Скачать или смотреть How to Easily Retrieve a JWT Token from Node.js to a .NET Application

Discover how to obtain a `JWT token` from a Node.js server in your C# .NET application using HttpClient. Step-by-step guide included!
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This video is based on the question https://stackoverflow.com/q/67902121/ asked by the user 'Perry J' ( https://stackoverflow.com/u/5700213/ ) and on the answer https://stackoverflow.com/a/67904794/ provided by the user 'B. Lec' ( https://stackoverflow.com/u/6520054/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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How to Retrieve a JWT Token from Node.js to a .NET Application

In modern web applications, using a JSON Web Token (JWT) for authentication is a standard practice. If you're developing a .NET application that needs to interact with a Node.js server for authentication, you might wonder how to obtain the JWT token effectively. In this guide, we'll walk you through the process step by step, ensuring you can seamlessly integrate these technologies.

The Problem

Imagine you have a Node.js server set up to issue JWT tokens, and you want your C# .NET application to be able to request and use these tokens for user authentication. The main challenge you face is making sure that when you call the endpoint on your Node.js server, you receive the JWT token in return.

You might already have a functioning API, which returns a placeholder response like "Eureka!" when accessed, but how do you modify the API to return the actual JWT token? Let's dive into the solution.

Setting Up the Node.js API

Install Necessary Packages: Ensure you have the required packages installed, which includes Express and Axios.

Create the Token Endpoint: Update your current endpoint to actually send the JWT token back to the client instead of just returning a confirmation message.

Here’s how you can update your Node.js code:

[[See Video to Reveal this Text or Code Snippet]]

Consuming the API in C#

Now that your Node.js API is correctly set up to return the JWT token, the next step is to update your C# code to read this token.

Set Up the Response Classes: Create a class to represent the token structure that you will be sending back from the Node.js API.

[[See Video to Reveal this Text or Code Snippet]]

Call the API and Retrieve the Token: Update your async method to extract and utilize the JWT token.

[[See Video to Reveal this Text or Code Snippet]]

Alternative Approach: Do Everything in C#

If you prefer not to use Node.js, you can handle the entire token retrieval process within your C# application. Here's a snippet to achieve that:

[[See Video to Reveal this Text or Code Snippet]]

Conclusion

By following these steps, you should now be able to retrieve a JWT token from a Node.js server in your C# .NET application effectively. Whether you choose to handle this process in Node.js or do it all within your C# application, the methods outlined above provide a clear pathway to achieving your authentication needs.

Feel free to reach out with any questions or share your experiences integrating Node.js with .NET applications in the comments below!