Showing posts with label Command Line. Show all posts

Sunday, 8 March 2020

Spring Boot - Test RESTful web service using curl client | Test a REST API with curl

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Mastering API Testing with CURL

While tools like Postman are great, every backend developer should know how to use the command line for quick and powerful testing. In this tutorial, we "simplify" how to test your Spring Boot REST API using the CURL command-line tool.

Why Use CURL?

CURL is a versatile tool available on almost every operating system. We cover the essential commands you need to interact with your services:

GET Requests: Learn how to fetch data and view headers directly from your terminal.
POST & PUT: Master sending JSON data payloads and setting Content-Type headers correctly.
DELETE: See how to quickly remove resources with a single line of code.
Authentication: How to pass basic authentication credentials through the command line.

The Professional Advantage

Using CURL allows for faster debugging and easy scripting of tests. We demonstrate these commands against a live Spring Boot application, showing you exactly what the server returns for each request. This skill is invaluable for automating workflows and working in environments where a GUI might not be available.

Level Up Your Workflow

By mastering CURL, you add a lightweight and powerful tool to your Java Developer utility belt. It simplifies the bridge between your backend logic and real-world network requests, ensuring your RESTful Web Services are robust and well-tested.

📥 Get the Source Code!

The complete source code and examples used in this tutorial are available! Check out the download links in the YouTube video description above to follow along.

Tuesday, 11 June 2019

How to Change the Default Port number of Spring Boot Application using command line properties?

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Change Spring Boot Port Without Touching Your Code

We've all been there: you're trying to run your Spring Boot application, but port 8080 is already in use by another program. While you can change this in your properties file, did you know you can override it without editing a single line of code? This guide shows you the fastest way to stay flexible.

Why Avoid Code Changes?

Imagine you're deploying your app to a server where you don't have access to the source code, or you just want to run two instances of the same app locally for testing. By using command-line arguments, you can tell Spring Boot which port to use at the exact moment you start the application.

The Magic Command

Spring Boot is incredibly smart. When you run your JAR file, you can pass the port as an argument. It’s the ultimate "quick fix" for port conflicts and makes your application much more portable and professional.

Beginner Tip: Check Your Logs

Whenever you try a new port, always keep an eye on your console. If the change was successful, you'll see a message like "Tomcat initialized with port(s): XXXX" right at the start. It’s the easiest way to confirm your app is up and running exactly where you want it!

Key Takeaway: Externalizing your configuration—even at the command line—is a hallmark of a great developer. It keeps your code clean and your deployment smooth!

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