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Mojolicious::Plugin::CSRFProtect - Fully protects you from CSRF attacks


    # Mojolicious

    # Mojolicious::Lite
    plugin 'CSRFProtect';

    # Use "form_for" helper and all your html forms will have CSRF protection token

    <%= form_for login => (method => 'post') => begin %>
           <%= text_field 'first_name' %>
           <%= submit_button %>
    <% end %>

    # Place jquery_ajax_csrf_protection helper to your layout template
    # and all non GET/HEAD/OPTIONS  AJAX requests will have CSRF protection token (requires JQuery)

    <%= jquery_ajax_csrf_protection %>

    # Custom error handling
    $self->plugin('CSRFProtect', on_error => sub {
        my $c = shift;
        # Do whatever you want here
        # ...


Mojolicious::Plugin::CSRFProtect is a Mojolicious plugin which fully protects you from CSRF attacks.

It does following things:

1. Adds a hidden input (with name 'csrftoken') with CSRF protection token to every form (works only if you use form_for helper from Mojolicious::Plugin::TagHelpers.)

2. Adds the header "X-CSRF-Token" with CSRF token to every AJAX request (works with JQuery only)

3. Rejects all non GET/HEAD/OPTIONS requests without the correct CSRF protection token.

If you want protect your GET/HEAD/OPTIONS requests then you can do it manually

In template: <a href="/delete_user/123/?csrftoken=<%= csrftoken %>">

In controller: $self->is_valid_csrftoken()



You can pass custom error handling callback. For example

    $self->plugin('CSRFProtect', on_error => sub {
        my $c = shift;
        $c->render(template => 'error_403', status => 403 );



This helper overrides the form_for helper from Mojolicious::Plugin::TagHelpers

and adds hidden input with CSRF protection token.


This helper adds CSRF protection headers to all JQuery AJAX requests.

You should add <%= jquery_ajax_csrf_protection %> in head of your HTML page.


returns CSRF Protection token.

In templates <%= csrftoken %>

In controller $self->csrftoken;


With this helper you can check $csrftoken manually. It will take $csrftoken from $c->param('csrftoken');

$self->is_valid_csrftoken() will return 1 or 0


Viktor Turskyi <>


Please report any bugs or feature requests to bug-mojolicious-plugin-csrfprotect at, or through the web interface at I will be notified, and then you'll automatically be notified of progress on your bug as I make changes.

Also you can report bugs to Github



This plugin followes the same aproach but it works in different manner.

It will parse your response body searching for '<form>' tag and then will insert CSRF token there.


Copyright 2011 Viktor Turskyi

This program is free software; you can redistribute it and/or modify it under the terms of either: the GNU General Public License as published by the Free Software Foundation; or the Artistic License.

See for more information.