How to catch g-recaptcha-response?

Darrell338

I have an asp.net mvc web application that uses Google's reCAPTCHA. I need to be able to catch the g-recaptcha-response in my controller so that I can verify the user's response. How can I do this?

Carl787

Catching the g-recaptcha-response in ASP.NET MVC is a simple way to add an extra layer of security to your application. This is especially important when handling sensitive data or user information.
There are a few steps that need to be taken to successfully catch and use this piece of information.

Add the ReCaptcha Control to the page -
The first step is to add the captcha control to the page. You can do this either by manually typing the code into the page or by using a third-party library such as ReCaptcha.Net.
Handle the request -
The second step is to have your controller handle the request. You will need to set up a method to receive and capture the g-recaptcha-response from the page. You can use the Request object to get the response from the form or from the QueryString. Use the following code snippet to get the response:

string gRecaptchaResponse = Request[“g-recaptcha-response”];

Verify the Captcha Response -
Finally, you will need to use the Captcha Verification API to check if the response is valid. The API is fairly straightforward and will return either true or false depending on the validity of the response.

Hopefully, this guide has provided you with everything you need to get started with catch and using the g-recaptcha-response in your ASP.NET MVC application. For more detailed information, you can check out Google's official tutorial here: https://developers.google.com/recaptcha/docs/v3

Good luck!

brandy_barnett

Catching g-recaptcha-response in an ASP.NET MVC application can be done by implementing reCaptcha v3, a modern version of the popular reCaptcha service. reCaptcha v3 is a JavaScript API that helps you detect abusive web traffic in real-time.

To implement reCaptcha v3, first you have to register a website on the Google reCaptcha Admin Console website. After registration, you will be given a Site Key and a Secret Key. The Site Key is used in the HTML code of your website, while the Secret Key is used for verification through the API calls.

After obtaining these two keys, you have to implement the following steps:

Integrate the reCaptcha v3 script in the head of your page’s HTML code.
Add an HTML element (e.g., a div) that will be used to hold the g-recaptcha-response token.
To obtain the g-recaptcha-response, you need to call the grecaptcha.ready() function after the page loads, and add a callback function.
The callback function should contain a call to the grecaptcha.execute() method to obtain the g-recaptcha-response.
Finally, use AJAX to submit the response token to your backend verification API.

Once the backend receives the g-recaptcha-response, you should use the Secret Key for its verification. After the response is verified, you proceed with the application authentication or whatever further processing is needed.