How to use the Hyperf framework for API interface development

How to use the Hyperf framework for API interface development

1. Preface
   In the current Web development, API interfaces have become an indispensable part . Hyperf is a high-performance framework based on Swoole and PHP coroutines. It provides various tools and components to facilitate developers to quickly build high-performance API interfaces. This article will introduce how to use the Hyperf framework for API interface development and provide specific code examples.

2. Environment setup
   First, we need to set up the development environment of the Hyperf framework in the local environment. You can use the Composer tool to create a Hyperf project by running the following command in the terminal:

   composer create-project hyperf/hyperf hyperf-demo

3. Create API Controller
   In the Hyperf framework, we can define it by creating a controller API interface. In the terminal, switch to the project root directory and execute the following command to create an API controller:

   php bin/hyperf.php make:controller User

   This will create an API named UserController# in the App/Controller directory ## controller file.

4. Define API interface methods

   In the
   UserController controller file, we can define multiple methods to handle different API interfaces. For example, we can define a method named getUser to obtain user information. The code example of the method is as follows:

   <?php
   
   declare(strict_types=1);
   
   namespace AppController;
   
   use HyperfHttpServerAnnotationController;
   use HyperfHttpServerAnnotationGetMapping;
   
   /**
    * @Controller(prefix="/user")
    */
   class UserController
   {
    /**
     * @GetMapping(path="get")
     */
    public function getUser(): array
    {
        return [
            'id' => 1,
            'name' => 'John Doe',
            'email' => 'john.doe@example.com',
        ];
    }
   }

   In the above code, we use the

   Controller and GetMapping annotations to identify the controller and method. GetMapping Annotations define the request method and path of the API interface.

5. Start the Hyperf service

   In the terminal, switch to the project root directory and execute the following command to start the Hyperf service:
   

   php bin/hyperf.php start

   After successful startup, Hyperf will listen At the address

   http://127.0.0.1:9501.

Test API interface
6. Use any API testing tool, such as Postman or curl command, to send a GET request to
   http://127.0.0.1:9501/user/getAddress to obtain user information.
Interface verification and exception handling
7. In actual development, we often need to verify and exception handle the API interface. The Hyperf framework provides rich verification and exception handling tools to easily implement these functions.
   

For example, we can add parameter verification and exception throwing code in the

getUser method:

<?php

declare(strict_types=1);

namespace AppController;

use HyperfHttpServerAnnotationController;
use HyperfHttpServerAnnotationGetMapping;
use AppRequestUserRequest;
use HyperfDiAnnotationInject;
use HyperfValidationContractValidatorFactoryInterface;

/**
 * @Controller(prefix="/user")
 */
class UserController
{
    /**
     * @Inject
     * @var ValidatorFactoryInterface
     */
    protected $validationFactory;

    /**
     * @GetMapping(path="get")
     */
    public function getUser(UserRequest $request): array
    {
        $validator = $this->validationFactory->make($request->all(), $request->rules());

        if ($validator->fails()) {
            throw new InvalidArgumentException($validator->errors()->first());
        }

        return [
            'id' => 1,
            'name' => 'John Doe',
            'email' => 'john.doe@example.com',
        ];
    }
}

In the above code, we use

UserRequest class to define validation rules for user request parameters. Obtain the ValidatorFactoryInterface interface through dependency injection, and use its make method to create a validator. If validation fails, we throw an InvalidArgumentException exception.

Conclusion
8. Through the introduction of this article, we have learned how to use the Hyperf framework for API interface development and provided specific code examples. The Hyperf framework provides a wealth of tools and components to help developers quickly build high-performance API interfaces. I hope this article will be helpful to you in API interface development.
   

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