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Packing to Request/Response for APIs

This library was developed to meet Piggly team requirements. It may not work to you, but work so well to us, expanding the flexibility of our HTTP management.

Today, there are a lot of ways to manipulate requests and responses at PHP. The most common pattern is following the PSR-7 interfaces (see here), which makes easy to manipulate HTTP protocol data.

But, nothing is perfect. Some frameworks, smart customizations and even handcraft artists can create your own patterns for handle HTTP requests and responses. It makes hard to packing some data and create libraries without forcing standards.

For example, Laravel uses Illuminate\Http packages which has no PSR-7 implementation. So, when you are creating an external global library which requires PSR-7 implementation, well... Laravel artists has to do some fixes to everythings work well an so on.

We know, you can get the PSR-7 from Laravel Requests\Response, but then you have to go back if you want to use native Laravel HTTP resources and functions. Why so complicated? And, this is main reason to our library exists. To solve it. By implementing smart abstract classes to request and response which can handle any type request and response objects, still access the original request/response and use the most common methods.

First of all, this library was thought to APIs. An API has some behaviours attached to requests and responses. In general, from API requests we get body parameters, query string parameters and headers.

We also want to packing content data for responses as smart objects. Or even, transform request parameters to smart objects to better handle expected values and validation. And better, we can handle exceptions by automatically converting it to a response with no headache.

To achieve it, at responses we include an standard payload with status and messages, as:

• status_code (int): with response code into API;
• status_message (string): a supplemental message to request;
• status_hint (string|array): helping to solve response issues or smart tips;

The response payload, however, will have two different behavior. When, response code is equal to BaseResponse::SUCCESS_CODE, then payload will be the response. If not, then payload will be added to body key at response. See below:

Responses incluing code as BaseResponse::SUCCESS_CODE:

Any other responses codes:

From now, by usign this package, our libraries are much more flexibles. It doesn't care if you're using the pure PHP variables, PSR-7 interfaces or event Illuminate\Http. Just packing whatever Request and Response objects you are using to a basic BaseRequest and BaseResponse objects without losing your original objects.

See below how everything works.

BaseRequest object

The BaseRequest object defines the HTTP request for application. It's an abstract class which makes our original request object acessible and do some universal implementations:

• hasHeader( string $name ) method to check if a header is present on request;
• header( string $name, $default = null ) method to get some header from request;
• getHeaders() method to get an array with all headers as an array;
• getQueryParams() method to get all query string parameters as an array;
• getParsedBody() method to get all body parameter as an array;
• getFiles() method to get all $_FILES as an array;
• setAttribute( string $key, $default ) method to set a request attribute;
• getAttribute( string $key, $default = null ) method to get a request attribute;
• getMethod() method to get the http request method;

And has some functions:

• request() method to make original request object acessible;
• payloableBody( string $class ) method to convert body parameters to an object which implements PayloadImportable;
• payloableQuery( string $class ) method to convert query string parameters to an object which implements PayloadImportable.

BaseResponse object

The BaseResponse object defines the HTTP response for application. It's an abstract class which makes our original response object acessible and do one universal implementation:

• handle() method to handle current BaseResponse object to original response object.

And has some functions:

• response() method to make original response object acessible;
• request( BaseRequest $request ) and getRequest() to manipulate request;
• payload( HttpPayloadInterface $payload ) and getPayload() to manipulate response payload data;
• hint( $hint ) and getHint() to manipulate response hints;
• message( $message ) and getMessage() to manipulate response message;
• code( int $code ) and getCode() to manipulate response code;
• httpCode( int $http_code ) and getHttpCode() to manipulate response HTTP code;
• header( string $name, $value ), withHeaders( array $headers ) and getHeaders() to manipulate response headers;
• getContent() which parses response data to an array;

PayloadRequest and PayloadResponse

Both manage payloads for Requests and Responses. They are not required. However, BaseResponse will require any PayloadInterface to dealing with payloads.

ResponseException handler

Create an exception that can be handled to a response. It will make easy just throw an exception to client which can be converted to a response object. And has some functions:

• getPayload() and payload() to manage response payload.
• getHint() to get response hint.
• getHttpCode() to get response HTTP code.
• handle() method to handle the response object.

There is also some default exceptions models to throw:

Changelog

See the CHANGELOG file for information about all code changes.

Testing the code

This library uses the PHPUnit. We carry out tests of all the main classes of this application.

Contributions

See the CONTRIBUTING file for information before submitting your contribution.

Credits

• Caique Araujo
• All contributors

Support the project

Piggly Studio is an agency located in Rio de Janeiro, Brazil. If you like this library and want to support this job, be free to donate any value to BTC wallet 3DNssbspq7dURaVQH6yBoYwW3PhsNs8dnK ❤.

License

MIT License (MIT). See LICENSE.