Extend current API's in Magento to get items in JSON format

Question

I am a beginner to Magento. I am trying to extend the current API classes in Magento to fulfill my requirements and retrieve data in JSON format. I need:

1. I need to get all stores in a website
2. I need to get all Categories and Subcategories in a specific store
3. I need to get all products in a specific Category.
4. All data retrieved should be in JSON format.

Any blog/Forum topic? Any kind of help?

Thanks in advance.

Answer 1

Please refer to this Magento wiki page http://www.magentocommerce.com/wiki/doc/webservices-api/custom-api#creating_custom_adapter_for_api.

Steps:

1. You need to create a new API Server Adapter that should implement Mage_Api_Model_Server_Adapter_Interface.

2. Create a controller that will run your api server adapter

3. Implement Mage_Api_Model_Server_Adapter_Interface::run() method for process JSON request and return result in JSON. See Mage_Api_Model_Server_Handler_Abstract for understanding Magento API workflow.