Question

我希望我的Android应用能够将一些信息发送到我的django服务器。所以我让android应用程序发送一个帖子请求到mysite / upload页面，django的这个页面的视图将根据帖子数据工作。问题是服务器为post请求提出的响应抱怨csrf验证失败。看看问题，似乎我可能必须首先从服务器获取一个csrf令牌，然后使用该令牌执行帖子但是我不确定我是如何做到的。编辑：我发现我可以使用视图装饰器@csrf_exempt来解决此视图的crsf验证，但我不确定这是否是最佳解决方案。我的android代码：

// Create a new HttpClient and Post Header
                    HttpClient httpclient = new DefaultHttpClient();
                    HttpPost httppost = new HttpPost(URL);

                    // Add your data
                    List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>(2);
                    nameValuePairs.add(new BasicNameValuePair("scoreone", scoreone));
                    nameValuePairs.add(new BasicNameValuePair("scoretwo", scoretwo));
                    httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));
                    System.out.println("huzahhhhhhh");
                    // Execute HTTP Post Request
                    HttpResponse response = httpclient.execute(httppost);
                    BufferedReader in = new BufferedReader(new InputStreamReader(response.getEntity().getContent()));
                    StringBuffer sb = new StringBuffer("");
                    String line = "";
                    String NL = System.getProperty("line.separator");
                    while ((line = in.readLine()) != null) {
                        sb.append(line + NL);
                    }
                    in.close();
                    String result = sb.toString();
                    System.out.println("Result: "+result);

以及我处理上传的观看代码：

# uploads a players match
def upload(request):
    if request.method == 'POST':
        scoreone = int(request.POST['scoreone'])
        scoretwo = int(request.POST['scoretwo'])
        m = Match.objects.create()
        MatchParticipant.objects.create(player = Player.objects.get(pk=1), match = m, score = scoreone)
        MatchParticipant.objects.create(player = Player.objects.get(pk=2), match = m, score = scoretwo)
    return HttpResponse("Match uploaded" )

enter code here

Answer 1

首先，您需要从预览请求中读取Cookie中的csrf令牌：

httpClient.execute(new HttpGet(uri));
CookieStore cookieStore = httpClient.getCookieStore();
List <Cookie> cookies =  cookieStore.getCookies();
for (Cookie cookie: cookies) {
    if (cookie.getDomain().equals(Constants.CSRF_COOKIE_DOMAIN) && cookie.getName().equals("csrftoken")) {
        CSRFTOKEN = cookie.getValue();
    }
}

如果您的视图未呈现包含csrf_token的模板模板标签，Django可能不会设置CSRF令牌cookie。这是在表单动态添加到页面的情况下很常见。至解决这种情况，Django提供了一个强制的视图装饰器设置cookie：ensure_csrf_cookie（）。 - https://docs.djangoproject.com/en/dev/ref/contrib/csrf/#ajax

然后，您可以在执行发布请求时将其传递到发布请求标头和Cookie上的服务器：

httpPost.setHeader("Referer", Constants.SITE_URL);
httpPost.setHeader("X-CSRFToken", CSRFTOKEN);

DefaultHttpClient client = new DefaultHttpClient();
final BasicCookieStore cookieStore =  new BasicCookieStore();

BasicClientCookie csrf_cookie = new BasicClientCookie("csrftoken", CSRFTOKEN);
csrf_cookie.setDomain(Constants.CSRF_COOKIE_DOMAIN);
cookieStore.addCookie(csrf_cookie);

// Create local HTTP context - to store cookies
HttpContext localContext = new BasicHttpContext();
// Bind custom cookie store to the local context
localContext.setAttribute(ClientContext.COOKIE_STORE, cookieStore);

HttpResponse response = client.execute(httpPost, localContext);

Answer 2

编写自己的装饰器并为您的请求添加一些“秘密”标题。 https://code.djangoproject.com/browser/django/trunk/django/views/decorators/csrf.py

def csrf_exempt(view_func):
        """
        Marks a view function as being exempt from the CSRF view protection.
        """
        # We could just do view_func.csrf_exempt = True, but decorators
        # are nicer if they don't have side-effects, so we return a new
        # function.
        def wrapped_view(request,*args, **kwargs):
            return view_func(request, *args, **kwargs)
            if request.META.has_key('HTTP_X_SKIP_CSRF'):
                wrapped_view.csrf_exempt = True
        return wraps(view_func, assigned=available_attrs(view_func))(wrapped_view)

Answer 3

关闭CSRF验证肯定有效！但你确定要这么做吗？你最初的思路;从服务器获取令牌并将其与POST数据一起发送要好得多。

csrf令牌通常以cookie的形式出现。例如，对于Django框架，您有一个名为csrftoken的cookie，您需要获取该值并将其作为“X-CSRFToken”发布到服务器

Android向django服务器csrf发送post请求失败

3 个答案: