WARNING Can t verify CSRF token authenticity rails

Question

I am sending data from view to controller with AJAXand I got this error      WARNING  Can t verify CSRF token authenticity   I think I have to send this token with data   Does anyone know how can I do this    Edit  My solution  I did this by putting the following code inside the AJAX post   headers       X-Transaction    POST Example      X-CSRF-Token      meta name  csrf-token     attr  content

User · Answer

If you are not using jQuery and using something like fetch API for requests you can use the following to get the csrf-token:

document.querySelector('meta[name="csrf-token"]').getAttribute('content')

fetch('/users', {
  method: 'POST',
  headers: {
    'Accept': 'application/json',
    'Content-Type': 'application/json',
    'X-CSRF-Token': document.querySelector('meta[name="csrf-token"]').getAttribute('content')},
    credentials: 'same-origin',
    body: JSON.stringify( { id: 1, name: 'some user' } )
    })
    .then(function(data) {
      console.log('request succeeded with JSON response', data)
    }).catch(function(error) {
      console.log('request failed', error)
    })

User · Answer

oops     I missed the following line in my application js      require jquery ujs   I replaced it and its working             UPDATED            After 5 years  I am back with Same error  now I have brand new Rails 5 1 6  and I found this post again  Just like circle of life   Now what was the issue is  Rails 5 1 removed support for jquery and jquery ujs by default  and added      require rails-ujs in application js   It does the following things    force confirmation dialogs for various actions  make non-GET requests from hyperlinks  make forms or hyperlinks submit data asynchronously with Ajax  have submit buttons become automatically disabled on form submit to prevent double-clicking   from  https   github com rails rails-ujs tree master    But why is it not including the csrf token for ajax request  If anyone know about this in detail just comment me  I appreciate that   Anyway I added the following in my custom js file to make it work  Thanks for other answers to help me reach this code       document   ready function         ajaxSetup       headers           X-CSRF-Token   Rails csrfToken                 ----   ----

User · Answer

If I remember correctly  you have to add the following code to your form  to get rid of this problem    lt    token tag nil    gt    Don t forget the parameter

User · Answer

The best way to do this is actually just use  lt    form authenticity token to s   gt  to print out the token directly in your rails code  You dont need to use javascript to search the dom for the csrf token as other posts mention  just add the headers option as below     ajax     type   post     data    this  sortable  serialize      headers         X-CSRF-Token     lt    form authenticity token to s   gt          complete  function request       url    lt    sort widget images path  widget    gt

User · Answer

You should do this    Make sure that you have  lt    csrf meta tag   gt  in your layout Add beforeSend to all the ajax request to set the header like below        ajax   url   YOUR URL HERE     type   POST     beforeSend  function xhr   xhr setRequestHeader  X-CSRF-Token      meta name  csrf-token     attr  content        data   someData     someData    success  function response            someDiv   html response             To send token in all requests you can use     ajaxSetup     headers         X-CSRF-Token      meta name  csrf-token     attr  content

User · Answer

The top voted answers here are correct but will not work if you are performing cross-domain requests because the session will not be available unless you explicitly tell jQuery to pass the session cookie  Here s how to do that     ajax      url  url    type   POST     beforeSend  function xhr        xhr setRequestHeader  X-CSRF-Token      meta name  csrf-token     attr  content           xhrFields        withCredentials  true

User · Answer

For those of you that do need a non jQuery answer you can simple add the following    xmlhttp setRequestHeader  X-CSRF-Token      meta name  csrf-token     attr  content       A very simple example can be sen here    xmlhttp open  POST   example html  true   xmlhttp setRequestHeader  X-CSRF-Token      meta name  csrf-token     attr  content     xmlhttp send

User · Answer

I just thought I d link this here as the article has most of the answer you re looking for and it s also very interesting  http   www kalzumeus com 2011 11 17 i-saw-an-extremely-subtle-bug-today-and-i-just-have-to-tell-someone

User · Answer

Make sure that you have  lt    csrf meta tag   gt  in your layout Add a beforeSend to include the csrf-token in the ajax request to set the header  This is only required for post requests    The code to read the csrf-token is available in the rails jquery-ujs  so imho it is easiest to just use that  as follows      ajax     url  url    method   post     beforeSend    rails CSRFProtection    data

