google-recaptcha-api

A simple library of captcha based on Google reCAPTCHA Server API that supports Node.js.

Install

Using npm

npm install google-recaptcha-api --save

Usage

Node.js usage

You can use google-recaptcha-v2 in browser.

const GoogleReCaptcha = require('google-recaptcha-api');
const captcha = new GoogleReCaptcha('your_server_captcha_key');
try {
    const res = await captcha.validate('captcha_token', 'user_ip');
    if (res.success) {
        //The response token is valid.
    } else {
        //The response token is invalid.
    }
} catch(e) {
    //Some exception, such as network error => request timeout.
}

You can get server_captcha_key from Google reCAPTCHA Admin Console.

Method

new GoogleReCaptcha(secret, host) => Create an instance of google-recaptcha-api.

• secret => required, the shared key between your site and reCAPTCHA.
• host => optional, API hostname, default value is www.google.com. Specially, some areas require network proxying, such as China, just set www.recaptcha.net.

instance.validate(response, remoteip) => Using the following API to ensure the response token is valid. Return value is a promise, you can use async-await synchronizing code.

• response => required, the user response token provided by the reCAPTCHA client-side integration on your site.
• remoteip => required, the user's IP address.

License

google-recaptcha-api is MIT licensed.