APEX

APEX 5.0.3, Oracle 11.1

I POST to a REST API to upload a document user picks from the [File Browse] form input. The API expects multi-part form  input with some metadata about the document and the document itself.

I use the following Javascript code in a dynamic action on a button click. This works fine.

Questions

1. How can I combine this with the regular APEX file upload action? In other words, I would like the same file to be uploaded to both locations (Oracle) as well as the REST API

2. How can I extract all the existing documents from an Oracle table and feed them to the REST API?

Thanks

var data = new FormData();
var body = {
      "metadata": {
         "id": "1234",
         "name": "Name of document",
         "date": "2016-09-14",
         "categories": [{ "category1": "Value1", "category2": "Value2" }]
      }
};
data.append('documentset',new Blob([JSON.stringify(body)],{type:"application/json"}));
data.append('document0', apex.jQuery('#P1_FILENAME')[0].files[0]);
apex.jQuery.ajax({    
    beforeSend: function(xhr){
        xhr.withCredentials = true
    },
    url: 'http://server.com/v1/documents',
    data: data,
    cache: false,
    contentType: false,
    processData: false,
    crossDomain: true,
    type: 'POST',
    success: function(d,status,xhr){
        apex.jQuery("#upload-message").text("Document id is "+d.document.id);
    }
});