lua-recaptcha

Google backend implementation for lua.

Installation

#luarocks install lua-recaptcha

Client side integration

Paste the following snippet in the HEAD section

<script src='https://www.google.com/recaptcha/api.js'></script>

Paste the following at the end of the form. You need to specify the callback function to
handle the result.

<button class="g-recaptcha" data-sitekey="<your-site-key>" data-callback="YourOnSubmitFn"> Submit </button>

API

new(site_key, secret_key)

• param site_key string from google dashboard
• param secret_key string from google dashboard

valid(g_captcha_response, remote_ip)

• param g_captcha_reponse string the value of g-captcha-response
• param remote_ip string client remote ip address
• return boolean

Usage

  local recaptcha = require 'recaptcha'
  local captcha   = recaptcha:new(site_key, secret_key) 
  if captcha.valid(g_captcha_response, remote_ip) then
    ngx.say('valid captcha')
  end

Reference

Recaptcha API