webmcp
view framework/env/request/set_csrf_secret.lua @ 428:52ebde158c92
Fixed minor glitch regarding floating point numbers (e.g. 0.009) in JSON encoder; Distinguish between integers and floats in JSON encoder if Lua version >= 5.3
| author | jbe |
|---|---|
| date | Thu Jan 14 17:40:49 2016 +0100 (2016-01-14) |
| parents | 32ec28229bb5 |
| children |
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 request._http_request.post_params["_webmcp_csrf_secret"] ~= secret
14 then
15 error("Cross-Site Request Forgery attempt detected");
16 end
17 request._csrf_secret = secret
18 end