User · Answer

if someone needs help related with Uploadify and Rails 3 2  like me when I googled this post   this sample app may be helpful   https   github com n0ne Uploadify-Carrierwave-Rails-3 2 3 blob master app views pictures index html erb  also check the controller solution in this app

User · Answer

I struggled with this issue for days  Any GET call was working correctly  but all PUTs would generate a  Can t verify CSRF token authenticity  error  My website was working fine until I had added a SSL cert to nginx   I finally stumbled on this missing line in my nginx settings   location  puma        proxy set header X-Forwarded-For  proxy add x forwarded for       proxy set header Host  http host       proxy redirect off      proxy set header X-Forwarded-Proto https      Needed to avoid  WARNING  Can t verify CSRF token authenticity      proxy pass http   puma       After adding the missing line  proxy set header X-Forwarded-Proto https    all my CSRF token errors quit   Hopefully this helps someone else who also is beating their head against a wall  haha

User · Answer

Indeed simplest way  Don t bother with changing the headers   Make sure you have    lt    csrf meta tag   gt  in your layouts application html erb   Just do a hidden input field like so    lt input name  authenticity token                  type  hidden                  value   lt    form authenticity token   gt    gt    Or if you want a jQuery ajax post      ajax            type   POST       url    lt    someregistration path   gt        data     firstname    text data 1    last name    text data2    authenticity token     lt    form authenticity token   gt                                                                                            error  function  xhr           alert  ERROR ON SUBMIT               success  function  data             data response can contain what we want here          console log  SUCCESS  data   data

User · Answer

You can write it globally like below   Normal JS     function             loader   hide         document  ajaxStart function                 loader   show                 document  ajaxError function             alert  Something went wrong                  loader   hide                 document  ajaxStop function                 loader   hide                  ajaxSetup           beforeSend  function xhr   xhr setRequestHeader  X-CSRF-Token      meta name  csrf-token     attr  content                   Coffee Script         loader   hide       document  ajaxStart - gt          loader   show        document  ajaxError - gt      alert  Something went wrong              loader   hide        document  ajaxStop - gt          loader   hide        ajaxSetup       beforeSend   xhr  - gt        xhr setRequestHeader  X-CSRF-Token      meta name  csrf-token     attr  content

User · Answer

I m using Rails 4 2 4 and couldn t work out why I was getting   Can t verify CSRF token authenticity   I have in the layout    lt    csrf meta tags   gt    In the controller   protect from forgery with   exception   Invoking tcpdump -A -s 999 -i lo port 3000 was showing the header being set   despite not needing to set the headers with ajaxSetup - it was done already    X-CSRF-Token  XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX Content-Type  application x-www-form-urlencoded  charset UTF-8 X-Requested-With  XMLHttpRequest DNT  1 Content-Length  125 authenticity token XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX   In the end it was failing because I had cookies switched off   CSRF doesn t work without cookies being enabled  so this is another possible cause if you re seeing this error

User · Answer

If you re using javascript with jQuery to generate the token in your form  this works    lt input name  authenticity token          type  hidden          value   lt       meta name csrf-token    attr  content     gt     gt    Obviously  you need to have the  lt    csrf meta tag   gt  in your Ruby layout

User · Answer

Ugrading from an older app to rails 3 1  including the csrf meta tag is still not solving it   On the rubyonrails org blog  they give some upgrade tips  and specifically this line of jquery which should go in the head section of your layout     document  ajaxSend function e  xhr  options     var token      meta name  csrf-token     attr  content      xhr setRequestHeader  X-CSRF-Token   token         taken from this blog post  http   weblog rubyonrails org 2011 2 8 csrf-protection-bypass-in-ruby-on-rails   In my case  the session was being reset upon each ajax request   Adding the above code solved that issue

User · Answer

Use jquery csrf  https   github com swordray jquery csrf     Rails 5 1 or later    yarn add jquery csrf       require jquery csrf  Rails 5 0 or before  source  https   rails-assets org  do   gem  rails-assets-jquery csrf  end       require jquery csrf  Source code   function          document  ajaxSend function e  xhr  options        var token      meta name  csrf-token     attr  content        if  token  xhr setRequestHeader  X-CSRF-Token   token            jQuery

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