https:.*/.test(settings.url))) {
             // Only send the token to relative URLs i.e. locally.
             xhr.setRequestHeader("X-CSRFToken", getCookie('csrftoken'));
         }
     } 
});

instead of the code posted in the official docs: http://docs.djangoproject.com/en/1.2/ref/contrib/csrf/#ajax

The working code, comes from this Django entry: http://www.djangoproject.com/weblog/2011/feb/08/security/

So the general solution is: "use ajaxSetup handler instead of ajaxSend handler". I don't know why it works. But it works for me :)

Previous post (without answer)

I'm experiencing the same problem actually.

It occurs after updating to Django 1.2.5 - there were no errors with AJAX POST requests in Django 1.2.4 (AJAX wasn't protected in any way, but it worked just fine).

Just like OP, I have tried the JavaScript snippet posted in Django documentation. I'm using jQuery 1.5. I'm also using the "django.middleware.csrf.CsrfViewMiddleware" middleware.

I tried to follow the the middleware code and I know that it fails on this:

request_csrf_token = request.META.get('HTTP_X_CSRFTOKEN', '')

and then

if request_csrf_token != csrf_token:
    return self._reject(request, REASON_BAD_TOKEN)

this "if" is true, because "request_csrf_token" is empty.

Basically it means that the header is NOT set. So is there anything wrong with this JS line:

xhr.setRequestHeader("X-CSRFToken", getCookie('csrftoken'));

?

I hope that provided details will help us in resolving the issue :)