alt3 / cakephp-swagger

Swagger plugin for documenting your CakePHP APIs

cakephp-swagger

CakePHP 4.x plugin that adds auto-generated Swagger 2.0 documentation to your projects using swagger-php and swagger-ui.

Requirements

• CakePHP 4.0+
• Some swagger-php annotation knowledge

Installation

Install the plugin using composer:

composer require alt3/cakephp-swagger

Enabling

Enable the plugin in the bootstrap() method found in src/Application.php:

    public function bootstrap()
    {
        parent::bootstrap();
        $this->addPlugin('Alt3/Swagger');
    }

Also make sure that AssetMiddleware is loaded inside Application.php or all Swagger page assets will 404.

Installation check

After enabling the plugin, browsing to http://your.app/alt3/swagger should now produce the Swagger-UI interface:

Configuration

All configuration for this plugin is done through the /config/swagger.php configuration file. TLDR full example below.

<?php
use Cake\Core\Configure;

return [
    'Swagger' => [
        'ui' => [
            'title' => 'ALT3 Swagger',
            'validator' => true,
            'api_selector' => true,
            'route' => '/swagger/',
            'schemes' => ['http', 'https']
        ],
        'docs' => [
            'crawl' => Configure::read('debug'),
            'route' => '/swagger/docs/',
            'cors' => [
                'Access-Control-Allow-Origin' => '*',
                'Access-Control-Allow-Methods' => 'GET, POST',
                'Access-Control-Allow-Headers' => 'X-Requested-With'
            ]
        ],
        'library' => [
            'api' => [
                'include' => ROOT . DS . 'src',
                'exclude' => [
                    '/Editor/'
                ]
            ],
            'editor' => [
                'include' => [
                    ROOT . DS . 'src' . DS . 'Controller' . DS . 'AppController.php',
                    ROOT . DS . 'src' . DS . 'Controller' . DS . 'Editor',
                    ROOT . DS . 'src' . DS . 'Model'
                ]
            ]
        ]
    ]
];

UI section

Use the ui section to customize the following Swagger-UI options:

• title: sets the Swagger-UI page title, defaults to cakephp-swagger
• validator: show/hide the validator image, defaults to true
• api_selector: show/hide the api selector form fields, defaults to true
• route: expose the UI using a custom route, defaults to /alt3/swagger/
• schemes: array used to specify third field used to generate the BASE URL (host is fetched realtime, basePath is also fetched realtime if not defined via annotations), defaults to null

Please note that the UI will auto-load the first document found in the library.

Docs section

Use the docs section to customize the following options:

• crawl: enable to crawl-generate new documents instead of serving from filesystem, defaults to true
• route: expose the documents using a custom route, defaults to /alt3/swagger/docs/
• cors: specify CORS headers to send with the json responses, defaults to null

Library section

Use the library section to specify one or multiple swagger documents so:

• swagger-php will know which files and folders to parse for annotations
• swagger-php can produce the swagger json
• this plugin can expose the json at http://your.app/alt3/swagger/docs/:id (so it can be used by the UI)

The following library example would result in:

• swagger-php scanning all files and folders defined in include
• swagger-php ignoring all files and folders defined in exclude
• two endpoints serving json swagger documents:
  • http://your.app/alt3/swagger/docs/api
  • http://your.app/alt3/swagger/docs/editor

'library' => [
    'api' => [
        'include' => ROOT . DS . 'src',
        'exclude' => [
            '/Editor/'
        ]
    ],
    'editor' => [
        'include' => [
            ROOT . DS . 'src' . DS . 'Controller' . DS . 'AppController.php',
            ROOT . DS . 'src' . DS . 'Controller' . DS . 'Editor',
            ROOT . DS . 'src' . DS . 'Model'
        ]
    ]
]

It would also make http://your.app/alt3/swagger/docs produce a json list with links to all available documents similar to the example below.

{
    "success": true,
    "data": [
        {
            "document": "api",
            "link": "http://your.app/alt3/swagger/docs/api"
        },
        {
            "document": "editor",
            "link": "http://your.app/alt3/swagger/docs/editor"
        }
    ]
}

SwaggerShell

This plugin comes with a shell that should simplify deployment in production environments. Simply run the following command to create cakephp_swagger prefixed filesystem documents in tmp/cache for all entities found in your library.

bin/cake swagger makedocs <host>

The host argument (e.g. your.app.com) is required, should not include protocols and is used to set the host property inside your swagger documents.

Quickstart Annotation Example

Explaining swagger-php annotation voodoo is beyond this plugin but to give yourself a head start while creating your first library document you might want to copy/paste the following working example into any of your php files.

Note: the weird non-starred syntax ensures compatibility with the CakePHP Code Sniffer.

<?php
/**
    @SWG\Swagger(
        @SWG\Info(
            title="cakephp-swagger",
            description="Quickstart annotation example",
            termsOfService="http://swagger.io/terms/",
            version="1.0.0"
        )
    )

    @SWG\Get(
        path="/cocktails",
        summary="Retrieve a list of cocktails",
        tags={"cocktail"},
        consumes={"application/json"},
        produces={"application/json"},
        @SWG\Parameter(
            name="sort",
            description="Sort results by field",
            in="query",
            required=false,
            type="string",
            enum={"name", "description"}
        ),
        @SWG\Response(
            response="200",
            description="Successful operation",
            @SWG\Schema(
                type="object",
                ref="#/definitions/Cocktail"
            )
        ),
        @SWG\Response(
            response=429,
            description="Rate Limit Exceeded"
        )
    )

    @SWG\Definition(
        definition="Cocktail",
        required={"name", "description"},
        @SWG\Property(
            property="id",
            type="integer",
            description="CakePHP record id"
        ),
        @SWG\Property(
            property="name",
            type="string",
            description="CakePHP name field"
        ),
        @SWG\Property(
            property="description",
            type="string",
            description="Description of a most tasty cocktail"
        )
    )
*/

Which should result in:

Additional Reading

• The Swagger Specification
• PHP Annotation Examples
• Swagger Document Checklist

Contribute

Before submitting a PR make sure:

• PHPUnit and CakePHP Code Sniffer tests pass
• Coveralls Code Coverage remains at 100%