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C++ REST API

Building a REST API

C++ REST API with Crow handles CRUD with JSON responses.

Introduction to Crow

Crow is a C++ microframework that makes it easy to build RESTful APIs. It is inspired by Python's Flask framework and supports routing, middleware, and JSON handling. In this tutorial, we'll explore how to use Crow to create a REST API that performs CRUD operations with JSON responses.

Setting Up Your Environment

Before you start, ensure you have a C++ compiler, CMake, and Boost libraries installed. You can install Crow through its GitHub repository. Clone the repository and include it in your project.

Creating a Basic Crow Application

To create a basic Crow application, you need to set up a simple HTTP server. Below is an example of how to do this:

Handling JSON in Crow

Crow can easily handle JSON requests and responses. You can use `crow::json::wvalue` to create JSON objects. Here's an example where we return a JSON response:

Implementing CRUD Operations

Let's implement a simple CRUD application to manage a list of items. We'll use an in-memory data structure to store our items.

Testing Your API

To test your API, you can use tools like Postman or Curl. Send HTTP requests to the endpoints you've set up to create, retrieve, update, and delete items. Verify the JSON responses to ensure the API is working as expected.

Conclusion

In this tutorial, we demonstrated how to set up a C++ REST API using Crow. We covered the basics of handling JSON and implementing CRUD operations. This foundation allows you to expand and build more complex APIs with additional features.

Examples

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