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Example code of cedricziel/canva-extension-helper

Informations about the package canva-extension-helper

Canva.com extensions with PHP

Some utilities for building canva extensions.

Usage

Installation

Via composer:

With Symfony

Symfony projects usually come with a fully configured serializer and a configured http server layer.

The following Symfony controller is enough for a "Publish" extension with the basic layout:

You can then "bind" the $canvaSecret constructor argument to your Canva.com secret in services.yaml:

Serialization

Note: This project provides model classes. De-/Serialization must be done by means of your application.

Example using the Symfony Serializer component:

Checking incoming requests

Canva requires extensions to check incoming requests for a timestamp skew and a matching HMAC signature. This packages provides helpers to cope with that easily.

Checking the timestamp:

For examples on how to check the signatures, please check the middleware section.

Middlewares

Canva requires you to check requests coming from their end. You can do so by manually verifying the timestamp headers with the Canva\HttpHelper class, or opt for a middleware you have to mount on the paths that canva will be talking to.

Canva\MiddlewareTimestampMiddleware - Checks the time skew Canva\Middleware\PostHMACMiddleware - Checks the signature on POST requests Canva\Middleware\GetHMACMiddleware - Checks the signature on GET requests

Disclaimer

This project is not affiliated with Canva.com

License

MIT

All versions of canva-extension-helper with dependencies

PHP Build Version
Package Version
Requires php Version ^7.4 || ^8.0
ext-json Version *
psr/http-factory Version ^1.0
psr/http-server-handler Version ^1.0
psr/http-server-middleware Version ^1.0
psr/log Version ^1.1
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