AspNetCore.ReCaptcha 1.1.0

AspNetCore.ReCaptcha

ReCAPTCHA Library for .NET Core 2.x/3.x/5.x.

Requirements

This package requires a secret key as well as a site key provided by ReCaptcha. You can aquire your keyset at https://www.google.com/recaptcha/intro/v3.html. It's possible to use either v2 or v3 ReCaptcha.

Installation

You can install this package using NuGet. You can use the following command:

# Package Manager
PM> Install-Package AspNetCore.ReCaptcha

# .NET CLI
dotnet add package AspNetCore.ReCaptcha

Configuration

Place the aquired secret key and site key in the appsettings.json of your project. An example of the appsettings file is below:

{
    "ReCaptcha": {
        "SiteKey": "your site key here",
        "SecretKey": "your secret key here",
        "Version": "v2"
    }
}

Usage

To use AspNetCore.ReCaptcha in your project, you must add the following code to your startup.cs:

public void ConfigureServices(IServiceCollection services) {
    services.AddReCaptcha(Configuration.GetSection("ReCaptcha"));
}

In your .cshtml file you add the following using statement:

@using AspNetCore.ReCaptcha

And then you can add the ReCaptcha element to your DOM using the following code:

@Html.ReCaptcha

The action that you will be posting to (in this case SubmitForm) will need the following attribute on the method:

[ValidateReCaptcha]
[HttpPost]
public IActionResult SubmitForm(ContactViewModel model)
{
    if (!ModelState.IsValid)
        return View("Index");

    TempData["Message"] = "Your form has been sent!";
    return RedirectToAction("Index");
}

Examples

For every version of .NET Core there is a configured example included in this repository. Check the Samples map for those examples.