I am sending some data to my server via $AJAX, now i keep getting the
Token Mismatch Exception Error
.
When i use $http i do not get this error so i do not understand what makes $AJAX soo different. I have checked online for solutions but all the solutions involved doing something like this:
<meta name="csrf-token" content="{{ csrf_token() }}">
Thing is i do not use blade, my client code is completely independent of any server code so using methods like that is not an option, plus i also had a situation in the past where i had to refresh my application after making a post before i could make another post using that method, i dunno why.
What i am basically asking is how to GET CSRF Token from the server using only javascript and SET it in my header in my AJAX request without any server code.
I am using Jquery AJAX for this NOT the $http service in AngularJS
The GET part is the main issue here.
Related
I get 419 unknown status when making a post request via ajax to API.
I know this problem is because of the CORS request. I added it on
client side but do I need to also set request headers , allow-origin
etc from API also ? if yes how do I include response headers in API
?
NOTE
I have already included all the token stuff according to the docs of
laravel-5.5 and internal requests works perfectly. I am using AJAX.
I finally solved it.
I defined my api routes in web.php instead of routes/api.php
Everything now works perfect without any errors
Laravel returns a 419 error often when failing CSRF verifications. This sounds like your problem, because you're making a POST request.
Make sure you add the CSRF token to the request. If you're using jQuery you could do something like this:
$.ajaxSetup({
headers: {
'X-CSRF-TOKEN': $('meta[name="csrf-token"]').attr('content')
}
});
Make sure you add this to your <head> tag:
<meta content="{{ csrf_token() }}" name="csrf-token" />
Edit
I did some research and I'm pretty sure it's the CSRF token which is missing.
The only place where a 419 status code is return in Laravel is here: Exceptions/Handler.php. If dive a little bit deeper you find that the only place where a TokenMismatchException is thrown is at VerifyCsrfToken. So either the CSRF token is missing or it is wrong.
I want to enable CSRF in my SailsJS and Angular 2 application but I have been having endless problems.
The Angular app is on a page that is only accessible after a user has logged in, controlled by Sails policies.
Then I http.get the CSRF token from the /csrfToken route and store it, adding it to HTTP headers when doing a POST.
I was continually getting CSRF mismatch errors and I finally realised that the /csrfToken route was returning a different value every time, both from a http.get and also when accessing the URL from the browser.
It wasn't clear that this was happening when I went through this tutorial (see 00:30) for a multi-page application where the CSRF value is submitted as a hidden field in a form, and there doesn't seem to be any mention of how to change this behaviour in the Sails documentation.
How can I configure Sails so that it will maintain a single CSRF value for a session?
UPDATE: It’s working now
I have made my update an answer as advised.
It turns out that there were different issues that were causing my problems.
My code had become so fragmented that I didn’t realise I was referencing an older function that was putting the CSRF into the header wrong.
I rolled back a bunch of client-side code and then magically the CSRF value remained consistent between Ajax calls and also worked correctly in the POST request.
So I guess there was something in my fragmented code that had caused the CSRF token to change between API calls but I don’t know what it was.
Visiting /csrfToken in the browser still produces a different result every time but it does not seem to affect the API calls.
EDIT
I discovered that the CSRF changes with each request to /csrfToken. One of my mistakes was that after I stored the CSRF value the first time I then (accidentally) requested a new /csrfToken again later, which then invalidated the stored value. Using the stored value would then result in a CSRF mismatch error as a new value had been issued.
I am having a hard time making CSRF Guard to work on Ajax Requests in my Grails Application. I already added the Javascript Servlet in the page and followed instructions in their website. The problem is that it kept on saying that I have missing token. Aside from that, our Ajax request is not inside a form which I would assume that CSRF would look for forms and auto-inject the token for Ajax POST requests. I just merely get each parameters and pass it as data in my Ajax POST request.
You should try with the pattern outlined by the author of this question Grails - Is there a recommended way of dealing with CSRF attacks in AJAX forms?
I am trying to use ajax in my spring mvc application. When I try a url (post/get) which is secured and needs authentication, the response is the html of login page as it is redirected behind the scenes.
What is the best approach to overcome this issue?
First, I would avoid displaying Ajax links to URLs needing authentication if the user is not authenticated, if possible.
If not always possible, your login page could be returned with a specific HTTP response code, (or any other way to distinguish it from a normal response) and your JavaScript callback could replace the entire body of the current page with the HTML received if this response code is received. Most AJAX libraries come with a way to define a handler to all the AJAX requests. Such a global handler could be used here.
The login page could also be adapted to only return a status code in case of an AJAX request, and the JavaScript code would then redirect to the login page (without using AJAX) if this status code is received.
I may not have explained the issue well. So I did not get the right response. However the response from JB Nizet contained some other points. So thank you.
I could solve the issue after coming back to this issue after some time, so
I posted about this on my blog.
I hope it is useful.
Do I need to use csrf tokens in my ajax requests?
I think that someone tricking my users to execute malicious ajax requests from another site, to my site, will fail because of the origin policy, which is handled by the browser, am I right?
I don't care about duplicated requests when using ajax, I'm only asking about the attacks.
Am I at risk if I don't use csrf in my ajax requests?
As per my research,
We can reduce the vulnerability by using POST request(for the request which will take side affect). But thing is that we can forge the POST request as well with form submission, cause same origin policy will not applies plain html for submissions. But it applies to request which are getting generated with JS.
So if you use ajax POST request and you are safe if you are using JSON payload.
Cause url encoded payload(POST request) can be forged with form submission from other sites.
If you use JSON, as it is not possible to send plain text pay load(with out urlform encoded) with html form submission you are safe. Because with ajax POST request if you use urlform encoded data payload it can be forged with POST form submission.
This is how we solved the problem with CSRF token in Ajax requests
http://mylifewithjava.blogspot.com/2010/11/implicit-csrf-protection-of-ajax_22.html
The fact that you are using Ajax doesn't mean that others have to as well. Your server won't be able to distinguish a request made by XHR from one made by <form> submission. (Yes XHR usually adds a header identifying itself, but this is not hard to spoof.)
So yes, you do need to consider CSRF attacks.
Edit
Django have a POC, which is why they and Ruby on Rails now implement CSRF protection on AJAX requests.
Once again, please check your facts before downvoting, and explain what the downvote is for.