webmcp
view framework/env/request/set_csrf_secret.lua @ 157:004d2d50419e
Allow direct usage of json.null values in JSON library (for writing, not reading)
| author | jbe |
|---|---|
| date | Thu Jul 31 03:45:33 2014 +0200 (2014-07-31) |
| parents | 9fdfb27f8e67 |
| children | 32ec28229bb5 |
line source
1 --[[--
2 request.set_csrf_secret(
3 secret -- secret random string
4 )
6 Sets a secret string to be used as protection against cross-site request forgery attempts. This string will be transmitted to each action via a hidden form field named "_webmcp_csrf_secret". If this function is called during an action, and there is no CGI GET/POST parameter "_webmcp_csrf_secret" already being set to the given secret, then an error will be thrown to prohibit execution of the action.
8 --]]--
10 function request.set_csrf_secret(secret)
11 if
12 request.get_action() and
13 cgi.params._webmcp_csrf_secret ~= secret
14 then
15 error("Cross-Site Request Forgery attempt detected");
16 end
17 request._csrf_secret = secret
18 end