How to Create Web Hook Url In ASP.NET Core Web API?

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Setting Up the ASP.NET Core Web API Project

Before we dive into creating the webhook functionality, let's set up the ASP.NET Core Web API project.

• Open Visual Studio 2022.
• Click on "Create a new project."
• Select "ASP.NET Core Empty Project."
• Provide a name and location for your project, and click "Create."
• Now select Framework ".NET 8.0".
• Click "Create" to generate the project structure.

Creating the Post Webhook

Now, we will start creating the post webhook in the project created above. First, we will add two more files; one is an interface, and the other is a repo class for the logical calculation, as given in the below image.

We have generated two new files, IWebHookRepo and WebHookRepo, as you can see above. The Program.cs file needs to be changed as shown below.

using WebHookDemo;

var builder = WebApplication.CreateBuilder(args);
var app = builder.Build();

app.MapGet("/", () => "Hello World!");

//Listen for POST webhooks
app.MapPost("/webhook", async (HttpContext context, IWebHookRepo receiveWebook) =>
{
    using StreamReader stream = new StreamReader(context.Request.Body);
    return await receiveWebook.UpdateTransactionStatus(await stream.ReadToEndAsync(), context);
});


app.Run();

We've built an endpoint, /webhook, in the code above, and it's set to receive HTTP POST requests. The UpdateTransactionMethod action method is triggered upon receipt of a request, and it forwards the request to the repository class. This technique can be tailored to handle the webhook payload in a way that best suits the needs of your application. We are utilizing the IWebHook interface's UpdateTransactionStatus method. We may now view the interface's method.

namespace WebHookDemo
{
    public interface IWebHookRepo
    {
        public Task<int> UpdateTransactionStatus(string root, HttpContext httpContext);
    }
}

In the above code, we have created a method in the interface IWebHookRepo.

Implementing Webhook Handling Logic

Now, we will implement this interface in the WebHookRepo class. Depending on your use case, you may need to implement specific logic to handle the webhook payload. This could involve processing the data, triggering actions, or updating the state of your application. Modify the UpdateTransactionStatus method to include the necessary business logic to handle the incoming requests.

using System.Data;

namespace WebHookDemo
{
    public class WebHookRepo: IWebHookRepo
    {
        /// <summary>
        ///
        /// </summary>
        /// <param name="root"></param>
        /// <param name="httpContext"></param>
        /// <returns></returns>
        public async Task<int> UpdateTransactionStatus(string root, HttpContext httpContext)
        {
            int result = 0;

            //This is where you would put your actual business logic for receiving webhooks
            try
            {
                //write your logic here
            }
            catch (Exception ex)
            {
                throw ex;
            }
            return result;
        }
    }
}

In the above code, we implemented the method UpdateTransactionStatus. We can write our logic here that can update transaction status accordingly in our database as well.

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