I have a struts2 webapp in which I need to implement CSRF protection. For statis forms it is pretty straight forward. I just need to activate the tokenSession interceptor & then set <s:token/> in the form to be submitted. (explained here and here)
But the problem appears when I need to enable CSRF protection for POST AJAX calls (I am using jQuery) which are not necessarily submitted via forms. I face the issue of re-using token when making subsequent AJAX calls.
Any pointers or different approaches are appreciated.
Currently I have resolved the issue by generating tokens for AJAX requests and sending it with the normal response like so -
Map<String, String> tokenInfo = Maps.newHashMap();
tokenInfo.put("struts.token.name", TokenHelper.getTokenName());
tokenInfo.put(TokenHelper.getTokenName(), TokenHelper.setToken());
I will abstract out a util method out of this & have the Actions that are token-activated to return this as part of response for actions which will be executed repeatedly without refresh of the page.
I am still looking for an elegant solution to this though.
Can't you generate a Token and use it as parameter in the ajax call ?
For the subsequent AJAX calls, you can use a per-user Token,
not necessarily a per-request Token,
as explained in this SO answer: Do I need a CSRF token for jQuery .ajax()?
